joint groundwater report - Texas Commission on Environmental ...

Table of ContentsACRONYMS ..........................................................................viSUMMARY ............................................................................ 1Purpose and Scope ................................................................... 1Notification to Local Officials and Public Information ....................................... 2Groundwater Protection ............................................................... 3Groundwater Monitoring .............................................................. 3Groundwater Contamination ........................................................... 5GROUNDWATER PROTECTION ........................................................ 11<strong>Texas</strong> Groundwater Protection Committee ............................................... 11Federal Involvement and Coordination ............................................... 12Comprehensive State Groundwater Protection Program .................................. 12Meetings ....................................................................... 13Groundwater Protection Policy ......................................................... 13Groundwater Classification System ..................................................... 13Risk-Based Cleanup Levels ........................................................... 14Groundwater Contamination .......................................................... 17Notification of Groundwater Contamination .............................................. 18Reporting Unauthorized Discharges and Spills ......................................... 19Reporting Historic Contamination ................................................... 20Public Information .................................................................. 20Regulatory Notification to Local Officials ............................................ 20State Agencies' Files ............................................................. 21Other Reports and Publications ..................................................... 21USER’S GUIDE ....................................................................... 23Rules and Definitions Related to Report Compilation ....................................... 23Using the Contamination Case Description Tables ......................................... 24Locating Specific Cases ........................................................... 24Data Fields ..................................................................... 24Enforcement Status Matrix ............................................................ 26Enforcement Status Codes ......................................................... 28Activity Status Codes ............................................................. 29GROUNDWATER PROTECTION PROGRAM DESCRIPTIONS .............................. 31<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong> ........................................ 31Compliance Support Division ...................................................... 32Enforcement Division ............................................................ 33Field Operations Division ......................................................... 34Industrial and Hazardous Waste Division ............................................. 35Municipal Solid Waste ............................................................ 40Petroleum Storage Tank Division ................................................... 42Pollution Cleanup Division ........................................................ 43Water Quality Division ........................................................... 45iii

Table of Contents - ContinuedGroundwater Conservation Districts Map ........................................... A-23Appendix 7. Agency and District Contacts ............................................. A-25Appendix 8. Agency Central Records Locations ........................................ A-29Appendix 9. Other Reports and Publications ........................................... A-31FIGURESFigure 1. Groundwater Contamination Case History Table ....................................... 7Figure 2a. Groundwater Contamination Case History, Total, New, and Ongoing Cases ................ 8Figure 2b. Groundwater Contamination Case History, Activity Status Report Trends ................. 8Figure 3. Contamination Case Descriptions/Data Fields ........................................ 25Figure 4. Enforcement Status Matrix ....................................................... 27Figure 5. Enforcement Status Matrix/Enforcement Status Codes ................................. 28Figure 6. Enforcement Status Matrix/Activity Status Codes ..................................... 30Figure 7. <strong>Texas</strong> Water Development Board Results of Analyses - 1997 ........................... 52Figure 8. <strong>Texas</strong> Water Development Board Sampling Locations - 1997 ............................ 53Figure 9. TNRCC Enforcement Status Summary .....................................TNRCC-185Figure 10. TNRCC County Contamination Map ......................................TNRCC-186Figure 11. RCT Enforcement Status Summary ........................................... RCT-7Figure 12. RCT County Contamination Map ............................................. RCT-8Figure 13. TAGD Enforcement Status Summary ........................................TAGD-3Figure 14. TAGD County Contamination Map ..........................................TAGD-4Figure 15. Groundwater Classification System ............................................. A-11Figure 16. Reportable Quantities (RQ) ................................................... A-15v

ACRONYMSAgencies, Divisions, and ProgramsState LegislationBEG Bureau of Economic Geology of the University of CMRA <strong>Texas</strong> Coal Mining And Reclamation Act<strong>Texas</strong> at Austin SMRA <strong>Texas</strong> Surface Mining and Reclamation ActBRC Bureau of Radiation Control (TDH) SWDA Solid Waste Disposal ActBS/EACD Barton Springs/Edwards Aquifer Conservation TAC <strong>Texas</strong> Agricultural CodeDistrict THSC <strong>Texas</strong> Health and Safety CodeCS Compliance Support Division (TNRCC) TNRC <strong>Texas</strong> Natural Resources CodeDOE United States Department of Energy TRCA <strong>Texas</strong> Radiation Control ActENF Enforcement Division (TNRCC) TWC <strong>Texas</strong> Water CodeEPA United States Environmental Protection Agency WWDA <strong>Texas</strong> Water Well Drillers ActEUWCD Evergreen Underground Water ConservationDistrictFederal LegislationFOD Field Operations Division (TNRCC)IHW Industrial and Hazardous Waste Division AEA Atomic Energy Act(TNRCC) CERCLA Comprehensive Environmental Response,MSW Municipal Solid Waste Division (TNRCC) Compensation, and Liability ActNRC Nuclear Regulatory <strong>Commission</strong> CWA Clean Water Act (Amended as Water Quality ActO&G Oil and Gas Division (RCT) 1988)PCD Pollution Cleanup Division (State and Federal FIFRA Federal Insecticide, Fungicide, and RodenticideSUPERFUND) (TNRCC)ActPST Petroleum Storage Tank Division (TNRCC) HSWA Hazardous and Solid Waste Amendments toRCT Railroad <strong>Commission</strong> of <strong>Texas</strong> RCRA (1984)SM&R Surface Mining and Reclamation Division (RCT) RCRA Resource Conservation and Recovery ActTAES <strong>Texas</strong> Agricultural Experiment Station SARA Superfund Amendments and Reauthorization ActTAEX <strong>Texas</strong> Agricultural Extension Service SDWA Safe Drinking Water ActTAGD <strong>Texas</strong> Alliance of Groundwater Districts SMCRA Surface Mining Control and Reclamation ActTDA <strong>Texas</strong> Department of Agriculture TSCA Toxic Substances Control ActTDH <strong>Texas</strong> Department of Health UMTRCA Uranium Mill Tailings Radiation Control ActTGPC <strong>Texas</strong> Groundwater Protection CommitteeTNRIS <strong>Texas</strong> Natural Resources Information System AbbreviationsTNRCC <strong>Texas</strong> Natural Resource Conservation<strong>Commission</strong> BMP best management practiceTPWD <strong>Texas</strong> Parks and Wildlife Department CAFO concentrated animal feeding operationTSSWCB <strong>Texas</strong> State Soil and Water Conservation Board CFR Code of Federal RegulationsTWDB <strong>Texas</strong> Water Development Board CSGWPP comprehensive state <strong>groundwater</strong> protectionUIC Underground Injection Control Program program(TNRCC) GIS geographic information systemUSGS United States Geological Survey GPS global positioning systemUWCD Underground Water Conservation District GWSAP ground-water sampling and analysis planWQ(D) Water Quality Division (TNRCC) IPD Interagency Pesticide DatabaseWUD Water Utilities Division (TNRCC) LDR land disposal restrictionLOA letter of authorizationLPST leaking petroleum storage tanksMSWLF municipal solid waste landfill facilityNPL national priorities listOSSF on-site sewage facilityPRP potentially responsible partyRQ<strong>report</strong>able quantitySMP state management planUSDW underground source of drinking waterWHP wellhead protectionvi

SUMMARYThe <strong>Texas</strong> Groundwater Protection Committee (TGPC) was created by the 71st <strong>Texas</strong> Legislature in 1989 tobridge gaps between existing state <strong>groundwater</strong> programs and to optimize water-quality protection byimproving coordination among agencies involved in <strong>groundwater</strong> activities. House Bill 1458, codified as§§26.401 through 26.407 of the <strong>Texas</strong> Water Code, sets out the state's <strong>groundwater</strong> protection policy,provides legislative recognition for the TGPC, requires the TGPC to coordinate the <strong>groundwater</strong>protection activities of state agencies, and requires the TGPC develop and update a comprehensive<strong>groundwater</strong> protection strategy for the state.State Law (§26.405 and §26.406 of the <strong>Texas</strong> Water Code) requires the TGPC to annually publish a <strong>report</strong>on <strong>groundwater</strong> monitoring activities and cases of documented contamination associated with activitiesregulated by state agencies. The TGPC is required to prepare this <strong>report</strong> based on the activities of the <strong>Texas</strong>Natural Resource Conservation <strong>Commission</strong> (TNRCC), the <strong>Texas</strong> Water Development Board, the Railroad<strong>Commission</strong> of <strong>Texas</strong> (RCT), the <strong>Texas</strong> Department of Health, the <strong>Texas</strong> Department of Agriculture, the<strong>Texas</strong> State Soil and Water Conservation Board, the <strong>Texas</strong> Alliance of Groundwater Districts, the <strong>Texas</strong>Agriculture Experiment Station, and the Bureau of Economic Geology of the University of <strong>Texas</strong> at Austin.State Law (§5.236 of the <strong>Texas</strong> Water Code) also requires the TNRCC provide notice to local officialsregarding <strong>groundwater</strong> contamination which may affect drinking water supplies in their area. The definitionsof <strong>report</strong>able cases under these two mandates are significantly different. As required by §26.406 of the <strong>Texas</strong>Water Code, the <strong>report</strong> tabulates all cases of <strong>groundwater</strong> contamination documented or under enforcementfor the preceding calendar year. The <strong>report</strong> further identifies those cases subject to notification under §5.236of the <strong>Texas</strong> Water Code for the preceding year in Table 1.This is the TGPC’s ninth edition of the Joint Groundwater Monitoring and Contamination Report. The<strong>report</strong> describes the current status of <strong>groundwater</strong> monitoring programs of each participating agency, anddescribes <strong>groundwater</strong> contamination cases documented or under enforcement during the 1997 calendar year.The <strong>report</strong> further describes the enforcement status of each case of <strong>groundwater</strong> contamination in theaccompanying tables.Purpose and Scope<strong>Texas</strong> Water Code, §26.406, requires the annual <strong>report</strong> to describe the current status of <strong>groundwater</strong>monitoring activities conducted by or required by each agency at regulated facilities or associated withregulated activities. The <strong>report</strong> is required to contain a description of each case of <strong>groundwater</strong> contaminationdocumented during the previous calendar year, and a description of each case of contamination documentedduring previous periods for which enforcement action was incomplete at the time of issuance of the preceding<strong>report</strong>. The <strong>report</strong> is also required to indicate the status of enforcement action for each listed case.This <strong>report</strong> compiles and makes available to the public the status of <strong>groundwater</strong> monitoring associated withactivities regulated or conducted by the contributing state agencies. Groundwater monitoring is conducted bystate agencies to assure regulatory compliance for <strong>groundwater</strong> protection and to assess ambient <strong>groundwater</strong>quality. The <strong>report</strong> provides a general overview of <strong>groundwater</strong> monitoring for the participating agencies on aprogram-by-program basis.1

The <strong>report</strong> further provides the status of documented <strong>groundwater</strong> contamination reasonably suspected ofhaving been caused by activities regulated by state agencies. Groundwater contamination is broadly definedin the <strong>report</strong> as any detrimental alteration of the naturally occurring quality of <strong>groundwater</strong>. It is limited,however, to contamination suspected of being associated with activities under the jurisdiction of thecontributing agencies and affecting usable-quality <strong>groundwater</strong>. Naturally occurring <strong>groundwater</strong> conditions,such as a high degree of mineralization which may exceed established standards for public supplies ofdrinking water, are not included. The scope of the <strong>report</strong> is further limited to <strong>groundwater</strong> contaminationwhich has been documented and to cases which are of relatively recent origin or are currently underenforcement action of some kind. Historical cases of documented contamination have not been includedunless enforcement action is still pending.The <strong>report</strong> provides technical and administrative agency file numbers and file locations for <strong>groundwater</strong>contamination cases, field office locations, and agency contacts to assist interested users of the <strong>report</strong> inobtaining or reviewing case-specific data. In addition, the <strong>report</strong> provides background information onmonitoring and regulatory rules and policies. This information is compiled to assist the public and statepolicy makers in interpreting the current status of <strong>groundwater</strong> contamination in the state and the degree ofstate agency response.The <strong>report</strong> satisfies the legislative intent of §26.406 of the <strong>Texas</strong> Water Code, but must be interpreted in lightof the specific geographic constraints and the specific enforcement authorities and procedures of eachcontributing entity. The conclusions regarding <strong>groundwater</strong> contamination and the specific enforcementactions taken have been made by each individual agency and are not subject to the review of the TGPC.Notification to Local Officials and PublicInformationThis <strong>report</strong> is compiled and made available to the public to provide the annual status of <strong>groundwater</strong>monitoring associated with state agency activities and the annual status of documented <strong>groundwater</strong>contamination reasonably suspected of having been caused by those activities. Monitoring is discussed in theindividual program descriptions and a tabulation of all <strong>groundwater</strong> contamination cases documented orunder enforcement during 1997 are listed. State law (§26.406 of the <strong>Texas</strong> Water Code) requires the agencieswhich have <strong>groundwater</strong> protection responsibilities maintain a public file of all documented cases of<strong>groundwater</strong> contamination. This information is a matter of public record and is available for public reviewby arrangement with each agency.Table 1 identifies cases for which the TNRCC is required, by §5.236 of the <strong>Texas</strong> Water Code, to providenotice to local officials regarding <strong>groundwater</strong> contamination which may affect drinking water supplies intheir area. This <strong>report</strong> serves as the TNRCC’s secondary notice to local officials regarding newly confirmedcases meeting this criteria. This <strong>report</strong> addresses the requirement of §5.236 of the <strong>Texas</strong> Water Code bydistinguishing new cases of contamination (since the compilation of the previous <strong>report</strong>) which have affectedor could potentially affect drinking water supplies. The <strong>report</strong> is provided to county judges and county healthentities to supply information on <strong>groundwater</strong> impacts to drinking water supplies within the county. Section5.236 cases are identified in the <strong>report</strong> only for the year the case was <strong>report</strong>ed. There are 20 §5.236 casesidentified in Table 1.2

Groundwater ProtectionThe regulatory protection of <strong>groundwater</strong> is primarily the responsibility of the TNRCC. Certain activitiesrequiring the regulatory protection of <strong>groundwater</strong> are under the jurisdiction of the Railroad <strong>Commission</strong> of<strong>Texas</strong>, the <strong>Texas</strong> Department of Agriculture, and the <strong>Texas</strong> State Soil and Water Conservation Board. The<strong>Texas</strong> Alliance of Groundwater Districts, as an organization, has no regulatory or enforcement mandate, butindividual <strong>groundwater</strong> districts may have limited authorities for action with regard to <strong>groundwater</strong>contamination. The <strong>Texas</strong> Water Development Board has certain monitoring responsibilities with regard to<strong>groundwater</strong> characterization and planning, but is not authorized to regulate activities which may contaminate<strong>groundwater</strong>. The <strong>Texas</strong> Agricultural Experiment Station and the Bureau of Economic Geology conductresearch activities related to <strong>groundwater</strong>.The state’s <strong>groundwater</strong> protection policy (§26.401 of the <strong>Texas</strong> Water Code) sets out nondegradation of thestate's <strong>groundwater</strong> resources as the goal for all state programs. The policy recognizes the variability of thestate's aquifers, the importance of maintaining water quality for existing and potential uses, the protection ofthe environment and the public health and welfare, and the maintenance and enhancement of the long-termeconomic health of the state. This goal of nondegradation does not mean zero-contaminant discharge. The useof the best professional judgement by the responsible state agencies in attaining the goal and policy is alsorecognized.The TGPC recognized that <strong>groundwater</strong> classification is an important tool to be used in the implementationof the state's <strong>groundwater</strong> protection policy and developed such a system for use by state agencies. Throughclassification, the <strong>groundwater</strong>s in the state can be categorized and protection or restoration measures canthen be specified by member agencies according to the quality and present or potential use of the<strong>groundwater</strong>.The state's policy on <strong>groundwater</strong> contamination is that the quality should be restored if feasible. Recognizingthis situation, the state's policy requires that <strong>groundwater</strong> be kept reasonably free of contaminants that wouldinterfere with present uses or impair future uses of <strong>groundwater</strong>. In response, the TGPC has developed anapproach which focuses on protection of <strong>groundwater</strong> for its highest quality use, related to human health andthe environment, and which addresses the cost of available remediation technologies.Groundwater MonitoringThe <strong>groundwater</strong> monitoring programs of the participating agencies generally fall within one of threecategories: regulatory agencies requiring or conducting monitoring to assure compliance with guidelines andregulations for the protection of <strong>groundwater</strong> from discharges of contaminants; agencies or entitiesconducting monitoring to assess ambient or existing <strong>groundwater</strong> quality conditions and to track changes inwater quality over time; and agencies or entities conducting research activities related to <strong>groundwater</strong>resources and <strong>groundwater</strong> conservation. Detailed monitoring program descriptions are given in each agency'sor entity's section in the chapter entitled Groundwater Protection Program Descriptions.Each regulatory agency which requires or conducts <strong>groundwater</strong> monitoring to assure compliance withguidelines and regulations to protect <strong>groundwater</strong> from discharges of contaminants has its own monitoringprogram requirements and procedures. The criteria used to assess the need for <strong>groundwater</strong> monitoring varyamong the regulatory entities. There are fifteen programs in three agencies monitoring changes in3

<strong>groundwater</strong> quality for permit and operational requirements at approximately 12,400 facilities statewide.Data indicate that an estimated 39,000 monitor and water wells are being used for <strong>groundwater</strong> monitoringpurposes at these facilities. The majority (greater than 99 percent) of the facilities being monitored are underthe jurisdiction of the TNRCC, with the remainder under the jurisdiction of the Railroad <strong>Commission</strong> of<strong>Texas</strong> or the <strong>Texas</strong> Department of Health.The <strong>Texas</strong> Water Development Board and the member districts of the <strong>Texas</strong> Alliance of GroundwaterDistricts conduct <strong>groundwater</strong> monitoring to assess ambient <strong>groundwater</strong> quality conditions through theassessment of particular constituents to track changes in water quality over time. Monitoring programscarried out by the <strong>Texas</strong> Water Development Board and participating organizations involved approximately1,000 water wells in 1997. In addition, over 900 water wells were <strong>report</strong>ed as being monitored for ambient<strong>groundwater</strong> quality and changes over time by the member districts of the <strong>Texas</strong> Alliance of GroundwaterDistricts during 1997. Some monitoring programs are developed for water-quality assessment studies whichtarget specific geographic areas, specific contaminants or constituents, or specific activities. Contaminationcases discovered by these agencies or entities through <strong>groundwater</strong> studies or <strong>groundwater</strong> samplingprograms are referred to the regulatory agency with appropriate jurisdiction.The ambient <strong>groundwater</strong> monitoring network has historic limitations for the parameters which have beenanalyzed. There are very little historical analyses available for constituents which can generally be attributedto anthropogenic (i.e., man-induced) sources. For example, there are limited analyses available forconstituents such as volatile and synthetic organic compounds and certain heavy metals. Ambient monitoringhas not traditionally targeted pesticides. At the current time, various sampling projects and studies havebegun to look at potential contamination of <strong>groundwater</strong> through the normal use of pesticides. Additionalefforts are needed to characterize the potential impact of pesticides on <strong>groundwater</strong>.Regulatory <strong>groundwater</strong> monitoring data are extensive in many program areas, however, the application ofmonitoring requirements within and across regulatory programs can be diverse. This diversity is dependentupon the level of program development and the potential of the regulated activity to impact public health.In general, the waste disposal programs, primarily the TNRCC’s Office of Waste Management and the RCT,are doing an effective job of monitoring existing, permitted facilities. Groundwater monitoring requirementshave been established for the petroleum storage tank, industrial and hazardous waste, municipal waste,underground injection control, pollution cleanup (i.e., Superfund), and enforcement for waste programs.Requirements for the municipal solid waste program currently require monitoring at less than 50 percent ofthe facilities within the program. Additionally, permits required for surface storage and disposal of oil andgas waste and brine retention ensure the protection of <strong>groundwater</strong> by requiring liners, leak detection, and/or<strong>groundwater</strong> monitoring. However, less than two percent of the permanent facilities require <strong>groundwater</strong>monitoring to assure protection of <strong>groundwater</strong> resources.In the drinking water program, public water supply wells receive sufficient monitoring to ensure violations ofdrinking water standards are detected and addressed prior to distribution. Currently, there is no state programfor monitoring domestic wells. The <strong>Texas</strong> Department of Licensing and Registration (TDLR) is responsiblefor monitoring drillers in response to complaints and during spot inspections, and some domestic wellmonitoring may be performed during these site visits.With regard to drinking water programs of the TNRCC, municipal supplies are regulated by the TNRCCClean Water Program within the TNRCC’s Office of Water Resource Management. There are areas wheremonitoring for the protection of <strong>groundwater</strong> could be improved in the wastewater programs. Only 65 out of3,317 private domestic and permitted municipal and industrial wastewater treatment facilities are conducting4

<strong>groundwater</strong> monitoring. Generally, only the newer facilities are being monitored. There are no provisions inthe rules for monitoring at these facilities unless extenuating circumstances are documented andsubstantiated. At 581 permitted agricultural facilities, primarily concentrated animal feeding operations,monitoring of on-site water wells is required. Such monitoring may be insufficient to adequately detectingreleases at or near the surface in many parts of the state.Groundwater ContaminationThe <strong>groundwater</strong> contamination cases listed in this <strong>report</strong> have predominantly been documented throughregulatory requirements for compliance monitoring. The majority of the cases were identified by releasedetection monitoring in the TNRCC’s petroleum storage tank program. Further, the information in this <strong>report</strong>identifies <strong>groundwater</strong> contamination cases which have been documented through investigations in responseto <strong>groundwater</strong> contamination complaints. However, <strong>groundwater</strong> contamination is most commonly detectwhen site-specific <strong>groundwater</strong> monitoring is conducted at waste disposal of product storage sites.Groundwater contamination, as defined by the TGPC for this <strong>report</strong>, is the detrimental alteration of thenaturally occurring physical, thermal, chemical, or biological quality of <strong>groundwater</strong> reasonably suspected ofhaving been caused by the activities of entities under the jurisdiction of the agencies discussed within this<strong>report</strong>. The TGPC recognizes that <strong>groundwater</strong> contamination may result from many sources, includingcurrent and past oil and gas production and related practices, agricultural activities, industrial andmanufacturing processes, commercial and business endeavors, domestic activities, and natural sources thatmay be influenced by, or may result from, human activities. The contamination cases identified in this <strong>report</strong>are primarily those where contaminants have been discharged to the surface, to the shallow subsurface, ordirectly to <strong>groundwater</strong> from activities such as the storage, processing, transport, or disposal of products orwaste materials.There are 7,458 documented <strong>groundwater</strong> contamination cases contained in this <strong>report</strong>. These cases arepresented in a tabular format in the section entitled Groundwater Contamination Case Descriptions.Approximately 99 percent of the documented cases fall under the jurisdiction of the TNRCC. The remainderof the cases fall under the jurisdiction of the Railroad <strong>Commission</strong> of <strong>Texas</strong> (77 cases) and the <strong>groundwater</strong>conservation districts which make up the <strong>Texas</strong> Alliance of Groundwater Districts (20 cases). Of the 7,458cases, 121 are listed more than once. These duplicate case listings reflect separate agency actions at a distinctsite or multiple agency actions at sites with more than one source of <strong>groundwater</strong> contamination.The most common contaminants <strong>report</strong>ed include gasoline, diesel, and other petroleum products. This reflectsthe large number of contamination sites (98 percent of the documented cases) <strong>report</strong>ed by the TNRCC’spetroleum storage tank program. Less common contaminants include organic compounds (such as phenol,trichloroethylene, carbon tetrachloride, dichloroethylene, and naphthalene), pesticides (such as alachlor,atrazine, bromacil, dicamba, and prometon), creosote constituents, solvents, heavy metals, and sodiumchloride.The <strong>report</strong> indicates the status of enforcement action for each case of <strong>groundwater</strong> contamination. Codesdescribing the enforcement status and the activity status are given for each contamination case. In general,regulatory programs are structured to achieve the desired degree of environmental protection at the lowestpossible level of agency oversight. The enforcement status code represents the level of agency proceduralaction in pursuing investigation and remediation.5

Describing an agency's enforcement actions presents only half the regulatory picture. Enforcement isineffective if the required corrective actions are not carried out. Therefore, agency activities dealing withcontamination incidents are assigned an activity status code. This code represents the current actionaddressing the assessment and mitigation of the contamination case. These two indicators (the enforcementstatus and activity status codes) are plotted graphically as a matrix to illustrate their combined effect on theenforcement status of each contamination case. The results of each agency's table are summarized in a matrix,the enforcement status summary, at the end of each <strong>groundwater</strong> contamination case table. The enforcementstatus matrix, enforcement status codes, and activity status codes are discussed in detail in the section entitledUsers’ Guide on pages 23 through 29. Specific enforcement actions are typically described in each agency'sprogram description.All of the 7,459 cases listed in the Appendix have documented <strong>groundwater</strong> contamination summarized inFigure 1. The activity status for each case is identified in the tables. "No activity" has occurred in 34 <strong>report</strong>edcases which are awaiting confirmation of contamination. Detection of contamination is being confirmed(validated) in 1,100 cases. The largest number of cases (3,911) are involved in ongoing investigations.Additionally, there are 311 cases which are in corrective action planning. Action has been implemented in518 cases and there are 348 cases which have an activity status of "monitor action.” No further action isnecessary for 1228 cases that are designated as "action completed." No activity status was given for 9 caseswhere information was not provided.The total number of, and activity status for, <strong>groundwater</strong> contamination cases documented and identified bythe TGPC in this and previous <strong>report</strong>s are tabulated in Figure 1. Figure 2a is a graphical representation of thetotal number of documented contamination cases and the number of new cases of contamination, as well asthe number of sites where ongoing investigation is occurring. Figure 2b is a graphical representation of thehistorical activity status of <strong>groundwater</strong> contamination cases.Several general observations can be drawn from the limited data represented in Figures 1, 2a, and 2b. Thelimited data do not allow for forecasting of probable trends. In addition, the use of the term "trend" may betoo definitive, and should only be considered as a general observation of the historic data compiled to date.The dramatic increase in the total number of contamination cases up to 1992 was closely related to releasedetection monitoring requirements in the TNRCC’s Petroleum Storage Tank (PST) Program. A majority ofthe milestone dates for the implementation of PST release detection monitoring were achieved during thistime-frame. A similar increase has resumed since 1996, due to initiation of milestone deadlines related todetection monitoring and cleanup expense reimbursement.6

Figure 1. Groundwater Contamination Case History TableACTIVITY 1989 1990 1991 1992 1993 1994 1995 1996 1997STATUSTOTAL 2241 3191 4759 5597 5646 5675 5849 6427 7459CASESNEW -- 1303 1247 998 583 376 421 992 1356CASESNO -- 12 8 2 9 12 21 28 34ACTIVITYCONTAMINATION 1237 1349 1717 1284 1407 1598 1481 1163 1100CONFIRMEDONGOING 401 1178 1657 2195 2138 2069 2153 3093 3911INVESTIGATIONCORRECTIVE ACTION 48 85 454 825 749 760 780 674 311PLANNINGACTION 301 329 408 524 717 732 743 663 518IMPLEMENTEDMONITOR -- 193 324 466 264 255 278 296 348ACTIONACTION 254 45 172 273 342 226 371 493 461COMPLETEDNO STATUS -- -- 19 28 20 23 22 17 9GIVENNote: The numbers indicated in the 1997 data include information on the 121 multiple-listed cases.Historically, the number of new <strong>groundwater</strong> contamination cases documented each year is greater than thenumber of cases in which action was completed during the same year. This trend has held since the initialpublication of the <strong>report</strong>. The number of new cases had annually decreased up to 1994, but increased in 1995,in 1996, and again in 1997. These increases are chiefly attributed to increased release detection activity in theTNRCC’s PST program. The reversal is also partially attributed to new cases being <strong>report</strong>ed under theVoluntary Cleanup Program of the TNRCC, established in 1995. The number of cases where action has beencompleted has annually increased (with exceptions in 1994, due to a lack of funding in the PST Program, anda slight decline in 1997). The elevated number of cases where action had been completed in the initial <strong>report</strong>was cumulative up to the end of 1989 (i.e., this <strong>report</strong>ing period was open-ended on the front).7

Figure 2a. Groundwater Contamination Case History, Total, New, and Ongoing Cases80007000600050004000Total CasesNew CasesOngoing Investigation30002000100001989 1990 1991 1992 1993 1994 1995 1996 1997Figure 2b. Groundwater Contamination Case History, Activity Status Report Trends400035003000250020001500No ActivityContamination ConfirmedOngoing InvestigationCorrective Action PlanningAction ImplementedMonitor ActionAction CompletedNo Status Given100050001989 1990 1991 1992 1993 1994 1995 1996 19978

Similar trends are observed in the total number of cases and cases undergoing investigation (Figure 2b). Upto 1995, cases under corrective action planning followed the same trend, but deviated in 1996. These allshowed increases up to 1992, at which time the numbers essentially leveled off until 1995. In 1995, the totalnumber of cases and cases undergoing investigation increased sharply, while cases under corrective actionplanning have decreased. Cases implementing corrective action measures show a similar trend with a oneyearlag. These cases appear to have leveled off from 1993 to 1995, and showed a slight decrease in 1996 and1997. Cases under corrective action planning and action implementation have mirrored each other since 1993.The number of cases being confirmed for contamination peaked in 1991, followed by a dramatic decrease in1992. In relation, the number of cases under investigation and corrective action increased significantly in1992. These lags indicate the cases are moving through the sequence of actions which should ultimately leadto completion.For all of the agencies and entities over the eight-year period from 1989 to 1996 (Figure 1), action has beencompleted on a total of 2,176 <strong>groundwater</strong> contamination cases. These completed <strong>groundwater</strong> contaminationcases were dropped from each successive annual <strong>report</strong>. Action was completed on an additional 461 cases in1997. Action on these cases was considered complete when the desired remedy was achieved or when nofurther regulatory action was required.9

GROUNDWATER PROTECTIONThe following material is provided to give an overview of <strong>groundwater</strong> protection issues related to: the <strong>Texas</strong>Groundwater Protection Committee (TGPC), the state’s <strong>groundwater</strong> protection policy, the TGPC’srecommended <strong>groundwater</strong> classification system, risk-based cleanup levels for <strong>groundwater</strong>, the definition of<strong>groundwater</strong> contamination as it applies to this <strong>report</strong>, and notification to and from regulatory agenciesconcerning <strong>groundwater</strong> contamination. Additional sources of public information are also discussed.<strong>Texas</strong> Groundwater Protection CommitteeThe <strong>Texas</strong> Groundwater Protection Committee was created by the 71st <strong>Texas</strong> Legislature in 1989 as a meansto bridge gaps between existing state <strong>groundwater</strong> programs and to optimize water-quality protection byimproving coordination among agencies involved in <strong>groundwater</strong> activities. House Bill 1458 (codified as§§26.401 through 26.407 of the <strong>Texas</strong> Water Code) established the TGPC; outlined the TGPC’s powers,duties, and responsibilities; and established the state’s <strong>groundwater</strong> protection policy.The TGPC actively identifies opportunities to improve existing <strong>groundwater</strong> quality programs and promotescoordination between agencies. The TGPC also strives to improve or identify areas where new or existingprograms could be enhanced to provide additional protection. Major responsibilities of the TGPC are:< to improve interagency coordination in the area of <strong>groundwater</strong> protection;< to develop and update a comprehensive <strong>groundwater</strong> protection strategy for the state;< to study and recommend to the Legislature <strong>groundwater</strong> protection programs for areas in which<strong>groundwater</strong> is not protected by current regulation;< to publish an interagency <strong>groundwater</strong> monitoring and contamination <strong>report</strong>;< to file with the governor, lieutenant governor, and speaker of the House of Representatives a <strong>report</strong> of theTGPC’s activities during the biennium preceding each regular legislative session, including anyrecommendations for legislation for <strong>groundwater</strong> protection; and< to advise the TNRCC on the development of agricultural chemical plans to prevent <strong>groundwater</strong>pollution.The TGPC’s membership is composed of the following individuals or their designated representative:< the executive director of the <strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>;< the executive administrator of the <strong>Texas</strong> Water Development Board;< a representative selected by the Railroad <strong>Commission</strong> of <strong>Texas</strong>;< the commissioner of health of the <strong>Texas</strong> Department of Health;< the deputy commissioner of the Department of Agriculture;< the executive director of the <strong>Texas</strong> State Soil and Water Conservation Board;< a representative selected by the <strong>Texas</strong> Alliance of Groundwater Districts;< the director of the <strong>Texas</strong> Agriculture Experiment Station; and< the director of the Bureau of Economic Geology, University of <strong>Texas</strong> at Austin.The executive director of the <strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong> serves as the TGPC’schairman. The TNRCC is designated as the lead agency for the TGPC and administers the activities of the11

TGPC. The executive administrator of the <strong>Texas</strong> Water Development Board serves as the TGPC’s vicechairman.TGPC members and their designated representatives are listed in Appendix 1.Federal Involvement and CoordinationIn March 1985, the <strong>Texas</strong> Department of Water Resources, predecessor to the <strong>Texas</strong> Natural ResourceConservation <strong>Commission</strong> and the <strong>Texas</strong> Water Development Board, received a grant from the U.S.Environmental Protection Agency (EPA) to improve the coordination of <strong>groundwater</strong> protection activitiesundertaken by state agencies. In response to this federal mandate, the interagency Groundwater ProtectionCommittee, predecessor to the <strong>Texas</strong> Groundwater Protection Committee, was formed. Since that time, thecoordination of <strong>groundwater</strong> protection activities of the various state programs and agencies and thedevelopment of a <strong>groundwater</strong> protection strategy have been guided and funded through EPA grantsadministered under the Clean Water Act, Section 106. During fiscal year 1991, the EPA required each state toreassess its <strong>groundwater</strong> protection strategies in a process called profiling the respective state’s <strong>groundwater</strong>protection program. The TGPC completed this profile for submission to the EPA.Comprehensive State Groundwater Protection ProgramIn evaluating the states’ activities under the <strong>groundwater</strong> protection strategy initiative begun in the early1980s, the EPA concluded that additional efforts were needed to protect the nation’s <strong>groundwater</strong>. Duringfiscal years 1992 and 1993, the EPA developed and published draft guidance for the development of acomprehensive state <strong>groundwater</strong> protection program (CSGWPP). The CSGWPP guidance encourages thestates to further their efforts in developing existing programs into a more comprehensive approach. The finalguidance was published early in 1993.The EPA’s guidance first calls for the development of a core protection program, a basic program from whichstates would work with the EPA over the next few years to build a fully integrated protection program. Whilethis is a voluntary program, the EPA has promised greater program flexibility for states with endorsedprograms. The TGPC feels that the existing components of <strong>Texas</strong>’ program should meet the EPA’s criteriafor a core program.Because <strong>groundwater</strong> protection programs are a patchwork of federal, state, and local efforts that focus onindividual sources of contamination rather than protection of the resource as a whole, the TGPC has begun todevelop a comprehensive state <strong>groundwater</strong> protection program. The CSGWPP consists of six strategicactivities:< establishing a common protection goal;< establishing priorities to achieve the most efficient and effective means of achieving the goal;< defining roles and responsibilities of all program areas;< implementing all necessary efforts to accomplish the goal;< coordinating information; and< improving public education and participation.The TGPC prepared a core program assessment and submitted it to the EPA for endorsement in October1993. The core assessment compared the State’s <strong>groundwater</strong> protection program, as strengthened andcoordinated by the TGPC, to federal CSGWPP guidance. The TGPC feels that the assessment demonstrated12

core program compliance, thus providing the base from which to develop the fully integrating CSGWPP. TheEPA provided comments on the core assessment in February 1995. The TGPC has initiated efforts to addressthe EPA’s comments and finalize the <strong>Texas</strong>-specific core program assessment. The TGPC will develop thesix strategic activities of the CSGWPP, including milestones for achieving a fully integrated <strong>groundwater</strong>protection program.MeetingsThe TGPC meets quarterly; meeting times and agenda are published in the <strong>Texas</strong> Register and on theTGPC’s World Wide Web site at . The public is invited to attend all TGPCmeetings and to participate on subcommittees. The TNRCC maintains audio tapes and written records of allTGPC meetings. The TNRCC maintains a mailing list of TGPC members, designated and alternate members,agency staff, and interested parties for meeting notification.Groundwater Protection PolicySection 26.401 of the <strong>Texas</strong> Water Code establishes the state’s <strong>groundwater</strong> protection policy. The policysets out nondegradation of the state's <strong>groundwater</strong> resources as the goal for all state programs. The policyrecognizes the variability of the state's aquifers, the importance of maintaining water quality for existing andpotential uses, the protection of the environment and the public health and welfare, and the maintenance andenhancement of the long-term economic health of the state. Further, the policy recognizes that <strong>groundwater</strong>contamination may result from many sources, including current and past oil and gas production and relatedpractices, agricultural activities, industrial and manufacturing processes, commercial and business endeavors,domestic activities, and natural sources that may be influenced by, or may result from, human activities. Theuse of the best professional judgement by the responsible state agencies in attaining the goal and policy isalso recognized.The policy states that discharges of pollutants, disposal of wastes, and other regulated activities be conductedin a manner that will maintain present uses and not impair potential uses of <strong>groundwater</strong> or pose a publichealth hazard. The programs of the various state agencies are generally administered to attain this goal. Thestate’s <strong>groundwater</strong> protection policy is included in Appendix 2.Groundwater Classification SystemThe <strong>Texas</strong> Groundwater Protection Committee and its member agencies recognize that <strong>groundwater</strong>classification is an important tool to be used in the implementation of the state's <strong>groundwater</strong> protectionpolicy. Through classification, the <strong>groundwater</strong>s in the state can be categorized and protection or restorationmeasures can then be specified by member agencies according to the quality and present or potential use ofthe <strong>groundwater</strong>.The TGPC has developed a <strong>groundwater</strong> classification system for use by state agencies. Four <strong>groundwater</strong>classes are defined based on quality as determined by total dissolved solids (TDS) content. The names andconcentration ranges are based on traditional nomenclature associated with each class. Fresh <strong>groundwater</strong> isclassified as having a TDS concentration range from zero to 1,000 milligrams per liter (mg/L); slightly saline13

<strong>groundwater</strong>, a TDS concentration range from 1,000 to 3,000 mg/L; moderately saline <strong>groundwater</strong>, a TDSconcentration range from 3,000 to 10,000 mg/L; and very saline <strong>groundwater</strong> to brine, a TDS concentrationgreater than 10,000 mg/L. Quality also determines usability; however, it is implicit in the classification that awater-bearing zone must be able to produce sufficient quantities of water to meet its intended use. TheGroundwater Classification System adopted by the TGPC is given in Appendix 3.The <strong>groundwater</strong> classification system is applicable to all <strong>groundwater</strong>s in the state. In assigning aclassification, the member agencies attempt to use the natural quality of the <strong>groundwater</strong> that is unaffected bydischarges of pollutants from human activities. All usable and potentially usable <strong>groundwater</strong>s are subject tothe same protection provided by the state's <strong>groundwater</strong> protection policy. Starting with the nondegradationgoal, protection or restoration measures can be varied according to the response level set by the classificationso long as the following conditions are met:< Current <strong>groundwater</strong> uses are not impaired;< Potential <strong>groundwater</strong> uses are not impaired;< A public health hazard is not created; and< The quality of <strong>groundwater</strong> is restored if feasible.In determining protection or restoration measures, an agency would consider all present or potential beneficialuses of <strong>groundwater</strong> of a given quality. Generally, drinking water for human consumption would require thehighest degree of <strong>groundwater</strong> protection or restoration. Protection for this use will also be protective of allother current or potential uses in almost all circumstances. These considerations facilitated defining tworesponse levels for purposes of assigning protection or restoration measures that are commensurate with thepotential to impact human health and the environment.< Level I response for the fresh, slightly saline and moderately saline classes should be based on thecurrent or potential use as a human drinking water supply.< Level II response for the very saline to brine class should be based on indirect exposure (i.e., bymeans other than drinking) or no human consumption.In specifying a protection or restoration measure, member agencies should apply best professional judgementon a case-by-case basis. Evaluations to be made include, but are not limited to, such factors as productivity,the availability of alternate sources of water, background concentrations of naturally occurring constituents,the effects of constituents on usability, traditional and potential beneficial uses of the water, economic andtechnical feasibility of treatment, and projected needs for and types of impacts on these <strong>groundwater</strong>s.The classification system is intended to be implemented by member agencies as an integral part of their<strong>groundwater</strong> protection programs. In addition to its response-setting function, the classification systemfosters consistency among the various programs.Risk-Based Cleanup LevelsThe state's policy on <strong>groundwater</strong> contamination states that water quality be restored if feasible (Appendix2). The determination of feasibility examines the adequacy of remediation or <strong>groundwater</strong> cleanuptechnologies, and the economic costs of remediating contaminated <strong>groundwater</strong> to its original condition.Technical feasibility issues include the ability to completely withdraw the affected <strong>groundwater</strong> and the14

ability to remove or treat all contaminants to background concentrations. Economic feasibilities include thehigh cost of sophisticated treatment technologies and the long time periods required to retrieve the affected<strong>groundwater</strong> for treatment. In many cases contaminated <strong>groundwater</strong> cannot be restored to its original quality,and significant costs are incurred at many sites in the recovery and treatment of <strong>groundwater</strong>. It may not betechnically possible or cost-effective in all cases to clean <strong>groundwater</strong> to its original quality.Recognizing this situation, the state's policy requires that <strong>groundwater</strong> be kept reasonably free ofcontaminants that would interfere with present uses or impair future uses of <strong>groundwater</strong>. In response, theTNRCC has developed an approach which focuses on protection of <strong>groundwater</strong> for high quality uses,including human health, and which addresses the cost of available remediation technologies. The TNRCC,which has primary jurisdiction for the regulatory protection of <strong>groundwater</strong>, is implementing a risk-basedapproach in setting cleanup levels that is based on sound science, flexibility, and common sense.This risk-based approach takes into consideration the actual or reasonable potential for public andenvironmental exposure to contaminants in the determination of the timing, type, and degree of siteremediation. Risk assessment is the process used to quantify the potential adverse effects to human health dueto exposure to chemicals. A risk assessment process was first proposed by the National Academy of Sciencein the 1983 publication: Risk Assessment in the Federal Government: Managing the Process. The basicprocess proposed by the National Academy of Science is the foundation for most published risk assessmentguidance documents developed by state and federal regulatory agencies.The risk assessment process consists of four steps: hazard identification, dose-response assessment,exposure assessment, and risk characterization. The objective of hazard identification is to determine whetherthe available chemical-specific scientific data describe a causal relationship between exposure to the chemicaland adverse human health effects. The dose-response assessment quantifies the relationship between the dose(amount of chemical that the organism is exposed to) and the response (adverse health effects). The objectiveof the exposure assessment is to analyze site-specific information to estimate the most likely dose to potentialhuman receptors. The risk characterization uses information from the previous three steps to estimate adversehuman health effects. The risk characterization answers the question "How much risk does the situationpose?" This is followed by the risk management step which answers the question "What should be done withthe risk that has been quantified?"Depending on the level of the risk and the current regulatory policies, risk management may involve noaction,engineering solutions such as soil and <strong>groundwater</strong> remediation, or institutional controls such as deedrestrictions or limiting access to the site. Thus, risk-based decision-making can be protective of human healthand the environment, and offers a scientifically sound and administratively effective way to respond to thepressures for timely action at large numbers of sites and the efficient use of both public and private resources.The TNRCC's Office of Waste Management has incorporated risk-based corrective action into its rules andpolicies.The Groundwater Classification System has been incorporated into rules of the industrial solid wasteprogram of the Industrial and Hazardous Waste Division and the Pollution Cleanup Division of the TNRCCfor closures and remediations of hazardous and non-hazardous waste sites and areas of contamination. Therules, known informally as the Risk Reduction Rules, were promulgated in Title 30, <strong>Texas</strong> AdministrativeCode, Chapter 335, Subchapters A and S, with an effective date of June 28, 1993. These rules specify threerisk reduction standards, or levels of cleanup, for contaminated media including <strong>groundwater</strong>.Standard 1 calls for cleanup to background conditions regardless of the <strong>groundwater</strong> classification. Standards2 and 3 allow for consideration of the potential use of <strong>groundwater</strong> as a human drinking water resource based15

on Total Dissolved Solids (TDS) concentration. Cleanup levels are initially based on human health criteria orpromulgated drinking water standards for <strong>groundwater</strong> with a background TDS concentration less than10,000 milligrams per liter, consistent with the classification. Other considerations specified in the rules canadjust these levels, taking into account ecological impacts or ingestion rates reflecting residential or industrialexposure. For example, the point of exposure where <strong>groundwater</strong> would be pumped from a well, is set at thewaste unit for Standard 2, but can be varied for Standard 3. Standard 3 utilizes an alternate concentrationlimit determined by site-specific considerations. In both Standards 2 and 3, phase-separated liquids such asgasoline must be removed or decontaminated to the extent practicable, and effects of contaminant migrationto surface water or other drinkable <strong>groundwater</strong> resources must be evaluated. If the salinity of the<strong>groundwater</strong> exceeds the TDS threshold, cleanup levels are based on criteria other than human healthprotection.The Groundwater Classification System has also been incorporated into the regulations and the guidancedocument of the Petroleum Storage Tank Division of the TNRCC. The regulations and guidance are used forestablishing target cleanup goals for site closure and remediation of leaking aboveground and undergroundstorage tank sites. The rules, effective as of November 8, 1995, can be found in Title 30, <strong>Texas</strong>Administrative Code, Chapter 334, Subchapter G (Target Concentration Criteria). Rule guidance, Risk-Based Corrective Action for Leaking Storage Tank Sites, was published in January 1994 (TNRCCRegulatory Guidance RG-36). The rules and guidance specify two risk-based plans, or levels of cleanup, forcontaminated media including <strong>groundwater</strong>.Plan A and Plan B allow consideration of the potential use of <strong>groundwater</strong> as a human drinking waterresource based on TDS concentration and production potential. However, in contrast to the risk reductionrules, heavily weighted factors in determining target cleanup goals are the traditional demonstrated beneficialuse of the affected water-bearing zone and the actual TDS of the <strong>groundwater</strong> when less than 10,000milligrams per liter (mg/L). Cleanup levels are initially based on human health criteria or promulgateddrinking water standards for <strong>groundwater</strong> with a background TDS concentration less than 10,000 mg/L,consistent with the classification. Other considerations specified in the guidance can adjust these levels,taking into account proximity to water wells and other receptors, ecological impacts, or ingestion ratesreflecting residential or industrial exposure. For example, the point of exposure where <strong>groundwater</strong> would bepumped from a well is set at the source area for Plan A, but can be varied for Plan B. Plan B utilizes analternate concentration limit determined by site-specific considerations. In all cases, phase-separated liquidssuch as gasoline must be removed or decontaminated to the extent practicable and effects of contaminantmigration to surface water or other drinkable <strong>groundwater</strong> resources must be evaluated. If the salinity of the<strong>groundwater</strong> exceeds the TDS threshold, cleanup levels are based on criteria other than human healthprotection.The adoption of the existing Risk Reduction Rules in 1993 and the PST risk-based rules in 1995 establishedthe TNRCC’s philosophy that risk-based cleanups are an acceptable remedial response to affectedenvironmental media because risk-based corrective action ensures protection of human health and theenvironment while making response actions more economically feasible than complete, or background,cleanups. The TNRCC initiated a new rulemaking, the <strong>Texas</strong> Risk Reduction Program (TRRP), in 1995 asthe next logical step in the development of a risk-based program. The TRRP will establish a uniform set ofrisk-based performance-oriented technical standards to guide response actions at affected properties regulatedvia the agency's Office of Waste Management program areas and other applicable program areas, and will bepromulgated as new 30 <strong>Texas</strong> Administrative Code, Chapter 350. The goals of the new program are: (1) tocreate a unified performance-based approach to corrective action which will be the same regardless of whichof the agency's program areas reviewed the adequacy of a proposed response action; (2) to complete themovement away from background as a cleanup standard; and (3) to implement a consistent, streamlined16

approach that will expedite remediations of affected properties. The TNRCC also seeks to address in theproposed rule a substantial number of technical, legal, risk assessment, and risk management policy questionswhich have arisen and were unaddressed in the previously promulgated risk-based rules. Rules wereproposed in April 1998, with final rules becoming effective toward the end of 1998.Groundwater ContaminationThe definition of <strong>groundwater</strong> contamination adopted by the TGPC (Title 31, <strong>Texas</strong> Administrative Code,§601.3) for use in this <strong>report</strong> is given in Appendix 4, <strong>Texas</strong> Groundwater Protection Committee Rules, and isparaphrased as follows:Groundwater Contamination - The detrimental alteration of the naturally occurring physical, thermal,chemical, or biological quality of <strong>groundwater</strong>. Further, <strong>groundwater</strong> contamination, for purposes ofinclusion of cases in the public files and the <strong>joint</strong> <strong>groundwater</strong> monitoring and contamination <strong>report</strong>,shall be limited to contamination reasonably suspected of having been caused by activities of entitiesunder the jurisdiction of the agencies identified in the <strong>Texas</strong> Water Code §26.406, TGPC rules, andsubsequent legislative amendments. Reported contamination cases are generally limited to thoseaffecting usable quality <strong>groundwater</strong> (less than 10,000 milligrams per liter of dissolved solids).The first sentence of the definition is based upon the definition of pollution given in §26.001 of the <strong>Texas</strong>Water Code, and suggests that in identifying contamination, the quality of <strong>groundwater</strong> must be altereddetrimentally. The definition implies that a comparison can be made between known background or naturalwater-quality conditions and a sampling event which indicates the presence of a contaminant not occurringnaturally, or a naturally occurring constituent in amounts or a concentration greater than its naturallyoccurring concentration. The definition then limits the scope of contamination to activities of entities underthe jurisdiction of the agencies participating in the preparation of this <strong>report</strong>. This limitation excludesnaturally occurring saline or highly mineralized water and the intrusion of these waters into usable quality<strong>groundwater</strong> resources. The contamination cases identified in this <strong>report</strong> are primarily those wherecontaminants have been discharged to the surface, to the shallow subsurface, or directly to <strong>groundwater</strong> fromactivities such as the storage, processing, transport, or disposal of products or waste materials.<strong>Texas</strong> Water Code, §26.406, requires the listing and description of documented cases of <strong>groundwater</strong>contamination reasonably suspected of having been caused by activities under the jurisdiction of stateagencies with <strong>groundwater</strong> protection programs. While the definition of <strong>groundwater</strong> contamination isbroadly interpreted to encompass a large universe of identified cases, the documentation of <strong>groundwater</strong>contamination should be considered more carefully in order to assure accuracy and fairness in <strong>report</strong>ingimpacts to <strong>groundwater</strong> resources. Documentation of contamination requires an evaluation of the significanceof the data, the reliability of the data, and proper interpretation of the data.Information and analyses of <strong>groundwater</strong> conditions should be representative of the actual conditions at thesite. The data must be adequate to justify conclusions or further actions with regard to documentingcontamination. Conditions which should be considered include whether a well is completed in more than oneaquifer, whether a contaminant is present in the aquifer, or whether a contaminant has been introduced intothe well from the surface. These factors are regarded as necessary and are incorporated into the design ofmonitoring programs and sampling procedures for each regulatory program. These factors are also importantfor ambient <strong>groundwater</strong> monitoring program design.17

Groundwater information, especially analytical data, must be of reliable quality. A <strong>groundwater</strong> sample issubject to inadvertent alteration at many points from its removal at the well to its final laboratory analysis. Itis important that reliable, verifiable procedures be used for sampling, handling, and laboratory analysis.Verification of analytical results is often desirable before concluding that contamination has occurred.Verification procedures include resampling and splitting samples with other entities for comparison ofanalytical results.Proper interpretation of information and analytical data is essential to the goal of documenting <strong>groundwater</strong>contamination. Comparison of sampling results to known background water quality is often necessary todetermine if contamination has occurred. Some compounds, such as refined gasoline or synthetic organiccompounds, are not naturally occurring and their presence in detrimental amounts constitutes contamination.Other constituents such as sodium, chloride, and nitrate are naturally occurring and a comparison to knownbackground water quality is necessary to determine whether contamination has occurred.As noted earlier, the occurrence of highly mineralized <strong>groundwater</strong> or the <strong>report</strong>ing of significantconcentrations of dissolved solids and certain other naturally occurring constituents from <strong>groundwater</strong>monitoring programs does not, of itself, constitute <strong>groundwater</strong> contamination. Many aquifers contain watercategorized as slightly saline to very saline, ranging from 1,000 milligrams per liter (mg/L) of dissolvedsolids to 10,000 mg/L and greater. Mineralized waters are the result of natural hydrogeologic processesinvolving restricted circulation, chemical reactivity, and residence time. These conditions exist in many areasof the state and wells producing poor quality waters are common.Notification of Groundwater ContaminationWater-quality monitoring and <strong>report</strong>ing requirements addressing unauthorized discharges are generallydescribed in rules specific to the activity being regulated. The <strong>report</strong>ing requirements are also generallyprogram specific. Program-specific <strong>groundwater</strong> monitoring requirements are discussed further under each ofthe agency or program headings in the section entitled Groundwater Protection Program Descriptions.Unauthorized discharges to water in the state, including <strong>groundwater</strong>, from regulated activities under theTNRCC’s jurisdiction are prohibited (<strong>Texas</strong> Water Code, §26.121). Numerous state and federal laws eitherrequire monitoring of <strong>groundwater</strong> quality and notification to regulatory entities when such monitoringindicates an unauthorized discharge has impacted <strong>groundwater</strong> or, direct the TNRCC to adopt requirementsfor monitoring and notification.<strong>Texas</strong> Water Code, §5.103 provides the TNRCC with the authority to adopt any regulation necessary to carryout its powers and duties under the <strong>Texas</strong> Water Code and other laws of the state. In addition, §26.042 of the<strong>Texas</strong> Water Code authorizes the TNRCC to prescribe reasonable requirements for regulated activities whichmanage waste discharges to monitor and <strong>report</strong> on waste collection, treatment, and disposal activities. Suchregulatory activities are required by rule, permit, or order issued by the TNRCC. When significant waterqualitymanagement benefits will result or water-quality management needs justify, the TNRCC may alsoprescribe reasonable requirements to monitor and <strong>report</strong> on the quality of any water in the state which theTNRCC has reason to believe may be adversely affected by waste discharges.18

Reporting Unauthorized Discharges and SpillsThe TNRCC is the state's lead agency for the response to all hazardous substance discharges or spills, anddischarges or spills of other substances and certain inland oil discharges or spills which may cause pollution.This authority is derived from §26.039 and §§26.261 through 26.268 of the <strong>Texas</strong> Water Code (<strong>Texas</strong>Hazardous Substances Spill Prevention and Control Act). Pursuant to §26.039 (b), whenever an accidentaldischarge or spill occurs at or from any activity or facility which causes or may cause pollution, the individualoperating, in charge of, or responsible for the activity or facility shall notify the TNRCC as soon as possibleand not later than 24 hours after the occurrence. Section 26.039 (a) defines an accidental discharge as an actor omission through which waste or other substances are inadvertently discharged into water in the state. Itfurther defines a spill as an act or omission in which waste or other substances are deposited where, unlesscontrolled or removed, they will drain, seep, run, or otherwise enter water in the state.The TNRCC adopted Spill Prevention and Control Rules, with changes, on April 24, 1996. The final ruleswere filed with the <strong>Texas</strong> Register on May 14, 1996, and became effective May 23, 1996. A <strong>report</strong>abledischarge or spill is an unauthorized accidental discharge or spill of oil, petroleum product, used oil,hazardous waste, industrial solid waste, or other substances into the environment in a quantity equal to orgreater than a <strong>report</strong>able quantity as defined in the rules. Upon the determination that a <strong>report</strong>able dischargeor spill has occurred, the responsible person must notify the TNRCC as soon a possible but no later than 24hours after its discovery. A summarization of the TNRCC’s Spill Prevention and Control Rules is given inAppendix 5.The Railroad <strong>Commission</strong> of <strong>Texas</strong> (RCT) is generally the agency to respond for discharges or spills fromactivities associated with the exploration, development, or production, including storage or transportation, ofoil, gas, and geothermal resources (<strong>Texas</strong> Natural Resources Code, §§85.042, 91.101, and 91.601).Discharges or spills from brine mining or surface mining are also under the jurisdiction of the RCT.In general, the RCT has jurisdiction over discharges or spills associated with the transportation of crude oilprior to refining of the oil and of natural gas prior to its use in a manufacturing process or as a residential orindustrial fuel. As a result, discharges or spills from crude oil or natural gas pipelines are under thejurisdiction of the RCT. However, discharges or spills from pipelines transporting refined products such asgasoline, diesel, or other fuel oils fall under the regulatory jurisdiction of the TNRCC, and the SpillPrevention and Control Rules should be followed. As specified under the State of <strong>Texas</strong> Oil and HazardousSubstances Spill Contingency Plan, the TNRCC serves as the lead agency in directing and approving theresponse for the discharge or spill of a harmful quantity of crude oil (defined as five or more barrelsdischarged or spilled on the ground or any quantity discharged or spilled into water) during highway or railtransportation.19

Reporting Historic ContaminationThe TNRCC’s notification requirements under the Spill Prevention and Control Rules are not applicable tocases of historic contamination. Historical contamination is not considered attributable to any presentlyoccurring or known discharge or spill incident. Based upon a number of inquiries and requests, the TNRCCbelieves there is a need to document the location and nature of historical contamination discovered duringroutine site assessments and any other investigation that documents contamination on land or to water(including <strong>groundwater</strong>). The TNRCC wishes to maintain a clear distinction and prevent duplication of effortbetween addressing ongoing discharges or spills requiring immediate response and cleanup to remove orprevent contamination from entering surface or <strong>groundwater</strong>s, and addressing <strong>report</strong>s of historicalcontamination that are not an immediate threat to surface or <strong>groundwater</strong>s.It is recommended that the person or entity discovering historical contamination submit written notification tothe appropriate TNRCC Regional Manager (Appendix 6) and the Emergency Response Manager (at MC-142, P.O. Box 13087, Austin, <strong>Texas</strong> 78711-3087) within 10 working days of discovery. Discovery ofhistorical contamination can occur either through observation or through receipt of analytical sampling data.It is suggested notification include the address and exact location of historical contamination, the date andmethod of discovery, the nature of the historical contamination, an estimate of the extent of contamination,possible sources if any can be determined, the current property owner and/or operator of the site of thecontamination and any other appropriate information. In the determination that the discovery of historicalcontamination indicates the presence of imminent and substantial endangerment, the appropriate TNRCCRegional Manager (Appendix 6) and the Emergency Response Center (at 512/463-7727) should be contactedwithin one hour.Public InformationThe purpose of this document is to compile and make available to the public an annual <strong>report</strong> which providesthe status of <strong>groundwater</strong> monitoring associated with the activities regulated by the contributing stateagencies. The <strong>report</strong> further provides an annual status of documented <strong>groundwater</strong> contamination, includingnew cases and previous cases still undergoing enforcement actions, reasonably suspected of having beencaused by activities regulated by the state agencies. Tables 1 through 3 provide a summarized tabulation ofall <strong>groundwater</strong> contamination cases documented or under enforcement during 1997. Limited informationpertaining to specific contamination cases listed in this <strong>report</strong> may be available by contacting appropriateagency personnel as listed in Appendix 7.Each agency, or more specifically, individual programs within an agency, may be required by statute, rule, orpolicy to provide notification of <strong>groundwater</strong> contamination once it has been confirmed through <strong>groundwater</strong>studies or validation of analyses. Notification may be required within a program to assorted individuals whichmay include local officials and health officers; public water suppliers and water well drillers; complainants; oraffected, or possibly affected, parties. Such requirements are commonly based on the need to minimizepotential adverse impacts to public health.Regulatory Notification to Local OfficialsSection 5.236 of the <strong>Texas</strong> Water Code requires the TNRCC to provide notice to local officials regarding<strong>groundwater</strong> contamination which may affect drinking water supplies in their area. Notification is provided to20

county judges and county health entities to supply information on <strong>groundwater</strong> impacts to drinking watersupplies within the county. Typically, these cases are identified in the <strong>report</strong> only during the year the case was<strong>report</strong>ed as new.The identified cases requiring notification under §5.236 are indicated in the field "SECTION 5.236" in theTNRCC’s <strong>groundwater</strong> contamination case table (Table 1). There are twenty §5.236 cases listed in this<strong>report</strong>. In previous <strong>report</strong>s prepared by the TGPC, a total of 640 §5.236 cases have been identified (listed asHB 938 cases prior to 1995); 16 in 1996, 15 in 1995, 42 in 1994, 15 in 1993, 41 in 1992, and 507 in 1991.The large number of §5.236 cases listed in the 1991 <strong>report</strong> included all such cases identified up to March 31,1992.State Agencies' Files<strong>Texas</strong> Water Code, §26.406 requires that the state agencies identified as having <strong>groundwater</strong> protectionresponsibilities maintain a public file of all documented cases of <strong>groundwater</strong> contamination. Each stateagency has its own location and specific procedures for maintenance and accessibility of information relatedto <strong>groundwater</strong> contamination cases. Each regulatory program within an agency may have a unique systemfor maintenance and identification of information related to contamination cases. Information on agency filesfor each program with <strong>groundwater</strong> contamination cases tabulated within this <strong>report</strong> are provided inAppendix 8 (Agency Central Records Locations). This information is a matter of public record and isavailable for public review by arrangement with each agency. In some situations, the availability ofinformation for certain enforcement actions may be limited or subject to specific access procedures. Inaddition, agency district and regional office locations are given in Appendix 6 and agency and districtcontacts are listed in Appendix 7.Other Reports and PublicationsThere are numerous water-agency publications which address <strong>groundwater</strong> contamination in the state. Thesepublications provide a different focus or perspective on <strong>groundwater</strong> quality conditions and presentinformation not contained within this <strong>report</strong>. Other publications provide information on statewide<strong>groundwater</strong> protection efforts and specific protection programs. Brief descriptions of several of thesepublications are provided in Appendix 9.There are eight predecessors to this Joint Groundwater Monitoring and Contamination Report. These<strong>report</strong>s, which cover calendar years 1989 through 1996, were produced annually by the TGPC and publishedby the TNRCC (and its predecessor agency, the <strong>Texas</strong> Water <strong>Commission</strong>). These <strong>report</strong>s provide abackground on the evolution of the state’s <strong>groundwater</strong> protection programs. The <strong>report</strong>s may also provideinsight to historical cases of contamination (cases which are no longer listed).The State of <strong>Texas</strong> Water Quality Inventory - 13th Edition (TNRCC, 1996) describes the conditions of thestate’s surface and <strong>groundwater</strong> quality. The state’s <strong>groundwater</strong> protection program is described and themajor documented and potential sources of <strong>groundwater</strong> contamination are identified.The Annotated Bibliography of <strong>Texas</strong> Water Resources Reports of the <strong>Texas</strong> Water Development Boardand the United States Geological Survey through August 1974 (TWDB, 1976) lists, with a brief summary,21

state and federal agency water-related publications. A large number of these publications address historic<strong>groundwater</strong> contamination investigations.The publication Water for <strong>Texas</strong>: Today and Tomorrow. A Consensus-Based Update to the State WaterPlan (TWDB, 1997) presents statewide water planning information, issues, and goals. This coordinatedeffort between the TWDB, the TNRCC, and the <strong>Texas</strong> Parks and Wildlife Department has provided a clearperspective of the state’s long-term water needs.22

USER’S GUIDEThe remaining portion of the <strong>report</strong> is divided into two sections. The first section, Groundwater ProtectionProgram Descriptions, provides a narrative, program-specific overview for each contributing agency ororganization. The second section, Groundwater Contamination Case Descriptions, contains a tabular listingof individual contamination cases which were documented or under enforcement for calendar year 1997.Appendices are included at the end of the <strong>report</strong>, providing more detailed information supporting orsupplementing the main body of the <strong>report</strong>.Groundwater Protection Program Descriptions. In this section, the specific regulatory programs of eachagency are described in terms of the activity or activities regulated, the standards and approvals required,monitoring of the regulated entity's compliance with the conditions of approval, monitoring of <strong>groundwater</strong> todetect problems, and actions required if <strong>groundwater</strong> contamination is discovered at a site or facility.The status of each program's required <strong>groundwater</strong> monitoring is described and includes comments on qualityassurance policies and procedures and the number of facilities that are required to perform monitoring. Thestatus of <strong>groundwater</strong> contamination is described, and the information contained in the case description tablefor each agency is summarized. Finally, special notes or comments specific to each program may be includedfor additional clarification.Groundwater Contamination Case Descriptions. This section contains the individual <strong>groundwater</strong>contamination case descriptions for each contributing agency with regulatory <strong>groundwater</strong> protectionauthority. Each agency’s table lists contamination cases by county and contains eight fields (columns) of dataspecific to each case.Rules and Definitions Related to ReportCompilation<strong>Texas</strong> Water Code, §26.406, authorized the TGPC to adopt rules defining the conditions that constitute<strong>groundwater</strong> contamination for the purpose of inclusion of cases in its annual monitoring and contamination<strong>report</strong> (Appendix 4). The TGPC adopted rules (Title 31, <strong>Texas</strong> Administrative Code, §§601.1 through601.5) on March 5, 1991, defining certain terms and conditions that constitute <strong>groundwater</strong> contaminationfor the purpose of the <strong>report</strong>. The TGPC rules became effective on March 29, 1991, adopted without changesfrom the proposed rules (published in the January 22, 1991 <strong>Texas</strong> Register).It was necessary to define <strong>groundwater</strong>, <strong>groundwater</strong> contamination and enforcement action in broad terms sothat the varying jurisdictional abilities and programs of the contributing agencies could be compiled in similarformats and compared. Broad definitions also enable the <strong>report</strong> to include the largest possible universe ofdocumented contamination from man-induced activities.< Groundwater is defined as water existing below the land surface in a zone of saturation, that is, the waterwhich completely fills the interconnected pore spaces of the rock or sediment.23

Groundwater contamination is defined as any detrimental alteration of the naturally occurring quality of<strong>groundwater</strong>. It is limited, however, to contamination suspected of being associated with activities underthe jurisdiction of the contributing agencies and affecting usable quality <strong>groundwater</strong>.< Enforcement action is defined very broadly to include any action of an agency which accomplishes orrequires the identification, documentation, monitoring, assessing, or remediation of <strong>groundwater</strong>contamination.Using the Contamination Case Description TablesThe <strong>groundwater</strong> contamination case descriptions are presented in a tabular format for contributing agencieswith enforcement authority over current <strong>groundwater</strong> contamination cases. The regulatory protection of<strong>groundwater</strong> is primarily the responsibility of the TNRCC. Certain activities requiring the regulatoryprotection of <strong>groundwater</strong> are under the jurisdiction of the Railroad <strong>Commission</strong> of <strong>Texas</strong>, the <strong>Texas</strong>Department of Agriculture, and the <strong>Texas</strong> State Soil and Water Conservation Board. The <strong>Texas</strong> Alliance ofGroundwater Districts has no regulatory or enforcement authority as an organization, but individual<strong>groundwater</strong> conservation districts may have limited authority for action with regard to <strong>groundwater</strong>contamination.Groundwater contamination case descriptions for the TNRCC, Railroad <strong>Commission</strong> of <strong>Texas</strong>, and memberdistricts of the <strong>Texas</strong> Alliance of Groundwater Districts are listed in Table 1 through Table 3, respectively.No contamination cases were <strong>report</strong>ed or under enforcement by the <strong>Texas</strong> State Soil and Water ConservationBoard or by the <strong>Texas</strong> Department of Agriculture in 1997.Locating Specific CasesThe first page of each agency’s table contains a legend of the column headings and a brief description of eachheading. The legend describes attributes that may be unique to that particular table; however, some of theheading descriptions repeat the field definitions given in this section. The contamination cases are groupedaccording to the county in which the contamination site is located, with a secondary grouping according todivision or specific regulatory program within an agency.To find a specific contamination case, locate the county of interest in the far left portion of the table. For thatagency, all documented contamination cases for that county are listed under the respective division orregulatory program heading which has jurisdiction over that case. Under each division heading, contaminationcase descriptions are listed in alphabetical order according to file names. Check each division or regulatoryprogram heading for the desired contamination case description. Also, check the other agency tables for thedesired contamination case descriptions for the county of interest. A location reference is provided in thetables under the field heading LOCATION and can be used to locate a specific case if the file name isunknown.24

Figure 3. Contamination Case Descriptions/Data FieldsData Field NameNew CasesFile NameFile NumberLocationContaminationDescriptionDateData Field DescriptionAn asterisk denotes each case that was not listed in the previous year’s <strong>report</strong>.Consists of: company names, cities, persons, or other entities considered potentiallyresponsible parties or otherwise associated with the case. File names may also consistof geographic location names or well numbers.Identification number assigned to the case by the numbering system used by theagency or program with jurisdiction for the case. 1Location references. Most location descriptions refer to cities and addresses, othersare geographic locations using distances from known points.Consists of a listing of contaminants (such as "gasoline" or "creosote constituents").Abbreviations, explained at the beginning of each table, may also be used.The earliest date of contamination confirmation at the site by the jurisdictional agencyor program. More detail on the significance of this field is given at the beginning ofeach table if the date represents something other than the above definition.Enforcement A two-to-four character code representing the status of the case with respect toStatus agency enforcement action and contamination site activity. 2Data QualitySection 5.236A code (up to 6 characters) describing reliability of analytical data used by eachregulatory agency to analyze the case. Addresses field and laboratory qualityassurance procedures and data reliability and quality in determining conclusions foreach case.Included in Table 1 (only) to distinguish cases subject to notification requirementsunder §5.236 of the <strong>Texas</strong> Water Code. A "Y" code identifies cases in which3contamination has or may potentially affect a public drinking water supply. The "Y"code appears only in the <strong>report</strong> in which the case is listed as a new case (casesrequiring such notification identified in previous <strong>report</strong>s are not duplicated in this<strong>report</strong>).123File numbers can be used to access the files of the regulating agency to obtain data on each <strong>groundwater</strong>contamination case listed in Tables 1 through 3. Cases without file numbers may be accessed in theregulating agencies' files with the case file name.Some agencies do not have complete status codes due to insufficient data. Additionally, the regulatoryagencies <strong>report</strong>ing the contamination cases have procedures and internal structures that differ fromagency to agency. This makes it difficult to categorize enforcement or activity status under a generaldescription scheme. A more detailed explanation is given in the following section entitled EnforcementStatus Matrix.An entry in this field constitutes secondary notification from the TNRCC to local officials for cases<strong>report</strong>ed since the issuance of the previous <strong>report</strong>.25

Data FieldsThere are eight fields (columns) of data in the tables used to describe the <strong>groundwater</strong> contamination cases.The data fields are: NEW CASES, FILE NAME, FILE NUMBER, LOCATION, CONTAMINATIONDESCRIPTION, DATE, ENFORCEMENT STATUS, and DATA QUALITY. In addition, the TNRCC table(Table 1) has an extra field SECTION 5.236 to indicate cases which meet the criteria of <strong>Texas</strong> Water Code,§5.236. The data fields are described in Figure 3.Enforcement Status MatrixThis <strong>report</strong> is required by §26.406 of the <strong>Texas</strong> Water Code to indicate the status of enforcement action foreach case of <strong>groundwater</strong> contamination. For purposes of this <strong>report</strong>, enforcement action includes any agencyaction which accomplishes or requires the identification, documentation, monitoring, assessing, orremediation of <strong>groundwater</strong> contamination. However, the objectives of enforcement action and the means bywhich enforcement is conducted vary among the regulatory programs.To describe only an agency's enforcement action presents a minimal observance of the regulatoryundertaking. Enforcement is ineffective if required actions to address the assessment andmitigation of the contamination incidents are not carried out. Therefore, agency actions dealing withcontamination incidents are also placed in context of the activities necessary to confront the incidents. Thiscomparison of the level of agency action and the status or level of contamination assessment and mitigation ispresented in the enforcement status matrix (Figure 4).The enforcement status matrix allows a one-to-one correspondence between an agency's response and thecompletion of the discrete phases in the progression of contamination investigation. The vertical (Y) axis ofthe matrix gives the level of agency response (enforcement status), and corresponds to the first number givenin the ENFORCEMENT STATUS field in the table. The horizontal (X) axis gives the level or status ofcontamination site activity (activity status), and corresponds to the second number in the ENFORCEMENTSTATUS field in the table.Different circumstances at the same level of agency response or the same level of contamination site activitycan be indicated using an alphabetical code associated with each of the two numerical codes. These codes(YA,XA), presenting the enforcement status, followed by the activity status, are tabulated for eachcontamination case listed in this <strong>report</strong>.Once familiar with the matrix, a reader should be able to quickly discern the status of an incident and relateits progress in the respective regulatory program to all other incidents. The matrix can also summarize thestatus of all incidents by showing how many occur in each grid of the matrix. Each agency table is followedby an Enforcement Status Summary, which consists of an enforcement status matrix summarizing casesfalling in each gridspace. In addition, each table is accompanied by a statewide map showing the number of<strong>groundwater</strong> contamination cases, by county.26

Figure 4. Enforcement Status MatrixA Federal STATE/FED FUNDS 5B StateA AG Office COURT/FED ACTION E 4B FederalA PermitB Order EXECUTIVE ACTIONNFORCE 3C Exec ActionD Fed ReferralA Info RequestB Plan Approval STAFF ACTIONMENTS 2C Notice of ContaminationD ReferredCONFIRMED-A Inspection STAFF DISCOVERYTATUS1B Data ReviewC ComplaintD ReferralA Voluntary Complianceand Notification VOLUNTARY ACTION 0B Voluntary Entrance intoCleanup Program0 1 2 3 4 5 6ACTIVITY STATUSNo Activity Contamination Investigation Corrective Implement Monitor Action ActionConfirmed Action Planning Action Completed* * *A Action A Action A RemediationB No Action B No Action B Source RemovalC No Further Action NeededD Institutional ControlsE Engineering Controls27

Enforcement Status CodesIn general, regulatory programs are structured to achieve the desired degree of environmental protection andmitigation with the lowest possible level of agency oversight. Routine monitoring is an example of this typeof oversight activity. When monitoring or other activities indicate that greater agency involvement isnecessary to address a contamination case, the agency may be forced to take enforcement actions.Enforcement status codes are described in Figure 5. The enforcement status codes are ordered to reflect theprogression of enforcement actions available to most of the agencies.Figure 5. Enforcement Status Matrix/Enforcement Status CodesCode Enforcement Description0 Voluntary An entity addresses the contamination incident, without being compelled toAction do so by enforcement action, and either A) <strong>report</strong>s its actions to the agency,or B) enters into an agency’s voluntary cleanup program.1 Staff Discovery The agency confirms identification of a contamination incident through itsactivities, such as: A) inspections, B) reviews of self-<strong>report</strong>ed data, C)complaints received, or D) referrals received from other agencies.2 Staff Action The agency initiates an action to address a contamination incident, such as:A) an information request of the entity, B) approval of a work plan (e.g.,assessment, corrective action, etc.), C) sending a notice of contamination toaffected parties, or D) referring the incident to another agency withjurisdiction.3 Executive Action Action at the highest level of the agency, such as: A) issuing a permit withcorrective action provisions; B) issuing an administrative order; C) otherexecutive level action such as letter of approval or revocation, orconditional or final release of liability; or, D) referral to federal authoritiessuch as U.S. EPA.4 Court or Federal When other options fail or do not apply, an agency can: A) seek legalAgency Action representation by the <strong>Texas</strong> Attorney General before the courts, or B) letfederal agencies seek resolution according to federal laws or programs.5 State or Federal The agency, by utilizing special federal (option A) or state (option B)Funds funds, finances the cost of addressing contamination incidents. Examplesare the federal and state "superfunds" for abandoned waste sites, and thestate fund for plugging oil and gas wells.Note:Enforcement action includes any agency action which accomplishes or requires the identification,documentation, monitoring, assessing, or remediation of <strong>groundwater</strong> contamination. Theachievement of these objectives vary among the regulatory programs. Not all agencies or programswithin an agency will follow all of this sequence: for example, the Superfund program of theTNRCC starts at Status Code 5.28

Activity Status CodesOnce <strong>groundwater</strong> contamination has been confirmed, either the regulated entity or an agency will address the<strong>groundwater</strong> contamination incident. Confirmed incidents of contamination are generally addressed byfollowing predictable sequence of actions until it is concluded that no further actions are necessary orrequired. Once contamination has been detected or is suspected, initial actions consist of validation ofsampling results or quality assurance controls to confirm contamination has occurred and is man-induced. Aninvestigation to study the extent, composition, and circumstances of the contamination follows theconfirmation of contamination.Additional actions may or may not be required based on the investigation findings. If the investigation findsthat further actions are required, the planning of corrective action measures to address the contamination andsource are initiated. Following the development of the corrective action plan, actions are taken to implementthe plan and physically address the contamination and source. The effectiveness of the corrective actionmeasures is generally monitored during and after the implementation of the plan. Ultimately, the correctiveaction measures are considered completed when the site has been remediated, the source has been removed, orwhen no further actions are required. The activity status codes are further described in Figure 6.29

Figure 6. Enforcement Status Matrix/Activity Status CodesCode Activity Description0 No Activity No actions have been conducted at the incident site.1 Contamination Contamination is being validated through resampling or data qualityConfirmed assurance controls, etc. Options are to: A) take action and investigatefurther if validated or required, or B) not take action based on confirmationfindings.2 Investigation The incident is being studied to determine the extent, composition, and/orother properties and circumstances of the contamination. Additional actionA) may or B) may not be required based on investigation findings.3 Corrective Action A remedy (corrective action plan) for the contamination is being developedPlanning (based on the investigation findings). General examples include plans to:remove the source of contamination, remediate impacted <strong>groundwater</strong>,disinfect or replace wells, etc.4 Implement Action The planned remedy (corrective action plan) is being carried out. Actionsto address the contamination are being conducted.5 Monitor Action The effectiveness of the remedy is being monitored. This can be a long- orshort-term action and can be performed during and after implementation.6 Action Completed The remedy is considered complete when the desired result has beenachieved. Options include: A) remediation efforts were completed(contaminants reduced to health based levels); B) the contaminant sourcewas removed and the impact addressed; C) no further regulatory action isrequired; D) agency action final, however, contamination still exists underinstitutional controls (deed records noting contamination; use and exposurerestrictions; requiring maintenance of engineering controls, etc.); or, E)agency action final, however, contamination still exists under requiredengineered controls.30

GROUNDWATER PROTECTIONPROGRAM DESCRIPTIONS<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>The <strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong> (TNRCC) conducts regulatory <strong>groundwater</strong>protection programs that focus on both the prevention of contamination and the identification, assessment,and remediation of existing problems. The TNRCC implements these programs through education, voluntaryaction assistance, permitting, and enforcement. As the state lead agency for water quality protection, theTNRCC administers both state and federally mandated programs. Federal programs administered by theTNRCC include the Resource Conservation and Recovery Act; the Comprehensive Environmental Response,Compensation and Liability Act; the Clean Water Act; the Safe Drinking Water Act; and the development ofstate management plans for prevention of pesticide contamination of <strong>groundwater</strong> under the FederalInsecticide, Fungicide, and Rodenticide Act.The Office of Waste Management contains the following <strong>groundwater</strong> related programs. The PetroleumStorage Tank Division regulates underground and above ground product storage tanks and requires<strong>groundwater</strong> monitoring and remediation at contaminated sites. The Industrial and Hazardous Waste Divisionhas responsibility for preventing <strong>groundwater</strong> contamination and ensuring remediation at industrial sitesthrough the waste disposal facility permitting program, and the Class I and Class III underground injectioncontrol programs. The Municipal Solid Waste Division monitors activities associated with the collection,handling, storage, processing, and disposal of municipal solid waste to ensure protection of <strong>groundwater</strong>. ThePollution Cleanup Division is responsible for Federal and State Superfund activities, the Voluntary CleanupProgram, Corrective Action and spill response. The division conducts remedial investigations and seeksfunding for remedial activities based upon a health risk ranking program. Office of Waste Managementprogram descriptions are included for the Industrial and Hazardous Waste, Municipal Solid Waste, PetroleumStorage Tank, and Pollution Cleanup Divisions.The Office of Water Resource Management contains the following <strong>groundwater</strong> related programs. The WaterQuality Division is responsible for the surface and <strong>groundwater</strong> quality management and planning programs,the development and implementation of water quality standards, the implementation of the surface and<strong>groundwater</strong> nonpoint source pollution programs, the Class V underground injection well program, thepesticides in <strong>groundwater</strong> program, ensuring that <strong>groundwater</strong> resources are protected through permittingactivities related to concentrated animal feeding operations and municipal and industrial wastewatertreatment, and supporting the <strong>Texas</strong> Groundwater Protection Committee. The Water Utilities Divisionmonitors public water systems for compliance with state drinking water standards and conducts the SourceWater Protection Program. Office of Water Resource Management program descriptions are included for theWater Quality and Water Utilities Divisions.Within the Office of Compliance and Enforcement, the Field Operations Division is responsible for the fieldinvestigation of contamination complaints and the inspection of permitted and non-permitted facilities. Inaddition, primary responsibility for the Edwards Aquifer Protection program is in this division. TheCompliance Support Division is responsible for professional licensing and the on-site wastewater program.The Enforcement Division is responsible for ensuring that <strong>groundwater</strong> resources are protected during31

enforcement activities related to the municipal solid waste, industrial and hazardous waste, petroleum storagetank, agricultural and watershed management, water utilities, and public water supply programs. Office ofCompliance and Enforcement program descriptions are included for the Compliance Support, Enforcement,and Field Operations Divisions.Compliance Support DivisionThe Compliance Support Division (CSD) contributes to the protection of the state’s <strong>groundwater</strong> resourcesby functioning as a licensing entity certifying those environmental professionals who design, construct,install, remove, operate, and maintain environmentally sensitive equipment, facilities, and systems providingcommercial and residential irrigation, water and petroleum storage, drinking water protection and treatment,wastewater processing, on-site sewage facilities, and waste disposal services.The Compliance Support Division issues 18 different types of certifications lending protection to the<strong>groundwater</strong> resources of <strong>Texas</strong>. During 1997, the CSD maintained more than 50,000 certifiedenvironmental professionals, issued more than 32,000 new and renewal certifications, administered more than12,000 examinations, and conducted more than 400 enforcement investigations.The CSD also contributes to protection of <strong>groundwater</strong> by the timely processing and accurate review ofcertification applications to include all education, training, experience and examination qualificationrequirements, the administration and validation of certification examinations; the development and approvalof training courses and instructors; the efficient issuance of new and renewal certificates; the investigationand resolution of competency reviews and enforcement cases; and the establishment and maintenance ofcertification rules and standards. The CSD additionally provides technical assistance to environmentalprofessionals reinforcing the state’s voluntary compliance frontline for <strong>groundwater</strong> pollution prevention andnatural resource conservation. Note: Effective September 1, 1997 the Water Well and Pump Installerprograms were transferred to the <strong>Texas</strong> Department of Licensing and Regulation and is discussed later in theprogram description for that agency.On-Site Sewage Facilities. The Compliance Support Division administers the regulation of on-site sewagetreatment facility (OSSF) construction as authorized in Chapter 366, <strong>Texas</strong> Health and Safety Code andguided by Chapter 285, <strong>Texas</strong> Administrative Code. The <strong>Texas</strong> Department of Health (TDH) began thepermitting and regulation of OSSFs in counties without approved waste control orders on September 1, 1989.On March 1, 1990, installers and inspectors had to be trained and tested, and installers were required to becertified. On March 1, 1992, all duties and obligations of TDH relating to OSSFs were transferred to theTNRCC. The On-Site Wastewater Installer Program was moved to the Field Operations Division onSeptember 1, 1994. Subsequently, it was again moved to the Compliance Support Division on July 1,1997, in an effort to consolidate professional certification programs within the TNRCC. This final movecoincided with the publishing of new rules on February 5, 1997 for the OSSFs and the implementation of acertification of On-Site Sewage Facilities Installers, Apprentices, Designated Representatives, and SiteEvaluators which had been approved on December 18, 1996. The regulations require that new OSSFs bedesigned and constructed, using current technology, and that older failing systems be brought up to currentstandards. Additionally, continuing education training is a requirement for OSSF professionals to maintaintheir annual state certification. The program also performs compliance reviews of local regulating entities toevaluate their enforcement of the state’s minimum requirements.32

Status of Groundwater Monitoring Programs. The Compliance Support Division’s contaminationinvestigation program is generally a complaint response program. The programs in the division do notinvolve the monitoring of <strong>groundwater</strong> in association with a regulated activity in order to detectcontamination. When appropriate during certain remediation or enforcement activities involving<strong>groundwater</strong> contamination, the TNRCC may perform or require <strong>groundwater</strong> monitoring to evaluateremediation progress or success.Status of Groundwater Contamination. The Compliance Support Division is providing technicalassistance on more than 126 OSSF cases. None of these cases currently involve monitoring for <strong>groundwater</strong>contamination. Construction of an OSSF treatment and disposal system must be isolated from certain areassuch as water wells, lakes, roads, and other objects subject to contamination from the OSSF or which mayprevent the proper operation of the system. Additionally, no individual may install, construct, alter, extend,or repair an OSSF unless the individual holds a valid certification issued by the executive director of theTNRCC or has a valid exemption.Enforcement DivisionProgram Description. The Enforcement Division was created on September 1, 1995, to centralize theTNRCC’s enforcement activities into a single division. The Enforcement Division now contains threesections: Air, Water, and Waste.Although the Waste Section of the Enforcement Division is responsible for enforcement issues that involvethe Industrial and Hazardous Waste (IHW), Municipal Solid Waste, and Petroleum Storage Tank programareas, only IHW sites are listed under the Enforcement Division’s jurisdiction in this <strong>report</strong>. Groundwaternoncompliances addressed by the Waste Section include violations of §26.121 of the <strong>Texas</strong> Water Codewhich prohibits unauthorized discharges into or adjacent to any water in the state.The Water Section of the Enforcement Division coordinates the development of all noncompliance cases forthe Agriculture, Watershed Management, and Water Utilities programs. The section enforces water qualityprotection provisions under the <strong>Texas</strong> Water Code, <strong>Texas</strong> Health and Safety Code, state rules, water qualitypermits, and orders issued by the TNRCC.Both sections track noncompliances, issue agreed orders, and pursue litigation in extreme cases through theOffice of the <strong>Texas</strong> Attorney General.Status of Groundwater Monitoring Programs. The Waste Section oversees approximately 200 sites thatare required to monitor <strong>groundwater</strong> contamination in accordance with the <strong>Texas</strong> Administrative Code orRCRA regulations.The Water Section currently provides enforcement support for 10 active Water Quality Division cases thatare either in a planning, assessing, <strong>report</strong>ing, or remediation phase. The active enforcement cases involvedocumented violations of the Water Code, permits, orders, or rules that have the potential to cause<strong>groundwater</strong> contamination.Status of Groundwater Contamination. The Waste Section of the Enforcement Division has included 178cases with confirmed <strong>groundwater</strong> contamination in Table 1 of this <strong>report</strong> under the heading “ENF/WST.”Sixteen of the cases are new in 1997. Twenty-two of the facilities have impacted water wells; however, none33

of these cases required notification under §5.236 of the <strong>Texas</strong> Water Code during this <strong>report</strong>ing period. Nocases were dropped from the 1996 listing.The Water Section has listed five cases with confirmed <strong>groundwater</strong> contamination in Table 1 under theheading “ENF/WTR.” None of these cases required notification under §5.236 during this <strong>report</strong>ing periodand no new cases were added in 1997.Field Operations DivisionProgram Description. Reports of alleged <strong>groundwater</strong> contamination received from citizens or referred fromother agencies or entities are assigned for investigation to the TNRCC division with jurisdiction for theparticular type of activity involved. Regulated activities include industrial and municipal wastewaterdischarge, industrial hazardous and solid waste storage and disposal, municipal solid waste transfer anddisposal, and petroleum storage tanks. Field Operations Division personnel are generally the first to respondto complaints, emergency spills, or various other situations which may result in <strong>groundwater</strong> contamination.After the investigation is completed and contamination is confirmed, field personnel refer the case to theappropriate division for coordination. If a particular activity or jurisdiction cannot be identified, then aninvestigation is conducted by the Field Operations Division.Information is gathered about the contamination site through site inspection, well or contamination sourceinventory, and water-quality sampling. The information is analyzed and <strong>report</strong>ed to the complainant. Effortsare made to effect remediation or enforcement as necessary. Reports are maintained in <strong>groundwater</strong>contamination investigation files for complaint sites in the TNRCC's Central Records.In addition, the Field Operations Division manages the administration of the Edwards Aquifer Water QualityProtection rules consisting of review and approval of water pollution abatement plans, sewage collectionsystem plans, and static hydrocarbon and hazardous substance storage facility plans. Rules for the protectionof the Edwards Aquifer (Title 30, <strong>Texas</strong> Administrative Code, Chapter 213) were amended and becameeffective in December 1996.Status of Groundwater Monitoring Programs. The contamination investigation program is essentially aresponse program. The program does not involve monitoring of <strong>groundwater</strong> in association with a regulatedactivity in order to detect contamination. During certain remediation activities of identified <strong>groundwater</strong>contamination, the TNRCC may perform or require <strong>groundwater</strong> monitoring to evaluate remediation progressor success.Status of Groundwater Contamination. 11 cases of <strong>groundwater</strong> contamination are listed, by county, inTable 1 under the division heading “FOD.” No new cases were added by the division in 1997. Most of thecases listed for the Field Operations Division in Table 1 involve hydrocarbons associated with spills or leaks.34

Industrial and Hazardous Waste DivisionProgram Description. The Industrial and Hazardous Waste (IHW) Division regulates the disposal ofhazardous and non-hazardous industrial solid waste and hazardous municipal waste under the authority of the<strong>Texas</strong> Solid Waste Disposal Act, as amended (Chapter 361, <strong>Texas</strong> Health and Safety Code), and underfederal authorization to administer the federal Resource Conservation and Recovery Act (RCRA), asamended. The IHW Division also regulates radioactive waste disposal program under the authority of the<strong>Texas</strong> Radiation Control Act, as amended (Chapter 401, <strong>Texas</strong> Health and Safety Code), and under thefederal authorization of the Atomic Energy Act of 1954, as amended. The uranium mining and millinglicensing program was transferred to the <strong>Texas</strong> Department of Health in July, 1997; consequently<strong>groundwater</strong> monitoring requirements and contamination events previously <strong>report</strong>ed at those sites are nolonger included in this <strong>report</strong>. In addition to operating federally-authorized programs, the IHW Division alsorefers cases to the Enforcement Division/Waste Section when they involve violations of §26.121 of the <strong>Texas</strong>Water Code, which prohibits unauthorized discharges into or adjacent to waters in the state, including<strong>groundwater</strong>.Under RCRA authorization, the IHW Division regulates the <strong>groundwater</strong> monitoring programs (Detection,Compliance and Corrective Action Programs) of approximately 250 industrial facilities with land disposalunits. Land disposal units subject to regulation include landfills, landfill spill sites where contamination is notremoved, surface impoundments, land treatment units, and waste piles. Monitoring of <strong>groundwater</strong> quality inthe uppermost aquifer beneath these units is achieved through the combined efforts of the IHW Division(Permits Section, Underground Injection Control, and Radioactive Waste Section), Enforcement Division(Waste Section), and the Pollution Cleanup Division (Corrective Action Section).Program Descriptions. More than one type of monitoring program can be required at a facility, dependingon the number, age, and location of land disposal units and the applicable regulatory programs. Essentially, asmany as seven distinct monitoring programs could be required at an industrial facility as a result of changesin the hazardous and solid waste program over time for the facility. A summary of major programs andprogram changes follows.Prior to 1981, monitoring at solid waste sites was required: 1) by permit for off-site commercial disposalfacilities; 2) pursuant to an information request to complete a solid waste registration for on-site noncommercialdisposal facilities; or 3) in response to enforcement directives. Monitoring requirements were notstandardized.Since November 19, 1981, all on-site disposal facilities subject to RCRA have been required by agency rulesto conduct a standardized detection monitoring program (Program No. 1) during the interim status perioduntil such time as a permit with site-specific monitoring requirements is issued, or the waste facility is closedby removal of hazardous waste and contamination to levels protective of human health and the environment.Unless specific variances are granted, this program requires all operators to sample for a standard suite ofparameters and to perform the same statistical evaluation of the results. When a release is indicated, theoperator implements an assessment monitoring program (Program No. 2) designed to determine thecomposition and extent of the release.Once permitted, an operator continues to monitor the waste units according to provisions in the facility'spermit. A permitted detection monitoring program (Program No. 3) is specified for units for which no releasehas been indicated. The sampling program is based on hazardous constituents specific to the waste beingdisposed. Should a release occur, the operator implements a compliance monitoring program (Program No. 4)35

wherein the monitor well system is sampled for all hazardous constituents, about 270 in number, and aconcentration limit is established for each detected constituent. Should this value be exceeded in subsequentsampling events, the operator must implement a corrective action program (Program No. 5).In general, corrective action entails three activities. Source remediation activities are usually performed first.This includes removal, treatment, and containment of waste and contaminated soils, or fixing leaks in tanks,pond liners, pipelines, etc. The other two activities, performed concurrently, are aquifer remediation, such asuse of extraction wells or french drains, and <strong>groundwater</strong> monitoring to measure the effectiveness of theremedy.The Hazardous and Solid Waste Amendments (HSWA) of 1984 added additional investigation and correctiveaction requirements to permitted RCRA facilities specific to releases from solid waste management units(including pre-RCRA units) at the facility. Once corrective action measures prompted by a facilityinvestigation are set in place through the RCRA Facility Investigation (Program No. 6) for such units, thepermit will be amended to include monitoring and performance standards in a manner similar to RCRA units.Monitoring of many of the pre-1981 units will be added to RCRA permits by this requirement.Releases from solid waste facilities or sites or activities not subject to RCRA are monitored, investigated, orremediated as necessary (Program No. 7) in response to <strong>groundwater</strong> quality assessments performed inconjunction with approved closure activities, TNRCC enforcement orders, court judgements, spillinvestigations, complaint investigations, or voluntary actions.Groundwater protection standards for hazardous and non-hazardous wastes were promulgated by the TNRCCand became effective on June 28, 1993 as the Risk Reduction Rules. The Risk Reduction Rules serve toprotect human health and the environment and are located in Subchapters A and S of Chapter 335 of Title 30<strong>Texas</strong> Administrative Code.In general, the Enforcement Division establishes monitoring programs for interim status facilities orpermitted facilities that are noncompliance with their RCRA permit (Programs 1 and 2), the Industrial andHazardous Waste Division establishes monitoring programs for facilities that are subject to a RCRA Permit(Programs 3 through 5), and the Pollution Cleanup Division addresses the RCRA Facility Investigation(Program 6) and non-RCRA remediation, investigation and monitoring activities (Program 7).Radioactive Waste Program Description. Groundwater monitoring of the disposal of radioactivesubstances, including any low-level radioactive wastes or naturally occurring radioactive materials, isregulated by a radioactive material licensing program. Currently, no low-level radioactive waste or naturallyoccurring radioactive material disposal sites are licensed in the state of <strong>Texas</strong>. The licensing program isadministered by the Underground Injection Control and Radioactive Waste Section of IHW. The program isoverseen by the U.S. Nuclear Regulatory <strong>Commission</strong>.Underground Injection Control Program Description. IHW's Underground Injection Control (UIC)program, administered under the authority of the federal Safe Drinking Water Act, regulates Class IIIinjection wells which are used to inject solutions underground in order to produce minerals. Since theproducible minerals are found in an underground source of drinking water as defined by EPA, an AquiferExemption is necessary in order to allow injection. Therefore, as an essential part of the UIC program,monitoring of <strong>groundwater</strong> is required before, during, and after mining occurs at a Class III injection wellproject.36

Since 1975, when the first Class III injection well permit was issued, 34 sites have been permitted foruranium mining, six for Frasch sulfur mining, and three for sodium sulfate mining. Groundwater monitoringvaries for each of the three types of mining. The three sites which mined for sodium sulfate are currentlybeing plugged because of unfavorable economic conditions. Only two of the original six Frasch sulfur sitesare currently in operation and they are being plugged for closure. Off-site contamination from these sulfursites is highly unlikely since sulfur must be super-heated to a liquid state in order for it to flow. Anymovement away from the mine area would cool and harden the sulfur. By far, the most extensive <strong>groundwater</strong>monitoring is involved in the uranium program.Groundwater samples must be analyzed prior to any injection into a Class III well at a uranium mining site inorder to obtain background or pre-mining values. In many cases, the natural background values for these lasttwo parameters will exceed EPA drinking water standards because of the existence of the ore body itself.During the mining phase of the project, the mining companies are required to submit quarterly monitoring<strong>report</strong>s for review and approval. The <strong>report</strong>s contain <strong>groundwater</strong> analyses from within the zone being minedas well as <strong>groundwater</strong> from aquifers overlying and underlying the mined zone. Analyses includeconductivity, uranium, sulfate or chloride, and in some cases, ammonia. These control parameters are used todetect movements of mining fluids, or excursions, out of the mine area and into the monitor wells. If anexcursion is detected, additional monitoring is required and steps must be taken by the company to control themining fluid plume. A company's failure to conduct additional monitoring and control the plume is a violationof the permit, which will result in appropriate enforcement action by the TNRCC.Once mining is completed, the affected <strong>groundwater</strong> must be restored to levels consistent with baseline valuesand with previous <strong>groundwater</strong> use. Once restoration is completed, a six-month stability period must takeplace before the area is declared restored and the wells are plugged. To ensure the aquifer is restored to levelsapproved by the TNRCC, <strong>groundwater</strong> samples are taken for verification every other month by the TNRCCand the company to be analyzed in separate labs. At any time during the life of the project, water samplesmay be taken by TNRCC officials, or water samples taken by the company may be split with field inspectorsfor verification of sampling procedures, techniques, and results.In addition, the IHW Division’s UIC program regulates Class I injection wells. Class I injection wells areused to inject treated municipal wastewater and hazardous or nonhazardous liquid industrial waste below thelowermost underground source of drinking water (USDW). There are approximately 120 Class I injectionwells permitted and operating in <strong>Texas</strong>. Approximately one-half of the wells are permitted for hazardouswaste, and the other half are permitted to inject only nonhazardous waste. Likewise, 110 of the Class Iinjection wells are for disposal of on-site generated waste, and ten wells are for commercial disposal of offsitegenerated waste.The disposal of most hazardous wastes in Class I injection wells is prohibited by Land Disposal Restriction(LDR) regulations unless; 1) it can be demonstrated that the waste no longer is hazardous when it leaves theinjection zone, 2) the waste will not leave the injection zone for at least 10,000 years, or 3) the waste istreated to meet or exceed LDR standards. Most Class I hazardous injection wells have been exempted fromLDR by EPA after demonstrating either 1) or 2), above.The basic design objectives of Class I injection wells are to keep waste confined to injection zones andpermanently isolated from drinking water. The required design of Class I injection wells necessitates use ofmultiple protective barriers of steel or fiberglass well casings, and casing cements, together with continuousmonitoring of the well for development of any leaks, and annual monitoring of the reservoir, to assureseparation of injected wastes from the lowermost USDW. Class I injection wells in <strong>Texas</strong> average37

approximately 12 inches in diameter and, on average, are approximately 5,000 feet deep. The wells arerequired to have surface casing below the lowermost USDW, regardless of the depth.Applications for Class I injection wells must demonstrate that the location is geologically suitable and thatthe injection zone and confining zone are free of transmissive faults, fractures, and unplugged abandonedwells which could act as conduits for leakage of waste from the injection zone. In addition, reviews of wellconstructions/pluggings, as well as pressure buildup, are conducted annually. A thorough re-evaluation is alsomade at the time of permit renewal, before a recommendation for renewal is made. Also, all wells are requiredto have continuous monitoring of the annulus to detect leaks. Such monitoring provides a continuousindication of mechanical integrity of the well. In a few cases, the TNRCC has required injection zone pressuremonitor wells.Status of IHW Division Groundwater Monitoring Programs. The IHW Division’s monitoring programsrely upon over 760 operators or responsible parties to correctly sample, analyze, interpret, and <strong>report</strong> thesignificance of <strong>groundwater</strong> quality at their facilities. TNRCC inspectors and staff check the compliancestatus of operators annually and perform periodic in-depth reviews, including agency sampling of monitorwells, for all RCRA regulated facilities. Similar actions are performed for non-RCRA sites as the situationdictates. TNRCC analyses are compared to the facility's <strong>report</strong>ed results, sampling procedure, data quality,and interpretations in order to determine the validity of the self-<strong>report</strong>ed data.Seventeen facilities are included in the radioactive materials licensing program of the TNRCC. Groundwatermonitoring is conducted by the TNRCC at ten of these facilities, while the others (the in-situ uraniumfacilities) are monitored for <strong>groundwater</strong> quality through the self-<strong>report</strong>ing process overseen by the TNRCC.In addition to required licensee monitoring at uranium mining or milling facilities, the TNRCC monitors<strong>groundwater</strong> on a quarterly basis at buried radioactive waste sites. Groundwater monitoring on a case-by-casebasis may also be done on request or in response to pending licensing actions.The Class III Underground Injection Control program currently includes three sodium sulfate, two sulfur, and18 uranium facilities. Each uranium mine site contains one to eight production areas for a total of 51 uraniumproduction areas. All of these areas are subject to <strong>groundwater</strong> monitoring. There are approximately 1,100wells sampled under the Class III Underground Injection Control program with approximately 4,000 samplestaken each year.Status of Groundwater Contamination. At the beginning of the year (1997), the Industrial and HazardousWaste (IHW) Division managed 201 cases with confirmed <strong>groundwater</strong> contamination. In September 1997,the IHW Corrective Action Section was transferred from the IHW Division to the Pollution Cleanup Divisionto streamline corrective action procedures. After the transfer, the IHW Division retained 78 of the 201<strong>groundwater</strong> contamination cases because of long term monitoring and corrective action requirements (i.e.,Compliance and Corrective Action Program). The 123 cases that were transferred to the Pollution CleanupDivision with the Corrective Action Section either required additional <strong>groundwater</strong> investigation(s) prior toestablishing long-term monitoring/corrective action; or only required short-term <strong>groundwater</strong> monitoring toverify closure of a solid waste management unit. All IHW cases are listed by county in Table 1 under thedivision heading "IHW.” Six new cases were added throughout 1997 to the IHW Division. No cases weredropped (activity status code “6") from the 1996 listing. No IHW case required notification to local officialsunder §5.236 of the <strong>Texas</strong> Water Code since the publication of the previous <strong>report</strong>.Of the 78 cases in the IHW Division, IHW's Class III Underground Injection Control program has noconfirmed case beyond the permit facility boundaries. There is no case of contamination of drinking water38

supplies from IHW's Class I Underground Injection Control program. All of the contamination cases are<strong>report</strong>ed by IHW Permits Section.Of the seven monitoring programs identified in the preceding narrative, only the programs monitoringreleases (Program Nos. 2, 4, 5, 6, 7) have a potential of being listed in the table. Programs requiring andimplementing assessment of a release (Nos. 2, 4, 6) are considered in Activities Status Code 2. Programsrequiring and conducting corrective action monitoring are considered in Activities Status Code 5. Because ofthe long-term nature of aquifer remediation programs, the following distinction was made when determining afacility's Activities Status:Code 4 - Implement Action - includes facilities in the process of installing a corrective action systemand/or performing source remediation under a specific time frame, such as one or two years;Code 5 - Monitor Action - includes facilities that have completed short-term activities (Code 4activities) and are now performing long-term remediation and monitoring activities for which notime frame for completion can be specified.The remediation activity will be considered complete when the required <strong>groundwater</strong> quality standards havebeen achieved, as determined by the monitoring program.39

Municipal Solid Waste DivisionProgram Description. The Municipal Solid Waste (MSW) Division regulates the collection, handling,storage, processing, and disposal of municipal solid waste in <strong>Texas</strong> under the authority of the <strong>Texas</strong> Healthand Safety Code (<strong>Texas</strong> Solid Waste Disposal Act), as amended, and under federal authority of the ResourceConservation and Recovery Act (RCRA), Subtitle D, as amended. The MSW Division, Regulatory Section,Groundwater Monitoring Team (GWMT) is charged with the responsibility of monitoring all activitiesrelated to the protection of <strong>groundwater</strong> from degradation by municipal solid waste landfill (MSWLF)activities. The GWMT of the MSW Division is also charged with requiring, implementing, and monitoringcorrective and remedial activities associated with <strong>groundwater</strong> contamination. The Enforcement Division isresponsible for enforcement orders and other actions related to <strong>groundwater</strong> contamination.Prior to March 1, 1992, the Bureau of Solid Waste Management of the <strong>Texas</strong> Department of Health (TDH)was responsible for all regulatory activities involving municipal solid waste. On that date, Senate Bill 2 ofthe 72nd Legislature transferred all powers, duties, rights, and obligations of the TDH pertaining to thetreatment, handling, storage, and disposal of municipal solid waste to the <strong>Texas</strong> Water <strong>Commission</strong> which,upon merging with the <strong>Texas</strong> Air Control Board, became the <strong>Texas</strong> Natural Resource Conservation<strong>Commission</strong> (TNRCC) on September 1, 1993.On October 9, 1991, new federal regulations under RCRA, Subtitle D promulgated revisions to the Criteriafor Classification of Solid Waste Disposal Facilities set forth in 40 CFR part 257. These revisions weredeveloped in response to the 1984 Hazardous and Solid Waste Amendments to RCRA. The new rules addeda new part 258 which established minimum federal criteria for MSWLFs, including location restrictions,facility design and operating criteria, <strong>groundwater</strong> monitoring requirements, corrective/remedial actionrequirements, financial assurance requirements, and closure and post-closure care requirements. The rulesestablished different requirements for existing and new units (for example, existing units are not required toremove wastes in order to install liners). In addition, the final rule amended part 257 by making conformingchanges that make it consistent with the new part 258.All of the new regulations apply to owners and operators of facilities with capacities greater than 100 tons perday (TPD) that received waste on or after October 9, 1993, or those with capacities equal or less than 100TPD that received waste on or after April 9, 1994. Owners and operators of facilities that stopped receivingwaste prior to October 9, 1991, are exempt from the new regulations. Facilities that stop receiving wastebetween October 9, 1991, and October 9, 1993, are exempt from all parts of the regulations except thosepertaining to final cover requirements.Status of the Groundwater Monitoring Program. Prior to the Subtitle D rules, most major municipal solidwaste landfills were required by permit to install <strong>groundwater</strong> monitor wells. Some landfills that were notinitially required to have monitor wells later installed them as a result of the discovery of potential<strong>groundwater</strong> contamination. Under the new RCRA, Subtitle D rules that went into effect October 9, 1993,all Type I municipal solid waste landfills that receive more than 20 tons of waste per day are required to have<strong>groundwater</strong> monitoring systems and monitor <strong>groundwater</strong> quality, except those where a suspension from<strong>groundwater</strong> monitoring requirements has been approved. Of the approximately 416 MSWLFs andtransfer stations in the regulatory program, 173 have <strong>groundwater</strong> monitoring systems with an estimated totalof 1,400 monitor wells as of December 31, 1997.MSW rules that existed prior to the new Subtitle D rules required that background <strong>groundwater</strong> samples betaken from each monitor well during each of the four calendar quarters, and that each sample be analyzed for40

29 chemical parameters. Subsequent samples were taken quarterly, semi-annually, or annually, as required inthe facilities’ permits or by the GWMT, and were analyzed for an abbreviated number of parameters. Sitesthat closed prior to the October 9, 1993, or April 9, 1994, deadlines are presently following theserequirements during their post-closure care periods.The RCRA Subtitle D <strong>groundwater</strong> monitoring requirements are phased in for active landfills based onproximity to the nearest drinking water intake (including any surface water intake, domestic well, publicwater supply well, etc. utilized for human consumption). These requirements include the following: athorough <strong>groundwater</strong> characterization study; an approved certification of the site's <strong>groundwater</strong> monitoringsystem; an approved Groundwater Sampling and Analysis Plan (GWSAP); a modified and expanded list ofanalytical parameters including 47 volatile organic compounds; at least four background sampling events[depending on the statistical method(s) utilized]; a semiannual sampling schedule during detectionmonitoring; and, statistical analysis of <strong>groundwater</strong> analytical data. An annual sampling schedule may beallowed under certain conditions.Prior to the Subtitle D rules, when <strong>groundwater</strong> analyses indicated a departure from background or historicallevels, or if other evidence of possible contamination was present, the GWMT required re-sampling ofexisting monitor wells, often including additional analytical parameters. If further investigation indicatedprobable contamination, the permittee was required to initiate a remedial investigation, potentially leading tocorrective action and/or remediation.Under the Subtitle D rules, the permittee conducts background monitoring as prescribed in an approvedGWSAP. Upon completion of background sampling, the permittee is required to conduct detectionmonitoring sampling and to initiate statistical analysis of the <strong>groundwater</strong> analytical data and to continueperforming statistical analysis of the data in subsequent detection monitoring events. If statistical analysisindicates that a statistically significant change (SSC) in constituent concentrations has occurred frombackground concentrations, the site must notify the TNRCC of the SSC. The facility may resample toconfirm the SSC and/or demonstrate within 90 days of the notification that the SSC has occurred due to asource other than the landfill. If the demonstration is not satisfactory, the owner/operator becomes subject tothe requirements of assessment monitoring, which includes analysis for an expanded list of constituents. Ifone or more assessment monitoring constituents are detected at statistically significant levels aboveestablished <strong>groundwater</strong> protection standards [which could be maximum contaminant levels (MCLs),background concentrations, or health-based concentrations] the owner/operator must initiate an assessment ofcorrective measures and must characterize the nature and extent of the release. At this time, the facility willbe added to the list of MSWLFs with known <strong>groundwater</strong> contamination. After the assessment of correctivemeasures and before the selection of the remedy, the permittee is required to conduct a public meeting todiscuss the results of the assessment of corrective measures with affected and interested parties. This, in turn,will lead to the selection of the remedy and the implementation of the appropriate corrective action/remedialaction.Status of Groundwater Contamination. Approximately 3,900 samples were collected from all the wellssampled in 1997. Groundwater contamination has been confirmed at the 26 MSWLF sites listed by county inTable 1 under the heading "MSW.” Of those 26 sites, contamination has been found in approximately 144samples from an estimated 69 monitor wells. None of the 26 contamination cases are new and none of themrequired the notification of local officials under <strong>Texas</strong> Water Code, §5.236. Two sites listed in the 1996<strong>report</strong> were removed because actions were completed.41

At the end of 1997, confirmation of contamination or some form of remedial investigation was under way atapproximately 15 sites (activity status codes 1 and 2). During 1997, corrective action and/or remediation(activity status codes 3, 4, and 5) took place at approximately eight sites. Two municipal solid waste landfillfacilities (MSWLFs) from the 1996 <strong>report</strong> were upgraded to “action completed” (activity status code 6).Remedial actions for Subtitle D MSWLFs are completed when the owner or operator: (A) complies withprescribed <strong>groundwater</strong> protection standards established in the rules; (B) demonstrates that concentrations ofassessment constituents have not exceeded the <strong>groundwater</strong> protection standards for a period of threeconsecutive years using the statistical procedures and performance standards in the rules; and, (C) satisfies allactions required to complete selected remedies. Within 15 days of completion of the remedy, the owner oroperator must submit to the TNRCC’s Executive Director, and also place in the operating record, acertification by a qualified <strong>groundwater</strong> scientist that the remedy has been completed in compliance with therequirements of the rules.Petroleum Storage Tank DivisionProgram Description. The Petroleum Storage Tank (PST) Division regulates underground and abovegroundproduct storage tanks as authorized by the federal Solid Waste Disposal Act of 1970, as amended by theResource Conservation and Recovery Act of 1976, and empowered by Subchapter I, Chapter 26 of the <strong>Texas</strong>Water Code. Approximately 95 percent of the regulated storage tanks contain petroleum products with theremainder containing regulated hazardous substances.At regulated facilities where a product release has impacted <strong>groundwater</strong>, semi-annual <strong>groundwater</strong>monitoring is required in conjunction with any necessary remedial activities. In some instances, quarterly<strong>groundwater</strong> monitoring may be required by PST staff. Groundwater monitoring is required until contaminantconcentrations reach acceptable levels determined by the PST staff on a site-by-site basis.Additionally, in accordance with the underground storage tank technical standard requirements found inTNRCC rules, Title 30, <strong>Texas</strong> Administrative Code, Chapter 334, a method of product release detection isrequired for all underground storage tanks. Monitoring <strong>groundwater</strong> for the presence of a regulated substanceis an acceptable method of release detection.Status of Groundwater Monitoring. The PST Division regulates 63,565 facilities containing 158,393registered underground storage tanks and 20,688 registered aboveground storage tanks. Some of the inherentproblems of this regulatory program include the sheer number of regulated facilities and their correspondingwide geographical distribution throughout the state. Groundwater is monitored at these facilities whenreleases have been detected or as an option for release detection. New and existing facilities will requireretrofitting and are subject to release detection requirements.There are an estimated 44,366 monitor wells in place under the PST regulatory program. In 1997 the PSTDivision received monitoring <strong>report</strong>s from 2,220 leaking petroleum storage tank (LPST) sites which containapproximately 13,181 monitor wells. Of these, approximately 9,415 monitor wells have contamination to<strong>groundwater</strong>. During 1997, approximately 115,540 <strong>groundwater</strong> samples were collected from the 2,220LPST sites. Approximately 11,100 of these samples showed <strong>groundwater</strong> contamination.Status of Groundwater Contamination. To date, a total of approximately 9,058 <strong>groundwater</strong>contamination incidents have been documented by the PST Division. There have been 2,720 cases deleted42

due to completed action from this and previous <strong>report</strong>s. For 1997, 6,338 cases are listed by county in Table 1under the division heading "PST.” Of these, there are 6 cases which required notification to local officialsunder §5.236 of the <strong>Texas</strong> Water Code since the previous <strong>report</strong>’s publication. There were 1,308 new casesof <strong>groundwater</strong> contamination identified and added in 1997. A total of 477 cases were deleted from the 1996<strong>report</strong> of which action was completed (activity status 6) on 448 cases. The great majority of the cases involve<strong>groundwater</strong> with documented contamination problems. A small percentage are cases where <strong>groundwater</strong> isimminently threatened.Pollution Cleanup DivisionFederal and State Superfund Program Description. In 1980 the United States Congress passed theComprehensive Environmental Response, Compensation, and Liability Act (CERCLA), commonly known asthe "Superfund" law. The purpose of the federal Superfund legislation was to protect public health and theenvironment from hazardous substances by authorizing federal action in response to releases into theenvironment from abandoned hazardous waste sites. Potentially contaminated sites referred to the PollutionCleanup Division (PCD) by the TNRCC’s district offices, the EPA, local government entities, and individualsare evaluated and ranked according to the degree of hazard presented to the public health and theenvironment. High ranking sites are referred to the EPA for placement on the National Priorities List (NPL).When sites are listed on the NPL, TNRCC staff petitions EPA for federal funds for planning, siteinvestigation, feasibility studies, design work, remediation, and operation and maintenance of the site.The <strong>Texas</strong> State Superfund Program was created in 1985 by amendment to the <strong>Texas</strong> Solid Waste DisposalAct to address those sites not eligible for funding under the Federal Superfund Program. The State SuperfundProgram follows the same step-by-step process, from corrective action planning to remediation, as describedfor the federal program. The Act requires that sites placed on the State Superfund Registry first seek fundingfor site cleanup from responsible parties, then federal resources, and lastly state resources.Groundwater monitoring activities occur throughout the Superfund process, from planning throughremediation. Residential and industrial wells near a potential site, in addition to existing or newly installedsite monitoring wells, would typically be sampled to help determine whether a site warrants placement on theNPL. If not, the site would be evaluated for possible inclusion on the <strong>Texas</strong> State Registry of HazardousWaste Sites for remediation under the State Superfund Program. Once placed on either the NPL or stateregistry, the potentially responsible parties (PRPs) are provided the opportunity to enter into an enforceableorder to conduct all aspects of site investigation and remediation. If the PRPs are unwilling to enter into anenforceable order, the state proceeds with this work.A site investigation is conducted to characterize the type and volume of contaminants at a site, the media(such as soil or <strong>groundwater</strong>) contaminated, the lateral and vertical extent of contamination, the risk the siteposes to human health and the environment, and to allow the selection of a remediation technology during thefeasibility study. Groundwater monitoring wells are installed during the site investigation to determine theeffect, if any, a site has had or may have on local <strong>groundwater</strong> resources, and to select alternatives whichcould be used to solve the problems at the site. The remediation technology selected is highly site-specific butmay involve actions to control the source of the contamination and/or to remove contaminants from a<strong>groundwater</strong> bearing zone. If the remedy involves the pumping and treatment of contaminated <strong>groundwater</strong>,additional monitoring wells are generally installed and hydrogeologic data collected during the remediation. Inaddition, after the remediation is complete, <strong>groundwater</strong> monitoring may occur as a part of the operation andmaintenance phase for up to 30 years.43

Voluntary Cleanup Program Description. The Voluntary Cleanup Program was created by amendment tothe <strong>Texas</strong> Solid Waste Disposal Act and became effective on September 1, 1995. The purpose of the <strong>Texas</strong>Voluntary Cleanup Program is to provide a streamlined, incentive-based process for persons to pursuecleanup of contaminated properties. The Voluntary Cleanup Law provides the TNRCC's administrative andtechnical requirements and conditions necessary for persons to voluntarily clean up sites within this program.The following attributes of the Law encourage lenders, developers, and prospective purchasers to clean upabandoned or under-utilized properties: non-binding voluntary cleanup agreements with the TNRCC,agreement by the TNRCC not to pursue enforcement action on sites which are being voluntarily remediated,and a release to non-responsible parties from liability to the State of <strong>Texas</strong> for cleanup of existingcontamination in areas covered by the Certificate of Completion.Similar to the State Superfund Program, sites are investigated to determine if <strong>groundwater</strong> impacts haveoccurred. If <strong>groundwater</strong> contamination is verified, then the persons conducting the voluntary cleanuppropose response actions to address the contamination. The TNRCC assesses their proposal to ensure thatthe proposed remedy is capable of achieving the goals of the <strong>groundwater</strong> cleanup. Due to the voluntarynature of the program, some sites may withdraw from the program prior to completing restoration of the<strong>groundwater</strong>. These sites are indicated with an activity status of “0". Only sites which pose an imminentthreat to human health or the environment and withdraw prior to completion of the response action arereferred for potential enforcement action to compel the completion of any necessary response actions.Innocent Owner/Operator Program Description. The Innocent Owner/Operator Program was created byamendment to the <strong>Texas</strong> Solid Waste Disposal Act and became effective on September 1, 1997. Theprogram is handled administratively through the Voluntary Cleanup Program. The purpose of the legislativeamendment is to provide liability relief for owners or operators of property that has become contaminated asa result of a release or migration of contaminants from a source or sources not located on or at theowner’s/operator’s property. Also, a person, who, after appropriate inquiry consistent with good commercialor customary practice, did not know or have reason to know of contamination on their property at the time theperson acquired the property is released from liability to the State. The program reviews the siteinvestigation <strong>report</strong> to confirm, through the issuance of a certificate, that the person is an innocent owner oroperator.Corrective Action Program Description. The Corrective Action Section was transferred from theIndustrial and Hazardous Waste Division to the Pollution Cleanup Division on September 1, 1997, in the firstphase of a reorganization to consolidate all remediation functions of the Office of Waste Management into asingle division. The Corrective Action Section oversees remediation activities at a wide range of facilitiesincluding industrial non-hazardous waste unit closures and remediations, RCRA closures and remediations atinterim status and permitted hazardous waste management facilities, and installation restoration programs atactive and closing facilities of the Department of Defense and Department of Energy. Groundwatermonitoring and remediation programs performed by the section are primarily corrective action programs inresponse to confirmed contamination rather than detection monitoring programs. These programs correspondto Programs 5, 6, and 7 of the seven types of programs detailed in the IHW Division program description ofthis <strong>report</strong>.Enforcement Corrective Action. The corrective action component of the Enforcement Division wastransferred to the Pollution Cleanup Division on September 1, 1997. The Enforcement Corrective Actiongroup oversees remediation activities at a wide range of facilities under industrial and hazardous wasteenforcement.44

Status of Groundwater Monitoring Programs. All NPL sites in <strong>Texas</strong> and sites proposed or listed on theState Superfund registry would be subject to the <strong>groundwater</strong> monitoring program described above. Thedetails and extent of the <strong>groundwater</strong> monitoring at each site are, however, highly variable. For example,during the site investigation at the Pesses Chemical NPL site, a boring to 100 feet did not encounter a<strong>groundwater</strong> bearing unit. As a result, monitoring wells were not installed. In contrast, at the OdessaChromium II NPL site, over 400 wells were identified during the water well inventory, and over 300 wellswere sampled for hexavalent chromium. A total of 21 monitor wells were installed during a site investigationwith additional wells installed during the remedial design. Additionally, <strong>groundwater</strong> recovery wells and awater treatment system were installed during active restoration of the aquifer.Status of Groundwater Contamination Cases. There is evidence that at least 26 NPL sites and 22 StateSuperfund sites in <strong>Texas</strong> have contaminated <strong>groundwater</strong>. Many of the State Superfund sites are in theinvestigation stage and the impact on <strong>groundwater</strong> is uncertain. Groundwater contamination has beendocumented at approximately 40 additional sites which have not been selected for either the NPL or the stateregistry. The PCD has been notified of <strong>groundwater</strong> contamination at some of these sites through the spillnotification requirements of <strong>Texas</strong> Water Code, §26.039(b).The Pollution Cleanup Division has a total of 655 <strong>groundwater</strong> contamination case descriptions listed bycounty in Table 1. None of the Division’s cases required notification to local officials under §5.236 of the<strong>Texas</strong> Water Code in 1997. There are 92 Superfund Program cases listed. One case was added to the 1997Superfund Program listing. There are 267 Voluntary Cleanup Program cases listed. There were 149 newcases added in the Voluntary Cleanup Program in 1997. Action was completed (activity status code “6") onsix Voluntary Cleanup Program cases in 1997 and five others were removed for other reasons. There are 198Corrective Action Program cases listed. There were 7 new cases added in the Corrective Action Program in1997. Action was completed (activity status code "6") on one Corrective Action Program case in 1997.There are 98 enforcement corrective action sites.Water Quality DivisionProgram Description. The Water Quality (WQ) Division is responsible for providing scientific leadershipand technical support to promote effective and coordinated management of the water resources within thestate. The WQ Division is responsible for coordinating all water quality planning in the state to meet therequirements set out in the <strong>Texas</strong> Water Code and the federal Clean Water Act. The Division is responsiblefor: determining the appropriate standards of protection to be applied to the surface waters of the state;assessing the extent to which those standards are met on a watershed or estuary basis through monitoring,modeling, and data evaluation; evaluating permits to ensure that they afford an acceptable level ofenvironmental protection; and preventing and reducing surface and <strong>groundwater</strong> pollution throughdevelopment and implementation of management plans. These objectives are achieved through cooperationwith citizens, local planning agencies and districts, municipalities, industry, businesses, river authorities,other state agencies, and the U.S. Environmental Protection Agency.The WQ Division provides technical assistance related to <strong>groundwater</strong> quality issues to all divisions withinthe Office of Water Resource Management and to other Offices and agencies as required. The Divisionconducts <strong>groundwater</strong> protection programs that emphasize both remediation and prevention of contaminationthrough the use of best management practices. The WQ Division also provides administrative support for the<strong>Texas</strong> Groundwater Protection Committee (TGPC). The TGPC is delegated the responsibility of coordinatingthe <strong>groundwater</strong> quality protection activities conducted by all state agencies under the authority of §26.403 of45

the <strong>Texas</strong> Water Code. Mandated responsibilities of the TGPC, as chaired by the Water Policy andRegulations Division and administered by the WQ Division, include the development and implementation ofa comprehensive state <strong>groundwater</strong> protection program (CSGWPP), compiling and publishing the annualJoint Groundwater Monitoring and Contamination Report, publishing a biennial <strong>report</strong> to the Legislatureon the TGPC’s activities, and the development of the state management plan (SMP) for the prevention ofpesticide contamination of <strong>groundwater</strong>.The WQ Division provides technical expertise in the evaluation and designation of <strong>groundwater</strong> managementareas and creation of <strong>groundwater</strong> districts in response to landowner petitions. As the point-of-contact for theTNRCC, the Division reviews all legislation creating <strong>groundwater</strong> conservation districts or altering<strong>groundwater</strong> conservation district law and provides technical comments as required. The Division providestechnical support to <strong>groundwater</strong> districts as resources allow.The WQ Division evaluates municipal and industrial wastewater treatment facilities and sludge disposal andbeneficial use sites for the potential to impact <strong>groundwater</strong>. For sites with pits, ponds, ditches, or lagoons, thefacility's design must meet or exceed design criteria used to prevent <strong>groundwater</strong> contamination, and if animminent potential for such contamination still exists, special provisions are included in the permit requiringadditional preventative measures or the development of <strong>groundwater</strong> monitoring facilities and operations. TheWQ Division is responsible for ensuring that <strong>groundwater</strong> resources are protected during permitting activitiesrelated to municipal and industrial wastewater treatment, concentrated animal feeding operations (CAFOs),and sewage sludge disposal or land application. The WQ Division is charged to prevent unauthorizeddischarges from these permitted facilities. The WQ Division ensures <strong>groundwater</strong> protection by performingtechnical evaluations during the permitting process.Permits issued for irrigation, manure solids spreading, or sludge disposal sites contain special provisions formonitoring soils for selected parameters, controlling application rates and ensuring adequate croppingpractices, to prevent migration of possible contaminants to the <strong>groundwater</strong>. Information submitted inaccordance with these and other permit provisions, and also TNRCC enforcement order requirements, areroutinely reviewed and evaluated. These may include water quality sampling data, self-<strong>report</strong>ed monitoringdata for <strong>groundwater</strong> and soils, cropping plans, and hydrogeologic and soils assessment <strong>report</strong>s.Noncompliances are referred to the Enforcement Division/Water Section for coordination of appropriateenforcement action.The WQ Division administers the regulation of Class V Injection Wells under the federal Safe DrinkingWater Act (SDWA). Class V injection wells include miscellaneous injection wells used for the subsurfacedisposal of certain fluids to usable quality <strong>groundwater</strong> zones. Examples of Class V wells include drainageand agricultural drainage wells; domestic wastewater disposal wells; industrial, commercial, and utilitydisposal wells; aquifer storage, retrieval, and remediation wells; and heat loop wells. Possible pollutants arepesticides, fertilizers, pathogens, metals, and salts. The WQ Division conducts an ongoing inventory of ClassV wells. There were 13,975 Class V wells inventoried as of November 1997. During federal Fiscal Year1997, 99 authorizations (by letter or rule) were granted for Class 347 V wells.The <strong>groundwater</strong> portion of the <strong>Texas</strong> nonpoint source (NPS) program, authorized by Section 319 of theClean Water Act, is implemented within the WQ Division. The Division has responsibility for coordinatingand updating the <strong>groundwater</strong> portions of the NPS assessment <strong>report</strong> and the NPS management plan. Theassessment <strong>report</strong> identifies and categorizes potential and actual <strong>groundwater</strong> nonpoint sources in the state,identifies vulnerable aquifers (utilizing DRASTIC) that have the greatest potential of becoming contaminatedfrom nonpoint sources, and provides a basis for prioritizing NPS activities. The management plan identifies46

state agencies which have jurisdiction for pollution abatement in each category, identifies existing orproposed regulatory programs applicable to cleanup activities in each category, and identifies bestmanagement practices applicable to each category.Through education and technology transfer, <strong>groundwater</strong> NPS public outreach projects promote pollutionprevention activities across county, watershed, or multi-county areas that use a common aquifer for drinkingwater supplies. Through education and planning, citizens and local governments work together to helpprevent pollution of the regional <strong>groundwater</strong> resource. The first step in managing NPS pollution is toidentify potential sources of contamination (PSOCs). Once PSOCs are located, best management practice(BMP) methods to protect <strong>groundwater</strong> resources can be implemented. Some BMPs which may beimplemented include wellhead protection for public water supply systems, TEX-A-Syst for individual orprivately owned water wells, and regional aquifer protection. The regional aquifer protection process expandson the established tools of wellhead protection and begins with TNRCC-initiated meetings to raise publicawareness and gain the cooperation of local individuals and governments.One watershed NPS projects was completed in Fiscal Year 1997 - The Edwards Aquifer Nonpoint SourceBest Management Practices Evaluation Project. Geographic information systems (GIS) techniques were usedto map areas of the Edwards Aquifer that were vulnerable to NPS pollution. Similar regional aquiferprotection projects in the Edwards and Carrizo-Wilcox aquifers have, over the past six years, resulted in thedevelopment of BMP implementation recommendations for over 320 public water supply wells.Status of Groundwater Monitoring Programs. The WQ Division has compiled and maintains theInteragency Pesticide Database (IPD). The database contains the results of <strong>groundwater</strong> monitoring forpesticides, collected from various agencies and other entities that periodically sample <strong>groundwater</strong>. Thedatabase is part of an interagency effort of the TGPC to assess <strong>groundwater</strong> impacts from the normal use ofagricultural chemicals. Analyses of approximately 1,550 samples from approximately 1,350 different wellsare described in the database. Data contained in the IPD indicate that 22 pesticides were detected in 35samples from individual wells and 16 multiple well composite samples. Resampling confirmed the presenceof six pesticides (2,4-D, 2,4,5-T, atrazine, diuron, heptachlor epoxide, and prometon) in 12 wells located ineight counties. Recent data additions, including a large amount of <strong>groundwater</strong> monitoring data from theUSGS National Water Quality Assessment Program, were all negative for the presence of pesticides.The WQ Division is continuing with its initial agricultural chemical monitoring programs as outlined in the<strong>Texas</strong> State Management Plan for Prevention of Pesticide Contamination of Ground Water (SMP) underthe Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), as amended. The monitoring represents theinitial efforts at problem assessment and testing implementation for the SMP. For the past three years, theseefforts have been conducted in the alluvium of the Brazos River under the direction of the Site Selection TaskForce of the Agricultural Chemical Subcommittee.There are a total of 581 facilities permitted as Concentrated Animal Feeding Operations (CAFOs) under thejurisdiction of the Water Quality Division. Of those facilities, approximately 18 are currently required toconduct <strong>groundwater</strong> monitoring. There are approximately 65 wells that are currently monitored at thesefacilities. Monitoring is required under §26.048 of the <strong>Texas</strong> Water Code for all facilities that currentlyutilize a playa for wastewater retention. Monitoring may also be required for permitted facilities under thefollowing circumstances: contested case hearing, enforcement action, and proximity to recharge features.Status of Groundwater Contamination. Cases of confirmed <strong>groundwater</strong> contamination which may not fallunder the jurisdiction of an individual division or agency are tracked by the WQ Division. These cases include47

contamination which has not been directly linked to a singular activity or source; historic enforcement caseswhere <strong>groundwater</strong> contamination is known to exist, but where no further regulatory action is required bylaw, rule, or order; cases which exist that are outside of current regulatory scope; and, cases which areconfirmed in the Interagency Pesticide Database that do not require regulatory action.The Water Quality Division has a total of 47 <strong>groundwater</strong> contamination cases listed in Table 1. The Divisionlisted 46 cases in the 1996 <strong>report</strong>, none of which were dropped in 1997. One additional case was added in1997. Twenty-seven cases were transferred to the WQ Division in 1996: 26 from the <strong>Texas</strong> Department ofAgriculture and one from the Enforcement Division. The cases are listed by county under the division heading"WQD.” None of the Division’s cases required notification to local officials in 1997 under §5.236 of the<strong>Texas</strong> Water Code.Water Utilities DivisionProgram Description. The Public Drinking Water Section of the Water Utilities (WU) Division regulatesthe microbiological and chemical quality of public drinking water, and the construction and operation ofpublic water supply systems, under the authority of Chapter 341, Subchapter C of the <strong>Texas</strong> Health andSafety Code. To accomplish this task, the <strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong> (TNRCC) haspromulgated Rules and Regulations for Public Water Systems (30 TAC § 290.38-§ 290.47) and DrinkingWater Standards Governing Drinking Water Quality and Reporting Requirements (30 TAC § 290.101-§290.120). The U.S. Environmental Protection Agency (USEPA) has also granted the TNRCC primacy forenforcing the National Primary and Secondary Drinking Water Regulations in <strong>Texas</strong>. These federalregulations were promulgated by the USEPA under the authority of the Safe Drinking Water Act as amendedin 1986. Additional amendments occurred in 1991 and 1996.In addition, regulations of the Railroad <strong>Commission</strong> of <strong>Texas</strong> (RCT) require that the TNRCC determine theoccurrence and depth of usable-quality <strong>groundwater</strong> in conjunction with approval of various activitiesregulated by the RCT. These activities include underground injection of oil and gas wastes, plugging andtesting of inactive wells, and exploration and production of oil, gas, and other minerals. These determinationsare required in order to identify the existence of usable-quality <strong>groundwater</strong> resources in relation to theseunderground activities and ensure that proper provisions, such as well casing intervals, are incorporated intopermits and project plans to protect <strong>groundwater</strong> sources. The WU Division provided 18,833 determinationsfor the RCT and the energy industry in Fiscal Year 1997.Status of Groundwater Monitoring Programs. Most chemical and microbiological monitoring of publicdrinking water are performed on water after it has been treated by the public water supply system.Monitoring of untreated <strong>groundwater</strong> is conducted when a new public water supply well is constructed, where<strong>groundwater</strong> is highly vulnerable to microbiological contamination, or when chemical contamination is tracedback to its source.Treated drinking water is sampled at the entry point of new treated water to the drinking water distributionsystem, or at a tap in the distribution system. For many entry point and distribution system samples, thewater analyzed is a blend of water from more than one public water supply well or underground spring. Morethan16,500 samples of treated drinking water were collected for chemical analysis in 1997.The Water Utilities Division monitors 6,760 public water supply systems in its regulatory program. Of thesepublic water systems, 5,650 use <strong>groundwater</strong> as a primary or secondary source of drinking water. The 5,65048

systems have 8,131 entry points supplying <strong>groundwater</strong> from 12,073 public water supply wells, 13underground springs, and two infiltration galleries.Currently, all chemical analyses under this program are performed by the <strong>Texas</strong> Department of Health Bureauof Laboratories or the Lower Colorado River Authority Laboratory. Microbiological analyses are conductedby the <strong>Texas</strong> Department of Health Bureau of Laboratories and by 85 city or county health departmentlaboratories.Status of Groundwater Contamination. The first three-year, standardized chemical monitoring period forpublic drinking water ended on December 31, 1995. During this period, samples for inorganic and volatileorganic chemical analysis were taken from all community and non-transient, non-community public watersupply systems. Non-transient, non-community water systems are those utilities that regularly providedrinking water to at least 25 of the same persons at least six months out of the year (for example, schools,prisons, factories). The first year of the second three-year period was 1996. During 1996 all systems servingmore than 3,300 people were scheduled for sampling. The second year of the second three - year period was1997 and systems serving between 500 and 3,300 people were scheduled for sampling.Twenty-four cases were listed in Table 1 of the 1996 <strong>report</strong>. During 1997, public water supply systems hada total of 843 detections of organic chemical contaminants. After confirmation sampling was completed, thewater in three <strong>groundwater</strong> systems were found to exceed one or more Maximum Contaminant Levels. Thesehave been added to Table 1 but notification to local officials under TWC, §5.236 was not required. Table 1now lists a total of 23 cases under the header "WUD.” No further action was required on four cases(1011908, 1100035, 1910010, and 2460003) listed in the 1996 <strong>report</strong> and these have been dropped from the1997 table.49

<strong>Texas</strong> Water Development BoardProgram Description. The <strong>Texas</strong> Water Development Board (TWDB) conducts an active <strong>groundwater</strong>resource assessment program. Boundaries and various characteristics for all of the State's major and minoraquifers have been identified and include water availability, recharge, and other geologic information. Inaddition, major entities using <strong>groundwater</strong> have been identified within each river basin together with theaquifer(s) being utilized, the quality of water being developed, and the quantity of water needed for a 50-yearplanning period. To accomplish this, the TWDB collects data on the State's aquifers which include theoccurrence, availability, quality, and quantity of <strong>groundwater</strong> present and the current and projected demandson <strong>groundwater</strong> resources. This is done through the statewide <strong>groundwater</strong> level measurement program,<strong>groundwater</strong> quality sampling program, and <strong>groundwater</strong> studies.The purpose of the <strong>groundwater</strong> quality sampling program is to: 1) monitor changes, if any, in the quality of<strong>groundwater</strong> over time; and 2) establish, as accurately as possible, the baseline quality of <strong>groundwater</strong>occurring naturally in the State's aquifers. The <strong>groundwater</strong> quality monitoring program is accomplished inaccordance with procedures established in the TWDB’s Field Manual for Ground Water Sampling, insupplemental samples analyzed on Hach instruments, and by obtaining data collected by other entities such asthe <strong>groundwater</strong> conservation districts, U.S. Geological Survey, and other State/Federal Agencies.Collected data are processed and stored, by state well number, in the TWDB's <strong>groundwater</strong> database.Indicators of sample reliability, collecting entity, and analytical laboratory are also stored along with sampleresults. Since wells are identified with latitude and longitude, GIS systems can spatially present water-qualitydata throughout the state. Also, the program allows eligible entities to purchase water-quality lab equipmentthrough Agricultural Conservation grants funded by the TWDB. Selected constituents <strong>report</strong>ed by grantrecipients are also included in the database.Status of Groundwater Monitoring Programs. The TWDB sampled approximately 880 sites in 1997.These sites, along with 1,000 additional chemical analyses obtained from cooperative entities, comprise theambient <strong>groundwater</strong> quality sampling program. As data are obtained from cooperators, the actual number ofanalytical results obtained from sites sampled in 1997 will be greater. Water-quality data collected under thisprogram are entered into the TWDB <strong>groundwater</strong> database and filed in the TWDB's Located Well Data fileroom. These sites have accurate latitude and longitude data for use with GIS equipment. Figure 7 indicatesthe number of results conducted in 1997 (880 sites sampled by TWDB staff and analyzed by LCRA lab)that exceeded the MCLs for selected constituents. In addition to the constituents listed in Figure 7, samplesare analyzed for the major cations, alkalinity, ammonia-N, Keldahl-N, silica, strontium, and eight additionaltrace elements.The TWDB completed sampling of the Blaine, Seymour, Gulf Coast, Woodbine, Blossom, Nacatoch, Lipan,Hueco & Mesilla Bolson, and Bone Spring-Victorio Peak aquifers in 1997. An attempt to complete theCarrizo-Wilcox, Queen City, Edwards (BFZ), and Sparta aquifers will be made in 1998.The TWDB is not a regulatory agency and has no <strong>groundwater</strong> protection regulatory programs.Consequently, the TWDB does not have regulatory jurisdiction over contamination cases detected by theagency. Any detection of significant contamination is referred to the proper regulatory agency. Theaccompanying map (Figure 8) shows the location of the 880 sites sampled in 1997.51

Figure 7. <strong>Texas</strong> Water Development Board Results of Analyses - 1997Water samples collected by the TWDB (880) and analyzed by the LCRA laboratory in 1997 showing thenumber of concentrations greater than the Maximum Contaminant Level (MCL).Category Constituent MCL Number greater than MCLPrimary Antimony 6 uG/L 0Arsenic 50 uG/L 6Barium 2 MG/L 2Beryllium 4 uG/L 0Cadmium 5 uG/L 0Chromium 100 uG/L 0Fluoride 4 MG/L 12Lead 5 uG/L 11Mercury 2 uG/L 0Nickel 100 uG/L 3NO + NO (N) 10 MG/L 632 3Selenium 50 uG/L 70Thallium 2 uG/L 3Secondary Chloride 300 MG/L 214Copper 1 MG/L 3Fluoride * 2 MG/L 68Iron 0.3 MG/L 142Manganese 50 uG/L 158pH 7.0 149Sulfate 300 MG/L 120Dissolved Solids 1000 MG/L 237Zinc5 MG/L1* Greater than 2.0 mg/L to 4.0 mg/L.Of the 880 water analyses, 50 percent had at least one constituent over drinking water standards.52

Railroad <strong>Commission</strong> of <strong>Texas</strong>Oil and Gas DivisionClass II Underground Injection Control Program Description. The Railroad <strong>Commission</strong> of <strong>Texas</strong>(RCT) regulates the disposal of oil and gas wastes by injection (Statewide Rule 9), the injection of fluid forenhanced oil recovery (Statewide Rule 46), and the underground storage of hydrocarbons (Statewide Rules95, 96, and 97). By December 31, 1997, the inventory of active wells in these categories was 34,960 out of52,767 currently permitted wells. The RCT’s Underground Injection Control Program for these categories ofwells (Class II) is administered under authority issued by EPA under the Safe Drinking Water Act. The focusof the program is the protection of underground sources of drinking water. Class II wells must meetpermitting standards and be tested and monitored to demonstrate mechanical integrity.Class III Brine Mining Injection Well Program Description. Brine mining injection wells (Class III) aretypical of solution mining wells. Temporary permitting procedures are in effect to regulate brine miningoperations. EPA approval of the RCT Class III Brine Mining Injection Well Program is pending. Uponapproval, Statewide Rule 81 will require the wells to be permitted, will set the standards and procedures forpermit issuance, and will set forth standard permit provisions.Currently, 79 brine mining injection facilities with a total of 97 brine mining injection wells are operating in<strong>Texas</strong>. Of these 79 facilities, 70 are required to monitor <strong>groundwater</strong> quality and submit <strong>groundwater</strong>monitoring <strong>report</strong>s using 79 total wells for sampling. Operators are required to install a monitoring wellapproximately 150 feet down hydraulic gradient from the brine mining injection well. The monitoring wellmust be completed in the water-bearing formation from which representative water samples can be easilyretrieved. Samples are collected and analyzed for electrical conductance monthly, and the results submitted tothe RCT quarterly. If results exceed the established background level for electrical conductance, monitorsamples must be taken twice a week and investigative and corrective actions must be initiated.Sampling on a twice-a-month basis is conducted on eight brine mining injection facilities. The samplingfrequency was lowered because of relatively low and consistent conductivity values. The operators of thefacilities have performed successful mechanical integrity tests on these brine mining injection wells during thepast year.Statewide Rule 8 Water Protection Program Description. Through the Statewide Rule 8 Water ProtectionProgram, the RCT regulates the surface storage and disposal of oil and gas wastes and brine retentionfacilities associated with brine mining and underground hydrocarbon storage. Rule 8 requires permits for pitsand disposal methods that are not specifically authorized by the rule. There are currently 47 land farmingfacilities permitted for disposal of oil and gas waste and 4,824 pits permitted for storage or disposal of oiland gas wastes or retention of brine. Of the 4,824 permits, approximately 45 percent authorize pits to be usedfor short-term storage (48 to 72 hours) of produced water during emergency situations. The remainingpermits are for various categories of pits, including saltwater disposal pits, collecting pits, skimming pits,brine pits, brine mining pits, and drilling fluid and gas plant evaporation/retention pits. Many of the pitpermits require liners and leak detection systems. Rule 8 permits may also contain <strong>groundwater</strong> monitoringrequirements in certain circumstances. The RCT monitors 109 wells associated with 52 disposal sitesregulated under Rule 8. No monitoring wells were determined to be affected by contamination in 1997.54

The RCT also responds to citizen complaints regarding alleged <strong>groundwater</strong> contamination or allegedunauthorized activities that may endanger <strong>groundwater</strong>. RCT response may include investigation andsampling by the appropriate district office.Oil-field Cleanup Program Description. Oil-field cleanup is under the jurisdiction of the RCT and isregulated by Statewide Rule 8, Statewide Rule 91, and RCT Special Orders. If <strong>groundwater</strong> contaminationoccurs at a site, the responsible party is required to remediate to acceptable levels. Responsible parties mayvolunteer remedial action or cleanup may be required by legal action. When investigation and research cannotlocate a responsible party, the Site Remediation Section of the Oil and Gas Division’s EnvironmentalServices will oversee the remediation of the <strong>groundwater</strong> contamination with state funds. Monitoring wellsare associated with all cases involving <strong>groundwater</strong> contamination.Status of Groundwater Contamination. There are 77 <strong>groundwater</strong> contamination cases, listed by county, inTable 2 under the heading RCT. The 77 cases are located in 49 counties. There are 12 new cases under RCTregulation which have been added to the <strong>report</strong> in 1997. Activities were completed on seven cases which weredropped from the 1997 <strong>report</strong>. No cases were referred from other agencies; and the rest of the new cases weredue to self-<strong>report</strong>ing, complaints, and routine investigations. For the 1997 <strong>report</strong>, the enforcement status haschanged in 10 cases from the 1996 <strong>report</strong>.Surface Mining and Reclamation DivisionProgram Description. The Surface Mining and Reclamation Division of the RCT is authorized to enforcestate laws and regulations consistent with the <strong>Texas</strong> Surface Coal Mining and Reclamation Act and the <strong>Texas</strong>Uranium Surface Mining and Reclamation Act. As part of the <strong>groundwater</strong> information required in theregulations, determination of the quality of subsurface water includes the analysis of common inorganic<strong>groundwater</strong> constituents plus certain trace metals. Monitoring plans for pre-mining, mining, and post-miningconditions are required, normally on a three-month basis, in order to track variations in water-qualityparameters.Lignite coal is presently being mined by 11 different companies at 25 permitted sites; two sites are underreclamation operations. All uranium activities consist of the reclamation operations at four sites under threedifferent companies.Groundwater monitoring, both sampling for water-quality analysis and measurement of water level, isrequired for one year on a quarterly basis for the baseline information that is submitted with the initial permitapplication. In addition, the mining companies are required to submit plans for quarterly <strong>groundwater</strong>monitoring during mining and post-mining reclamation activities for RCT review and approval. Monitoring isdone by or on behalf of the mining companies, who are required to submit the analytical results to the RCTon a periodic basis. The baseline quarterly samples include the following parameters for chemical analysis, inmilligrams per liter:55

CalciumMagnesiumSodiumPotassiumIron (Total and Dissolved)Manganese (Total & Dissolved)Total Dissolved SolidsBicarbonateCarbonateSulphateChlorideFluorideNitrate, as NitrogenAn annual sample is analyzed for the following trace metals, in milligrams per liter:Aluminum Chromium Molybdenum CadmiumArsenic Copper Zinc MercuryBoron Lead SeleniumContinued quarterly samples during the entire permit period (mining and reclamation) include the chemicalanalysis of at least the following parameters:SulfateChlorideTotal Dissolved SolidsBicarbonateIron (Total & Dissolved)Manganese (Total & Dissolved)Monitoring by RCT is usually conducted only during investigations for some specific reason, such ascontamination complaints. Chemical and physical analysis of samples collected by the RCT field enforcementpersonnel is normally completed at the RCT laboratory in Austin. A few contamination complaints areinvestigated annually by RCT field personnel. To date, none have been verified as confirmed contaminationcases.Status of Groundwater Monitoring Programs. All of the mining facilities, including those underreclamation operations, are subject to <strong>groundwater</strong> monitoring. It is estimated that about 250 wells are beingsampled four times per year (approximately 1,000 samples). To date, results of the sampling program do notindicate any contamination that is attributable to the mining and reclamation activities has occurred.Various commercial laboratories perform chemical analyses for the mining companies. In addition, the RCThas no control over the actual sampling and sample preparation procedures, except recommendation ofvarious accepted procedures (EPA, USGS, etc.). Therefore, the RCT has no direct control over the quality ofthe chemical analyses <strong>report</strong>ed by the companies. Methods for evaluating the results of chemical analyses(ionic balance) are being exercised by the mining companies and the RCT.Status of Groundwater Contamination. There have been no confirmed contamination cases in the SurfaceMining Program. Groundwater impacts related to the initial and current mining activities are almost totallyassociated with aquifer-head drawdowns and declines. It may take years to decades for the spoils areas tobecome resaturated and the <strong>groundwater</strong> contributions from the spoils areas to start affecting adjacent56

aquifers and stream baseflow. At that time, the preventive nature of the RCT permitting and enforcementactivities should minimize the type of <strong>groundwater</strong> contamination expected from the spoils areas.57

<strong>Texas</strong> Department of HealthBureau of Radiation Control Program Description. The <strong>Texas</strong> Department of Health (TDH), Bureau ofRadiation Control (BRC), regulates radioactive materials in <strong>Texas</strong> under the authority of the Atomic EnergyAct of 1954 as amended. On September 1, 1993, upon the creation of the <strong>Texas</strong> Natural ResourceConservation <strong>Commission</strong> (TNRCC), all regulation of uranium recovery and radioactive waste disposal wastransferred to that agency. In 1997, the 75th Legislature transferred that responsibility back to the BRC.Status of Groundwater Monitoring Programs. The BRC monitors <strong>groundwater</strong> for radionuclides on aroutine basis at several facilities in <strong>Texas</strong>. Intermittently the BRC will sample <strong>groundwater</strong> as a result of anincident, complaint, or situation which leads the BRC to believe there may be <strong>groundwater</strong> contamination.Status of Groundwater Contamination. To date, <strong>groundwater</strong> which the BRC currently monitors has notbeen found to be contaminated with radionuclides.58

<strong>Texas</strong> Department of AgricultureProgram Description. The <strong>Texas</strong> Department of Agriculture (TDA) has lead authority for pesticideregulation in <strong>Texas</strong>. The TDA recognizes certain pesticides as potential <strong>groundwater</strong> contaminants and has aprimary responsibility in preventing unreasonable risk to human health and the environment from the use ofpesticides. The agency conducts a variety of activities designed in part or entirely to reduce the potential of<strong>groundwater</strong> contamination by pesticides:< Product Registration: All pesticide products sold and used in <strong>Texas</strong> must be registered with theTDA. This process ensures these products have met all USEPA requirements for use.< Pesticide Label Compliance and Enforcement: The agency has responsibility and authority underthe <strong>Texas</strong> Agricultural Code to enforce pesticide labels, which include directions and precautionsthat directly or indirectly reduce the potential of <strong>groundwater</strong> contamination.< Pesticide Applicator Training: All prospective users of restricted-use or state-limited-use pesticidesare required to obtain an applicator’s license. This process includes training in the proper and legaluse of pesticides, applicator testing, and continuing education.< Risk Assessment: The TDA maintains a program to assess the potential impacts of agriculturalchemicals on human health and the environment, including <strong>groundwater</strong> quality. Pesticide relatedwater quality issues are directed by this program.< State Management Plan for Prevention of Pesticide Contamination of Ground Water (SMP): TheTDA serves as chair of the SMP Task Force, under the authority of the <strong>Texas</strong> GroundwaterProtection Committee, which is charged with the responsibility to develop the generic and pesticidespecificSMPs for <strong>Texas</strong>.These activities are conducted in order to ensure compliance with federal and state laws and regulationsrelating to the use of pesticides and the protection of <strong>groundwater</strong> resources. In addition, the TDA alsoprovides support and assistance in all state environmental projects where agricultural pesticides use andregulation are of concern.Status of Groundwater Monitoring Programs. The TDA does not routinely conduct <strong>groundwater</strong>monitoring for pesticides. The agency relies on monitoring data generated by the <strong>Texas</strong> Natural ResourceConservation <strong>Commission</strong> and <strong>Texas</strong> Water Development Board to identify sites of concern. In addition,monitoring data of federal, local, and private entities are also evaluated when available. At that point, theTDA may address the situation through any or all of its regulatory activities as well as coordinate preventionefforts with other government, educational, and/or private entities.Status of Groundwater Contamination. Seventy-five cases of <strong>groundwater</strong> contamination weredocumented by the <strong>Texas</strong> Department of Agriculture during the 1987 and 1988, and 1990 <strong>groundwater</strong>monitoring surveys. Results of the 1987 and 1988 studies are <strong>report</strong>ed in Testing for Pesticide Residues in<strong>Texas</strong> Well Water (TDA, 1989), and the 1990 results are presented in the 1990 - 1995 Joint GroundwaterMonitoring and Contamination Reports. No violations of the <strong>Texas</strong> Agricultural Code were found in any of59

the 75 cases, and no further action was required by the TDA. The cases were referred to the TNRCC forpossible action under the <strong>Texas</strong> Water Code in 1996.60

<strong>Texas</strong> State Soil and Water Conservation BoardProgram Description. The <strong>Texas</strong> State Soil and Water Conservation Board was created by House Bill 20,Acts of the 46th Legislature in 1939. The State Soil and Water Conservation Board is charged with theoverall responsibility for administering and coordinating the state*s soil and water conservation program withthe state*s soil and water conservation districts. Title 7, Chapter 201 and 203 of the Agriculture Code of<strong>Texas</strong> contain the provisions of law pertaining to soil and water conservation. The State Soil and WaterConservation Board is named as the agency responsible for implementing the constitutional provisions andstate laws relating to the conservation and protection of soil resources. Section 201.026 designates the StateSoil and Water Conservation Board as the lead agency relating to abating agricultural and silviculturalnonpoint source pollution. Pursuant to statutory authority, the State Soil and Water Conservation Boardrepresents the state before EPA on all matters pertaining to agricultural and silvicultural nonpoint sourcepollution.The Board has a continuing assessment component of its management program designed to assess the impactof agricultural nonpoint sources on water quality, including <strong>groundwater</strong>, within available resources. TheBoard has the authority to establish a water quality management plan program in areas identified as having,or having the potential, to develop agricultural or silvicultural nonpoint source water quality problems. Theprogram provides, through local soil and water conservation districts, for the development, supervision, andmonitoring of individual water quality management plans for agricultural and silvicultural lands. Such plansmay involve the implementation of best management practices, education and technical and financialassistance commensurate with the problem or potential problem. The Board will work with local soil andwater conservation districts, within available resources, to utilize a water quality management plan programin areas where a chemical from agricultural or silvicultural sources is identified as a nonpoint source<strong>groundwater</strong> contaminant. This program will provide technical and possible financial incentive to individualagricultural or silvicultural activities for the development and implementation of site specific water qualitymanagement plans that abate nonpoint source pollution. Each plan must be developed, maintained andimplemented under rules and criteria adopted by the Board in order for the plan to achieve and retain certifiedstatus.The Board*s nonpoint source management program also has an educational component designed to deal withall aspects of agricultural nonpoint sources of pollution including agricultural chemicals. As part of itsnonpoint source management educational component, the Board is developing and implementing aneducational program primarily aimed at agricultural producers. The local soil and water conservation districtsinterface with individual farmers and ranchers as a vital link in the education process. A significant part of theeducational component can and will be geared to informing the public in general about nonpoint sourcemanagement in <strong>Texas</strong>.As currently defined, misuse or accidents involving agricultural chemicals are considered point sourcepollution. The Board has no statutory authority in the area of point source pollution. Therefore, the Board willuse its resources to educate and encourage farmers and ranchers in the importance of proper use ofagricultural chemicals. In instances of point source agricultural chemical pollution, such as misuse oraccidents or instances where it appears that label modifications are needed, the Board cooperates with theagency having regulatory authority. Provisions for referring to the <strong>Texas</strong> Department of Agriculture cases ofsuspected chemical misuse, as well as provisions of seeking label modifications where deemed necessary,have been conducted since 1977.61

The Board conducts regularly scheduled meetings which are open to the public. All business of the Board isconducted in a manner consistent with the Open Meetings Act. The Board has conducted <strong>joint</strong> publicmeetings with the TNRCC to obtain public input into all phases of its nonpoint source management program.Additionally, the Board participates in reviewing the effectiveness of the <strong>Texas</strong> Groundwater ProtectionCommittee*s generic <strong>Texas</strong> State Management Plan for Prevention of Pesticide Contamination of GroundWater to determine when there are needed modifications and revisions.Status of Groundwater Monitoring Programs. No <strong>groundwater</strong> monitoring projects were <strong>report</strong>ed by the<strong>Texas</strong> State Soil and Water Conservation Board for 1996. The Board continues to participate with theAgricultural Chemicals Subcommittee of the <strong>Texas</strong> Groundwater Protection Committee in the developmentof a site-specific monitoring plan for atrazine.62

<strong>Texas</strong> Alliance of Groundwater DistrictsProgram Description (General). The <strong>Texas</strong> Alliance of Groundwater Districts (TAGD), formerly the <strong>Texas</strong>Groundwater Conservation Districts Association, was formed on May 12, 1988. Its membership is restrictedto Groundwater Conservation Districts of <strong>Texas</strong> who have the powers and duties to manage <strong>groundwater</strong> asdefined in Chapter 36 of the <strong>Texas</strong> Water Code. TAGD is organized exclusively for charitable, educational,or scientific purposes within the meaning of Section 501 (c) (3) of the Internal Revenue Code. As such it canaccept tax exempt donations and use these donations to educate the public to the growing need for waterconservation and <strong>groundwater</strong> protection.The purpose of TAGD is to educate the public and further <strong>groundwater</strong> conservation and protectionactivities, and to provide a means of communication for the exchange of information between individualdistricts as well as the general public. The TAGD maintains contact with members of the private sector andvarious local, state, and federal officials and their agencies in order to obtain timely information on activitiesand issues relevant to <strong>groundwater</strong> districts. To date, there are 29 district members of the <strong>Texas</strong> Alliance ofGroundwater Districts. A map and legend showing <strong>groundwater</strong> conservation district members of the TAGDare included in Appendix 6. Contacts for the <strong>groundwater</strong> conservation districts are listed in Appendix 7.The districts are created by the Legislature or by the <strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong> withthe purpose and responsibility of preserving and protecting <strong>groundwater</strong>. Groundwater districts can becreated by one of three procedures: (1) special water districts can be established through action of thelegislature; (2) districts can be created through a petitioning process filed with the TNRCC by propertyowners based on Section 36.013 of the <strong>Texas</strong> Water Code; and (3) districts can be created in priority<strong>groundwater</strong> management areas through procedures initiated by the TNRCC. In the last case, extensive localparticipation is included through management advisory committees. Districts are local or regional in theirjurisdiction and have, for the most part, elected boards of directors. Among their legislatively grantedauthorities is the power to monitor <strong>groundwater</strong> quality. A number of districts also have the authority to bringcivil court proceedings for injunctive relief against an entity causing <strong>groundwater</strong> contamination.Status of Groundwater Monitoring Programs (General). District <strong>groundwater</strong> monitoring programs areprimarily of a reconnaissance nature. Most programs are designed to track water quality trends and identifypossible contaminants with minimal expenditure of resources. Generally the sampling and analyticalprocedures and equipment employed are less sophisticated and accurate than the sampling and laboratoryprocedures required to document or prove contamination. However, some districts have monitoring programswith highly accurate and sophisticated sampling and laboratory procedures similar to those of the <strong>Texas</strong>Water Development Board. These districts are monitoring any changes in ambient or natural water qualityconditions on a long-term basis. Groundwater studies of specific areas, contaminants, or constituents are alsoconducted by some districts. District <strong>groundwater</strong> quality monitoring can be used to identify problems whichmay then be referred to appropriate state agencies for more detailed investigation and analysis.Status of Groundwater Contamination (General). There are 18 cases of <strong>groundwater</strong> contamination<strong>report</strong>ed by the members of the <strong>Texas</strong> Alliance of Groundwater Districts listed in Table 3 under theappropriate heading to indicate the individual district. The Barton Springs/Edwards Aquifer ConservationDistrict (BS/EACD) has 17 cases listed and the Evergreen Underground Water Conservation District(EUWCD) has one case listed. No cases were added in 1996 and one case, previously listed by the SandyLand Underground Water Conservation District, was dropped from the 1995 listing.63

Barton Springs/Edwards Aquifer Conservation DistrictStatus of Groundwater Monitoring Programs. The Barton Springs/Edwards Aquifer ConservationDistrict monitors the status of the Barton Springs segment of the Edwards aquifer in parts of four countiesincluding portions of Travis, Hays, Bastrop, and Caldwell counties. District staff measure water levels,collect water samples, and perform water-quality analysis on existing and newly drilled wills within thedistrict. Field parameters of pH, conductivity, temperature, and turbidity are measured using a Horiba U-10.A small laboratory has been equipped by the district to measure the presence and absence of coliformbacteria, count the number of indicator coliform colonies, and measure levels of nitrate, iron, chloride,fluoride, and sulfate using a Hach DR 2000 spectrophotometer. Some samples are submitted to a contractedlaboratory for a more comprehensive analysis. From September 1996 through August 1997, 79 <strong>groundwater</strong>samples were collected and analyzed. The district has received grant support to perform comprehensivesampling aquifer wide in 1999 and 2000.An environmental <strong>groundwater</strong> pumping system was acquired by the district in 1995 with partial fundingfrom the <strong>Texas</strong> Water Development Board. The pumping system uses a Gundfos environmental pump and ahydraulic lift to lower and raise the hose up to depths of almost 300 feet. The pumping system allowedsamples to be taken from wells which are equipped with pumps.The district conducts continuous monitoring of water levels in ten wells to determine drought triggerconditions. Three of the ten wells are equipped to continuously measure electrical conductivity to indicatechanges in water quality. The equipment installed in nine of the ten wells were funded in part by the <strong>Texas</strong>Water Development Board. The tenth well, near Barton Springs, is maintained by the U.S. GeologicalSurvey.During March 1994, the district performed intensive <strong>groundwater</strong> sampling as part of a water-research studyfunded in part by the <strong>Texas</strong> Water Development Board. District staff sampled 13 wells and springs tocharacterize the water source and measure levels of trace metals, nutrients, petroleum hydrocarbons,radionuclides, pesticides, and herbicides that may be present. The results were incorporated into a <strong>report</strong>submitted to the <strong>Texas</strong> Water Development Board entitled Barton Springs/Edwards Aquifer Hydrogeologyand Groundwater Quality.Status of Groundwater Contamination. From September 1996 through August 1997, indicator bacteriawere measured in 38 water samples using colony counts for total coliform and E. coli. Nine of the 38samples showed some colonies of total coliform, up to 504 colonies per 100 ml. Only six of the samplescontained E. coli., up to 107 colonies/100 ml. Twenty-nine water samples were tested for the presence orabsence of total coliform and E. coli., nine of which served as verification for the colony count results. Noneof the wells sampled in the fresh-water portion of the Edwards aquifer exceeded state drinking waterstandards for nitrate, sulfate, chloride, or fluoride.Well 58-50-2CW was sampled on August 7, 1997 and resampled on September 10, 1997. The well showedten colonies of total coliform with three colonies of E. coli. on the initial sampling date, and 234 colonies oftotal coliform with no E. coli, on the second sampling date. Hydrogen-sulfide producing bacteria weredetected in the September 10 sample. Nitrate levels measured 2.4 and 3.1 mg/l, which is elevated for typicalEdwards aquifer levels. A split of the September 10 sample submitted to a contract laboratory measuredammonia nitrate levels of 0.079 mg/l and petroleum hydrocarbon levels of 0.46 mg/l. Using <strong>groundwater</strong>tracers, the well was hydraulically connected to a recharging sinkhole about a mile away that receives urbanrunoff. A gasoline sheen was observed discharging from a culvert pipe just upstream of the recharge feature.64

Prior to the plugging of six monitor wells for a leaking petroleum storage tank site, one of the wells, 58-50-1P2 was sampled on June 6, 1997. The well water represented shallow perched <strong>groundwater</strong> of the EdwardsAquifer. The sampled water contained a visible free-phase petroleum product; 1.48 mg/l combinedconcentrations of benzene, xylenes, toluene, and MTBE; and 0.0833 mg/l of phenols.The Barton Springs/Edwards Aquifer Conservation District has a total of 19 cases listed in Table 3 under theheading “BS/EACD.” Two new cases were added in 1997.Coke County Underground Water Conservation DistrictThe Coke County Underground Water Conservation District serves all of Coke County. The district office isin Robert Lee. The first priority of the district was to locate all of the water wells within the district to identify<strong>groundwater</strong> problems. This project is nearing completion. The district monitors water quality and waterlevels on selected wells. A water-quality monitoring network of 40 wells has been established. To date, 34wells have been sampled and analyzed by a commercial laboratory for fourteen water-quality parameters.Each of these wells are sampled annually and analyzed in the district's in-house laboratory for pH,conductivity, chlorides, sulfates, hardness, nitrates, and an estimate of TDS. Each new well drilled in thedistrict is also sampled and analyzed for the above parameters.Some water wells in the network are located near commercial salt water disposal facilities. These wells arespecifically sampled for chlorides to determine if any contamination of fresh water from oil field related saltwater is occurring. In addition, the district monitors water quality from several monitor wells located in andaround areas of water flooding related to secondary recovery petroleum production activities.Dallam County Underground Water Conservation District No. 1The Dallam County Underground Water Conservation District No. 1, headquartered in Texline, covers mostof northern Dallam County. The mission of the district, as set forth by the district’s board of directors andstate law, is to ensure that quality water conservation and stewardship practices are followed.The district issues well-drilling permits. Water wells must be in compliance with district requirements forspacing and size. The district seeks out abandoned water wells which may need to be properly covered forsafety and to prevent pollution. The district monitors for the waste of <strong>groundwater</strong>, taking action as needed toprevent waste. The district will study the need, if any, for the testing of <strong>groundwater</strong> quality with respect topollution.65

Edwards Aquifer AuthorityThe Edwards Aquifer Authority encompasses part of an eight-county area of South Central <strong>Texas</strong>, includingHays, Comal, Caldwell, Guadalupe, Bexar, Medina, Atascosa, and Uvalde counties.The Authority was created by the <strong>Texas</strong> Legislature in 1993 to manage, preserve and protect the Edwardsaquifer. The Legislature mandated the Authority replace the Edwards Underground Water District (EUWD)and be governed by an appointed board. In 1993, U.S. Department of Justice objections to the appointedboard held up implementation of the statute. In 1995, the Legislature passed another bill to replace theappointed Authority directors with an elected board of directors. In August 1995, the Medina CountyUnderground Water Conservation District filed a lawsuit alleging the Authority statute was unconstitutional,and in October of that year, a State District Court judge ruled in favor of the Medina District. On June 28,1996, the Supreme Court ruled the Authority statute was not unconstitutional and the Authority beganoperation.The Authority is governed by a 17-member board of directors, with voting members elected to represent the15 districts across the region, and two non-voting members appointed by other governmental entities.Directors represent agricultural, municipal, spring, and downstream user groups. The Legislature also createdthe South Central <strong>Texas</strong> Water Advisory Committee to interact with the Authority when issues related todownstream water rights are addressed.The Legislature mandated the Authority take all necessary measures to effectively control the resource toprotect domestic and municipal water supplies, the operation of existing agriculture and industries, terrestrialand aquatic life, and the economic development of the region. In January 1997, the board of directors adoptedthe following mission statement: “The Authority is committed to manage and protect the Edwards aquifersystem to ensure the entire region of a sustainable, adequate, high quality, and cost effective supply of water,now and in the future.”Status of Groundwater Monitoring ProgramsThe Authority, in cooperation with the United States Geological Survey (USGS) and the <strong>Texas</strong> WaterDevelopment Board (TWDB), has conducted an annual systematic program of water-quality data collectionsince 1968. Through this cooperative effort, the Authority (and the EUWD) has maintained a network ofmonitoring wells and surface water sites for gathering water-quality data across the entire Edwards aquiferarea. More than 50 wells are sampled each year and analyzed for more than 90 selected properties andconstituents, including inorganics, nutrients, organic carbon, minor elements, pesticides, herbicides, andvolatile organic compounds. Analyses of these data have been used by the Authority to monitor changes inaquifer water quality.In 1997, the Authority collected water-quality samples from approximately 60 wells. These samples wereanalyzed for selected water-quality properties and both inorganic and organic chemical constituents. All wellsamples analyzed in 1997 surpassed federal drinking water standards as regulated under the Safe DrinkingWater Act. Overall, results of the 1997 water-quality sampling and analysis program illustrate the continuedexcellent quality of Edwards aquifer water.The dynamics of the fresh water/saline water interface, or bad water line, are also monitored at 18strategically-located wells. Water chemistry in the Edwards aquifer has been monitored periodically since the1930's. In 1985, the EUWD, in cooperation with the USGS, the TWDB, and the San Antonio Water System,66

egan a research study of the fresh water/saline water interface. A series of seven wells were drilled into theSan Antonio area that transect this interface to detect changes in water quality as hydraulic head in the aquiferchanges. Additional transects in the New Braunfels and San Marcos areas consist of six wells and five wells,respectively. As part of the water-quality program, staff collects and analyzes monthly and other periodicsamples. Other samples are collected when certain spring-discharge criteria are met. During the study period(1986 to present), data indicate normal changes in the aquifer water level have little effect on the waterquality in wells directly adjacent to the fresh water/saline water interface.The Authority publishes an annual Edwards aquifer hydrologic <strong>report</strong> that contains water-quality data fromthe data collection network. No new <strong>groundwater</strong> contamination cases were <strong>report</strong>ed by the Authority during1997.The Authority also operates 25 continuous water-level monitoring wells and makes monthly measurements at17 additional wells as part of a water-level data collection program. Periodic water-level measurements froma variety of wells have been compiled since 1932 in the San Antonio area of the Edwards aquifer region.Water-level measurements made in 1997 have been <strong>report</strong>ed in the hydrologic <strong>report</strong> for that year.Emerald Underground Water Conservation DistrictThe Emerald Underground Water Conservation District encompasses all of Crockett County, an area of over2,806 square miles. The district's office is located in Ozona, and includes an in-house laboratory capable ofanalyzing ten water quality parameters as well as the presence of coliform and fecal coliform bacteria.At the present time, the district has 44 <strong>groundwater</strong> quality monitor wells which are sampled and analyzedannually for 11 parameters by an outside commercial laboratory. These wells are evenly spaced throughoutthe district, as well as in strategic problem areas involving salt-water disposal, water flooding, andconcentrated petroleum production. No significant parameter changes were detected in the analyses of these44 wells in 1977.To date, the district has analyzed <strong>groundwater</strong> quality on 217 domestic wells, and analyzes water quality oneach producing well registered within the district. This program helps establish an overall baseline of<strong>groundwater</strong> quality throughout the district and will aid in pinpointing any future <strong>groundwater</strong> qualityproblems. In addition, the district, in cooperation with the <strong>Texas</strong> Water Development Board, annuallymeasures and records water levels in 28 wells throughout the district. The 1997 measurement of these 28wells showed an average decline of 0.6869 feet from the 1996 measurement. In August of 1997, the <strong>Texas</strong>Water Development Board installed two water level recorders in Crockett County. The recorders wereinstalled in close proximity to two of the well fields that supply the town of Ozona with its public drinkingwater. These recorders make it possible for the district to have 24-hour monitoring and data-collectingcapabilities over these two critical water resources.In addition to the above mentioned programs, the Emerald Underground Water Conservation District, incooperation with seven other <strong>groundwater</strong> districts, encompassing eight contiguous counties, has completedits second year of rainfall enhancement through cloud seeding. In 1996 eight West <strong>Texas</strong> <strong>groundwater</strong>districts formed the West <strong>Texas</strong> Weather Modification Association in an effort to enhance rainfall overapproximately 7.2 million acres of West <strong>Texas</strong>. Through the continuation of this project, the district hopes toenhance aquifer recharge as well as provide increased crop and forage production.67

Glasscock County Underground Water Conservation DistrictThe Glasscock County Underground Water Conservation District, which covers all of Glasscock County andthe majority of the northern portion of Reagan County, has its office in Garden City. The district monitorschanges in both the quality of <strong>groundwater</strong> and <strong>groundwater</strong> levels within its boundaries. To monitor waterquality, the district has equipped a laboratory to analyze for the presence of coliform bacteria and monitor 14other water quality parameters. Analyses for herbicides and pesticides are also conducted.Two water quality monitoring programs have been initiated by the district. The first program is the domesticand irrigation water quality monitoring program which monitors the bacteriological and/or mineral content ofselected wells annually. In addition, most new wells are sampled and analyzed upon completion. The analysesdata are available upon request for any well having been tested within the district.The second program is the baseline <strong>groundwater</strong> quality monitoring program. As wells are inventoried withthe district, samples are collected and analyzed for pH, specific conductivity, total dissolved solids, andchlorides. This information is being used to establish baseline water quality throughout the district, which willaid in the identification of possible <strong>groundwater</strong> degradation due to oil and gas production within the district.An additional service provided through the district is grid mapping, in which the district provides the serviceof applying Topcon mapping instrumentation for the generation of site-specific maps. These maps are usedby the farmers in the district in laying off their rows to get the most efficient and effective use of their water.Hickory Underground Water Conservation District No. 1The Hickory Underground Water Conservation District No. 1, headquartered in Brady, covers parts ofConcho, Kimble, McCulloch, Mason, Menard, and San Saba counties. The district works closely with variouswater users (domestic, irrigation, municipal, and industrial) to monitor <strong>groundwater</strong> quality and <strong>groundwater</strong>levels of the Hickory aquifer. The district maintains and operates a laboratory for the analyses of waterqualitysamples. Groundwater samples are analyzed for total coliform, E coli, and 11 other parameters. Thelaboratory also analyzes water samples for the presence/absence of various pesticides.Approximately 200 wells are measured annually to determine changes of the <strong>groundwater</strong> level within thedistrict. During the past year, several wells were evaluated for pump efficiency and effective water use. Thedistrict also has an ongoing study to inventory all wells within the district, as well as stream flow gain/lossstudies across numerous faults on many area streams and rivers. In addition, the district is working todetermine the total amount of water available within the Hickory aquifer and develop a water budget for theaquifer.68

High Plains Underground Water Conservation District No. 1The High Plains Underground Water Conservation District Number One, headquartered in Lubbock, servesall or portions of Armstrong, Bailey, Castro, Cochran, Crosby, Deaf Smith, Floyd, Hale, Hockley, Lamb,Lubbock, Lynn, Parmer, Potter, and Randall Counties. The district monitors changes in water levels andwater quality within the 10,728 square-mile service area of the district. Within this area, there are currently1,196 water-level observation wells that also serve as the primary source of water-quality monitoring wells.These wells are documented as to location, equipment, ownership, etc. and are part of the cooperativenetwork of wells shared with the <strong>Texas</strong> Water Development Board (TWDB).Most of the analyses required for the district are obtained by contracts with local commercial laboratories oragreements with governmental or public entities. For reconnaissance surveys or informal investigations, thedistrict maintains portable field test kits and instruments capable of determining temperature, pH,conductivity, and approximate values for several common constituents. These test kits or instruments areuseful in determining the need for further analyses by a laboratory. District instruments for determiningtemperature, pH, and conductivity are utilized in verification of aquifer stabilization prior to samplecollection for laboratory analyses. These procedures for water sampling as well as others followed orrecommended by state or federal regulatory or recognized data-collection entities are adhered to, as closely asappropriate, to conduct the district’s water-quality monitoring program.The district pursues several programs to address water quality. These programs overlap in varying degreesand include a baseline water-quality sampling program, domestic well water-quality sampling program, and aprogram for addressing special water-quality problems as <strong>report</strong>ed to the District or as recognized by work ofthe district. Examples of this last category include: saltwater contamination primarily related to petroleumproduction, contamination resulting from industrial activities, concentrated animal feeding operations,landfills, agricultural sources, domestic or municipal sewage disposal, and any other similar activities orsources of substances that are capable of altering the native <strong>groundwater</strong> quality.The baseline water-quality program is a continuing effort to monitor changes and possible evolution of thenative quality of the aquifer through time. The district’s efforts toward this goal has involved sampling wellsand securing analyses for several parameters and constituents. This process allows for a baseline of data towhich analyses of future samples from these same wells or from the same aquifer area can be compared.Because of the expense involved in such a program, the district has followed various paths to establish andmaintain this program. District personnel have historically cooperated with the TWDB in several of theirsampling programs within the district’s area to expedite the sampling and receive analysis results ascompensation for this assistance. Most of the sample wells are selected from the previously-mentionedcooperative network of wells in the state observation-well program within the district. An attempt is made toresample wells on a rotational schedule to document potential changes in measured parameters or constituentsthat should provide an alert to <strong>groundwater</strong> contamination. District personnel have also cooperated withuniversities, other governmental agencies, and others on projects that have yielded analysis results that havebeen added to the district’s data files. The district has not added to this program by sampling or resamplingspecific wells for 1997.The district’s domestic well water-quality program is a continuous process with peaks and valleys of activity.Upon request of well users who suspect contamination of their domestic wells or who would like assurance ofacceptable quality for their domestic supplies, district personnel collect samples and use our laboratoryequipment to determine the presence or absence of fecal coliform. This test is a good indicator of the general69

iological quality of a water supply. The well user is informed by mail of the results of the tests and in thecase of a positive result indicating fecal coliform presence, an immediate response by telephone is districtpolicy. District personnel recommend cessation of use of the water for drinking, food preparation, or for anyother human-health related use when the presence of fecal coliform is indicated. Recommendations as todisinfection procedures and measures to prevent the recurrence of contamination in these wells is offered aspart of this free service.During 1997, sixty-six requests for fecal coliform testing of domestic wells received response by the district.Seven wells tested positive for fecal coliform on the first tests and all seven wells tested negative on retestsafter the well user responded to recommended disinfection procedures.An additional program of the High Plains District relating to water quality involves response to water-qualityalteration or contamination related to petroleum-production activities. Saltwater contamination of<strong>groundwater</strong> is the usual complaint of these problems which triggers a district response that is usually a fieldinvestigation with interviews of the interested parties and file searches, etc. to gather as much informationabout the problem as possible. After these initial information-gathering procedures are completed, theRailroad <strong>Commission</strong> of <strong>Texas</strong> (RCT) is contacted to <strong>report</strong> the nature of the problem and to supply ourresults of investigation to them. These problems and complaints are passed to the RCT because of theirprimary responsibility for activities relating to oil and gas production. After their investigation and relatedactivities, the RCT generally provides to the district a written <strong>report</strong> of their findings, progress, or resolutionof the problem.Actions relating to <strong>report</strong>s of contamination or district-observed problems, not related to oil and gasactivities, are handled in a similar manner to those described above. Most of these types of contaminationincidences with which the district is involved are within the responsibility of the <strong>Texas</strong> Natural ResourceConservation <strong>Commission</strong> (TNRCC). With these problems, the district generally makes an investigation, ifappropriate, and <strong>report</strong>s the nature of the problem to the TNRCC. The district continues to monitor theprogress of remediation of these problems until a resolution is reached.Extensive water-quality investigations are sometimes initiated by the district in response to specific problemsthat are perceived as needing investigation. During 1997, at the request of <strong>Texas</strong> Tech University, severaluniversity-owned wells on campus and some private wells adjacent to the campus were sampled for analysesby a university laboratory on campus. Twenty samples were collected and water levels in several of thesewells were measured to determine static <strong>groundwater</strong> levels. This information was utilized to determine thequantities of water available for utilization. These data were presented to University officials for theirconsideration. The use and evaluation of these data continue as of this <strong>report</strong>.These brief descriptions have been presented to provide an overview of the High Plains District’s waterqualitymonitoring programs and activities. Not all details of these activities could be included in this <strong>report</strong>.It may be observed by other agencies with similar responsibilities that restraints such as budgets andmanpower always allow less to be accomplished than can be observed as needing attention.70

Hill Country Underground Water Conservation DistrictProgram Description. The Hill Country Underground Water Conservation District encompasses GillespieCounty, and is headquartered in Fredericksburg. Water quality analyses of bacterial and mineral constituentsare regularly performed at its in-house laboratory. The district has been conducting water quality evaluationssince 1990, and has performed thousands of bacterial and chemical tests on several hundred wells during thistime.The district samples 74 wells annually in its <strong>groundwater</strong> quality monitoring program. Water quality analysesperformed by the district include pH, conductivity, hardness, alkalinity, sulfate, chloride, nitrate, fluoride,iron, and total dissolved solids. In addition to the annually sampled wells, the district encourages all residentsto have their wells tested. These test are performed at no cost to the resident, and have accounted for theanalysis of several hundred wells. In addition, the district monitors water levels in the 74 wells biannually.The district closely monitors water levels in and around the City of Fredricksburg's Ellenburger well fieldthroughout the year.The district has developed a comprehensive database for all aquifers within Gillespie County. The databaseallows easy access of <strong>groundwater</strong> yields, availability, and water quantity, and allows for easy retrieval andmapping of water quality parameters for each aquifer within the district. The district is currently modeling theEllenburger aquifer utilizing the computer program Visual Modflow. The district has sponsored graduatestudents to conduct regional geohydrologic studies of the Hensell and Hickory aquifers.Status of Ground-Water Monitoring Programs. During 1997, the district performed 162 analyses forchloride, 181 analyses for nitrate, and 215 analyses for total coliform and E. coli bacteria. 14 analyses forchloride exceeded 300 milligrams per liter (mg/l), 15 analyses for nitrate exceeded 10 mg/l (as nitrogen), 97analyses for total coliform were positive, and 21 analyses for E. coli bacteria were positive.Irion County Water Conservation DistrictThe Irion County Water Conservation District encompasses all of Irion County and is officed in Mertzon.The district has monitoring programs for water wells, springs, and surface water to survey for water-qualitydegradation from a variety of possible sources. Every identified water well within the district has beensampled and analyzed to establish a baseline for <strong>groundwater</strong> quality. The wells are resampled on a regularbasis and are analyzed in the district’s laboratory. A number of wells are tested on either a quarter,semiannual, or annual basis for the determination of <strong>groundwater</strong> quality. In addition Spring Creek, DoveCreek, Rocky Creek and the Middle Concho River are sampled on a semiannual basis and analyzed for bothgeneral water quality and coliform bacteria by a state-certified laboratory. These programs provide for theearly detection of potential <strong>groundwater</strong> contamination, and allow for immediate remediation prior tocontamination of <strong>groundwater</strong> supplies. Groundwater levels are monitored throughout the district. Measuredwells include wells designated by the <strong>Texas</strong> Water Development Board and other wells in the program.The District has participated in a cooperative agreement between other local area <strong>groundwater</strong> districts since1988 to provide for regional coordination of activities and maximum benefit from tax dollars. This agreementhas been updated creating the West <strong>Texas</strong> Regional Groundwater Alliance that includes nine local<strong>groundwater</strong> districts.71

Another interlocal agreement with six other <strong>groundwater</strong> districts formed the West <strong>Texas</strong> WeatherModification Association in March 1996. This Association was created to conduct a rainfall enhancementprogram through weather modification (cloud seeding) for the area including: Crockett, Glasscock, Irion,Reagan, Schleicher, Sterling, Sutton, Upton, and part of Tom Green counties. Others participating with theAssociation are the University of <strong>Texas</strong> System, Upton County residents, and the City of San Angelo. Thisprogram helps provide for enhanced recharge of the aquifer, increased runoff, and economic benefits for theregion.Lipan-Kickapoo Water Conservation DistrictProgram Description. The Lipan-Kickapoo Water Conservation District, which covers parts of Tom Greenand Concho counties, has its office in Vancourt. The district monitors changes in both the quality andquantity of water within its boundaries. To monitor the water quality, the district has equipped a smalllaboratory to check water samples for the presence of coliform bacteria and monitor 12 other water qualityparameters. A water-sampling trailer has been equipped with a generator and pump to purge wells to obtainrepresentative water samples for analysis in the laboratory. Water quantity is monitored by measuring waterlevels in 60 wells scattered throughout the district. Water levels in these wells are measured each year inMarch and October.Two water quality monitoring programs continue to be conducted by the district. The first program, thedomestic well quality monitoring program, monitors the bacteriological and mineral content of selected wellsonce a year. In addition, all new domestic wells are sampled and analyzed upon completion. Upon request, awater analysis is performed on water from any well within the district.The second program is the baseline water quality monitoring program. As wells are inventoried within thedistrict, samples are taken and analyzed for pH, specific conductivity, total dissolved solids, and chlorides.This information is being used to establish baseline water quality throughout the district, which will aid inpinpointing possible contamination due to oil and gas production within the district.A third water quality and well inventory program was initiated in March 1996 with funding coming from theUpper Colorado River Authority through the Clean Rivers Program. This water quality program consists ofsampling and inventorying all water wells within a two-mile strip along the Concho River between SanAngelo and Paint Rock, <strong>Texas</strong>. The samples are obtained using procedures and techniques recommended bythe <strong>Texas</strong> Water Development Board. These samples are then taken to a commercial laboratory approved bythe TNRCC and the EPA.The district also works in conjunction with the TNRCC in establishing Wellhead Protection Programs forsmall towns located within the district. A Wellhead Protection Program has been established for the town ofEola in Concho County. Eola’s only source of drinking water is from a well located north of town. Waterfrom this well contains naturally occurring nitrates in excess of state drinking water standards. This WHParea was established to protect the water quality from future degradation by any surface contamination.Status of Groundwater Contamination. The water quality continues to deteriorate in some areas of thedistrict due to contamination resulting from oil and gas production. The primary cause of this contaminationare salt water intrusion from saline aquifers through old unplugged or improperly plugged oil and gas wellsand an increase in the salinity of the <strong>groundwater</strong> due to old open unlined brine disposal pits.72

An artesian brine aquifer called the “Coleman Junction” is infiltrating other fresh water zones throughimproperly plugged abandoned oil and gas wells and through old abandoned deep water wells that have notbeen plugged. The Coleman Junction is approximately 1,500 to 2,500 feet below the surface. Another aquifercalled the “San Angelo” Formation contains levels of chlorides exceeding 5,000 mg/l. It is usuallyencountered from 60 to 300 feet below the surface in some areas of the district. This poses a problem whendrilling water wells since the possibility exists that this formation will be encountered.Some contamination of the fresh water is still occurring from old unlined brine disposal pits. These pitlocations pre-date the 1969 ban on their use in <strong>Texas</strong>. Due to the percolation of the saline water through thesurface soil and sub soil, the shallow fresh water aquifers are becoming more saline in the areas around thepits. Monitoring of the water quality is continuing in these areas.Live Oak Underground Water Conservation DistrictThe Live Oak Underground Water Conservation District encompasses Live Oak County. The district’sheadquarters is located between George West and Three Rivers. Water quality analyses for mineralconstituents are regularly performed at its in-house laboratory. The district has conducted water qualityevaluations since 1992 and has performed hundreds of chemical tests on numerous wells since that time.The district samples 20 wells annually in its <strong>groundwater</strong> quality monitoring program. Water quality analysesperformed by the district include pH, conductivity, hardness, alkalinity, sulfate, chloride, nitrate, iron, andtotal dissolved solids. The district encourages all residents to have their wells tested at no cost. This servicehas accounted for analyses of numerous wells. The district is in the process of developing a water qualitydatabase for all aquifers in Live Oak County.73

Mesa Underground Water Conservation DistrictThe Mesa Underground Water Conservation District (UWCD) encompasses Dawson County and has itsoffice in Lamesa. The district works closely with local, state, and federal agencies in the protection andconservation of the Ogallala aquifer.The district operates an in-house water analysis laboratory and a portable field laboratory, equipped withfield-testing and water-sampling equipment. The <strong>groundwater</strong> quality monitoring program analyzes 55 sitesin the fall of each year. This enables the district to determine a <strong>groundwater</strong> quality baseline and look forfluctuations of water quality yearly. The district also performs water-quality analysis upon request fromDawson County residents. The district’s annual <strong>groundwater</strong> level monitoring program measures 115 wellseach January. This data goes into a statewide <strong>groundwater</strong> level database maintained by the <strong>Texas</strong> WaterDevelopment Board. The district also has four manual flow meters and one electronic flow meter.Mesa UWCD established the Used Oil Collection (UOC) program for the constituents of Dawson County inJanuary 1994. The program (funded through a grant from the TNRCC) was initiated as a pilot project with atwo-fold objective. It serves the district with on-site collection capabilities and the Do-It-Yourself (DIY)drop-off collection. In December 1994, Mesa UWCD established the Used Oil Filter (UOF) Collectionprogram in conjunction with the UOC program. The district collects and crushes used oil filters with the aidof a filter cutter/crusher, purchased with grant money received from the TNRCC.The goal of these programs is to protect the quality of <strong>groundwater</strong> in the Ogallala aquifer. Each resident ofthe district is encouraged to properly dispose of waste oil and used oil filters through these successfulrecycling programs.Permian Basin Underground Water Conservation DistrictThe Permian Basin Underground Water Conservation District, headquartered in Stanton, includes all ofMartin and northwest Howard counties. The district has installed an in-house screening laboratory to performits water-quality monitoring functions. The district performs analyses for nitrates, sulfates, chlorides,calcium, magnesium, pH, and specific conductivity, and makes a rough estimate of total dissolved solids.Coliform bacteria samples are also collected and taken to a state certified laboratory for analysis. Periodically,samples are taken to state certified laboratories to ensure the accuracy of the district's screening laboratory.These samples are also analyzed for arsenic, fluoride, lead, and other constituents which are beyond thedistrict's laboratory abilities.The district's goals are threefol: (1) the district is establishing a baseline <strong>groundwater</strong> quality database; (2)the district analyzes sampling data in the effort to locate <strong>groundwater</strong> contamination, identify the sources ofcontamination, and proceed with actions to bring the contamination to a halt, and; (3) the district strives toprotect the health and welfare of rural residents relying on well water for their drinking water supply.74

Plateau Underground Water Conservation and Supply DistrictThe Plateau Underground Water Conservation and Supply District covers Schleicher County with thedistrict’s office located in Eldorado. The district has had considerable oil and gas activity in past years andnow confronts <strong>groundwater</strong> quality problems stemming from this industry. District staff work closely withlandowners and the Railroad <strong>Commission</strong> of <strong>Texas</strong> to locate and plug abandoned oil wells.The district has an in-house laboratory for the purpose of determining a water-quality baseline for the districtand detecting contamination areas. Wells in the district are located, registered, and sampled. Samples aretested for chlorides, nitrates, iron, sulfates, total dissolved solids, pH, alkalinity, and hardness. Domesticwells are also tested for coliform and E. coli bacteria. Sulfate-reducing bacteria, slime-forming bacteria, andiron-related bacteria tests are also performed as needed.Santa Rita Underground Water Conservation DistrictThe Santa Rita Underground Water Conservation District, which covers most of Reagan County, has itsoffice in Big Lake. The district monitors changes in both the quality of <strong>groundwater</strong> and the water levelswithin its boundaries. To monitor water quality, the district has equipped a small laboratory to analyze for thepresence of fecal coliform and monitor 12 other water quality parameters. The water level monitoringprogram currently measures 37 wells annually.Two water quality monitoring programs have been initiated by the district. The first program is the domesticwell-water monitoring program which monitors the bacteriological and mineral content of selected wellsannually. In addition, all new wells are sampled and analyzed upon completion. The analyses data from anywell tested within the district are available upon request.The second program is the baseline <strong>groundwater</strong> quality monitoring program. As wells are inventoried,samples are collected and analyzed for pH, specific conductivity, total dissolved solids, and chlorides. Thisinformation is being used to establish baseline water quality throughout the district, which will aid in theidentification of possible <strong>groundwater</strong> degradation due to oil and gas production within the district.The Santa Rita district is also assisting the Railroad <strong>Commission</strong> of <strong>Texas</strong> (RCT) concerning oilfield relatedpollution or potential pollution of <strong>groundwater</strong> within the district. Three sites are currently being investigatedby the RCT and the district. These sites include oil polluted water near a plugged oil well location (Well No.44-38-508), a propane producing water well (Well No. 44-18-903) near “plugged” propane storage wells,and a shallow (8 - 30 feet) <strong>groundwater</strong> zone contaminated with oil from a large storage facility (KemperStation). These three sites are listed under Reagan County in Table 2 (RCT table); two sites are under theSanta Rita district’s name and the third site is under Exxon Pipeline Company.The district is in the second year of its abandoned water well plugging program. The district is pluggingcertain unused, improperly completed, or dry water wells at no cost to the well owner. In 1996-1997 theDistrict plugged 22 such wells, of which 12 were on University of <strong>Texas</strong> property. The U.T. Lands systemfurnished plugging materials and the district furnished labor. The district plans to continue the program andmay expand it each year.75

South Plains Underground Water Conservation DistrictThe South Plains Underground Water Conservation District serves all of Terry County and part of HockleyCounty. The district maintains a water-quality laboratory at its office in Brownfield.The district began sampling water wells for water quality in December of 1993. Samples were collected from103 domestic wells and analyzed for: pH, specific conductivity, total dissolved solids, alkalinity, hardness,chloride, fluoride, iron, nitrate as nitrogen, and sulfate. The same water wells will be sampled on an annualbasis in order to analyze trends in the change of <strong>groundwater</strong> quality over time, and to aid the staff in theearly identification of areas of <strong>groundwater</strong> degradation. An annual water-quality <strong>report</strong> will be prepared anddistributed to the general public and appropriate agency officials.The district offers free water-quality testing for residents within the district throughout the year at theresidents' request. Constituents analyzed include coliform bacteria as well as those previously listed. Thedistrict has money budgeted for outside laboratory testing should the need arise to confirm test results or testfor parameters which the district is not capable of analyzing. Future plans include annual testing forpesticides on a presence/absence basis.The district began the sampling of irrigation wells for water quality analysis during the summer of 1994.Approximately 45 wells were sampled that had been pumped for extended periods of time (±7 days) in orderto form a more accurate water-quality "picture" of the Ogallala aquifer underlying the district.Sutton County Underground Water Conservation DistrictThe Sutton County Underground Water Conservation District encompasses all of Sutton County, and has itsoffice in Sonora. The district monitors changes in both the <strong>groundwater</strong> quality and water levels through twomonitoring programs.The first program has over 60 monitor wells that were selected and inventoried as part of a baseline waterqualitymonitoring program. Each year, approximately 20 of these monitor wells are sampled. Over a threeyearperiod, all 60 wells are sampled and analyzed by an EPA-approved laboratory for over 30 water qualityparameters. These parameters include, but are not limited to 13 dissolved solids, total organic carbon, phenol,total phosphorus, total organic halides, and total recoverable petroleum hydrocarbons. This process willcontinue to be repeated so that each of the 60 monitor wells will be tested every three years.The second program involves the use of an in-house laboratory that is equipped to analyze for pH, specificconductivity, total dissolved solids, chlorides, nitrates, sulfates, temperature, lead, total coliform, and fecalcoliform. All domestic wells within the district are being sampled and analyzed to help locate any possibleareas of <strong>groundwater</strong> degradation. To date, over 225 domestic water wells have been sampled for quality.The district has a Wellhead Protection Area, as well as a Drought Contingency Program administered by theCity of Sonora. The district has implemented a water level/rainfall correlation on seven wells surroundingSonora. In 1997, the district will analyze water quality to determine changes occurring due to recharge in thisarea.The district is also involved in a weather modification project (cloud seeding project with approximately eightother counties in the area). This project involves a system of some 35 - 40 rain gauges within the county. This76

effort will allow the district to correlate the effect of enhanced rainfall on recharge, water levels, and waterquality.The district is in the process of loading computerized data on ArcView software to provide visual maps of itsprograms and projects. The district plans to perform spatial and water modeling projects in the future.77

<strong>Texas</strong> Agricultural Experiment StationProgram Description. The <strong>Texas</strong> Agricultural Experiment Station (TAES) is the official agriculturalresearch agency in <strong>Texas</strong>. Headquartered at <strong>Texas</strong> A&M University, TAES promotes food and fiberproduction that emphasizes water conservation and the protection of natural resources. TAES operates asystem of 14 research centers which are located in the major land and natural resource regions of <strong>Texas</strong>. The<strong>Texas</strong> Water Resources Institute is an administrative unit of TAES that guides internal water-relatedresearch. In 1996, the Environment and Natural Resources Program was launched to better respond to needsfor environmental protection and education.Broad goals of the TAES <strong>groundwater</strong> research program are to protect, preserve, and efficiently use waterresources, and to develop sustainable agricultural production systems. Groundwater programs of TAES stressthe development of management strategies, technologies, and educational programs to support sustainableagriculture.TAES <strong>groundwater</strong> quality research focuses on reductions in chemical use; the control, fate, and transport ofagricultural chemicals; and the remediation of contaminated <strong>groundwater</strong>s.Major efforts are underway to develop strategies to manage brush species on rangelands to increase wateryields and protect water quality; to manage livestock wastes from concentrated animal feeding operations toprevent water contamination; and to develop crop production technologies that produce high yields whileminimizing the loss of pesticides, chemicals and nutrients into ground and surface-waters.The following are examples of recent TAES <strong>groundwater</strong> related research activities:The fate and transport of atrazine in and through soils are under study in the Brazos Riverfloodplain. These soils are intensively farmed and may provide pathways for chemical transport tosurface water;The ECONO-RICE program has led to the development of new rice varieties and improvedmanagement strategies that have lowered water use by 25 percent, while increasing yields by 44percent;TAES is also developing rice water management strategies that lower pesticide needs and increaserecycling and water conservation;TAES researchers are utilizing genetic engineering to identify genes in bacteria and fungi that havethe potential to degrade <strong>groundwater</strong> contaminants;TAES scientists pioneered the development of highly efficient Low Energy Precision Application(LEPA) irrigation systems. These systems use drop tubes and apply water and chemicals at lowpressure near the plant canopy, reducing the risk of runoff pollution and drainage below the rootzone. Certain insects are controlled with as little as one-tenth of label rates of chemicals whenapplied by LEPA sprays directed at the under sides of crop leaves;Animal waste management strategies developed by TAES reduced dairy water use by 50 percent andsignificantly lowered wastewater production. Other TAES efforts focused on efforts to betterestimate the amount of cattle waste that can be safely applied, methods to apply dairy wastewater,78

and methods to better evaluate where dairies can be safely located. Research activities are nowdirected toward development of technologies to reduce phosphorous loading to soils and surfacewaters;TAES scientists are utilizing computer simulation models to assess the impact of agriculturalpractices on the environment. For example, such models are now being used to identify cropping andchemical management strategies that may be appropriate for environmentally sensitive areas like theSeymour aquifer and the <strong>Texas</strong> Coastal Bend;TAES also trains future professionals through undergraduate and graduate education and researchprograms at <strong>Texas</strong> A&M University and other System institutions. Many TAES researchers at<strong>Texas</strong> A&M University in College Station also hold teaching appointments, thus providing the latestresearch results to students, and;TAES research efforts are complemented by the programs of the <strong>Texas</strong> Agricultural ExtensionService (TAEX). For example, TAEX specialists produce easy-to-read fact sheets and otherpublications for specific clientele, including agricultural producers. Other TAEX activities includefield demonstrations and educational programs for youth and adults.Other TAEX efforts include the development of county level pesticide use estimates, and participation in U.S.Department of Agriculture Hydrologic Unit Programs, which implement solutions to water quality problemsin specific watersheds.Status of Groundwater Monitoring Programs. In addition to the numerous water-related research projectspreviously listed, the TAEX operates soil and water testing laboratories in College Station. These facilitiesprovide information on potential <strong>groundwater</strong> quality problems to thousands of rural Texans. Last year, morethan 40,000 soil tests and 2,000 water analyses were conducted. Results from the water tests are available ina database format so that water-quality trends can be identified.Status of Groundwater Contamination. The <strong>Texas</strong> Agricultural Experiment Station has no regulatoryauthority. No contamination cases were <strong>report</strong>ed by the <strong>Texas</strong> Agricultural Experiment Station during 1997.79

Bureau of Economic GeologyProgram Description. The Bureau of Economic Geology, established in 1909, is a research entity of theUniversity of <strong>Texas</strong> at Austin and functions as the State Geological Survey. The Bureau conducts basic andapplied research projects, including environmental site assessment and investigations of <strong>groundwater</strong>resources and <strong>groundwater</strong> quality, in support of other state agency missions.The Bureau's hydrogeologic and environmental efforts during 1997 emphasized geologic study of issuesrelated to subsurface waste containment and remediation of near-surface contaminants. The Bureau continuedto assist the Railroad <strong>Commission</strong> of <strong>Texas</strong> in devising cleanup solutions at abandoned oil field sites in<strong>Texas</strong> where the source and subsurface extent of contamination were unknown and where complexsubsurface geology will affect remediation efforts. Investigations focused on finding cost-effective remedialsolutions and limiting investigative costs by applying nonintrusive and advanced techniques. In a pilot studyfor the <strong>Texas</strong> Natural Resources Conservation <strong>Commission</strong>, Bureau researchers developed a methodology forbuilding a geographic information system (GIS) to merge data on leaking petroleum storage tank sites andhydrogeologic data to facilitate retrieval and analysis. The study evaluates this technology as a way toenhance evaluation and risk assessment of new sites, as well as to evaluate the effectiveness ofsite-characterization, risk-assessment, and remediation of old sites. The Bureau is also investigating theperformance of engineered barriers capping waste disposal facilities. A prototype trench cap sponsored by the<strong>Texas</strong> Low-Level Radioactive Waste Disposal Authority was built using design specifications for a facility'sproposed trench caps and was monitored with a wide variety of instruments to determine how much waterinfiltrates through the trench cap into the subsurface in the arid West <strong>Texas</strong> setting.Status of Groundwater Monitoring Programs. Bureau staff measure <strong>groundwater</strong> quality and water levelsin selected public and private wells and specially constructed test holes within the scope of projects such asthose previously described. These projects cover many different parts of <strong>Texas</strong>. Most water-quality datacollected in these studies consist of pH, temperature, conductivity, major and minor inorganic ions, totalorganic carbon, isotopes, and other constituents of interest. Data are used to interpret rates and modes ofhydrologic processes and delineate the extent of possible contamination. Project-specific data are collated indata <strong>report</strong>s or topical <strong>report</strong>s; periodically the digitized data are compiled for inclusion in the TNRIS datasystem.Status of Groundwater Contamination. The Bureau of Economic Geology is not a regulatory agency andhas no <strong>groundwater</strong> protection regulatory programs. Consequently, the Bureau does not have regulatoryjurisdiction over contamination cases detected in the course of its hydrogeologic investigations. Any detectionof contamination is referred to the proper regulating or sponsoring agency .80

<strong>Texas</strong> Department of Licensing and RegulationWater Well Drillers/Pump Installers Program Description. The need for identification and protection ofthe state’s <strong>groundwater</strong> resources was recognized by the Legislature through the creation of the Water WellDriller’s Board in 1965. The Board had the responsibilities of determining qualifications for licensure of allpersons drilling water wells and enforcing standards of conduct and well completion through the revocation orsuspension of licenses and assessment of administrative penalties. Legislation adopted by the 69thLegislature required that the drillers of Class V injection wells be licensed by the Board after September 1,1985. Also, the 70th Legislature required that the drillers of monitor and dewatering wells be licensed by theBoard after January 1, 1988, and it strengthened the state’s authority to require the plugging of abandonedand deteriorated wells. In 1991, the 72nd Legislature expanded the Board’s functions to include licensing andregulation of pump installers.As mandated by Senate Bill 2 of the 72nd Legislature in 1991, the <strong>Texas</strong> Water Well Drillers Board wasabolished and the responsibilities and functions of the Board and all appropriations to the Board weretransferred to the <strong>Texas</strong> Water <strong>Commission</strong> on September 1, 1992, and subsequently to the <strong>Texas</strong> NaturalResource Conservation <strong>Commission</strong> (TNRCC) on September 1, 1993. Senate Bill 1955 (75th Legislature,1997) transferred the Water Well Drillers/Pump Installers Program from the TNRCC’s Compliance SupportDivision to the <strong>Texas</strong> Department of Licensing and Regulation (TDLR) effective September 1, 1997.The Water Well Drillers/Pump Installers Program maintains communications with the Water Well DrillersAdvisory Council and investigates all alleged violations of Chapters 32 and 33 of the <strong>Texas</strong> Water Code andof 30 <strong>Texas</strong> Administrative Code, Chapter 238 (Water Well Driller Rules). The program also investigatesconsumer complaints filed against water well drillers, pump installers, and inspects water wells to ascertaincompliance with well construction standards.Investigations include, but are not limited to, surface completions, depth of annular cement, and regulateddistances from contamination sources. Surface completions and depth of annular cement footage of wells areclosely inspected to prevent contamination of <strong>groundwater</strong> from surface runoff. In addition, rules requiringisolation of zones containing undesirable or poor quality water are enforced to prevent commingling withfresh water.Violations of Chapters 32 and 33 of the <strong>Texas</strong> Water Code or the Water Well Driller rules are enforced bythe TDLR (with recommendations from the advisory council) through TDLR orders requiring administrativepenalties and corrective actions or referral to the Attorney General’s office. Investigations which involve<strong>groundwater</strong> contamination are referred to the appropriate state agency with jurisdiction for the activitybelieved to be the cause of the contamination.Status of Groundwater Monitoring Programs. The Water Well Drillers/Pump Installers Program does notconduct or require <strong>groundwater</strong> monitoring. At the end of August 1997, there were 2,400 licensedprofessionals including drillers, pump installers, driller trainees or pump installer apprentices regulated by theWater Well Drillers/Pump Installers Program.During Fiscal Year 1997, approximately 150 investigations were conducted by the Water Well Drillers/PumpInstallers Program with all violations either remediated or in the enforcement process. Seventy fiveabandoned wells were <strong>report</strong>ed and all are in various stages of notification, investigation or completion. Theprogram collected six water well (<strong>groundwater</strong>) samples in Fiscal Year 1997.81

GROUNDWATER CONTAMINATIONCASE DESCRIPTIONSTable 1. <strong>Texas</strong> Natural Resource Conservation<strong>Commission</strong>Table 2. Railroad <strong>Commission</strong> of <strong>Texas</strong>Table 3. <strong>Texas</strong> Alliance of Groundwater Districts83

Table 1<strong>Texas</strong> Natural ResourceConservation <strong>Commission</strong>Groundwater Contamination CaseDescription TableTNRCC-A

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONEXPLANATION OF FIELDS----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------COUNTY:DIVISION:NEW CASES:FILE NAME:FILE NUMBER:LOCATION:CONTAMINATIONDESCRIPTION:DATE:ENFORCEMENTSTATUS:DATA QUALITY:THE COUNTY NAME IS THE FIRST ENTRY IN THE LEFT PORTION OF THE TABLE. IT IS LISTED ONLY ONCE FOR EACH GROUP OF CASES IN THAT COUNTY.DIVISIONS ARE LISTED ONLY ONCE WITH THEIR RESPECTIVE CASES FOR EACH COUNTY.ENF/WST - ENFORCEMENT DIVISION/WASTE SECTION ENF/WTR ENFORCEMENT DIVISION/WATER SECTIONFOD - FIELD OPERATIONS DIVISION IHW - INDUSTRIAL AND HAZARDOUS WASTE DIVISIONMSW - MUNICIPAL SOLID WASTE DIVISION PCD/CA - POLLUTION CLEANUP DIVISION/CORRECTIVE ACTIONPCD/ENF - POLLUTION CLEANUP DIVISION/ENFORCEMENT PCD/SUP - POLLUTION CLEANUP DIVISION/SUPERFUNDPCD/VC - POLLUTION CLEANUP DIVISION/VOLUNTARY CLEANUP PST - PETROLEUM STORAGE TANK DIVISIONWPA - WATER PLANNING AND ASSESSMENT DIVISION WUD - WATER UTILITIES DIVISIONAN ASTERISK IS PLACED IN EACH RECORD THAT IS REPORTED AS NEW FOR THIS YEAR.FILE NAMES REFLECT RESPONSIBLE PARTIES OR GEOGRAPHIC LOCATIONFILE NUMBERS ARE ASSIGNED ACCORDING TO THE RESPECTIVE DIVISION NUMBERING SYSTEM. FILE NUMBER IS USED TO LOCATE FILE IN TNRCC RECORDS.LOCATIONS ARE GIVEN AS ADDRESSES OR GEOGRAPHIC LOCATION DESCRIPTIONS.As - ARSENIC, Cr - CHROMIUM, Pb - LEAD, NO3 - NITRATE, SO4 - SULFATE, VOC - VOLATILE ORGANIC COMPOUNDS, ORG. - ORGANIC CHEMICALS,TOC - TOTAL ORGANIC COMPOUNDS, TDS - TOTAL DISSOLVED SOLIDS, TCE - TRICHLOROETHENE, MEK - METHYL ETHYL KEYTONE,CARBON TET - CARBON TETRACHLORIDE, PCP - POLYCHLORINATED PHENYLS, PCB - POLYCHLORINATED BIPHENYLS, TPH - TOTAL PETROLEUM HYDROCARBONS,BTEX - BENZENE-TOLUENE-ETHYLBENZENE-XYLENE, MTBE - METHYL-TERTIARY-BUTYL-ETHER. THE MAJORITY OF CASES INVOLVE PETROLEUM CONTAMINATION.DATE OF EARLIEST KNOWN CONTAMINATION CONFIRMATION.THE FIRST ENTRY IN THIS FIELD INDICATES THE LEVEL OF AGENCY RESPONSE, THE SECOND INDICATES THE SITE ACTIVITY STATUS. SOME CASES DO NOTHAVE COMPLETE ENFORCEMENT STATUS CODES BECAUSE OF INSUFFICIENT DATA. STATUS CODES MAY BE BORDER-LINE BETWEEN TWO LEVELS ON THE ENFORCEMENTSTATUS MATRIX AND ARE ENTERED AS A COMBINATION OF ENFORCEMENT STATUS CODES, I.E.: 3A,B OR 4,5. SEE PAGES 29-47 FOR A DESCRIPTION OF THESE CODES.E - EPA APPROVED ANALYTICAL PROCEDURES,Q - QUALITY CONTROL PROGRAM ESTABLISHED FOR SAMPLING PROCEDURES,V - VERIFICATION OF CONTAMINATION THROUGH PROCEDURES LISTED BELOW:1. SPLITTING SAMPLES WITH REGULATED ENTITY OR OTHER AGENCY FOR COMPARISON OF ANALYSIS RESULTS2. RESAMPLING FOR VERIFYING ANALYSIS RESULTS3. SUPERVISORY OR COMMITTEE REVIEW OF SAMPLING PROCEDURES AND ANALYSIS RESULTSSECTIONAN ENTRY IN THIS FIELD CONSTITUTES NOTIFICATION UNDER TEXAS WATER CODE SECTION 5.236 (HB 938 IN EARLIER REPORT) TO LOCAL OFFICIALS FOR5.236: CASES REPORTED UP TO DEC. 31, 1996 THAT WERE NOT INCLUDED IN THE REPORT THE PREVIOUS YEAR. A "Y" CODE IN THIS FIELD UNDER THE IHW DIVISIONMARKS A CASE WHICH HAS RESULTED IN POINT-OF-USE IMPACTS ON DOMESTIC, INDUSTRIAL, IRRIGATION, OR MUNICIPAL WELLS. A "Y" CODE OTHERWISEMARKS THOSE CASES IN WHICH CONTAMINATION MAY POTENTIALLY AFFECT A PUBLIC DRINKING WATER SUPPLY OR HAS RESULTED IN POINT-OF-USE IMPACTS.TNRCC - 1

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ANDERSONENF/WSTIHWPCD/CAPCD/ENFPSTANDREWSENF/WSTPSTANGELINAENF/WSTIHWPCD/CAPCD/SUPDOWELL SCHLUMBERGER - PALESTINE 33570 2201 WEST REAGAN ST., PALESTINEVOC'S,TPH,ETC. 11/15/88 3B , 1A EQV2MURRAY CORPORATION - LEGISLATIVE 33063 2002 TILE FACTORY ROAD, SW OF PALESTINE F-LISTED SOLVENTS 9/23/88 3B , 3 EQV23MURRAY CORPORATION 33063 2002 TILE FACTORY ROAD, SW OF PALESTINE F-LISTED SOLVENTS 9/23/88 3A,3B , 3,4,5 E,Q,V,2MURRAY CORPORATION 33063 2002 TILE FACTORY ROAD, SW OF PALESTINE F-LISTED SOLVENTS 9/23/88 3A,3B , 3, 4 E,Q,V,2FRED PERRY DBA GLASS CONTAINER CORP. 52116 HWY 79 WEST, PALESTINEPAINT, OIL, HYDROCHLORIC ACID 2A , 0BUSH & BAILEY INC 094958 1919 CROCKETT RD, PALESTINEGASOLINE 2/23/90 2 , 3 E,QCHEVRON PRODUCTS COMPANY 102214 816 W OAK, PALESTINEGASOLINE, WASTE OIL,KEROSENE11/21/91 2 , 2A E,QCOLE KIM 101546 1929 CROCKETT RD, PALESTINEGASOLINE 1/14/92 2 , 2A E,Q* D CHAPMAN112079 1318 W PALESTINE AVE, PALESTINEUNKNOWN 1/27/97 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099241 403 W PALESTINE, PALESTINEGASOLINE 4/15/90 2 , 2A E,QDOWELL SCHLUMBERGER INC 094037 2201 W REAGAN, PALESTINEUNKNOWN 11/8/89 2 , 5 E,Q* ESTATE H S DAVENPORT SR112287 116 CROCKETT RD, PALESTINEUNKNOWN 5/5/97 1B , 1A E,QFIRST NATIONAL BANK 108871 GRANBERRY, PALESTINEGASOLINE 7/29/94 2 , 6 E,Q* H S DAVENPORT SR ESTATE112221 122 CROCKETT RD, PALESTINEUNKNOWN 4/4/97 2 , 6 E,QHARDIN OIL CO 100894 W HWY 294, ELKHARTGASOLINE, DIESEL 11/15/91 1B , 1A E,QJ JS FAST STOPS, INC. 099633 1901 CROCKETT RD, PALESTINEGASOLINE, DIESEL 7/16/91 2 , 2A E,QDOWELL SCHLUMBERGER - ANDREWS 33585 HIGHWAY 385, ANDREWS, TXBTEX 4/25/89 3B , 2A ECOUNTY OF ANDREWS 099665 13TH, ANDREWSDIESEL 7/29/91 2 , 2A E,QDOWELL SCHLUMBERGER INC 092277 HWY 385, ANDREWSGASOLINE 11/9/88 2 , 2A E,QGORDON COX 099254 S HWY 385, ANDREWSGASOLINE 6/4/91 2A , 6 E,QJIM UNDERWOOD 101197 701 N MAIN, ANDREWSGASOLINE 12/11/91 1B , 1A E,QO D SCHOOLCRAFT 091586 301 W BROADWAY, ANDREWSGASOLINE 12/29/87 5B , 2A E,QPRIDE PETROLEUM SERVICES 098042 S HWY 385, ANDREWSGASOLINE, DIESEL 2/19/91 2 , 3 E,QSOUTHWEST ENERGY DIST INC 101842 606 E BROADWAY, ANDREWSGASOLINE 3/16/92 2 , 2A E,QWEST TEXAS GAS, INC. 094909 107 E 5TH ST, ANDREWSGASOLINE 9/25/89 2 , 2A E,QCENTURY FOREST (ANGELINA & NECHES RR) 32770 HWY 103 6 MILES EAST OF LUFKINBTEX/NAPTHALENE/TOLUENE 12/15/85 3B , 2B V3TEMPLE INLAND FIBERBOARD 30112 BOX FACTORY ROAD, DIBOLLCREOSOTE 5/22/86 3A,3B , 4,5 E,Q,V,2,3CENTURY FOREST 32770 HWY 103, LUFKINXYLENE 5/12/89 2 , 0 ETEMPLE INLAND FIBERBOARD 30112 BOX FACTORY ROAD, DIBOLLCREOSOTE 5/22/86 3A,3B , 2,5 E,Q,V,2,3HIGGINS WOOD PRESERVING STATESUPERFUND SITEBETWEEN N. TIMBERLAND DR., WARREN ST., ANDPAUL AVE., LUFKINCREOSOTE CONSTITUENTS,PENTACHLOROPHENOL3B , 2AE,Q,V,1,2,3TNRCC - 2

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ANGELINAPCD/SUPPCD/VCPSTARANSASPCD/SUPPCD/VCPSTOLD LUFKIN CREOSOTING STATE SUPERFUNDSITE1411 E. LUFKIN AVE., LUFKINCREOSOTE CONSTITUENTS* FORMER TEMPLE OIL COMPANY OF TEXAS 356 101 PERSIMMON STREET, LUFKINHYDROCARBONS 9/30/96 0 , 2 EADK INVESTMENTS, INC. 092747 4110 S 1ST ST, LUFKINDIESEL 3/3/89 2 , 2A E,QANGELA GREER IVY 095663 1411 ATKINSON DR, LUFKINGASOLINE 5/10/90 2 , 2A E,QCHAMPION INTERNATIONAL CORP 108634 E HWY 103, LUFKINGASOLINE 6/29/94 2 , 2A E,QDR. CHARLES KENT 101465 205 N TIMBERLAND DR, LUFKINGASOLINE, DIESEL, KEROSENE 12/20/91 2 , 2A E,QEXXON COMPANY USA 091383 2113 TIMBERLAND, LUFKINGASOLINE 6/2/87 2 , 2A E,QEXXON COMPANY USA 093773 2304 ATKINSON DR, LUFKINUNKNOWN 10/4/89 2 , 2A E,QFIFTH WHEEL OF TEXAS 107893 4000 N MEDFORD, LUFKINGASOLINE, DIESEL 2/5/94 2 , 2A E,Q* H E LACEY112688 923 W FRANK, LUFKINGASOLINE 6/24/97 1B , 1A E,Q* JASPER OIL CO112024 203 S TIMBERLAND, LUFKINGASOLINE 12/3/96 2 , 2A E,Q* JASPER OIL CO112025 101 CHAMPION DR, LUFKINGASOLINE 12/3/96 2 , 2A E,Q* LUFKIN ISD103570 1303 S 3RD, LUFKINGASOLINE 6/8/92 2A , 1A E,QMARTIN C M 103397 2140 S 1ST ST, LUFKINGASOLINE 6/4/92 2 , 2A E,QOKAY FOOD STORES 101464 103 N JOHN REDDIT DR, LUFKINGASOLINE 1/9/92 2A , 1A E,QPECO OIL CO 091259 2000 S 1ST, LUFKINGASOLINE 3/11/87 5B , 2A E,Q* POLK OIL CO INC094683 HWY 63, ZAVALLAGASOLINE 1/8/90 2 , 2A E,QTEMPLE OIL CO 094806 505 N TIMBERLAND, LUFKINGASOLINE 1/29/90 2 , 4 E,QTEXAS DEPT OF PUBLIC SAFETY 102879 100 CHRISTI ST, LUFKINGASOLINE 10/28/91 2 , 2A E,Q* TOTAL PETROLEUM INC110631 RT 1, DIBOLLDIESEL 3/6/96 2 , 2A E,QTOTAL PETROLEUM INC 111672 3010 JOHN REDDITT DR, LUFKINUNKNOWN 9/27/96 2 , 2A E,QTXDOT 096563 1805 N TIMBERLAND DR, LUFKINGASOLINE 8/2/90 2 , 2A E,Q* VERNA GRIFFITH097638 409 N 3RD ST, LUFKINGASOLINE 12/10/90 1B , 1A E,QKINGSBURY SQUARE SOUTH IH35 0.5 MI. NORTH OF FULTONTRICHLOROETHANE, MEK 1B , 1A* FORMER CIRCLE K #3435612 102 HIGHWAY 35 SOUTH, ROCKPORTHYDROCARBONS 9/16/97 0 , 5 EPETROLEUM HELICOPTERS, INC. (ROCKPORT, 343 225 JOHN WENDALL RD./ARANSAS CO. AIRPORT, TPH, JET FUEL 9/16/96 0 , 5 ETX)FULTON1ST CITY ASSET SERVICE CO 093473 816 N COMMERCE, ARANSAS PASSGASOLINE 8/7/89 2 , 6 E,QALBYS SEAFOOD 094327 CASTORLINE, FULTONDIESEL 12/19/89 2 , 2A E,QC L THOMAS PETROLEUM 111775 STAR RT 1, FULTONGASOLINE 10/11/96 2 , 2A E,QC L THOMAS PETROLEUM INC 096240 916 BRONTE, ROCKPORTGASOLINE 7/23/90 2 , 2A E,QCIRCLE K CORPORATION 105901 3031 HWY 35, FULTONUNKNOWN 12/22/92 2 , 6 E,Q* COOPER N B107144 HWY 35, ROCKPORTGASOLINE 8/17/93 2 , 2A E,QFFP OPERATING PARTNERS 102018 HWY 35, ROCKPORTGASOLINE 2/10/92 2A , 1A E,QH E BUTT GROCERY CO 092616 COMMERCIAL, ARANSAS PASSGASOLINE 2/1/89 2 , 2A E,Q* J & E OIL INC112574 210 BRONTE, ROCKPORTGASOLINE 8/26/97 1B , 1A E,Q* KEY ALLEGRO ISLE MARINA112891 37 MAZATLAN, ROCKPORTGASOLINE 10/21/97 1B , 1A E,QMAGEE GASKINS INC 110124 601 S BRONTE, ROCKPORTGASOLINE, DIESEL 11/29/95 2 , 2A E,QSOUTHERN PACIFIC LINES 109151 531 BRONTE ST, ROCKPORTGASOLINE 12/7/94 2 , 2A E,Q3B , 2AE,Q,V,1,2,3TNRCC - 3

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ARANSASPSTARCHERPSTATASCOSAENF/WSTAUSTINBAILEYPSTIHWPCD/VCPSTPSTBANDERAPSTSSP PARTNERS 110145 902 MARKET ST, ROCKPORTGASOLINE 12/8/95 2 , 5 E,Q* SSP PARTNERS110146 1902 BROADWAY, ROCKPORTGASOLINE 12/8/96 2 , 2A E,QSSP PARTNERS 110466 HWY 35, FULTONUNKNOWN 12/21/95 2A , 6 E,QSTORE PROPERTIES 108348 102 S HWY 35, ROCKPORTGASOLINE 6/29/94 2 , 2A E,QTEXAS PARKS & WILDLIFE DEPT 105522 100 NAVIGATION CIR, ROCKPORTGASOLINE 12/11/96 2 , 2A E,QVERMILLION CONSTRUCTION CO 109855 HWY 35, FULTONGASOLINE, DIESEL 9/12/95 2 , 2A E,Q* HAYGOOD & CAMPBELL110744 S ASH ST, ARCHER CITYGASOLINE 2/22/96 2 , 2A E,Q* WICHITA OIL CO106501 201 E OLIVE, HOLLIDAYGASOLINE 3/29/93 2A , 1A E,QDOWELL SCHLUMBERGER - LEMING 33565 US HWY 281 & FM 1470, LEMINGVOCS, TPH, BTEX 1/18/89 3B , 2A EQV2CEASAR DIDAURRIE 109686 501 S HWY 281, PLEASANTONGASOLINE 5/31/95 2 , 2A E,QCOPE BENNY OIL CO 099430 304 MAIN ST, PLEASANTONGASOLINE 7/1/91 2 , 3 E,QCOPE BENNY OIL CO 100143 303 BROADWAY, PLEASANTONGASOLINE, WASTE OIL 8/22/91 2 , 2A E,QDERAL KNIGHT 104175 1515 SIMMONS, JOURDANTONDIESEL 7/27/92 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO110725 210 2ND ST, PLEASANTONUNKNOWN 3/28/96 2 , 2A E,QINGRAM READY MIX INC 105711 W HWY 97, PLEASANTONDIESEL 12/11/92 2 , 6 E,QJ T SOLLOCK JR INC 095306 IH--35, LYTLEGASOLINE 3/27/90 2 , 2A E,QPLEASANTON ISD 106844 200 E ADAMS, PLEASANTONGASOLINE 6/7/93 2 , 2A E,QWEHMAN INC 094358 301 MAIN, PLEASANTONGASOLINE 12/18/89 2 , 3 E,Q* IBM-AUSTIN30576 BURNET ROAD, NORTH AUSTINCHLORINATED SOLVENTS 3A , 5 E,Q,V,2,3* CRABAR BUSINESS SYSTEMS477 1402 EAST HACIENDA ROAD, BELLVILLETPH, CHLORINATED SOLVENTS 3/3/97 0 , 3 EBERNARDO FARM & RANCH SUPPLY 097683 FM 949, CAT SPRINGGASOLINE 12/15/90 2 , 2A E,Q* BLEZINGER CLINTON100220 HWY 159, INDUSTRYGASOLINE, KEROSENE 9/6/91 2 , 5 E,QCHEVRON PRODUCTS COMPANY 096815 2007 MEYER, SEALYGASOLINE 7/25/90 2 , 2A E,QEXXON COMPANY USA 106177 1808 MYERS, SEALYGASOLINE 2/15/93 2 , 2A E,Q* FEDERAL AVIATION ADMIN112091 W IH 10, SEALYGASOLINE 1/23/97 2 , 6 E,Q* FLINTEX OIL CO111928 312 E MAIN, BELLVILLEGASOLINE 11/19/96 2 , 2A E,QSTAR ENTERPRISE 106368 1809 MYERS ST, SEALYGASOLINE, DIESEL 2/11/93 2 , 2A E,QMULESHOE COOPERATIVE GIN CO 099261 HWY 84, MULESHOEGASOLINE, DIESEL 6/12/91 2 , 2A E,QMULESHOE ISD 093475 400 AVE G, MULESHOEGASOLINE 8/3/89 2 , 2A E,QTXDOT 098774 W HWY 84, MULESHOEWASTE OIL 4/30/91 2 , 2A E,QWESTERN 66 CO 109039 715 W AMERICAN BLVD, MULESHOEGASOLINE, DIESEL, WASTE OIL 1/9/95 2 , 2A E,QUNKNOWN 092331 PARK ROAD 37, LAKE HILLSGASOLINE 11/29/88 5B , 1A E,QTNRCC - 4

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BASTROPPSTBAYLORPSTBEEBELLPCD/CAPSTIHWPCD/CAPCD/VCPSTARBUCKLE OIL CO 099805 714 CHESTNUT, BASTROPGASOLINE 7/30/91 2 , 6 E,QBARTSCH 4 110322 102 AUSTIN HWY, BASTROPGASOLINE 1/22/96 1B , 1A E,Q* BASTROP ISD111968 1602 HILL ST, BASTROPGASOLINE 12/4/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092287 902 COLLEGE, BASTROPGASOLINE 10/24/88 2 , 2A E,QCIRCLE K CORP 107261 1404 E 3RD ST, SMITHVILLEGASOLINE 9/9/93 2 , 2A E,QCITY OF ELGIN 104512 202 DEPOT ST, ELGINGASOLINE 8/21/92 2 , 2A E,QELGIN BUTLER BRICK CO 110797 FM 969, ELGINUNKNOWN 4/16/96 2A , 6 E,QFFP OPERATING PARTNERS 102608 908 COLLEGE AVE, BASTROPGASOLINE 1/27/92 2 , 2A E,Q* LINDELL INC102069 HWY 290, MCDADEGASOLINE 1/21/92 2 , 2A E,QSOUTHLAND CORP 110834 301 SHORT ST, SMITHVILLEGASOLINE 4/15/96 2 , 2A E,QSULTAN MOMIN 107994 902 CHESTNUT, BASTROPGASOLINE 3/31/94 2A , 1A E,QALLSUP'S CONVENIENCE STORES 100030 310 W CALIFORNIA, SEYMOURGASOLINE 8/5/91 2A , 6 E,QCITY OF SEYMOUR 100549 805 N BROWNING, SEYMOURGASOLINE 10/23/91 2 , 2A E,Q* GEO BIT EXPLORATION INC112658 301 E MCLAIN, SEYMOURGASOLINE, DIESEL 9/25/97 2 , 2A E,QGTE SOUTHWEST INC 107053 1002 PLAINVIEW RD, SEYMOURGASOLINE 8/2/93 2 , 2A E,QHARMEL OIL CO 095018 211 CALIFORNIA, SEYMOURGASOLINE 2/22/90 2A , 1A E,QP C PAINT & BODY 095178 321 S MAIN, SEYMOURGASOLINE 2/22/90 2A , 1A E,QSEYMOUR BUTANE CO 095017 221 MAIN, SEYMOURGASOLINE 2/22/90 2 , 2A E,QTXDOT 093076 HWY 82, SEYMOURGASOLINE 5/26/89 2 , 2A E,QNAVAL AIR STATION - CHASE FIELD 68009 5 MILES WEST OF BEEVILLE ON HWY 202ORGANICS, METALS 7/1/92 0 , 6 E,Q,V,3BEE COUNTY PRECINCT #2 099777 UNITED BLDG, BEEVILLEGASOLINE, DIESEL 8/1/91 2 , 6 E,QCOURT OF BEE COUNTY 100024 200 E CORPUS CHRISTI ST, BEEVILLEGASOLINE 8/8/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 093981 601 WASHINGTON, BEEVILLEGASOLINE 10/29/89 2 , 2A E,QMERCHANT FAST MOTOR LINE 102254 HWY 59, BEEVILLEDIESEL 3/9/92 2 , 2A E,QPAUL BAUER 098736 210 N ST MARYS, BEEVILLEGASOLINE 4/17/91 2 , 2A E,QSSP PARTNERS 103969 600 E HOUSTON, BEEVILLEGASOLINE 7/17/92 2 , 2A E,QSSP PARTNERS 110130 1911 S WASHINGTON, BEEVILLEGASOLINE 11/28/95 2 , 3 E,QTEXAS STAR INVESTMENTS INC 111976 601 N WASHINGTON, BEEVILLEGASOLINE 12/6/96 2 , 2A E,QROCKWOOL INDUSTRIES 30086 1741 E 6TH ST. BELTONARSENIC, SELENIUM 10/14/85 2D , 6C E,QROCKWOOL INDUSTRIES 30086 1741 E 6TH STREET, BELTONARSENIC, SELENIUM 10/14/85 3A,3D , 6C E,Q,V,2* CHEVRON BULK TERMINAL521 202 NORTH COLLEGE, KILLEENBTEX, TPH, METALS 5/12/97 0 , 2 EBEST BUTANE COMPANY 092561 106 CLARK ST, BARTLETTUNKNOWN 1/30/89 5B , 1A E,QBIG CHIEF DISTRIBUTORS 096132 IH-35, SALADOGASOLINE 7/3/90 2 , 2A E,Q* BIG CHIEF DISTRIBUTORS100469 906 N 8TH ST, KILLEENGASOLINE 8/28/91 2A , 1A E,Q* BURLINGTON NORTHERN SANTA FE107914 402 S 6TH ST, TEMPLEGASOLINE, DIESEL 1/18/94 2 , 2A E,QTNRCC - 5

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BELLBEXARPSTENF/WSTIHWMSWPCD/CA* DIAMOND SHAMROCK112442 1600 S IH 35, BELTONUNKNOWN 6/30/97 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091271 101 HWY 190, KILLEENGASOLINE 3/31/87 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 095689 519 E HWY 190, HARKER HEIGHTSGASOLINE 5/17/90 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099740 101 MAIN, NOLANVILLEGASOLINE 7/15/91 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099742 5418 W ADAMS, TEMPLEGASOLINE 7/15/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 099764 3602 LOOP 363, TEMPLEGASOLINE 7/15/91 2 , 6 E,QEXXON COMPANY USA 105877 3704 S GENERAL BRUCE DR, TEMPLEGASOLINE 1/13/93 2 , 6 E,Q* GUTHRIE OIL CO112764 1304 S 31ST, TEMPLEUNKNOWN 11/6/97 5B , 1A E,QKIM MYONG SOOK 095358 418 N 10TH ST, KILLEENGASOLINE 3/29/90 2 , 3 E,QLENZ MARVIN 092166 606 HWY 95, BARTLETTGASOLINE 9/15/88 2 , 2A E,QMARTIN KENNY 092118 AVE M, TEMPLEGASOLINE 9/5/88 5B , 1A E,QMICKEY'S ENTERPRISES 091115 2ND, KILLEENGASOLINE 9/6/86 2 , 2A E,Q* ODELL GEER CONSTRUCTION107919 SHALLOW FORD RD, TEMPLEDIESEL 2/23/94 2 , 2A E,QSOUTHLAND CORP 098484 506 N COLLEGE, KILLEENGASOLINE 3/29/91 2 , 2A E,QSTRASBURGER ENTERPRISES INC 101978 2218 HOLLAND, BELTONGASOLINE 2/13/92 2 , 6 E,Q* TXDOT111385 HWY 53, TEMPLEGASOLINE 5/28/96 1B , 1A E,QUNKNOWN 091987 3402 LAS MORAS, TEMPLEGASOLINE 7/6/88 2A , 1A E,QUNKNOWN 092716 200 AVE O, KILLEENUNKNOWN 2/23/89 5B , 1A E,QUS ARMY-FORT HOOD 109136 BUILDING 4489, KILLEENGASOLINE 1/15/95 1B , 1A E,Q* WILLIE PEEL DOWELL112450 IH 35, TEMPLEGASOLINE, DIESEL 6/19/97 1B , 1A E,QWM PROPERTIES 094515 FM 440, KILLEENGASOLINE 10/25/89 2 , 2A E,QZIP CAR WASH 098653 200 W HWY 190, KILLEENGASOLINE 4/15/91 2 , 2A E,QCELOTEX CORPORATION 31143 2943 WEST SOUTH CROSS, SAN ANTONIOPHENOLS, TOC,HYDROCARBON 6/18/87 2A , 3 EQV* EG&G AUTOMOTIVE RESEARCH, INC.69022 5404 BANDERA ROAD, SAN ANTONIO, TX 78238 CHROMIUM, LEAD, MERCURY, 8/11/87 3B , 1A EQV1TOTAL PETROLEUMHOWELL HYDROCARBON (AGE REFINING) 34356 7811 S. PRESA, SAN ANTONIOHYDROCARBONS 7/1/80 3B , 3 EQVSTANDARD INDUSTRIES 31653 NELSON ROAD AT RELIABLE DRIVE, SAN ANTONIO NITRATE 3/17/89 3A , 2A EUNION PACIFIC - SAN ANTONIO 34950 1711 QUINTANA RD. SAN ANTONIOTPH, DIESEL FUEL 1/9/90 3B , 4 EQVUS AIR FORCE - KELLY AFB 31750 WEST CENTRAL, SAN ANTONIOORGANICS, INORG, PCBS,HYDROCARBONS7/18/88 3B ,EQV23US AIR FORCE - RANDOLPH AFB 69011 RANDOLPH AFB, SAN ANTONIOTCE, BENZENE 5/13/88 2C , 2A VIVIA METROPOLITAN TRANSIT AUTHORITY 30549 101 MONTANA STREET, SAN ANTONIOTPH,LEAD,OTHER TRACE METALS 1/9/90 3B , 2 EV1KELLY AFB 31750 SAN ANTONIOORGANICS, INORGANICS 7/30/96 3B , 2A E,Q,VCITY OF SAN ANTONIO/ PEARSALL RD.: MW-5A,5B, 9, 10, 16, AND 16ACITY OF SAN ANTONIO/NELSON GARDEN: MW-5B, 6A, 7AMSW00633MSW012375302 PEARSALL RD., SAN ANTONIO, TX.1100 FT. N. OF NELSON RD., IMMED. S. OF MEDINAMILITARY BASE, 0.8 MI. NW OF FM 2536 (PEARSALLRD.), 1.2 MI. E. OF MACDONA AND 2.0 MI. W. OF I-410,SAN ANTONIO, TX.TDS, Cl, TOC (ALL WELLS), VOCsTRACE (MW-5A, 9,16)NO3, VOCs (TCE, PCE, AND CIS-1,2-DICHLOROETHENE).3/10/88 2B , 2A E,Q,V,23/29/93 2B , 4 E,Q,V,2ALAMO CEMENT COMPANY 61136 HWY 281 & BASSE RD, SAN ANTONIOCR & PH 10/21/93 3 , 0 EBROOKS AIR FORCE BASE 31922 2909 NORTH ROAD, SAN ANTONIOORGANICS 12/1/89 2B , 3,4 E,QCAMP STANLEY 69026 25800 RALPH FAIR RD., BOERNEHALOGENATED VOLATILEORGANICS8/1/91 4B , 4 E,Q,V,2TNRCC - 6

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BEXARPCD/CAPCD/ENFPCD/SUPPCD/VCPSTCITY PUB SVC BD - SAN ANTONIO, SALADO ST 37555 511 S. SALADO, SAN ANTONIOTPH 11/21/89 0 , 2 EQDEFENSE REUTILIZATION AND MARKETING 34690 KELLY AIR FORCE BASE, SAN ANTONIOTCE 2/28/92 3A , 2A E,QOFFICEINTERCHANGE OFFICE PARK 30637 LOOP 410, SAN ANTONIOSOLVENTS, LEAD 5/29/84 0 , 5 EKELLY AIR FORCE BASE 31750 SAN ANTONIOORGANICS, INORGANICS 7/30/96 3B , 2,3,4 E,Q,V,3LACKLAND AIR FORCE TRAINING ANNEX 50334 SAN ANTONIOBENZENE, DICHLOROBENZENE,DIESEL FUEL, TCE, METALS6/1/88 3A , 2A E,V,Q,3RANDOLPH AIR FORCE BASE 69011 SAN ANTONIOBENZENE,TCE,TRANS1,2,DICHLORETHYL6/7/88 3B , 2A E,Q,V,1,2,3SOUTHERN PACIFIC TRANS. CO.-SAN ANTONIO 39368 802 OLD SEGUIN, SAN ANTONIOPESTICIDES 1/14/86 2 , 2A EQSOUTHWEST RESEARCH INSTITUE 52096 6220 CALEBRA RD, SAN ANTONIOVOCS 3/13/90 0 , 2A EQV2STANDARD INDUSTRIES 31653 NELSON RD AT RELIABLE DR., SAN ANTONIONITRATES 3/17/89 3A,B , 6C ECHEMCENTRAL 36396 1107 E. SOUTHCROSS ST., SAN ANTONIOVOC, MEK 10/31/86 0 , 3 E YEXXON CO USA - SAN ANTONIO 37962 QUINTANA DR., SW MILITARY DRIVE, SAN ANT PETROLEUM RELEASES,8/3/88 2B , 2A EQV123 YDISPOSAL ACTIVITIESSCHNECK AVIATION 31791 1222 99TH AVE., SAN ANTONIOVOCS,SVOCS,CR,PB,CD,TPH 1/7/91 2A , 3 ESTAR ENTERPRISE - SAN ANTONIO 35848 510 PETROLEUM DR., SAN ANTONIOTPH, BTEX, LEAD, CHROMIUM 10/30/89 2A , 2A EQFIRST QUALITY CYLINDER, INC. (AEROCHROME) 931 WEST LAUREL ST., SAN ANTONIOCHROMIUM 1B , 1A E,QHARRIS SAND PITS STATE SUPERFUND SITE23340 S. HWY. 16, APPROX. 10.5 MI. S. OF SAN ORGANIC SOLVENTS, CHROMIUM, 8/1/94 3B , 3 E,Q,V,1,2,3ANTONIOSULPHATESHOLBROOK STREET 48070 IH 35 AND LOOP 410E, SAN ANTONIOLEAD, 4 METHYL PHENOL 12/1/93 5B , 4 E,Q,2J. C. PENNCO 52029 4927 HIGDON RD., SAN ANTONIOSOLVENT, HYDROCARBONS 2 , 2 EPIONEER OIL AND REFINING STATE SUPERFUNDSITE20280 SOUTH PAYNE RD., SOMERSET, TX.HEAVY METALS, HYDROCARBONS 4/11/94 5B , 2A E,Q,V,2,3COUNTRYSIDE PLAZA SHOPPING CENTER 276 HIGHWAY 281 @ BITTERS ROAD, SAN ANTONIO CHLORINATED SOLVENTS 6/13/96 0 , 2 E* FORMER INDUSTRIAL LUBRICANTS - QUAKER 582 434 RIVERSIDE DRIVE, SAN ANTONIOPETROLEUM SUBSTANCES 7/31/97 0 , 6B ESTATE* FORMER WINN'S STORES DISTRIBUTION CENTER 282 4342 PAN AM EXPRESSWAY, SAN ANTONIOSOLVENTS 6/27/96 2 , 0 E* NEW CITY BLOCK (NCB) 637/ALAMODOME 442 SE CORNER SOUTH CHERRY AND MLK DRIVE, SAN METALS 1/23/97 0 , 6 EANTONIO* SAN ANTONIO HOUSING AUTHORITY190 1901 SOUTH SAN MARCOS STREET, SAN ANTONIO PAHS 3/5/96 0 , 2 EA J PLOCH OIL CO 108203 11570 W IH--10, SAN ANTONIOGASOLINE, DIESEL 5/4/93 2 , 2A E,QA J PLOCH OIL CO INC 093878 1318 E IH-10, SAN ANTONIODIESEL 10/24/89 2 , 2A E,QA J PLOCH OIL CO INC 104613 2523 RIGSBY, SAN ANTONIOGASOLINE, WASTE OIL 8/18/92 2 , 2A E,QALAMO PAPER TUBE CO 095798 4718 DODGE ST, SAN ANTONIOGASOLINE 5/29/90 2 , 2A E,Q* ALAN GURINSKY112453 6001 WEST AVE, SAN ANTONIOGASOLINE 7/2/97 1B , 1A E,QALEXANDER SACKTON 106513 4003 E SOUTHCROSS, SAN ANTONIOGASOLINE 4/6/93 2 , 2A E,QAMERCO REAL ESTATE COMPANY 092279 2566 NW LOOP 410, SAN ANTONIOGASOLINE 11/3/88 2 , 2A E,QAMJAD PANJWANI 101866 719 PALO ALTO RD, SAN ANTONIOGASOLINE 2/13/92 2 , 2A E,QASSOCIATED TRUCKING 101452 4303 NE LOOP 1604, SAN ANTONIOGASOLINE, DIESEL 12/31/91 2A , 1A E,Q* AUTO FUEL COMPANY INC110231 1618 S ZARZAMORA, SAN ANTONIOGASOLINE, DIESEL 10/27/94 2 , 2A E,QAVIS RENT A CAR SYSTEM 098879 9603 JOHN SAUNDERS RD, SAN ANTONIODIESEL 5/9/91 2 , 2A E,QBARRINGTON INTERNATIONAL CORP 100710 1815 FREDERICKSBURG RD, SAN ANTONIOGASOLINE 9/13/89 5B , 2A E,Q* BEAR OIL CO112753 12015 N LOOP RD, SAN ANTONIOUNKNOWN 11/5/97 2A , 1A E,QTNRCC - 7

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BEXARPST* BELLE RIVE INVESTMENTS L L C112702 815 AVE B, SAN ANTONIOGASOLINE 8/25/97 1B , 1A E,QBORDEN INC 098450 875 E ASHBY PL, SAN ANTONIOGASOLINE, WASTE OIL 2/12/91 2A , 6 E,QBORDEN PKGING & IND PRODUCTS 093052 422 CAROLINA ST, SAN ANTONIOGASOLINE 10/7/89 2 , 5 E,QBRADEN OIL CO 107061 2627 GOLIAD, SAN ANTONIOGASOLINE 7/22/93 2 , 2A E,QBRIDGESTONE FIRESTONE INC 111975 16633 SAN PEDRO, SAN ANTONIOUNKNOWN 12/19/96 1B , 1A E,QBRIDGESTONE/FIRESTONE, INC. 109952 2418 SW MILITARY DR, SAN ANTONIOGASOLINE 11/16/93 2 , 2A E,QBROWNING FERRIS INC RECYCLING 105707 4000 PROBANDT, SAN ANTONIOGASOLINE 12/22/92 2 , 6 E,QC & W MANHATTEN & ASSOC 103305 3159 PAN AMERICAN EXWY, SAN ANTONIOGASOLINE, DIESEL 4/30/92 2A , 1A E,Q* CAMBRIDGE REALTY GROUP109001 2300 BROADWAY, SAN ANTONIOUNKNOWN 5/8/94 2 , 2A E,QCELOTEX 093806 2943 W SOUTHCROSS BLVD, SAN ANTONIOGASOLINE 9/18/89 2 , 2A E,QCENTRAL PROPERTIES INC 098155 1047 SE MILITARY DR, SAN ANTONIODIESEL 2/19/91 2 , 6 E,Q* CHAPMAN INTERESTS INC110675 303 BLUM ST, SAN ANTONIOUNKNOWN 3/25/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091008 2899 THOUSAND OAKS DR, SAN ANTONIOGASOLINE 12/19/83 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091134 13980 NACOGDOCHES RD, SAN ANTONIODIESEL 7/3/86 2 , 3 E,QCHEVRON PRODUCTS COMPANY 093260 6801 W HWY 90, SAN ANTONIOGASOLINE 6/14/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093601 603 PLEASANTON RD, SAN ANTONIOGASOLINE 9/6/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093842 11055 N IH-35, SAN ANTONIOGASOLINE 10/5/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093879 4602 NW LOOP 410, SAN ANTONIOUNKNOWN 10/24/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093920 4802 WALZEM RD, SAN ANTONIOGASOLINE 11/13/89 2 , 5 E,QCHEVRON PRODUCTS COMPANY 093941 903 SW MILITARY DR, SAN ANTONIOGASOLINE 10/30/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094201 4035 HOUSTON ST, SAN ANTONIOGASOLINE 12/18/89 2 , 5 E,QCHEVRON PRODUCTS COMPANY 097069 8210 MARBACH RD, SAN ANTONIOGASOLINE 6/26/90 2 , 2A E,QCHEVRON USA INC 091313 10034 SAN PEDRO AVE, SAN ANTONIODIESEL 5/16/87 2A , 6 E,QCHEVRON USA INC 093307 4714 FREDERICKSBURG RD, SAN ANTONIOGASOLINE 6/14/89 2A , 6 E,QCHEVRON USA INC 098951 701 N MAIN ST, SAN ANTONIOGASOLINE 11/19/90 2A , 6 E,QCINCO J INC 107643 6601 LAKEVIEW, SAN ANTONIOGASOLINE 12/16/93 2 , 2A E,QCIRCLE K CORP 091970 9129 FM 78, CONVERSEGASOLINE 6/16/88 5B , 1A E,Q* CIRCLE K CORP106910 2314 COMMERICAL AVE, SAN ANTONIOGASOLINE 6/18/93 2 , 2A E,QCIRCLE K STORES, INC. 091243 803 W OLD HWY 90, SAN ANTONIOGASOLINE 1/18/86 2 , 2A E,Q* CITY OF SAN ANTONIO110476 4719 S ZARZAMORA, SAN ANTONIOUNKNOWN 3/6/96 1B , 1A E,QCITY OF SAN ANTONIO 111018 700 W COMMERCE, SAN ANTONIODIESEL 8/28/96 2 , 6 E,QCITY OF SAN ANTONIO/AUTO OP 092040 1215 NORTHERN BLVD, SAN ANTONIOGASOLINE 7/1/88 2 , 6 E,QCITY OF SAN ANTONIO/AUTO OP 092127 214 W NUEVA, SAN ANTONIOGASOLINE 9/15/88 2 , 2A E,QCITY OF SAN ANTONIO/AUTO OP 092185 2002 NW 36TH ST, SAN ANTONIOGASOLINE 2/25/88 2 , 2A E,QCITY OF SAN ANTONIO/AUTO OP 092494 7000 CULEBRA, SAN ANTONIODIESEL 1/17/89 2 , 6 E,QCITY OF SAN ANTONIO/AUTO OP 092751 8514 MISSION RD, SAN ANTONIOGASOLINE 3/15/89 2A , 6 E,QCITY OF SAN ANTONIO/AUTO OP 093299 JOHN SAUNDERS, SAN ANTONIOGASOLINE 6/28/89 1B , 1A E,QCITY OF SAN ANTONIO/AUTO OP 094636 4531 S ZARZAMORA ST, SAN ANTONIODIESEL 1/9/90 2A , 1A E,QCITY OF SAN ANTONIO/AUTO OP 095305 2323 BUENA VISTA, SAN ANTONIOGASOLINE 3/20/90 2 , 6 E,QCITY OF SAN ANTONIO/PUB WORKS 104249 S FRIO, SAN ANTONIOUNKNOWN 8/14/92 2 , 2A E,QCITY OF SAN SAN ANTONIO 111868 200 E MARKET, SAN ANTONIOHYDR FLUID 8/6/96 1B , 1A E,QCITY PUBLIC SERVICE 104566 915 MATAMORAS, SAN ANTONIOGASOLINE 9/5/92 2A , 6 E,QCOASTAL REFINING & MARKETING 093678 9010 TESORO DR, SAN ANTONIOUNKNOWN 8/1/89 2 , 2A E,QCOLUMBIA INDUSTRIES 103134 5005 WEST AVE, SAN ANTONIOGASOLINE, CHEMICAL 5/19/92 2A , 1A E,QCONLEY LOTT & NICHOLS 104048 5300 SE LOOP 410, SAN ANTONIOWASTE OIL, OTHER 7/17/92 2 , 2A E,QCONOCO, INC. 106752 5403 EVERS RD, SAN ANTONIOGASOLINE 5/10/93 2 , 2A E,QCRAIN DISTRIBUTING CO. INC. 095696 611 N CHERRY, SAN ANTONIOWASTE OIL 5/3/90 2A , 1A E,QCRYSANTHE GALNOS 099558 901 NOGALIITOS ST, SAN ANTONIOGASOLINE 5/16/91 1B , 6 E,QTNRCC - 8

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BEXARPSTCURRENT OCCUPANT 092645 3127 ACKERMAN RD, KIRBYGASOLINE 2/16/89 2 , 2A E,Q* DAYTON HUDSON CO C/O TARGET111524 2514 SW MILITARY DR, SAN ANTONIOUNKNOWN 8/22/96 2 , 2A E,QDE LA ROSA, RALPH 099559 730 NOGALITOS, SAN ANTONIOGASOLINE 5/15/91 5B , 1A E,QDIAMOND SHAMROCK 092555 619 W MALONE, SAN ANTONIOGASOLINE 1/25/89 2 , 2A E,QDIAMOND SHAMROCK 095114 123 WHITEWOOD, SAN ANTONIOGASOLINE 2/9/90 2 , 6 E,QDIAMOND SHAMROCK 095274 5106 RANDOLPH BLVD, SAN ANTONIOGASOLINE 3/31/90 2 , 2A E,QDIAMOND SHAMROCK 099300 5214 CALLAGHAN, SAN ANTONIOGASOLINE 8/15/89 2 , 2A E,Q* DIAMOND SHAMROCK111505 451 HOT WELLS BLVD, SAN ANTONIOGASOLINE 8/8/97 2 , 2A E,QDIAMOND SHAMROCK R & M 093466 707 FRIO CITY RD, SAN ANTONIOGASOLINE 7/31/89 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 092108 W MILITARY DR, SAN ANTONIOGASOLINE 8/25/88 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 092332 5126 BLANCO RD, SAN ANTONIOGASOLINE 11/29/88 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 094094 6910 S FLORES, SAN ANTONIOGASOLINE 11/28/89 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 094237 703 N ZARZAMORA ST, SAN ANTONIOGASOLINE 12/4/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 094238 2601 NOGALITOS, SAN ANTONIOGASOLINE 11/30/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 094542 8722 PERRIN BEITEL, SAN ANTONIOCHEMICAL 1/16/90 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 094700 12573 WETMORE RD, SAN ANTONIOGASOLINE 1/25/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 098012 5102 RITTIMAN RD, SAN ANTONIOGASOLINE 1/4/91 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 098013 2520 BROADWAY, SAN ANTONIOGASOLINE 1/8/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 098017 11711 O'CONNOR RD, SAN ANTONIOGASOLINE 1/14/91 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 098018 1171 COLISEUM RD, SAN ANTONIOGASOLINE 1/14/91 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 098020 5239 RIGSBY RD, SAN ANTONIOGASOLINE 1/4/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 098440 1002 CASTROVILLE RD, SAN ANTONIOGASOLINE 1/8/91 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 098586 4722 WEST AVE, SAN ANTONIOGASOLINE 3/28/91 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO098612 4327 VANCE JACKSON RD, SAN ANTONIOGASOLINE 1/3/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 100288 4338 W COMMERCE, SAN ANTONIOGASOLINE 9/20/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 100951 451 NEW LAREDO HWY, SAN ANTONIOGASOLINE 11/19/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 102997 4507 RITTIMAN RD, SAN ANTONIOGASOLINE 4/30/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 103518 1419 CASTROVILLE RD, SAN ANTONIOGASOLINE, DIESEL 5/29/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 103524 3225 COMMERCIAL, SAN ANTONIOGASOLINE 6/16/92 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 104283 819 E MULBERRY, SAN ANTONIOGASOLINE 8/19/92 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO108041 5101 MCCULLOUGH, SAN ANTONIOGASOLINE 12/3/94 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO108044 8235 BROADWAY, SAN ANTONIOGASOLINE 11/5/93 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO109310 3322 PLEASANTON RD, SAN ANTONIOGASOLINE 1/21/95 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO110723 3313 S GEVERS, SAN ANTONIOUNKNOWN 3/28/96 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO110724 926 COLISEUM RD, SAN ANTONIOUNKNOWN 3/28/96 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 111111 628 W HILDEBRAND, SAN ANTONIOUNKNOWN 6/3/96 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO112224 16555 HUEBNER RD, SAN ANTONIOUNKNOWN 4/14/97 1B , 1A E,QDITTMAR LUMBER CORP 105897 500 SEGUIN RD, SAN ANTONIOGASOLINE, DIESEL 12/16/92 1B , 1A E,QDONAHO VIVIAN C 099460 161 WARD AVE, SAN ANTONIODIESEL 7/1/91 2A , 6 E,QE Z MART STORES INC 096960 1234 PAT BOOKER RD, UNIVERSAL CITYGASOLINE 9/25/90 2 , 2A E,QEAST CENTRAL ISD 111280 6634 NEW SULPHUR SPRINGS RD, SAN ANTONIO GASOLINE, WASTE OIL 6/25/96 2 , 2A E,Q* EDDIE WYATT INC112491 155 S W W WHITE RD, SAN ANTONIOGASOLINE 7/21/97 1B , 1A E,QEG&G AUTOMOTIVE RESEARCH INC. 092325 5420 BANDERA RD, SAN ANTONIOUNKNOWN 8/1/88 2 , 2A E,QEXXON COMPANY USA 091493 1554 BANDERA RD, SAN ANTONIOGASOLINE 8/21/87 2 , 4 E,QEXXON COMPANY USA 091520 4678 WALZEM RD, SAN ANTONIOUNKNOWN 10/27/87 2 , 2A E,QEXXON COMPANY USA 091612 3926 W COMMERCE, SAN ANTONIOGASOLINE 1/15/88 2 , 6 E,QEXXON COMPANY USA 092113 2706 CULEBRA, SAN ANTONIOGASOLINE 5/31/88 2 , 4 E,QEXXON COMPANY USA 092327 6523 SAN PEDRO AVE, SAN ANTONIOGASOLINE 12/5/88 2A , 6 E,QTNRCC - 9

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BEXARPSTEXXON COMPANY USA 093248 3214 N PAN AM EXPY, SAN ANTONIOGASOLINE 6/29/89 2 , 4 E,QEXXON COMPANY USA 093250 9623 W TERMINAL DR, SAN ANTONIOJET FUEL 6/28/89 2 , 6 E,QEXXON COMPANY USA 096979 103 S WW WHITE RD, SAN ANTONIOGASOLINE 10/18/90 2 , 2A E,QEXXON COMPANY USA 097819 9623 W TERMINAL DR, SAN ANTONIOGASOLINE 1/25/91 2A , 1A E,QEXXON COMPANY USA 099271 7003 W HWY 90, SAN ANTONIOGASOLINE 6/14/91 2 , 6 E,QEXXON COMPANY USA 103432 4426 BLANCO, SAN ANTONIOGASOLINE, WASTE OIL 6/11/92 2A , 6 E,Q* EXXON COMPANY USA107086 2302 W AVENUE, SAN ANTONIOHYDR FLUID 5/17/93 2 , 2A E,Q* EXXON COMPANY USA110174 2302 WEST AVE, SAN ANTONIODIESEL 9/25/95 2A , 1A E,QFDIC 100659 502 RIVERSIDE DR, SAN ANTONIOGASOLINE, DIESEL 9/19/91 2A , 6 E,QFISCA OIL CO INC 094025 2302 SE MILITARY DR, SAN ANTONIOGASOLINE 11/7/89 2 , 4 E,QFOREST HILL MANAGEMENT CO 111506 1030 PATRICIA, SAN ANTONIOUNKNOWN 8/22/96 1B , 1A E,QGARCIA FOOD PRODUCTS 107721 1106 CULEBRA, SAN ANTONIOGASOLINE 12/21/93 2A , 6 E,QGENERAL RENT-A-CAR 093042 1111 JOHN HUTH, SAN ANTONIOJET FUEL 5/24/89 2 , 2A E,QGIBSON PLUMBING CO 103304 5511 DIETRICH RD, SAN ANTONIODIESEL 4/20/92 2 , 2A E,QGLAZERS WHOLESALE DISTRIBUTORS 106337 3030 ANIOL, SAN ANTONIOGASOLINE, DIESEL 2/26/93 2 , 6 E,QGREG KOWALSKI 109339 1220 E COMMERCE, SAN ANTONIOGASOLINE 3/15/95 2A , 1A E,QGUNN BUICK 111866 11911 W IH 10 , SAN ANTONIOUNKNOWN 1B , 6 E,Q* GUNN NISSAN112439 12838 SAN PEDRO, SAN ANTONIOHYDR FLUID 6/25/97 2 , 6 E,QH E BUTT GROCERY CO 099399 4700 N PAN AM EXPY, SAN ANTONIODIESEL 4/13/89 2 , 2A E,QH E BUTT GROCERY CO 100978 4710 N PAN AM EXPY, SAN ANTONIODIESEL 12/30/91 2 , 2A E,QH E BUTT GROCERY CO 109311 9755 W IH-10, SAN ANTONIOGASOLINE 8/12/94 1B , 1A E,QHAYES LEASING CO INC 091350 9603 JOHN SAUNDERS RD, SAN ANTONIOGASOLINE 6/7/87 2 , 4 E,QHE BUTT GROCERY CO 105623 4710 N PAN AM EXWY, SAN ANTONIOGASOLINE, DIESEL 12/21/92 2 , 2A E,QHERTZ CORP 093256 1331 S TERMINAL DR, SAN ANTONIOGASOLINE 7/13/89 2 , 2A E,Q* JOEL CANALES111885 5643 FREDERICKSBURG, SAN ANTONIOGASOLINE 9/30/96 2 , 2A E,QJOHNNIES PLASTIC INC 099941 725 FLORIDA ST, SAN ANTONIOGASOLINE 8/15/91 2 , 6 E,QJUDSON ISD 104334 210 SCHOOL ST, CONVERSEGASOLINE 8/21/92 2 , 5 E,QKITTIE PETRO INC. 091307 1251 HIGHLAND BLVD, SAN ANTONIOUNKNOWN 4/12/87 2 , 2A E,QKMART CORP 106750 7171 W HWY 90, SAN ANTONIOWASTE OIL 5/10/93 2 , 2A E,Q* LONE STAR ICE STORES112355 16264 SAN PEDRO, SAN ANTONIOGASOLINE 6/3/97 1B , 1A E,Q* LOU MONDRAGON111992 2320 S ZARZAMORA, SAN ANTONIOGASOLINE 10/31/96 2 , 2A E,QMAPCO INC 092406 3703 SW MILITARY DR, SAN ANTONIOWASTE OIL 12/21/88 2 , 2A E,QMAPCO INC 092454 7398 MARBACH RD, SAN ANTONIOWASTE OIL 12/21/88 2 , 2A E,QMAPCO INC 092455 7751 W HWY 90, SAN ANTONIOWASTE OIL 12/21/88 2 , 2A E,QMARTIN RANGEL 103511 702 W SOUTHCROSS, SAN ANTONIOGASOLINE 5/29/92 5B , 2A E,QMARTIN WRIGHT ELECTRIC COMPANY 103473 227 W OLMES DR, SAN ANTONIOUNKNOWN 6/28/92 2 , 6 E,QMARVIN ABOLOFF 093643 1005 DONALDSON AVE, SAN ANTONIOGASOLINE 9/8/89 2 , 6 E,QMCMARR PROPERTIES 104248 5822 STEMMONS DR, SAN ANTONIOGASOLINE 7/14/92 2A , 6 E,QMISSION PARK INTERESTS, INC. 094026 1700 SE MILITARY DR, SAN ANTONIOGASOLINE 11/7/89 2 , 3 E,QMOBIL OIL CORP 093053 2629 PERRIN BEITEL, SAN ANTONIOGASOLINE 10/19/89 2 , 6 E,QMOBIL OIL CORP 093214 4681 WALZEM RD, SAN ANTONIOGASOLINE 10/19/88 2 , 4 E,QMOBIL OIL CORP 104926 8426 BROADWAY, SAN ANTONIOGASOLINE 10/7/92 2 , 6 E,QMOBIL OIL CORP 105078 1118 VANCE JACKSON, SAN ANTONIOGASOLINE 10/7/92 2 , 2A E,QMOBIL OIL CORP 105080 12351 N IH--35, SAN ANTONIOGASOLINE 9/22/92 2 , 6 E,QMOBIL OIL CORP 105164 10110 SAN PEDRO AVE, SAN ANTONIOGASOLINE 10/1/92 2 , 2A E,QMOBIL OIL CORP 105820 4303 CALLAGHAN RD, SAN ANTONIOHYDR FLUID 9/29/92 2A , 1A E,QMOUSES SMOKEHOUSE 108837 26098 N HWY 281, BULVERDEGASOLINE 10/31/94 2A , 1A E,QMS. JANE BURKE, LANDOWNER 105493 3619 S ZARZAMORA, SAN ANTONIOUNKNOWN 11/16/92 2 , 2A E,QTNRCC - 10

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BEXARPSTNATIONAL CONVENIENCE BANKRUPT 111105 311 ST CLOUD, SAN ANTONIOGASOLINE 5/22/96 5B , 1A E,QNATIONAL CONVENIENCE BANKRUPT 111108 7208 BROOK VALLEY, SAN ANTONIOGASOLINE 5/23/96 5B , 1A E,QNATIONAL CONVENIENCE BANKRUPT 111112 6017 INGRAM, SAN ANTONIOGASOLINE 5/23/96 5B , 1A E,QNATIONAL CONVENIENCE STORES 091959 1302 CULEBRA, SAN ANTONIOGASOLINE 6/14/88 5B , 2A E,QNATIONAL CONVENIENCE STORES 094970 1502 HILDEBRAND, SAN ANTONIOGASOLINE 2/6/90 5B , 2A E,QNATIONAL LINEN SERVICE 104335 614 NOGALITOS ST, SAN ANTONIOOTHER 7/14/92 2A , 6 E,QNEILL BOLDRICK 104251 309 S SALADO, SAN ANTONIOGASOLINE 8/11/92 2 , 2A E,QNEW HOLLAND NORTH AMERICA INC 109763 4690 NOYES RD, VON ORMYUNKNOWN 4/19/95 2A , 1A E,QOGDEN ALLIED AVIATION SERVICES 093258 1396 S TERMINAL DR, SAN ANTONIOJET FUEL 6/12/89 2 , 4 E,QORTIZ FRANK 092761 138 CASTROVILLE RD, SAN ANTONIOGASOLINE 11/22/88 2A , 1A E,QPAGE AVJET, SIGNATURE FLIGHT 107006 2230 W SOUTHCROSS BLVD, SAN ANTONIOGASOLINE 6/28/93 2 , 2A E,QPENSKE TRUCK LEASING CO 093379 3000-A E HOUSTON ST, SAN ANTONIODIESEL 7/27/89 2 , 6 E,QPERRYMAN, JOHN 092411 651 PORTER, SAN ANTONIOGASOLINE 12/16/88 2 , 4 E,QPEVETO COMPANIES INC 091831 7119 BLANCO RD, SAN ANTONIOGASOLINE 3/29/88 2 , 2A E,QPHC INC 095891 400 E MELROSE DR, SAN ANTONIOGASOLINE 5/23/90 2 , 5 E,QPHILLIPS PAPER CORP 098964 3000 E HOUSTON ST, SAN ANTONIOGASOLINE 3/12/91 2 , 2A E,QPIONEER CONCRETE OF TEXAS INC 099972 500 STEVES AVE, SAN ANTONIODIESEL 8/23/91 2 , 6 E,QPIONEER OIL CO 091961 2320 N ZARZAMORA ST, SAN ANTONIOGASOLINE 6/15/88 2 , 5 E,QQUEST REALTY INC 108365 5392 W MILITARY, SAN ANTONIOGASOLINE, WASTE OIL 6/24/94 2A , 1A E,QQUICK STOP STORES INC 093904 433 HWY 81, SAN ANTONIOGASOLINE 10/19/89 5B , 2A E,QRICHTERS BAKERY 108910 6000 NE LOOP 410, SAN ANTONIOGASOLINE 12/7/94 2 , 6 E,QROBERTO HERNANDEZ 095701 2703 COMMERCIAL AVE, SAN ANTONIOGASOLINE 5/31/90 2 , 2A E,QROYAL CROWN COLA CO 100605 120 W JOSEPHINE, SAN ANTONIOGASOLINE, DIESEL 4/9/91 2 , 4 E,QS & P CO 093657 312 PEARL PKWY, SAN ANTONIODIESEL 9/5/89 2 , 6 E,Q* SALLY W CAIN & G CAIN TRUSTS111509 724 N ZARZAMORA, SAN ANTONIOGASOLINE 7/12/96 2 , 2A E,Q* SALLY W CAIN & G CAIN TRUSTS111510 1800 RIGSBY RD, SAN ANTONIOGASOLINE, WASTE OIL 7/29/96 2 , 2A E,QSALVADOR GARZA 096177 4018 S FLORES, SAN ANTONIOGASOLINE 6/18/90 2A , 1A E,Q* SAN ANTONIO EXPRESS NEWS110427 237 CENTER ST, SAN ANTONIOUNKNOWN 3/4/96 2 , 2A E,QSAN ANTONIO ISD 103834 1110 AUSTIN ST, SAN ANTONIOGASOLINE 7/10/92 2 , 2A E,QSAN ANTONIO WATER SYSTEMS 093034 515 MISSION RD, SAN ANTONIOGASOLINE 5/15/89 2 , 2A E,QSOUTHERN MERCHANDISE & STORAGE 100092 3232 PAN AM EXPY, SAN ANTONIOGASOLINE 8/12/91 2A , 6 E,QSOUTHERN PACIFIC LINES 095893 1201 SHERMAN ST, SAN ANTONIOGASOLINE 5/21/90 2 , 2A E,QSOUTHERN PACIFIC LINES 096396 1201 SHERMAN ST, SAN ANTONIOWASTE OIL 5/16/90 2 , 2A E,QSOUTHLAND CORP 092096 9334 GUILBEAU RD, SAN ANTONIOGASOLINE 8/26/88 2 , 2A E,QSOUTHLAND CORP 092429 5530 SW MILITARY DR, SAN ANTONIOGASOLINE 12/22/88 2 , 3 E,QSOUTHLAND CORP 092467 2023 N ZARZAMORA ST, SAN ANTONIOGASOLINE 1/5/89 5B , 2A E,QSOUTHLAND CORP 092483 7557 MCCULLOUGH AVE, SAN ANTONIOGASOLINE 1/9/89 2 , 6 E,QSOUTHLAND CORP 092502 4302 MCCULLOUGH, SAN ANTONIOGASOLINE 1/16/89 2 , 2A E,QSOUTHLAND CORP 092503 1136 E GRAYSON, SAN ANTONIOGASOLINE 1/16/89 2 , 2A E,QSOUTHLAND CORP 092504 202 S TRINITY, SAN ANTONIOGASOLINE 1/13/89 2 , 2A E,QSOUTHLAND CORP 092554 3103 W MARTIN, SAN ANTONIOGASOLINE 1/25/89 2 , 2A E,QSOUTHLAND CORP 092556 539 W SOUTHCROSS, SAN ANTONIOGASOLINE 1/25/89 2 , 4 E,QSOUTHLAND CORP 092675 14330 NACOGDOCHES RD, SAN ANTONIOGASOLINE 3/8/89 2 , 6 E,QSOUTHLAND CORP 098244 6565 BABCOCK RD, SAN ANTONIOGASOLINE 2/22/91 2 , 2A E,QSOUTHLAND CORP 098543 6067 DE ZAVALA RD, SAN ANTONIOGASOLINE 9/15/89 2 , 2A E,QSOUTHLAND CORP 098567 12303 WETMORE RD, SAN ANTONIOGASOLINE 8/15/89 2 , 2A E,QSOUTHLAND CORP 099298 2033 BANDERA RD, SAN ANTONIOGASOLINE 8/15/89 2 , 2A E,QSOUTHLAND CORP 099302 7715 S ZARZAMORA, SAN ANTONIOGASOLINE 1/3/89 2 , 2A E,QTNRCC - 11

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BEXARPSTSOUTHLAND CORP 099317 837 FRESNO ST, SAN ANTONIODIST F OIL 8/15/89 2 , 2A E,Q* SOUTHLAND CORP103568 13303 JUDSON RD, SAN ANTONIOGASOLINE 6/15/92 2 , 2A E,QSOUTHMOST TERMINAL INC 110864 14650 S IH-35, SAN ANTONIOGASOLINE 4/17/96 1B , 1A E,QSOUTHWEST RESEARCH INSTITUTE 093551 6220 CULEBRA, SAN ANTONIODIESEL 8/24/89 2 , 6 E,QSOUTHWEST RESEARCH INSTITUTE 096750 555 AVE C #156, SAN ANTONIOGASOLINE 9/4/90 2 , 6 E,QSOUTHWEST RESEARCH INSTITUTE 099564 1303 4TH ST, SAN ANTONIOGASOLINE, DIESEL 7/12/91 2 , 2A E,QSOUTHWEST RESEARCH INSTITUTE 100782 535 TOM SLICK AVE BLDG 87, SAN ANTONIOALCOH FUEL 11/5/91 2A , 1A E,Q* SOUTHWEST RESEARCH INSTITUTE111508 1210 5TH ST BLDG 75S, SAN ANTONIOGASOLINE 7/26/96 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 092866 4119 BROADWAY, SAN ANTONIOGASOLINE 4/20/89 2 , 2A E,Q* SOUTHWESTERN BELL TELEPHONE CO098495 9445 E LOOP 1604, CONVERSEGASOLINE 4/3/91 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 102429 1735 COMMERCIAL AVE, SAN ANTONIOHYDR FLUID 2/9/92 2 , 2A E,QSPIRES LEASING CORP-DOUGLAS JL 102326 501 BROADWAY, SAN ANTONIOGASOLINE 3/25/92 2 , 2A E,QSTAGLIK DON R 092322 8519 MCCULLOUGH, SAN ANTONIOGASOLINE 4/20/87 2 , 2A E,QSTAR ENTERPRISE 093106 201 N CROSSROADS BLVD, SAN ANTONIOGASOLINE 5/4/89 2 , 6 E,QSTAR ENTERPRISE 094635 2348 E COMMERCE, SAN ANTONIOGASOLINE 1/10/90 2 , 6 E,QSTAR ENTERPRISE 097349 418 FAIR AVE, SAN ANTONIOGASOLINE 10/15/90 2A , 6 E,QSTAR ENTERPRISE 099413 4825 WALZEM RD, SAN ANTONIOGASOLINE 3/8/91 2 , 6 E,QSTAR ENTERPRISE 099426 1526 N NEW BRAUNFELS, SAN ANTONIOUNKNOWN 7/2/91 2 , 2A E,QSTAR ENTERPRISE 103322 2002 SW MILITARY DR, SAN ANTONIOGASOLINE 4/30/92 2 , 2A E,QSTAR ENTERPRISE 111519 8501 BROADWAY, SAN ANTONIOGASOLINE, DIESEL 8/9/96 1B , 1A E,Q* STAR ENTERPRISE112161 5346 ROOSEVELT, SAN ANTONIOUNKNOWN 3/13/97 2 , 2A E,QSTRASBURGER ENTERPRISES INC 091173 1618 S ZARZAMORA ST, SAN ANTONIOUNKNOWN 1/15/85 1B , 1A E,QSTRASBURGER ENTERPRISES INC 091460 7737 SW MILITARY RD, SAN ANTONIODIESEL 8/25/87 2 , 2A E,QSUNGLO 095036 2831 GUADALUPE, SAN ANTONIOGASOLINE 3/5/90 2 , 2A E,Q* SUNGLO INC112147 1706 CULEBRA, SAN ANTONIOUNKNOWN 3/3/97 1B , 1A E,QSURLEAN MEAT COMPANY 096745 1545 S SAN MARCOS ST, SAN ANTONIODIESEL 9/5/90 2 , 6 E,QSWEENEY & CO 107417 2330 ROOSEVELT DR, SAN ANTONIOGASOLINE, WASTE OIL 10/29/93 2 , 5 E,QTHE STANLEY WORKS 103485 2222 1/2 MALONE ST, SAN ANTONIOGASOLINE, DIESEL 3/30/92 2 , 6 E,Q* THOMAS TUTTLE107705 3009 BLANCO RD, SAN ANTONIOWASTE OIL 12/1/93 2 , 2A E,QTORRADO & ASSOCIATES 105118 212 NEWELL, SAN ANTONIOGASOLINE 10/21/92 2 , 6 E,Q* TORRADO CHRYSLER PLYMOUTH ASS107817 2800 BROADWAY, SAN ANTONIOGASOLINE 2/16/94 2 , 2A E,Q* TXDOT098852 2126 SE MILITARY DR, SAN ANTONIODIESEL 4/10/91 2 , 2A E,QTYRO OIL CO 093848 3155 SW MILITARY DR, SAN ANTONIODIESEL 10/12/89 2 , 2A E,QTYRO OIL CO 094496 3155 SW MILITARY DR, SAN ANTONIOGASOLINE 12/12/90 2 , 2A E,QU HAUL CO OF SAN ANTONIO 096542 7699 W HWY 90, SAN ANTONIOGASOLINE, WASTE OIL 8/9/90 2 , 4 E,QULTRAMAR DIAMOND SHAMROCK CORP 092872 15037 NACOGDOCHES RD, SAN ANTONIOGASOLINE 4/14/89 2 , 2A E,QUNION PACIFIC RAILROAD 096304 4701 N PAN AM EXPY, SAN ANTONIOGASOLINE, WASTE OIL 7/26/90 2 , 6 E,QUNION PACIFIC RR CO 101644 1711 QUINTANA RD, SAN ANTONIODIESEL 1/14/92 2 , 6 E,QUNION STOCK YARDS 095803 1667 S SAN MARCOS ST, SAN ANTONIOUNKNOWN 2/5/90 2 , 6 E,QUNITED SERVICES AUTO ASSOC. 100975 9800 FREDERICKSBURG RD, SAN ANTONIODIESEL 11/24/91 2 , 6 E,QUNKNOWN 091465 FREDERICKSBURG, SAN ANTONIOGASOLINE 1/16/87 5B , 6 E,QUNKNOWN 091795 GRAMERCY, SAN ANTONIOGASOLINE 1/20/88 5B , 6 E,QUNKNOWN 091862 9000 AIRPORT BLVD, SAN ANTONIOGASOLINE 7/23/87 2 , 5 E,QUNKNOWN 092117 E NORTH LOOP RD, SAN ANTONIOGASOLINE 8/16/88 2 , 2A E,QUNKNOWN 097771 NOGALITOS, SAN ANTONIOGASOLINE 1/17/91 5B , 1A E,QUNKNOWN 102183 3565-570 SW MILITARY DR, SAN ANTONIOUNKNOWN 12/6/91 2A , 1A E,QUNKNOWN 102813 705 E ELMIRA ST, SAN ANTONIOGASOLINE 3/1/91 2A , 1A E,QUNKNOWN 104572 901 S LAREDO, SAN ANTONIOUNKNOWN 9/3/92 2A , 6 E,QTNRCC - 12

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BEXARPSTWQDUNKNOWN 105818 CALLAGHAN, SAN ANTONIOGASOLINE 1/13/93 2A , 6 E,QUS AIR FORCE KELLY 091957 KELLY AFB, SAN ANTONIOJET FUEL 6/27/88 2 , 2A E,QUS AIR FORCE KELLY 102229 BLDG 654, SAN ANTONIOCHEMICAL, OTHER 6/26/89 2A , 6 E,QUS AIR FORCE KELLY 103528 BLDG 200, SAN ANTONIODIESEL 6/11/92 2A , 6 E,QUS AIR FORCE KELLY 107830 BLDG 956, SAN ANTONIODIESEL 1/27/94 2 , 5 E,QUS AIR FORCE LACKLAND 097229 BLDG 5005 BLDG 5005, SAN ANTONIOGASOLINE 11/5/90 2 , 2A E,QUS AIR FORCE LACKLAND 098855 BLDG 4895, SAN ANTONIODIESEL 4/16/91 2 , 5 E,QUS AIR FORCE LACKLAND 109856 BLDG 5023, SAN ANTONIOGASOLINE 7/11/95 2 , 5 E,QUS AIR FORCE LACKLAND 110220 BLDG 5008A, SAN ANTONIOWASTE OIL 3/2/95 2 , 6 E,QUS AIR FORCE LACKLAND 110288 BLDG 1525, SAN ANTONIOGASOLINE 8/12/94 2 , 2A E,QUS AIR FORCE RANDOLPH 091461 EXCHANGE SERVICE ST STATION, SAN ANTONIO GASOLINE 8/17/87 2 , 5 E,QUS AIR FORCE RANDOLPH 104626 TANK 20 & 21, SAN ANTONIOJET FUEL 9/1/92 2 , 4 E,QUS ARMY-FT. SAM HOUSTON 100943 BLDG 366, SAN ANTONIOGASOLINE 11/14/91 2 , 6 E,Q* UZZELL J ARNOLD097939 1803 GOLIAD RD, SAN ANTONIOGASOLINE, WASTE OIL 1/17/91 2 , 2A E,QVAN DELDEN CO. 099560 829 NOGALITOS, SAN ANTONIOGASOLINE 5/16/91 2A , 1A E,QVIA METROPOLITAN TRANSIT 091490 1720 N FLORES ST, SAN ANTONIODIESEL 10/2/87 2A , 6 E,QVIA METROPOLITAN TRANSIT 111374 800 W MYRTLE, SAN ANTONIOHYDR FLUID 6/24/96 2 , 2A E,QW & H INVESTMENTS 093290 51 ESSEX, SAN ANTONIOGASOLINE 7/10/89 2 , 4 E,Q* WAGNER FAMILY TRUST108754 601 DELAWARE, SAN ANTONIOGASOLINE 8/30/94 2A , 1A E,QWALSH E P 099170 900 NOGALITOS, SAN ANTONIOGASOLINE 5/24/91 5B , 1A E,QWARM SPRINGS REHABILITATION 101927 5101 MEDICAL DR, SAN ANTONIODIESEL 2/21/92 2 , 6 E,QWATKINS MOTOR LINES INC 108982 975 E SOUTHCROSS, SAN ANTONIOUNKNOWN 12/23/94 2A , 1A E,QWESTERN AUTO SUPPLY INC 098823 2337 NW MILITARY DR, SAN ANTONIOWASTE OIL 9/12/90 2 , 2A E,QWEYERHAEUSER COMPANY 092035 611 POP GUNN DR, SAN ANTONIOGASOLINE 7/20/88 2 , 2A E,QWILBERT OF SAN ANTONIO 094705 1319 MARCH RD, SAN ANTONIOGASOLINE 1/19/90 2 , 3 E,QWILLIAM G SHOWN 102014 W CROCKETT ST, SAN ANTONIOUNKNOWN 2/18/92 2 , 2A E,Q* WILLIAMS INSULATION INC107467 4902 NW INDUSTRIAL DR, SAN ANTONIOGASOLINE 10/4/93 2 , 2A E,QUSGS FREON PLUME STUDY 11 WELLS IN BEXAR COUNTY (68-27-515, 68-28-703, CCL3F (FREON) 6/3/76 1 , 2B Q,V,2,368-28-801, 68-28-911, 68-29-109, 68-29-702, 68-35-102,68-35-904, 68-36-102, 68-37-104, & 68-37-701)WEST AVENUE LANDFILL SAN ANTONIO, BEXAR COUNTY, "CASTLE HILLS" 7 ORGANIC COMPOUNDS, TCE 1/1/83 2D , 2B E,Q,V,1,21/2 MINUTE USGS TOPOGRAPHIC SHEETWUDCAMP STANLEY 0150117 WELL 16 (G0150117E) - N. END OF MOYER ROAD TRICHLOROETHENE, CIS & TRANS1,2-BICHLOROETHENE,TETRACHLOROETHENE8/9/91 2C , 5 E,Q,V,2BLANCOPSTBORDENPSTBOWIEENF/WSTUNKNOWN 105405 1100 S WINTERS FUR ST, JOHNSON CITYGASOLINE, DIESEL, WASTE OIL 10/30/92 1B , 1A E,QBORDEN COUNTY ISD 099466 FM 669, GAILGASOLINE 6/24/91 2A , 6 E,QTXDOT 103016 HWY 180, GAILGASOLINE 4/17/92 2 , 2A E,QUS ARMY - LONE STAR ARMY AMMUN. PLANT 30991 HWY 82 WEST OF TEXARKANATNT,NITRATES,S,METALS,ACIDS 2/1/92 3A , 2A EQVUS ARMY - RED RIVER DEPOT 67004 20 MILES WEST OF TEXARKANA ON I-30METALS, TCE, PCE, VINYL 2/26/88 3 , 2 QTNRCC - 13

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BOWIEENF/WSTIHWCHLORIDEKERR-MCGEE CHEMICAL CORP 31002 155 BUCHANAN, TEXARKANACREOSOTE 12/2/86 3A , 4,5 E,Q,V,2,3U.S ARMY, RED RIVER DEPOT 67004 RED RIVER ARMY DEPOT, ENVIRONMENTALTRACE METALS, TCE, PCE, VINYL 2/26/88 3A , 2A E,Q,2,3DIVISION, TEXARKANACHLORIDEMSWU.S. ARMY/RED RIVER DEPOT: LF-31A AND 32A MSW01313 TEXARKANA, TX.VOCs (1,1-DICHLOROETHANE, ANDCIS-1,2-DICHLOROETHENE)1/25/95 2A , 2B E,Q,V,2PCD/CAPCD/SUPPCD/VCPSTKERR-MCGEE CHEMICAL CORP 31002 155 BUCHANAN, TEXARKANACREOSOTE 12/2/86 3A , 5 E,Q,V,2,3LONESTAR ARMY AMMUNITIONS PLANT 30991 12 MILES WEST OF TEXARKANA ON HWY 82EXPLOSIVES, ORGANICS, METALS 2/1/92 3A , 4 E,Q,V,2,3RED RIVER ARMY DEPOT 67004 RED RIVER ARMY DEPOT, ENVIRONMENTALDIVISION, TEXARKANATRACE METALS, TCE, PCE, VINYLCHLORIDE2/26/88 3A , 2A E,Q,2,3KOPPERS COMPANY/KOPPERS TEXARKANASUPERFUND SITELONE STAR ARMY AMMUNITION PLANT NPLSUPERFND SITEWEST 3RD ST AND MILAM ST. TEXARKANA, TX.12 MILES WEST OF TEXARKANACREOSOTE CONSTITUENTS 7/29/87 5A , 3 E,Q,V,1MUNITION COMPOUNDS, HEAVYMETALSTEXARKANA WOOD PRESERVING 19890717001 ON LUBBOCK STREET, EAST SIDE OF RAILROAD CREOSOTE CONSTITUENTS 5B , 3 E,Q,V,2,3TRACKS IN SOUTH TEXARKANA TEXARKANA, TX.HUMCO HOLDING GROUP, INC. (LARGE TRACT) 363 1008 WHITAKER, TEXARKANACOAL TAR, METALS, BTEX, SVOCS 10/8/96 0 , 6 EHUMCO HOLDING GROUP, INC. (SMALL TRACT) 362 1008 WHITAKER, TEXARKANAVOCS, PESTICIDES, PCBS 10/8/96 0 , 2B EABBOTT MARTHA & AVARD STEVE 101744 2615 NEW BOSTON RD, TEXARKANAGASOLINE 2/5/92 2 , 2A E,QALUMAX MILL PRODUCTS 108425 300 ALUMAX DR, TEXARKANAKEROSENE 5/23/94 2A , 6 E,QAMERICAN AUTO LUBE 091269 2900 NEW BOSTON, TEXARKANAGASOLINE 3/1/87 2 , 4 E,QATCO DISTRIBUTING CO 094998 SPUR 74, VICTORY CITYGASOLINE 3/5/90 2 , 2A E,QATCO DISTRIBUTING CO 109809 700 PLUM ST, TEXARKANAWASTE OIL 8/28/95 2 , 6 E,QATKINSON PETROLEUM 104264 HWY 82, HOOKSGASOLINE 7/30/92 2 , 2A E,QBROWER JIM JR 094560 5600 SUMMERHILL RD, TEXARKANAGASOLINE 1/11/90 2A , 1A E,QBRUCE KENNEDY SAND & GRAVEL 097588 2515 W 7TH, TEXARKANAGASOLINE, DIESEL 12/13/90 2A , 6 E,QBUNCH WHOLESALE INC 102236 221 S KING'S HWY, TEXARKANAGASOLINE 3/12/92 2 , 5 E,QCALVIN CARTER CONSTRUCTION 103578 2324 W 7TH, TEXARKANAGASOLINE 6/19/91 2 , 6 E,QCARROL ROBINSON 099179 1701 W 7TH ST, TEXARKANAGASOLINE 5/16/91 2A , 2A E,QCIRCLE K CORP 092681 1625 7TH ST, TEXARKANAGASOLINE 9/16/88 2A , 6 E,QCIRCLE K CORP 094618 2314 NEW BOSTON RD, TEXARKANAGASOLINE 2/2/90 2 , 2A E,QCITY OF TEXARKANA 100009 4TH & MAIN, SE CORNER ST, TEXARKANAGASOLINE 4/10/91 2 , 2A E,Q* CITY OF TEXARKANA112477 1808 OAK ST, TEXARKANAGASOLINE 8/4/97 1B , 1A E,QCOLLUM PAUL 104547 4023 N STATE LINE, TEXARKANAGASOLINE, DIESEL, WASTE OIL 9/8/92 5B , 2A E,QCOMMERCIAL NATIONAL BANK 098795 701 SPRUCE, TEXARKANAGASOLINE, DIESEL 5/1/91 2 , 6 E,QCOUNTRY STORES 109618 HWY 67, REDWATERGASOLINE 4/26/95 2 , 2A E,QCYBERSPACE NETWORK INC 110198 2601 S LAKE DR, TEXARKANAWASTE OIL, GASOLINE 12/21/95 1B , 1A E,QDARR EQUIPMENT COMPANY 104599 145 E BAILEY, NASHGASOLINE, DIESEL, WASTE OIL 9/2/92 2A , 1A E,QDAY & NITE CONVENIENCE 108620 HWY 67, MAUDGASOLINE 1/25/93 2 , 2A E,QDONALD SMITH 096254 321 4TH ST, TEXARKANAGASOLINE 7/24/90 2 , 2A E,QEXXON COMPANY USA 094324 IH-30, HOOKSGASOLINE 8/9/89 2 , 6 E,Q5A , 2AE,Q,V,2,3TNRCC - 14

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BOWIEPSTBRAZORIAENF/WSTIHWEXXON COMPANY USA 100831 2505 RICHMOND RD, TEXARKANAGASOLINE, DIESEL 10/25/91 2 , 2A E,QEXXON COMPANY USA 106603 5303 N STATE LINE AVE, TEXARKANAGASOLINE, HYDR FLUID 5/4/93 2 , 2A E,QFFP OPERATING PARTNERS 092767 4526 W 7TH ST, TEXARKANAUNKNOWN 3/14/89 2 , 2A E,QFFP OPERATING PARTNERS 105026 HWY 67, MAUDGASOLINE 10/17/92 2 , 2A E,QGARY JONES TRIPLE J OIL 097296 1001 NEW BOSTON RD, TEXARKANAGASOLINE, DIESEL 11/15/90 2 , 6 E,QGERALD HAIRE 101261 1720 SPRUCE ST, TEXARKANAGASOLINE 12/17/91 2 , 2A E,QJACK LILES 112002 104 W A AVE, HOOKSGASOLINE 11/13/96 2A , 1A E,QJERRY HARRELL, INC. 103998 2400 COLLEGE DR, TEXARKANAGASOLINE 7/27/92 2 , 2A E,QLOVES COUNTRY STORE 109956 IH-30, HOOKSGASOLINE 4/30/95 2 , 2A E,Q* M & S INVESTMENTS102964 501 E NORTH FRONT ST, NEW BOSTONGASOLINE 4/20/92 2 , 2A E,QMAPLE, ARNOLD 108693 2101 S LAKE DR, TEXARKANAGASOLINE 9/26/94 2A , 1A E,QMILLER BOWIE CO FARMERS ASSOC 100900 200 LELIA ST, TEXARKANAGASOLINE 10/21/91 2 , 6 E,QMORRISS MARTHA 099393 2222 NEW BOSTON RD, TEXARKANAGASOLINE 6/28/91 2 , 2A E,Q* MOSELY OIL CO112961 HWY 67, MAUDGASOLINE, DIESEL 6/16/97 1B , 1A E,QMOSLEY OIL COMPANY 093420 HWY 82, HOOKSGASOLINE 7/21/89 2 , 2A E,QNORMA CRAWFORD ESTATE EXEC 111115 W HWY 82, MALTAGASOLINE 4/16/96 2 , 2A E,QPRIMM EXXON (BOWIE COUNTY) 098310 2401 COLLEGE DR, TEXARKANAGASOLINE 2/12/91 2 , 6 E,QRAFFAELLI STEVE 103577 WALNUT, TEXARKANAGASOLINE 6/24/92 5B , 6 E,Q* ROAD WAY FOOD MART INC111141 602 N KINGS HWY, NASHUNKNOWN 8/12/96 2 , 2A E,QSHUTE HIRAM 099435 102 HWY 82, NEW BOSTONGASOLINE 7/2/91 2 , 2A E,QSOUTHERN PACIFIC LINES 105869 901 PHENIE AVE, TEXARKANADIESEL 1/13/93 2 , 6 E,QSTAR ENTERPRISE 107780 IH--30, TEXARKANAGASOLINE, OTHER 1/17/94 2 , 6 E,QTEX-ARK PROPERTIES 103637 315 TEXAS BLVD, TEXARKANAGASOLINE 5/25/92 2A , 6 E,QTEXAS DEPT OF PUBLIC SAFETY 104935 1516 HAMPTON, TEXARKANAGASOLINE 10/6/92 1B , 1A E,QTOTAL PETROLEUM INC 111292 4020 S LAKE ST, TEXARKANAGASOLINE 7/1/96 2 , 2A E,Q* TOTAL PETROLEUM INC111670 5023 STATE LINE AVE, TEXARKANAGASOLINE 9/24/96 2 , 3 E,QTOTAL PETROLEUM, INC. 110956 FM 560, HOOKSGASOLINE 1/16/96 2 , 2A E,QTRUMAN ARNOLD COMPANIES 093073 1801 NEW BOSTON RD, TEXARKANAGASOLINE 5/24/89 2 , 4 E,QTRUMAN ARNOLD COMPANIES 094005 INTSTATE 30 & HWY 8, NEW BOSTONGASOLINE 8/25/89 2 , 2A E,QTRUMAN ARNOLD COMPANIES 094209 2305 RICHMOND RD, TEXARKANAGASOLINE 5/24/89 2 , 4 E,QUNKNOWN 098849 1707 W 6TH ST, TEXARKANAGASOLINE 5/8/91 5B , 1A E,QUS ARMY-LONE STAR AMMO PLANT 091312 G-38 BULK STORAGE FCLTY, TEXARKANADIESEL 5/13/87 2 , 2A E,QUS ARMY-LONE STAR AMMO PLANT 092366 OLD GASOLINE STATION, TEXARKANADIESEL 11/23/88 2 , 2A E,QUS POSTAL SERVICE 094906 2211 N ROBINSON RD, TEXARKANAWASTE OIL 2/13/90 2A , 6 E,QWREN OIL CO 096644 5704 W 7TH ST, TEXARKANADIESEL 9/1/90 2 , 2A E,QALLWASTE RAIL CLEANING, INC. 30207 OLD CLUTE ROAD, ANGLETONHC,NAPHTHALENE,BTEX 6/30/89 1B , 1B EDOW CHEMICAL USA 30106 2301 N. BRAZOSPORT BLVD, FREEPORTCHLORINATED HYDROCARBONS, 4/24/89 3A , 5 EQV23ARSENICNALCO CHEM. CO. - FREEPORT 30707 COUNTY ROAD 229, FREEPORTLEAD SOLVENTS, CHLORIDES 1/1/87 2A , 3 EQV@PHILLIPS PETROLEUM - SWEENY 30048 OLD OCEAN, SWEENYORGANICS 4/19/94 3B ,EQVAMOCO CHEMICAL CO. - ALVIN 30042 CHOC. BAYOU & FM 2004, ALVINCHROMIUM 11/28/89 3A , 5 E,Q,V,2,3BASF 30024 602 COOPER AVE, FREEPORTBENZENE, PHENOL 5/20/94 3A , 2A E,QDOW CHEMICAL USA 30106 2301 N. BRAZOSPORT BLVD, FREEPORTVOLATILE ORGANICS, DNAPL'S,TARS4/24/89 3A,3C , 3,4,5 E,Q,V,2PHILLIPS PETROL. - SWEENY 30048 OLD OCEANHYDROCARBONS, TPH 6/20/89 3A,3B , 3,4,5 E,Q,V,2TNRCC - 15

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BRAZORIAIHWSOLUTIA (FORMERLY MONSANTO-CHOC BAYOU) 30138 11 MILES SOUTH OF ALVIN ON FM 2917AR, CN, PHENOLS,ACRYLONITRILE12/5/89 2B,3A , 4,5 E,Q,V,2,3PCD/CAPCD/SUPPCD/VCPSTAMOCO CHEMICAL CO. - ALVIN 30042 CHOC. BAYOU & FM 2004, ALVINCHROMIUM 11/28/89 0,3A , 1A,1B E,Q,V,1AT & SANTA FE, MANVEL 32350 7714 MASTERS ST., MANVELCREOSOTE 3/16/93 2 , 5 EBASF 30024 602 COOPER AVENUE, FREEPORTBENZENE, PHENOL,FORMALDEHYDE5/20/94 3A , 2 E,QDOW CHEMICAL USA 30106 2301 N. BRAZOSPORT BLVD, FREEPORTVOLATILE ORGANICS, DNAPL'S,TARS* GULF CHEMICAL & METALLURGICAL30952 302 MIDWAY ROAD, FREEPORTBTEX, ARSENIC, CADMIUM,CHROMIUM, COBOLT, NICKLE,MOLIBDINUM, VANADIUM4/24/89 3A , 5 E,Q6/28/94 3A , 2 EMONSANTO - CHOC. BAYOU 30138 11 MILES SOUTH OF ALVIN ON FM 2917AR, CN, PHENOLS,12/5/89 2B,3A , 1A,1B E,QACRYLONITRILEPHILLIPS PETROL. - SWEENY 30048 OLD OCEANHYDROCARBONS, TPH 6/20/89 3AB , 2,3 E,Q,V,2FISH ENGINEERING AND CONSTRUCTION 980626121 NORTH SIDE OF MARLINE AVE., 1 MILE EAST OF PESTICIDES 1B , 1A EHWY. 332, FREEPORTOXYCHEM CHOCOLATE BAYOU PUMPING STATIONBENZENE 2B , 1 EFORMER ALCOA RECYCLING FACILITY 388 2134 MORRIS AVENUE, SH 6, MANVELMETALS 10/31/96 0 , 2B E518 SERVICE STATION INC 093682 6075 W BROADWAY, PEARLANDGASOLINE 8/9/89 2 , 2A E,QBADGE ESTATE 097910 201 N BROOKS, BRAZORIAGASOLINE 1/19/91 2 , 2A E,Q* BAY OIL CO112069 211 E HWY 6, ALVINGASOLINE 12/20/96 2 , 2A E,Q* BUC-EE'S NO 4104715 302 THIS WAY, LAKE JACKSONGASOLINE 5/6/92 2 , 2A E,Q* BUCCEES INC112104 4231 E HWY 332, FREEPORTGASOLINE 1/30/97 2 , 6 E,Q* BUCCEES INC112192 302 S 17TH ST, WEST COLUMBIAGASOLINE 3/11/97 2 , 2A E,Q* BUCEES INC112016 800 N HWY 36, BRAZORIAGASOLINE 12/5/96 2 , 2A E,Q* BUCEES INC112017 101 S HWY 2004, LAKE JACKSONGASOLINE 11/22/96 2 , 2A E,Q* BUCEES INC112018 899 OYSTER CREEK DR, LAKE JACKSONGASOLINE 12/3/96 2 , 2A E,Q* BUCEES INC112068 1101 S BROOKS, BRAZORIAGASOLINE 1/2/97 2 , 2A E,Q* BUCEES INC112095 2001 N HWY 36, BRAZORIAGASOLINE 12/31/96 2 , 2A E,Q* BUCEES INC112096 105 E BRAZOS, WEST COLUMBIAGASOLINE 1/16/97 2 , 2A E,Q* BUCEES INC112180 461 PLANTATION DR, CLUTEGASOLINE 12/16/96 2 , 2A E,Q* CARROLL MOTOR CO110336 213 S COLUMBIA, WEST COLUMBIAHYDR FLUID 1/8/96 2 , 2A E,QCHARTER FOOD STORE CIRCLE K 107240 932 PLANTATION, CLUTEGASOLINE 9/15/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094155 2121 N MAIN, PEARLANDGASOLINE 12/5/89 2 , 2A E,QCHEVRON USA INC 094154 11422 SOUTHWEST FWY, HOUSTONGASOLINE 12/5/89 2A , 6 E,QCHEVRON USA INC 097216 95 OAK DR, LAKE JACKSONGASOLINE 6/25/90 2 , 2A E,Q* CHEVRON USA INC099641 95 OAK DR, LAKE JACKSONDIESEL 7/10/91 2 , 2A E,Q* CITY OF ALVIN110332 107 W SEALY, ALVINUNKNOWN 1/1/96 2 , 2A E,QCLEAN PROPERTIES INC 101226 6335 S HWY 36, JONES CREEKGASOLINE, WASTE OIL 11/2/91 2 , 2A E,QCOASTAL MAVERICK 091762 2112 E BROADWAY, PEARLANDGASOLINE 3/16/88 2 , 2A E,QCOASTAL MAVERICK 093611 5304 FM 518, PEARLANDDIESEL 9/5/89 2 , 2A E,QCURRENT OCCUPANT 095223 1324 E MULBERRY, ANGLETONGASOLINE 1/29/90 2 , 2A E,Q* DEAN KERSH112301 95 OAK DR, LAKE JACKSONUNKNOWN 5/7/97 2 , 2A E,QDENTON JOE 101799 118 THAT WAY, LAKE JACKSONGASOLINE 12/31/91 2 , 2A E,QTNRCC - 16

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BRAZORIAPSTBRAZOSENF/WSTDIAMOND SHAMROCK 092050 HWY 288, RICHWOODGASOLINE 1/21/88 2 , 2A E,Q* DIAMOND SHAMROCK108370 1200 W SEALY, ALVINGASOLINE 7/13/94 2 , 2A E,Q* DIAMOND SHAMROCK109695 2301 E MULBERRY, ANGLETONGASOLINE 6/29/95 2 , 2A E,Q* DIAMOND SHAMROCK110118 528 S ANDERSON, ANGLETONGASOLINE 11/21/95 2 , 2A E,QDIAMOND SHAMROCK 111686 2104 MAIN ST, PEARLANDGASOLINE 7/31/96 2 , 6 E,Q* DIAMOND SHAMROCK INC.106696 3502 E BROADWAY, PEARLANDGASOLINE 5/5/93 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 091434 612 W PLANTATION, CLUTEGASOLINE 8/21/87 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 091454 1235 E MULBERRY, ANGLETONGASOLINE 9/11/87 2 , 4 E,QDIAMOND SHAMROCK REFIN. & MKTG 103363 728 W MULBERRY, ANGLETONGASOLINE 5/12/92 2A , 2A E,Q* EFSAJ, INC.111347 19310 HWY 6, MANVELGASOLINE 1/23/97 2 , 2A E,QEVANS OIL CO 102812 324 MAIN ST, SWEENYGASOLINE 12/13/91 2 , 2A E,QEVANS OIL CO. 099238 1219 BRAZOSPORT BLVD, FREEPORTDIESEL 12/6/90 2 , 2A E,QEXXON COMPANY USA 098967 311 S GORDON ST, ALVINGASOLINE 1/23/91 2 , 2A E,QEXXON COMPANY USA 110936 1920 E HWY 6, ALVINGASOLINE 4/11/96 2 , 2A E,QFDIC 095711 TAYLOR, ALVINGASOLINE 5/21/90 2 , 5 E,QFIRST COMMERCE BANK 105141 101 PLANTATION, LAKE JACKSONGASOLINE, DIESEL, WASTE OIL 10/7/92 2 , 3 E,QFIRST INTERSTATE BANK 096456 1727 HWY 227, ANGLETONUNKNOWN 7/15/90 2 , 6 E,Q* FIRST NATIONAL BANK OF BELLVIL106574 1902 BRAZOSPORT, FREEPORTGASOLINE, WASTE OIL 4/22/93 2 , 2A E,QGEORGE BROWN 101739 CTY RD 30, HOLIDAY LAKESGASOLINE 1/24/92 2A , 6 E,QJEN OIL INC 095222 2902 HWY 523, OYSTER CREEKGASOLINE 2/23/90 2 , 2A E,QJOE DENTON 101803 923 N GULF BLVD, FREEPORTGASOLINE 12/31/91 2 , 6 E,QKINCER INC 100395 22602 N HWY 288, ANGLETONGASOLINE 7/27/91 2 , 2A E,QLEE KNIGHT 095065 714 S GORDON ST, ALVINGASOLINE 2/5/90 2 , 2A E,QLEE OIL COMPANY INC 096453 HWY 35, ALVINUNKNOWN 7/19/90 2 , 2A E,QLONG LUCILLE ESTATE 092382 807 MAINE ST, SWEENYGASOLINE 11/15/88 2 , 4 E,QLUG-A-JUG 098660 4408 W BROADWAY, PEARLANDGASOLINE 3/22/91 2 , 2A E,QMAGNESS CO INC 096065 227 S FRONT ST, ANGLETONGASOLINE, DIESEL 7/5/90 5B , 2A E,QMRS BAIRD'S PROPERTIES 093517 E HWY 35, ANGLETONGASOLINE 8/11/89 2A , 6 E,QNGUYEN, ANH THI 097909 5304 W BROADWAY, PEARLANDGASOLINE 11/28/90 2 , 2A E,QNORWEST BANK, ANGLETON 095143 803 N VELASCO, ANGLETONGASOLINE 2/22/90 2 , 4 E,QPHIL BEUTEL 106071 1111 S VELASCO, ANGLETONUNKNOWN 11/15/92 2 , 2A E,QPHILLIPS 66 CO 111087 801 S 17TH ST, WEST COLUMBIAGASOLINE, DIESEL 5/8/96 2 , 2A E,QPIERCE W H JR ESTATE 099910 300 E 2ND ST, FREEPORTDIESEL 2/7/91 2 , 2A E,QROBERT STEWART 094802 101 S VELASCO, ANGLETONGASOLINE 1/12/90 2 , 2A E,Q* SANBRILINA INC111836 3515 MUSTANG RD, ALVINGASOLINE 12/6/96 2 , 2A E,Q* SPEEDY STOP FOOD STORES111090 627 OYSTER CREEK DR, LAKE JACKSONGASOLINE, WASTE OIL 5/15/96 2 , 2A E,QTEXACO REFINING & MARKETING 094930 1014 BRAZOSPORT, FREEPORTGASOLINE 1/30/90 2A , 6 E,QTEXAS DEPT CRIMINAL JUSTICE 104477 HWY 36, BRAZORIA COUNTYGASOLINE 5/6/92 2 , 3 E,QTEXAS DEPT CRIMINAL JUSTICE 104478 WALKER ST, BRAZORIA COUNTYGASOLINE 5/6/92 2 , 3 E,QTEXAS DEPT OF PUBLIC SAFETY 096494 501 S VELASCO, ANGLETONGASOLINE 8/14/90 2 , 2A E,QTEXAS-NEW MEXICO POWER CO 097119 300 CREWSWAY, WEST COLUMBIAGASOLINE, DIESEL 9/13/90 2 , 2A E,QWEATHERFORD ENTERRA 093855 3236 MAIN ST, PEARLANDDIESEL 10/6/89 2 , 6 E,Q* WESTERN ATLAS INTERNATIONAL106105 3358 E HWY 6, ALVINGASOLINE 1/18/93 2 , 2A E,QWESTERN GEOPHYSICAL 101870 10001 E LOOP 35, ALVINDIST F OIL 2/10/92 2 , 6 E,QATOCHEM NORTH AMERICA (PENNWALT) 31695 201 W. DODGE STREET, BRYANARSENIC, PESTICIDES 1/1/69 3B , 4 EQV23TNRCC - 17

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BRAZOSPCD/VCPSTBREWSTERPSTBRISCOEPSTBROOKSPSTBROWNPCD/CA* CITGO PETROLEUM CORPORATION643 1714 FINFEATHER ROAD, BRYANHYDROCARBONS 10/24/97 0 , 4 EBROACH STATIONS INC 098523 1615 N TEXAS AVE, BRYANGASOLINE 3/29/91 2 , 2A E,QCIRCLE K CORP 098924 1401 N TEXAS AVE, BRYANUNKNOWN 5/14/91 2 , 2A E,QCIRCLE K CORP 101632 1201 W WILLIAM J BRYAN, BRYANGASOLINE 1/20/92 2 , 2A E,Q* CIRCLE K STORES109732 300 E VILLA MARIA, COLLEGE STATIONGASOLINE 7/26/95 2 , 2A E,Q* CITY OF BRYAN096674 1111 WACO ST, BRYANGASOLINE 8/27/90 2 , 4 E,QCITY OF BRYAN 108270 300 S TEXAS AVE, BRYANGASOLINE 5/4/94 2 , 2A E,Q* CITY OF BRYAN110454 DODGE ST, BRYANUNKNOWN 3/4/96 2 , 2A E,QDABBS OIL CO 104319 901 S TEXAS AVE, COLLEGE STATIONWASTE OIL 8/20/92 2 , 2A E,Q* DAVID RESTMEYER110592 600 N BRYAN, BRYANUNKNOWN 3/20/96 2 , 2A E,QE Z MART STORES INC 097455 3330 E 29TH, BRYANGASOLINE 12/7/90 2 , 2A E,QE Z MART STORES INC 097457 3201 S COLLEGE, BRYANGASOLINE 12/7/90 2 , 2A E,QE Z MART STORES INC 103375 301 UNIVERSITY DR, COLLEGE STATIONGASOLINE 6/8/92 2 , 2A E,QEXXON COMPANY USA 091065 1721 TEXAS AVE, COLLEGE STATIONGASOLINE 3/3/86 2 , 2A E,QEXXON COMPANY USA 091067 HWY 6, COLLEGE STATIONUNKNOWN 4/22/86 2 , 2A E,QEXXON COMPANY USA 105814 2401 E 29TH ST, BRYANGASOLINE 1/13/93 2 , 3 E,QFORD LEASING DEVELOPMENT CO. 110931 1309 S TEXAS AVE, BRYANHYDR FLUID 5/16/96 2 , 6 E,Q* J J RUFFINO104727 1219 N TEXAS, BRYANGASOLINE 10/1/92 2 , 5 E,Q* U HAUL CO112735 519 S TEXAS AVE, COLLEGE STATIONGASOLINE 10/21/97 1B , 1A E,QUNKNOWN 109464 TEXAS, COLLEGE STATIONGASOLINE 5/21/94 1B , 1A E,QTXDOT 092737 FM 170, TERLINGUAGASOLINE 11/1/89 2 , 2A E,QBURSON TRUST 094375 518 MAIN ST, SILVERTONGASOLINE 11/28/89 2 , 2A E,QKING FISHER MARINE INC 107922 HWY 316, PORT LAVACAGASOLINE 1/28/94 2A , 1A E,QBILL E TALLEY 109935 800 N MARY, FALFURRIASGASOLINE 4/21/94 2 , 2A E,QDENTON PETROLEUM CO 097013 400 ST MARYS ST, FALFURRIASGASOLINE 10/18/90 2 , 2A E,QDICKEY FORD MERCURY INC 101352 329 N ST MARY, FALFURRIASGASOLINE 1/2/92 5B , 2A E,QE Z SERVE CONVENIENCE STORES 111674 900 E RICE, FALFURRIASGASOLINE 9/6/96 2 , 2A E,QGARCIA NELLIE 104785 801 S ST MARY, FALFURRIASGASOLINE 10/1/92 2 , 2A E,QGATES ENTERPRISES 095312 500 S ST MARYS, FALFURRIASGASOLINE 3/27/90 2 , 2A E,QGATES OIL CO INC 111549 500 N ST MARY ST, FALFURRIASGASOLINE 6/14/96 2 , 2A E,QGOLDSTAR PETROLEUM INC 098004 514 W RICE, FALFURRIASGASOLINE 2/11/91 5B , 1A E,QHORACIO VILLARREAL 102781 701 ST MARYS, FALFURRIASGASOLINE 4/27/92 2A , 2A E,Q* J & E OIL INC112600 1200 N ST MARYS ST, FALFURRIASGASOLINE 9/4/97 1B , 1A E,QSMITH ROBERT 098846 1204 S ST. MARYS, FALFURRIASGASOLINE 4/5/91 2 , 2A E,Q* VALLEY SHAMROCK INC112576 300 S ST MARYS, FALFURRIASGASOLINE 8/28/97 1B , 1A E,Q3-M COMPANY 30536 BROWNWOODORGANICS, CHROMIUM, NICKEL 3/1/90 0, 2D , 2A E,Q,V,2TNRCC - 18

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236BROWNPCD/ENFPSTBURLESONIHWPCD/CAPSTBURNETPSTWUDCALDWELLPSTSUPERIOR CABLE CORP 31532 MORRIS SHEPARD DRIVE, BROWNWOODPCE,TCE,DCE,TCA,DCA 5/1/91 2A , 2A EBROWN CO WID #1 102663 BELLE PLAIN, BROWNWOODGASOLINE 2/13/92 2 , 2A E,QCHAPPELL INC 109652 528 W COMMERCE, BROWNWOODGASOLINE, DIESEL 6/28/95 2A , 6 E,QCIRCLE K CORP 097685 513 E COMMERCE, BROWNWOODGASOLINE 12/21/90 2 , 2A E,QCITY OF BROWNWOOD 095291 500 W COMMERCE, BROWNWOODGASOLINE 11/15/89 2A , 6 E,QFDIC 096166 415 EARLY BLVD, EARLYWASTE OIL 7/12/90 2 , 2A E,QKOHLER COMPANY 091210 S HWY 377, BROWNWOODOTHER 1/21/87 2 , 2A E,QMCDANIEL PAMELA & MELINDA H 096151 210 E COMMERCE, BROWNWOODGASOLINE, DIESEL 6/22/90 2 , 2A E,QMERCHANTS FAST MOTOR LINES 097570 901 RIVERSIDE, BROWNWOODGASOLINE, DIESEL 11/26/90 2 , 6 E,QPF & E OIL COMPANY 096409 HWY 84, ZEPHYRGASOLINE, DIESEL 7/5/90 2 , 4 E,QSKINNYS INC 111031 206 W AUSTIN, BROWNWOODGASOLINE 5/19/96 2 , 2A E,QTEXAS BANK 104913 1519 AUSTIN AVE, BROWNWOODGASOLINE 8/12/92 2 , 5 E,QTHE REEDY COMPANY 092748 814 AUSTIN, BROWNWOODGASOLINE 12/20/88 2 , 2A E,QTU ELECTRIC 099918 912 SHARP, BROWNWOODDIESEL 1/26/90 2 , 2A E,QTXDOT 099701 N HWY 183, BROWNWOODGASOLINE, DIESEL 7/2/91 2 , 2A E,QUNKNOWN 102832 WILLOW ST, BROWNWOODGASOLINE 4/14/92 5B , 1A E,Q* VIOLET WELLS110588 600 MAIN, BROWNWOODUNKNOWN 3/20/96 2 , 2A E,QVULCAN MATERIALS COMPANY 092481 BROWNWOOD SITE, BROWNWOODGASOLINE 12/21/88 2 , 4 E,QWOODSON INC 100566 HWY 183, BROWNWOODGASOLINE 9/18/91 5B , 1A E,QKOPPERS (FORMERLY ATSF) 30065 SOMERVILLECREOSOTE, PENTA 11/5/87 3A , 4,5 E,Q,V,2KOOPER'S BN SF - SOMMERVILLE 30065 SOMERVILLECREOSOTE, PENTA, ARSENIC 11/5/87 3A , 4 E,Q,V,2* CIRCLE K CORP110905 HWY 36, SOMERVILLEGASOLINE 4/12/96 2 , 2A E,QJAMES R BATES 111449 800 BLK AVE B, SOMERVILLEUNKNOWN 8/13/96 2A , 1A E,Q* B & L GAS INC112470 108 S WATER, BURNETGASOLINE 7/15/97 2 , 2A E,QBUCKNER BOYS RANCH 095263 RR 2342, BURNETGASOLINE 3/27/90 2 , 4 E,QCAMM LARY 092078 309 N WATER ST, BURNETGASOLINE 4/15/87 2 , 2A E,QDIRENZO ANGELO 105086 2202 W HWY 281, MARBLE FALLSGASOLINE 10/22/92 2A , 1A E,QHILLSIDE GROCERY 095825 1000 S HWY 281, MARBLE FALLSGASOLINE 5/24/90 5B , 1A E,QJ M HUBER CORP 095777 90 AVE N, MARBLE FALLSGASOLINE 4/25/90 2 , 6 E,Q* KEN WARDEN108016 100 N WATER ST, BURNETGASOLINE 4/4/94 2 , 2A E,QSMITH BILL C OIL CO 104661 3RD ST, MARBLE FALLSGASOLINE 9/14/92 2 , 2A E,Q* NORTHRIDGE COMM. IND. SITES0270091 WELL 1(G0270091)-1-W OF US2811,1 DICHLOROETHYLENE 7/10/96 2C , 5 E,Q,V,2ALEXANDER OIL CO 099006 RAILROAD, MAXWELLGASOLINE, DIESEL 4/29/91 1B , 1A E,QCHEVRON PRODUCTS COMPANY 092486 1403 E CUMMINGS, LULINGGASOLINE 12/5/88 2 , 2A E,QCIRCLE K CORP 105536 622 MAGNOLIA, LULINGGASOLINE 12/3/92 2 , 2A E,QTNRCC - 19

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236CALDWELLPSTCALHOUNENF/WSTDOW CHEMICAL 092771 101 MIMOSA, LULINGGASOLINE 2/2/89 2 , 4 E,QJ P JONES OIL CO INC 093699 112 S COLORADO ST, LOCKHARTGASOLINE 7/21/89 2A , 2A E,QLOCKHART OIL CO 100974 303 S MAIN ST, LOCKHARTGASOLINE, DIESEL 11/23/91 2A , 6 E,QUNKNOWN 093137 N BRAZOS&SAN ANTONIO S, LOCKHARTGASOLINE 6/12/89 2A , 1A E,QUS DEPT LABOR ETA 108133 HWY 21, SAN MARCOSGASOLINE, DIESEL 5/10/94 2 , 2A E,QYANEZ VICTOR 103189 RT 1, MAXWELLGASOLINE 4/3/92 2A , 1A E,QBP CHEMICAL - GREEN LAKE PLANT 32164 HWY 185,16 MI WEST OF PORT LAVACACYANIDE 9/1/89 2 , 6 EQFORMOSA PLASTICS CORP. 31945 NORTH OF SH 38 AND FM 1593 IN POINT COMFORT EHTYLENE DICHLORIDE 12/8/89 4A , 2A EQV23UNION CARBIDE CORPORATION 30129 SEADRIFT PLANT, SEADRIFTORGANICS,CHLORINATEDSOLVENTS3/28/88 3B , 5 EQIHWUNION CARBIDE - SEADRIFT 30129 2 MILES SOUTH OF SH35 & 185 CP50190ORGANICS, CHLORINATEDSOLVENTS3/28/88 3A,3B , 4,5 E,Q,V,2,3PCD/CAPCD/ENFPCD/SUPPSTFORMOSA PLASTICS CORP. 31945 NORTH OF SH 38 AND FM 1593 IN POINT COMFORT ETHYLENE DICHLORIDE 12/8/89 3D , 6C E,Q,V,2UNION CARBIDE - SEADRIFT 30129 2 MILES SOUTH OF SH35 & 185 CP50190ORGANICS, CHLORINATED3/28/88 3A , 4,5 E,Q,V,2,3SOLVENTSALCOA ALUMINA & CHEMICALS,LLC-LAVACA BAY 30035 STATE HIGHWAY 35 AT POINT COMFORTMERCURY 5/13/89 2A , 1A EQV2 YALCOA (PT. COMFORT)/LAVACA BAYSUPERFUND SITESTATE HWY 35, POINT COMFORTMERCURY 1/31/94 3B , 2A E,Q,V,1,2,3* AMEROIL CORP112532 HWY 185, SEADRIFTGASOLINE 8/4/97 1B , 1A E,QBAROID CORP 097248 MAPLE ST, PORT OCONNORGASOLINE 11/5/90 2 , 2A E,Q* C L THOMAS PETROLEUM111790 1800 S HWY 35, PORT LAVACAGASOLINE 10/16/96 2 , 2A E,QCHARLES FISHER 105106 FM 2433, PORT LAVACADIESEL 7/17/91 2A , 6 E,QCOASTAL MAVERICK 109549 630 N VIRGINIA, PORT LAVACAGASOLINE 3/18/95 2A , 1A E,QCOASTAL MAVERICK 110901 312 E TRAVIS, PORT LAVACAGASOLINE 4/9/96 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO092210 1104 N VIRGINIA, PORT LAVACAGASOLINE 5/18/88 2 , 2A E,Q* DIEBEL OIL CO INC110775 707 W MAIN ST, PORT LAVACAUNKNOWN 4/5/96 2 , 2A E,QEXXON COMPANY USA 099505 1208 N VIRGINIA ST, PORT LAVACAUNKNOWN 3/28/90 2 , 4 E,QFDIC 097145 14TH ST, PORT OCONNORGASOLINE 9/17/90 2A , 2A E,QFDIC 099603 14TH ST, PORT OCONNORGASOLINE 12/6/90 2A , 1A E,QFRYOU CHARLES & JOY 101648 HWY 185, PORT OCONNORUNKNOWN 1/23/92 5B , 2A E,QLEO ANGER INC 093583 1916 W AUSTIN ST, PORT LAVACAGASOLINE 8/30/89 2 , 2A E,QMARK DANIEL 111861 HWY 185, SEADRIFTGASOLINE, WASTE OIL 8/9/96 1B , 1A E,Q* MAURITZ & COUEY111423 1108 BROADWAY, PORT LAVACAUNKNOWN 8/6/96 2 , 2A E,Q* MOTORBOAT & OFFSHORE FUEL INC112304 HWY 185, PORT OCONNORUNKNOWN 5/14/97 2 , 2A E,Q* MR B INC (SUB NEW DISTRIBUTING111581 HWY 185, SEADRIFTGASOLINE 7/16/96 2 , 2A E,QRAK DEVELOPMENT CORP 101012 102 AUSTIN, PORT LAVACAGASOLINE 11/26/91 2 , 2A E,Q* ROBERT WALLACE111813 S HWY 35, POINT COMFORTGASOLINE 10/22/96 2 , 2A E,Q* STANLEYS STORES INC112763 102 W MAIN, PORT LAVACAGASOLINE 9/12/97 2A , 1A E,QTRANSPORT INSURANCE CO 105807 707 W MAIN ST, PORT LAVACADIESEL 2/12/93 2 , 6 E,QTXDOT 108081 202 BROADWAY, SEADRIFTGASOLINE 3/30/94 2 , 2A E,QTNRCC - 20

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236CALHOUNPSTCALLAHANFODPSTCAMERONIHWPCD/CAPCD/ENFPCD/SUPPCD/VC* TXDOT108084 4TH, SEADRIFTGASOLINE 3/30/94 2 , 2A E,Q* WINDER JOHN D099883 132 N COMMERCE, PORT LAVACAGASOLINE 8/14/91 2 , 2A E,QBOURLAND GULF DIST. (ADDITIONAL PRP'S; SEEFILE)FINA SALES C/O JOE HARDWICK (HARDWICK OILCO.)LPST91138 NEAR THE CITY OF CLYDE APPROXIMATELY 15 BENZENE 5/30/86 2D , 2B E,Q,V,2,3MILES EAST OF ABILENE, TXLPST91138 NEAR CITY OF CLYDE APPROXIMATELY 15 MILES GASOLINE 3/28/85 2B , 4 E,Q,V,2,3EAST OF ABILENE, TXBILL BURNS OIL CO 111312 IH-20, CLYDEGASOLINE, DIESEL 6/20/96 2 , 2A E,Q* BOB LOYD L P GAS CO112349 IH 20, BAIRDGASOLINE 6/2/97 2 , 2A E,QCITY OF CLYDE 100542 S 1ST ST, CLYDEGASOLINE 5/6/91 2 , 4 E,QESE INC #24731 104734 HWY 279, CROSS PLAINSGASOLINE 8/19/92 5B , 1A E,QGERMANN WALTER D 097568 S FM 604, CLYDEGASOLINE, DIESEL 10/30/90 5B , 1A E,QJERRY & ALICE HOWLE 110929 105 S 1ST W, CLYDEGASOLINE 4/25/96 2 , 2A E,QKING HOERMANN OIL CO 101588 IH--20, BAIRDGASOLINE 6/24/91 5B , 1A E,QKING HOERMANN OIL CO-BANKRPTCY 091138 IH-20, CLYDEGASOLINE 6/23/84 5B , 4 E,QR A BAGWELL OIL CO 111372 108 BROADWAY, BALLINGERGASOLINE, DIESEL 6/28/96 2 , 2A E,QSAAB NAS SAR 091253 N CHERRY, CLYDEGASOLINE 3/8/87 2 , 6 E,QSKINNYS INC 106452 HWY 20, CLYDEGASOLINE 4/2/93 2 , 2A E,QWYLIE INC 096005 4TH, CROSS PLAINSDIESEL 6/4/90 2 , 2A E,QUNION CARBIDE- BROWNSVILLE 31108 STATE HYW 48 NW OF BROWNSVILLEPENTACHLOROPHENOL, 2,4-DIMETHYLPHENOL, ALCOHOLS,HEXANES, TOC, PH6/22/87 3A , 2A E,Q,BROWNSVILLE PUB WTP #1 82816 PO 3270, BROWNSVILLEFUEL OIL 10/20/90 0 , 2 EEXXON CO USA - PORT BROWNSVILLE 34072 PORT OF BROWNSVILLE, BROWNSVILLEDIESEL, GASOLINE 2/27/90 2A , 3 EQSTAR ENTERPRISE - BROWNSVILLE 35846 HWY 48 AND TERMINAL RD, BROWNSVILLETPH 7/29/92 1A , 1 EQUNION CARBIDE 31108 STATE HWY 48 NW OF BROWNSVILLEPENTACHLOROPHENOL, 2,4-DIMETHYLPHENOL, ALCOHOLS,HEXANES, TOC, PH6/22/87 0,3 , 6A E,Q,V,2VALLEY METAL RECYCLING 68127 FM 1595, HARLINGENMETALS, (CADMIUM, LEAD,MERCURY), PCBS, TPH4/6/93 0 , 1A EDIAMOND SHAMROCK TERMINAL HARLINGEN,TX 81316 4 1/2 EAST HWY 106, HARLINGENTPH,BTEX 1/16/89 2C , 3 EPHILLIPS PIPE LINE - RIO HONDO 31530 1/4 MILE NORTHEAST OF RIO HONDOTPH AND DIESEL 3/22/93 0 , 2 ENIAGARA CHEMICAL STATE SUPERFUND SITE 421 NORTH C STREET, HARLINGENARSENIC, PESTICIDES 10/14/88 5B , 3 E,Q,V,2,3STAR ENTERPRISE PETROLEUM FUELSST. HWY. 48 AND TERMINAL ROAD, BROWNSVILLE OIL, BTEX 5/21/93 2 , 1 EMARKETING* AMERADA HESS CORP., PORT ISABEL REFINERY 483 1.5 MILES SOUTH OF HWY 100 ON PORT ROAD, PORT BTEX, TPH 3/6/97 0 , 2 EISABELANGLO IRON AND METAL COMPANY -BROWNSVILLE197 HIGHWAY 48 & TURNING BASIN RD., BROWNSVILLE TPH, TOTAL METALS, PCB 3/7/96 0 , 2 EANGLO IRON AND METAL COMPANY - 318 2318 WEST STATE HIGHWAY 83, HARLINGENPCBS 8/14/96 1 , 2 ETNRCC - 21

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236CAMERONPCD/VCPST*HARLINGENFORMER VALLEY METALS RECYCLING FACILITY 390 HIGHWAY 106 1/2 MILE EAST OF FM 595, HARLINGEN VOCS, SVOCS, METALS 11/6/96 0 , 3 E* VALLEY SOLVENT COMPANY, INC.492 2 1/2 MILES WEST ON HIGHWAY 107, COMBES SOLVENTS 3/24/97 0 , 4 EA L BEAKEY JR 109750 905 PAREDES LINE RD, BROWNSVILLEGASOLINE 7/26/95 2 , 2A E,QBRIDGESTONE/FIRESTONE INC 101936 190 W STENGER, SAN BENITOGASOLINE 2/12/92 2A , 6 E,QBROWNSVILLE INTL AIRPORT 106135 700 S MINNESOTA, BROWNSVILLEGASOLINE, WASTE OIL 2/16/93 2 , 6 E,QBROWNSVILLE URBAN SYSTEM 108277 700 IOWA ST, BROWNSVILLEDIESEL 6/9/94 2A , 1A E,QBUCKOLTS RICK 097965 3014 SOUTHMOST RD, BROWNSVILLEGASOLINE 2/8/91 2A , 6 E,QCAMERON COUNTY COURTHOUSE 099111 3243 E 14TH ST, BROWNSVILLEGASOLINE, DIESEL 5/21/91 2 , 2A E,QCAMERON COUNTY COURTHOUSE 102190 MARINA RD, PORT ISABELGASOLINE 2/6/91 1B , 1A E,QCAMERON CTY IRRIGATION DIST #2 105828 356 W HEYWOOD, SAN BENITOGASOLINE 1/14/93 2 , 2A E,Q* CANTRELL OIL CO109502 1100 W COMBES, SAN BENITOGASOLINE 5/4/95 2 , 2A E,QCASTILLO JORGE 102648 497 W ELIZABETH, BROWNSVILLEGASOLINE 4/8/92 2 , 2A E,QCENTRAL POWER & LIGHT 092328 201 S T ST, HARLINGENGASOLINE 11/29/88 2 , 4 E,QCIRCLE K CORP 107161 929 S COMMERCE, HARLINGENGASOLINE 8/24/93 2 , 2A E,QCITGO PETROLEUM CORP 107531 11001 S PORT RD, BROWNSVILLEGASOLINE, DIESEL 11/29/93 2 , 2A E,QCITY OF BROWNSVILLE 097090 1455 RIDGEMOTT, BROWNSVILLEGASOLINE 10/29/90 2 , 6 E,QCITY OF BROWNSVILLE 101634 700 S MINNESOTA, BROWNSVILLEGASOLINE 1/24/92 2A , 6 E,QCITY OF BROWNSVILLE 106167 308 S ELIZABETH, BROWNSVILLEGASOLINE, WASTE OIL 2/18/93 2 , 6 E,QCITY STOP INC 111792 1204 MEXICO BLVD, BROWNSVILLEGASOLINE 10/14/96 1B , 6 E,QCOASTAL MARKETS 109612 5105 14TH ST, BROWNSVILLEGASOLINE 3/29/95 1B , 1A E,QCOASTAL MAVERICK 092144 2004 E 14TH ST, BROWNSVILLEUNKNOWN 9/12/88 2 , 2A E,QCOASTAL MAVERICK 093922 1021 S COMMERCE, HARLINGENGASOLINE 10/9/89 2 , 2A E,QCOASTAL MAVERICK 094794 825 PAREDES LINE RD, BROWNSVILLEGASOLINE 2/21/90 2 , 2A E,QCOASTAL MAVERICK 094959 5105 E 14TH, BROWNSVILLEGASOLINE 3/16/90 2 , 2A E,QCOASTAL MAVERICK 096900 1313 HAVERFORD PL, HARLINGENGASOLINE 10/4/90 2 , 4 E,QCOASTAL MAVERICK 097725 3305 INTERNATIONAL BLVD, BROWNSVILLEGASOLINE 1/11/91 2 , 2A E,QCOASTAL MAVERICK 098467 2744 E 13TH ST, BROWNSVILLEGASOLINE 4/4/91 2 , 2A E,QCOASTAL MAVERICK 098471 1560 77 SUNSHINE STRIP, HARLINGENGASOLINE 4/4/91 2 , 2A E,QCOASTAL MAVERICK 098473 2002 S 23RD ST, HARLINGENGASOLINE 4/4/91 2 , 2A E,QCOASTAL MAVERICK 098474 1178 S COMBES ST, SAN BENITOGASOLINE 4/4/91 2 , 5 E,QCOASTAL MAVERICK 099443 STUART PLACE RD, HARLINGENGASOLINE 7/10/91 2 , 5 E,QCOASTAL MAVERICK 099642 1500 CENTRAL BLVD, BROWNSVILLEGASOLINE 8/28/90 2 , 3 E,QCOASTAL MAVERICK 101994 1624 MORGAN BLVD, HARLINGENGASOLINE 1/31/92 2 , 2A E,QCOASTAL MAVERICK 103761 1674 N 77 SUNSHINE STRIP, HARLINGENGASOLINE 7/13/92 2 , 2A E,Q* COASTAL MAVERICK109434 705 S COMMERCE, HARLINGENGASOLINE 3/27/95 1B , 1A E,QCOASTAL MAVERICK 109436 104 N 7TH ST, RAYMONDVILLEGASOLINE 3/27/95 1B , 1A E,QCOASTAL MAVERICK 109439 101 CARMEN9 AVE, RANCHO VIEJOGASOLINE 3/29/95 2A , 6 E,QCOASTAL MAVERICK 109440 3201 E HARRISON, HARLINGENGASOLINE 3/27/95 1B , 1A E,QCOASTAL MAVERICK 109594 4100 COFFEE PORT, BROWNSVILLEGASOLINE 3/29/95 2 , 2A E,Q* COMBES AUTO TRUCK STOP INC111477 HWY 77, COMBESGASOLINE 7/31/96 2 , 2A E,QCONNIE TAGLE 107450 FM 2925, ARROYO CITYGASOLINE 11/16/93 2 , 6 E,Q* DE LEON CHEVRON & AUTO REPAIR112245 901 S F ST, HARLINGENGASOLINE, WASTE OIL 3/3/97 2 , 2A E,QDEYO C E 100510 701 EAST HIGHWAY 77, SAN BENITOGASOLINE 9/25/91 2 , 2A E,QDISCOUNT OILS,LUBES&FUELS INC. 096551 4311 FM 511, BROWNSVILLEDIESEL 8/18/90 2A , 1A E,QDYNA GO PROPERTIES 108368 2200 E JACKSON, BROWNSVILLEGASOLINE 7/6/94 2 , 2A E,QE Z SERVE PETROLEUM MARKETING 102395 FM 802, BROWNSVILLEGASOLINE 3/27/92 5B , 1A E,QTNRCC - 22

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236CAMERONPSTE Z SERVE PETROLEUM MARKETING 104782 246 E HWY 83, LA FERIAGASOLINE 10/2/92 2 , 2A E,QEXXON COMPANY USA 091129 1454 CENTRAL BLVD, BROWNSVILLEGASOLINE 9/17/86 2 , 4 E,QEXXON COMPANY USA 100501 1725 INTERNATIONAL BLVD, BROWNSVILLEGASOLINE 8/12/91 2A , 6 E,QEXXON COMPANY USA 100502 745 W ELIZABETH ST, BROWNSVILLEGASOLINE 8/12/91 2 , 4 E,QEXXON COMPANY USA 102414 1423 E HARRISON ST, HARLINGENUNKNOWN 10/25/91 2 , 2A E,QEXXON COMPANY USA 106423 1925 W TYLER, HARLINGENGASOLINE 4/1/93 2 , 2A E,QFE&JA KNAPP LTD PARTNERSHIP 097201 117 E TYLER, HARLINGENWASTE OIL 4/3/90 2 , 2A E,QFEDERAL AVIATION ADMIN 103973 BROWNSVILLE AIRPORT, BROWNSVILLEGASOLINE 7/27/92 2A , 1A E,QFFP OPERATING PARTNERS 092022 4522 S F ST, HARLINGENGASOLINE 7/18/88 2 , 4 E,QFFP OPERATING PARTNERS 093161 1515 INTERNATIONAL BLVD, BROWNSVILLEGASOLINE 6/6/89 2 , 4 E,Q* FFP OPERATING PARTNERS LP111241 301 COLORADO, RIO HONDOGASOLINE 6/19/96 2 , 2A E,QFISCA OIL CO INC 094715 1202 W TYLER, HARLINGENGASOLINE 1/18/90 2 , 2A E,QFRUIA LUKE JR 105752 2645 BERNARD ST, BROWNSVILLEGASOLINE, WASTE OIL 1/7/93 2 , 2A E,QGM NATIONAL HOLDING COMPANY 091653 715 BILLY MITCHELL BLVD, BROWNSVILLEGASOLINE 2/8/88 2 , 4 E,QGROENDYKE TRANSPORT INC 092594 HWY 48, BROWNSVILLEDIESEL 2/2/89 2A , 2A E,QHAMILTON ELECTRIC 096598 FM 509, SAN BENITOGASOLINE 8/29/90 2 , 2A E,QHARLINGEN NATIONAL BANK 103185 MAIN ST, SANTA ROSAGASOLINE 4/23/92 2 , 2A E,QHARLINGEN WATER WORKS SYSTEM 109150 110 W HARRISON, HARLINGENGASOLINE 11/16/94 2A , 1A E,QHARLINGEN WATER WORKS SYSTEM 109930 134 E VAN BUREN, HARLINGENGASOLINE 10/3/95 2A , 1A E,QHARRINGTON KATHY 092508 FM 1847, ARROYO CITYUNKNOWN 1/11/89 2A , 1A E,QHERMANS WHOLESALE OPTICAL 093945 875 S SAM HOUSTON, SAN BENITOGASOLINE 11/7/89 2 , 2A E,QHICKS OIL & BUTANE CO 092910 225 QUEEN ISABELLA, PORT ISABELDIESEL 4/28/89 2 , 6 E,QHICKS OIL & BUTANE CO 099156 619 E HARRISON, HARLINGENGASOLINE 5/17/91 2 , 2A E,QHICKS OIL & BUTANE CO 099588 1601 N 77 SUNSHINE STRIP, HARLINGENGASOLINE 6/3/91 2 , 2A E,Q* HICKS OIL & BUTANE CO107318 HWY 281, SANTA MARIAGASOLINE 10/4/93 2 , 2A E,QHICKS OIL & BUTANE CO 107420 HWY 281, PROGRESSOGASOLINE 11/9/93 2A , 1A E,QHICKS OIL & BUTANE CO 107904 2275 N HWY 77, BROWNSVILLEGASOLINE 3/3/94 2A , 1A E,Q* HICKS OIL & BUTANE CO109074 726 NORTH EXWY, HARLINGENGASOLINE, DIESEL 1/9/95 2 , 2A E,QHYGEIA DAIRY CO 098845 720 S F ST, HARLINGENDIESEL 5/6/91 2 , 5 E,Q* J & E OIL CO112608 504 MILITARY HWY, BROWNSVILLEGASOLINE 8/27/97 1B , 1A E,Q* J & E OIL CO112609 5200 PAREDES LINE RD, BROWNSVILLEGASOLINE 9/9/97 1B , 1A E,Q* J & E OIL CO112610 1044 E 7TH ST, BROWNSVILLEGASOLINE 9/9/97 1B , 1A E,Q* J & E OIL CO112611 5205 BOCA CHICA, BROWNSVILLEGASOLINE 9/7/97 1B , 1A E,Q* J & E OIL CO112634 501 E COLORADO RD, RIO HONDOGASOLINE 9/12/97 1B , 1A E,Q* J & E OIL CO112645 701 STENGER, SAN BENITOGASOLINE 9/12/97 1B , 1A E,Q* J & E OIL CO112652 317 N 13TH ST, HARLINGENGASOLINE 9/12/97 1B , 1A E,QJ & S STOP N SHOP 097093 701 E RIO HONDO RD, HARLINGENGASOLINE 10/4/90 2 , 2A E,QJ C PENNEY CO INC 106429 301 MEXICO BLVD, BROWNSVILLEGASOLINE 3/19/93 2A , 1A E,QJ W RENEAU POULTRY & EGGS 111225 1201 S F ST, HARLINGENGASOLINE 9/27/96 1B , 1A E,QJAMES ROGERS C/O VALLEY MARINE 107791 2702 S 77 SUNSHINE STRIP, HARLINGENWASTE OIL, HYDR FLUID 12/10/93 2A , 1A E,QJETER ENTERPRISES INC 099384 2114 BOCA CHICA BLVD, BROWNSVILLEGASOLINE, WASTE OIL 6/14/91 2A , 1A E,QJORGE ALLALA 109099 1743 BOCA CHICA BLVD, BROWNSVILLEGASOLINE 7/26/94 2 , 2A E,QJOSE GALARZA 109473 FM 803, SAN BENITOGASOLINE 5/11/95 2 , 2A E,QJOSEPH PHILLIPS 111164 8999 W BUS HWY 83, HARLINGENGASOLINE 6/12/96 2 , 2A E,Q* JUANA LONGORIA112434 1102 S F ST, HARLINGENGASOLINE 6/24/97 5B , 1A E,QMARTHA GARCIA 109447 117 S MAIN ST, LA FERIAGASOLINE 5/9/95 1B , 1A E,QMELCHOR CHAVEZ 110158 EXPWY 77, OLMITOGASOLINE 12/12/95 2 , 2A E,QMERCANTILE BANK 104170 990 ROBERTSON, SAN BENITOGASOLINE 8/12/92 2 , 6 E,QTNRCC - 23

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236CAMERONPSTMION TERRAZZO TILE & MARBLE CO 106525 2545 N 77 SUNSHINE STRIP, HARLINGENGASOLINE 4/22/93 2 , 2A E,QMONTGOMERY WARD 106430 MEXICO BLVD, BROWNSVILLEGASOLINE 3/19/93 2 , 2A E,QMOODY ROY 096922 HWY 281, LOS INDIOSGASOLINE 10/11/90 2 , 2A E,QPEPSI COLA BOTTLING 099349 310 N EYE ST, HARLINGENDIESEL 6/11/91 2 , 2A E,QPHILEN J G JR CO 102793 1020 E WASHINGTON, BROWNSVILLEGASOLINE 4/24/92 2 , 6 E,Q* POINT ISABEL ISD112033 HWY 100, PORT ISABELUNKNOWN 1/2/97 2 , 2A E,QPUBLIC UTILITIES BOARD 105848 1433 RIDGEMONT DR, BROWNSVILLEGASOLINE 1/19/93 2 , 6 E,QQ C ENERGY L C 093634 1520 W HARRISON, HARLINGENGASOLINE 9/21/89 2 , 3 E,QQ C ENERGY L C 098207 1821 S 77 SUNSHINE STRIP, HARLINGENGASOLINE 3/1/91 2 , 2A E,QQ C ENERGY L C 100537 635 INTERNATIONAL BLVD, BROWNSVILLEGASOLINE 10/16/91 2 , 2A E,QQ. C. ENERGY, L.C. 092027 4500 E 14TH9 ST, BROWNSVILLEGASOLINE 7/19/88 2 , 4 E,Q* Q. C. ENERGY, L.C.102282 605 CENTRAL BLVD, BROWNSVILLEGASOLINE 2/11/92 2 , 2A E,QQUEEN ISABELLA DEVELOPMENT J V 103088 1 QUEENS POINT DR, PORT ISABELGASOLINE 5/8/92 2 , 2A E,QRICHTER BAKING CO 095747 1500 W HARRISON, HARLINGENGASOLINE 6/5/90 2 , 4 E,QRIO GRANDE VALLEY SUGAR GROWER 095854 HWY 107, SANTA ROSAGASOLINE, DIESEL 6/15/90 2 , 2A E,QRIO GRANDE VALLEY SUGAR GROWER 101998 HWY 107, SANTA ROSAWASTE OIL 1/10/92 2 , 2A E,Q* RIO GRANDE VALLEY SUGAR GROWER109078 HWY 107, SANTA ROSAGASOLINE 1/16/95 2 , 2A E,QROLLINS TRUCK LEASING 109983 2025 BILLY MITCHELL BLVD, BROWNSVILLEDIESEL 10/26/95 2 , 2A E,QSAMEK CARL 099490 PAREDES LINE RD, BROWNSVILLEGASOLINE 7/10/91 2A , 2A E,QSANCHEZ RUPERTO 099283 112 E HWY 77, SAN BENITODIESEL 6/18/91 2A , 1A E,QSCHULGEN GEORGE 097343 1535 LOS EBANOS BLVD, BROWNSVILLEGASOLINE 11/28/90 5B , 1A E,QSEARS, ROEBUCK, AND CO. 107351 2320 NORTH EXPY, BROWNSVILLEWASTE OIL 10/21/93 2 , 6 E,QSOCORRO LONGORIA 096184 MAIN ST, SANTA MARIAGASOLINE 7/17/90 2A , 1A E,QSSP PARTNERS 091176 1364 LOS EBANOS, BROWNSVILLEGASOLINE 12/1/86 2 , 2A E,QSSP PARTNERS 091178 3855 INTERNATIONAL, BROWNSVILLEGASOLINE 12/1/86 2 , 2A E,QSSP PARTNERS 096923 2810 N COMMERCE, HARLINGENGASOLINE 10/10/90 2 , 2A E,QSSP PARTNERS 099383 2913 PADRE BLVD, SOUTH PADRE ISLANDGASOLINE 6/25/91 2 , 2A E,QSSP PARTNERS 102054 1653 HWY 100, PORT ISABELGASOLINE 3/5/92 2 , 2A E,QSSP PARTNERS 103706 515 CENTRAL BLVD, BROWNSVILLEGASOLINE 5/18/92 2 , 2A E,QSSP PARTNERS 109435 105 BILLY MITCHELL, BROWNSVILLEGASOLINE 3/29/95 2 , 2A E,QSSP PARTNERS 110015 620 W HARRISON, HARLINGENGASOLINE 11/1/95 2 , 2A E,QSSP PARTNERS 110596 304 S SAM HOUSTON, SAN BENITOUNKNOWN 1/25/96 2 , 2A E,Q* SSP PARTNERS110597 1125 INTERNATIONAL BLVD, BROWNSVILLEUNKNOWN 12/21/95 2 , 2A E,QSSP PARTNERS 110599 102 E QUEEN ISABELLA, PORT ISABELUNKNOWN 1/23/96 2 , 6 E,QSSP PARTNERS 110600 3602 N COMMERCE, HARLINGENUNKNOWN 1/25/96 2 , 6 E,QSSP PARTNERS 110601 930 MORGAN BLVD, HARLINGENUNKNOWN 12/21/95 2A , 1A E,QSSP PARTNERS 110603 845 INTERNATIONAL BLVD, BROWNSVILLEUNKNOWN 1/25/96 2 , 6 E,QSSP PARTNERS 110604 1544 PALM BLVD, BROWNSVILLEUNKNOWN 1/25/96 2 , 2A E,QSSP PARTNERS 110605 898 SAM HOUSTON, SAN BENITOUNKNOWN 1/29/96 2 , 2A E,Q* SSP PARTNERS110678 1204 N HWY 77, HARLINGENUNKNOWN 3/28/96 2 , 2A E,QSSP PARTNERS 110679 1025 TYLER, HARLINGENUNKNOWN 3/28/96 2 , 2A E,QTEXACO REFINING & MARKETING 106222 1826 W TYLER, HARLINGENGASOLINE 2/25/93 2 , 2A E,Q* TEXAS STATE TECHNICAL COLLEGE112834 2424 BOXWOOD, HARLINGENDIESEL, WASTE OIL 12/5/97 1B , 1A E,QTIP O TEX CHEVROLET 109889 508 E ELIZABETH, BROWNSVILLEGASOLINE 9/20/95 2 , 6 E,QTONY ANCONA 093868 5800 FRONTAGE, BROWNSVILLEGASOLINE 10/30/89 2 , 2A E,QTONY MARTINEZ 101417 1375 PALM BLVD, BROWNSVILLEGASOLINE, WASTE OIL 1/8/92 2A , 6 E,QTRUCKERS TERMINAL INC 092562 3700 N COMMERCE, HARLINGENGASOLINE 2/1/89 2 , 2A E,QTXDOT 101738 HWY 77, SAN BENITOGASOLINE 1/31/92 2 , 2A E,QTNRCC - 24

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236CAMERONPSTCAMPPSTCARSONPCD/CAPCD/SUPU SERVE ENTERPRISES INC 105151 344 PAREDES LINE RD, BROWNSVILLEGASOLINE 11/9/92 2 , 2A E,Q* US IMMIGARTION NATURALIZATION112626 BUENA VISTA RD, LOS FRESNOSUNKNOWN 9/26/97 2 , 2A E,QVAL GAS INC. 103103 RABB RD, LA FERIAGASOLINE, DIESEL 3/24/92 2 , 6 E,QVALLEY BAPTIST MEDICAL CENTER 100055 2101 PEASE ST, HARLINGENDIESEL 7/21/91 2 , 4 E,QVALLEY INTERNATIONAL AIRPORT 099902 AIRPORT DR, HARLINGENGASOLINE, DIESEL, JET FUEL 7/1/91 2 , 6 E,QVALLEY SHAMROCK 111900 2636 BOCA CHICA BLVD, BROWNSVILLEGASOLINE 11/7/96 2A , 6 E,QVALLEY SHAMROCK INC 097565 201 S F ST, HARLINGENGASOLINE, DIESEL 12/19/90 2 , 2A E,QVALLEY STAR INC 107365 HWY 107, SANTA ROSAGASOLINE 7/20/93 2A , 1A E,QWALTER KELLER DISTRIBUTORS 091729 695 S SAM HOUSTON, SAN BENITOGASOLINE 3/11/88 2 , 2A E,QWALTER KELLER DISTRIBUTORS 102942 3375 BOCA CHICA, BROWNSVILLEGASOLINE 4/30/92 2 , 2A E,QE-Z MART STORES, INC. 097705 200 GREER BLVD, PITTSBURGGASOLINE 1/7/91 2 , 2A E,QFERNDALE FISHING CLUB 104144 FM 1519, PITTSBURGGASOLINE 8/6/92 2 , 6 E,QJ & J OIL COMPANY 091743 271 GREER BLVD, PITTSBURGGASOLINE 12/1/87 2A , 2A E,QPILGRIMS PRIDE CORP 097774 110 S TEXAS ST, PITTSBURGGASOLINE, DIESEL, WASTE OIL 1/3/91 2 , 6 E,QSOUTHWESTERN BELL TELEPHONE CO 096588 130 COMPRESS, PITTSBURGGASOLINE 8/27/90 2 , 4 E,QWINKLE OIL CO 097106 HWY 11, LEESBURGGASOLINE 10/30/90 2A , 1A E,QPANTEX PLANT, US DEPARTMENT OF ENERGY 30459 13 MILES NE OF AMARILLO ON US 60ORGANICS, METALS, EXPLOSIVES 10/21/92 3A , 4 E,Q,V,1,2,3PANTEX DOE PLANT PANTEX VILLAGE, 17 MILES NE OF AMARILLO ON BENZENE, TCE, HIGHHWY. 60EXPLOSIVES, CHROMIUM7/1/91 5A , 2A E,Q,V,1,2,3CASSPSTENF/WSTPSTPANHANDLE BUTANE & OIL CO INC 096161 212 ELSIE ST, PANHANDLEGASOLINE 2/21/90 2 , 4 E,QCASS COUNTY TREATING CO. 32765 304 HALL ST, LINDENPENTACHLOROPHENOL 11/25/86 3B , 1A EQV23BROOKS OPERATING 110695 HWY 59, ATLANTAUNKNOWN 3/26/96 1B , 1A E,QDUNCAN THOMPSON PETROLEUM 093152 HWY 77, SMYRNAGASOLINE 6/8/89 2 , 2A E,QDUNCAN THOMPSON PETROLEUM 093999 HWY 77, THREE STATESGASOLINE 10/30/89 2 , 2A E,QDUNCAN THOMPSON PETROLEUM 094314 HWY 77, SMYRNAGASOLINE 10/13/89 2 , 2A E,QDUNCAN THOMPSON PETROLEUM 095136 605 W MAIN, ATLANTAGASOLINE 3/13/90 2 , 2A E,QDUNCAN THOMPSON PETROLEUM 095980 E HWY 77, SMYRNAGASOLINE 6/22/90 2 , 2A E,QDUNCAN THOMPSON PETROLEUM 097108 1204 N LOUISE, ATLANTAGASOLINE 10/24/90 2 , 2A E,Q* FIRST NATIONAL BANK106416 1110 N LOUISE ST, ATLANTAGASOLINE, DIESEL 2/26/93 2 , 2A E,QJERRY GRIFFIN 106090 704 W MAIN, ATLANTAGASOLINE 2/9/93 5B , 2A E,QMASON JEWELL 096372 200 N MAIN, LINDENGASOLINE 8/7/90 2 , 2A E,QSHAW CHARLES 099231 704 E 1ST ST, HUGHES SPRINGSGASOLINE 6/10/91 2 , 2A E,QTRUMAN ARNOLD COMPANIES 094210 402 HWY 59, QUEEN CITYGASOLINE 9/4/89 2 , 2A E,QTXDOT 102816 FM 249, ATLANTAGASOLINE, WASTE OIL 12/27/91 2 , 2A E,Q* TXDOT112078 2207 W MAIN ST, ATLANTAUNKNOWN 1/27/97 2 , 6 E,QTNRCC - 25

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236CASTROPSTCHAMBERSIHWPCD/CAPSTCHEROKEEPSTCHILDRESSFODPCD/VCPSTALLSUP PETROLEUM, INC. 101475 501 W BEDFORD, DIMMITTGASOLINE 12/16/91 2 , 2A E,Q* GTE SOUTHWEST INC105313 113 NE 2ND ST, DIMMITTDIESEL 11/12/92 2 , 2A E,QBAYER (MILES) 30603 800 WEST BAY ROAD, BAYTOWNORGANICS,METALS 5/4/89 3A , 3,4,5 E,Q,V,2,3BAYER (MILES) 30603 800 WEST BAY ROAD, BAYTOWNORGANICS,METALS 5/4/89 2B , 3 E,Q,V,2,3ALLTEL SERVICE CORPORATION 099672 2ND, WINNIEGASOLINE, WASTE OIL 7/25/91 2 , 5 E,QBROWN & ROOT INC 097207 FM 563, ANAHUACGASOLINE, DIESEL 12/18/89 2 , 2A E,QFDIC 099142 509 S MAIN ST, ANAHUACGASOLINE 7/17/90 2A , 1A E,QRESOLUTION TRUST CORP 099445 HWY 124, WINNIEGASOLINE, DIESEL 6/19/91 2 , 2A E,QSPEEDWAY SUPERAMERICA LLC 092320 10402 IH--10, MONT BELVIEUGASOLINE 11/15/88 2 , 2A E,QSPEEDY STOP FOOD STORES, LTD. 096082 HWY 124, WINNIEGASOLINE 6/18/90 2 , 2A E,QSTAR ENTERPRISE 107321 8909 HWY 146, MOUNT BELVIEUGASOLINE 9/3/93 2A , 6 E,QSUNCHASE ENTERPRISE INC 091160 IH-10, WINNIEGASOLINE 8/25/86 2A , 2A E,Q* TRI CON, INC.099850 HWY 124, WINNIEGASOLINE 6/3/91 2 , 2A E,QBUSH & BAILEY INC 091564 302 S JACKSON ST, JACKSONVILLEGASOLINE 1/1/80 5B , 2A E,QCENTRAL BAPTIST CHURCH 092368 402 S MAIN, JACKSONVILLEGASOLINE 11/28/88 5B , 6 E,Q* DANDY DOUBLE INC112904 N HWY 69, WELLSGASOLINE, DIESEL 12/12/97 1B , 1A E,QGLASS OIL COMPANY 092225 401 S BELTON ST, JACKSONVILLEGASOLINE 9/1/88 2 , 2A E,QGLASS OIL COMPANY 092226 501 S JACKSON ST, JACKSONVILLEGASOLINE 9/1/88 2 , 2A E,Q* H T TREADWELL OIL CO108701 400 W LARISSA ST, JACKSONVILLEGASOLINE 10/5/94 5B , 2A E,QJACKSONVILLE DAILY PROGRESS 092797 201 AUSTIN ST, JACKSONVILLEGASOLINE 4/3/89 2 , 2A E,QJOHNNY PETRI 104934 E HWY 79, JACKSONVILLEGASOLINE 10/8/92 5B , 2A E,QKIRKLAND OIL COMPANY 092282 120 W LARISSA, JACKSONVILLEGASOLINE 11/3/88 5B , 1A E,QMARTIN MAUREEN 100893 HWY 856, NEW SUMMERFIELDGASOLINE 11/13/91 2A , 1A E,Q* POLK OIL CO INC100528 S HWY 69, ALTOGASOLINE, DIESEL 10/14/91 2 , 2A E,QPOWELL BILLY 100494 HWY 110, NEW SUMMERFIELDGASOLINE, DIESEL 10/4/91 2 , 5 E,QRUTH HEARNE 093924 533 S JACKSON, JACKSONVILLEGASOLINE 12/1/88 5B , 6 E,Q* SPENCER DISTRIBUTING112787 HWY 69, ALTOGASOLINE 9/16/97 1B , 1A E,QTRUMAN ARNOLD COMPANIES 091565 391 LARISSA ST, JACKSONVILLEGASOLINE 8/26/87 2 , 4 E,QTXDOT 097590 609 S DICKINSON DR, RUSKDIESEL 12/20/90 2 , 6 E,QUNKNOWN 091478 S JACKSON, JACKSONVILLEGASOLINE 9/24/87 5B , 2A E,QBURLINGTON NORTHERN RR SOUTHWEST CORNER OF HWY US83 AND AVE C BENZENE, TOTAL 1,2-DICHOLROETHENE,TETRACHOLORETHENE,TRICHOLORETHENE9/3/92 ,BURLINGTON NORTHERN RAILROAD 417 100 12TH STREET, NW, CHILDRESSCHLORINATED SOLVENTS 12/13/96 0 , 4 E* ANADARKO DEVELOPMENT CO110920 400 NE AVE F, CHILDRESSUNKNOWN 2/23/96 2 , 2A E,QTNRCC - 26

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236CHILDRESSPSTCLAYPSTCOCHRANPSTCOKEWUDPSTCOLEMANPSTCOLLINMSWPCD/CAPCD/VCFAA 103732 MUNICIPAL AIRPARK, CHILDRESSGASOLINE 7/1/92 2A , 6 E,QGARRISON INC 108723 HWY 287, CHILDRESSGASOLINE 10/4/94 2 , 2A E,QJOE TARRANT OIL CO 097222 701 NE AVE F, CHILDRESSGASOLINE, DIESEL 5/12/90 5B , 2A E,QKERR MCGEE REFINING CORP 094194 111 NE AVE F, CHILDRESSGASOLINE 11/10/89 2 , 2A E,Q* RDJ INVESTMENTS111306 608 NW AVE F, CHILDRESSUNKNOWN 7/9/96 2 , 2A E,Q* TXDOT095703 1710 AVE B, CHILDRESSGASOLINE 6/5/90 2 , 2A E,Q* TXDOT097741 1700 NW AVE F, CHILDRESSGASOLINE 12/13/90 2 , 2A E,QTXDOT 106393 1700 AVE G, CHILDRESSGASOLINE, DIESEL 6/4/92 2 , 2A E,QFFP OPERATING PARTNERS 096382 N HWY 287, BELLEVUEGASOLINE, DIESEL 6/25/90 2 , 2A E,QLAUGHON W E 092996 108 OMEGA, HENRIETTAGASOLINE 4/20/89 2 , 2A E,QPARKER MAYO INC 091618 HWY 171, BYERSDIESEL 11/12/87 2 , 2A E,QSONIC DRIVE INN 110356 402 E OMEGA, HENRIETTAGASOLINE 1/24/96 2 , 2A E,Q* R C VAUGHAN OIL CO INC096187 202 ARTHUR ST, WHITEFACEGASOLINE 7/12/90 2 , 2A E,QROY TRAGER 109426 102 N MAIN, MORTONGASOLINE 1/31/95 5B , 1A E,QMORTON PUBLIC WATER SUPPLY 0400001 WELL 1 (G0400001A) - SE OF JEFFERSON AVE. AND BENZENE 1/27/95 2C , 5 E,Q,V,21ST ST.BUTLER ELROY 103990 HWY 377, BRONTEGASOLINE 7/24/92 5B , 1A E,QR A BAGWELL OIL CO 111371 HWY 277, BRONTEGASOLINE, DIESEL 6/28/96 2 , 2A E,Q* TOWN & COUNTRY FOOD STORES INC112392 101 S HWY 77, BRONTEUNKNOWN 6/18/97 2 , 2A E,QBERRY MARKETING 103805 1401 NECHES, COLEMANGASOLINE 6/19/92 2A , 1A E,QBOB LOYD LP GAS CO 108780 FM 1770, NOVICEGASOLINE 6/29/94 2A , 1A E,QF B ROUDOULF 092023 HWY 153, COLEMANGASOLINE 7/19/88 2A , 1A E,Q* LESLIE DOBBINS112508 1800 COMMERCIAL ST, COLEMANGASOLINE 7/29/97 2 , 2A E,Q* SKINNY'S INC.108533 501 COMMERCIAL, COLEMANGASOLINE, DIESEL 7/11/94 2 , 2A E,QSKINNYS INC 111032 716 N NECHES, COLEMANGASOLINE 5/19/96 2 , 2A E,Q* TAYLOR MOTOR CO108964 216 W LIVE OAK, COLEMANGASOLINE 12/27/94 2 , 2A E,QTXDOT 098892 W HWY 206, COLEMANGASOLINE 5/6/91 2 , 2A E,QCITY OF WYLIE: MW-12 AND 13 MSW00712 0.5 MI. SE OF ST. HWY 78 & FM 2514 INTERSECTION, VOCs (TOLUENE) 7/1/87 2A , 2B E,Q,V,2WYLIE, TX.GNB INC. (UNICORP) 30516 7471 S. FIFTH STREET, FRISCOLEAD, CADMIUM, PH 5/2/88 3A , 2 E,Q,V,110.437 ACRE VACANT TRACT OF LAND 358 1801 EAST 14TH STREET @ JUPITER ROAD, PLANO HYDROCARBONS 9/30/96 0 , 6 E* FUTURE ADDISON TRANSIT CENTER470 4801-4807 ARAPAHO ROAD, ADDISONSOLVENTS, METALS 2/19/97 0 , 2A ETNRCC - 27

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236COLLINPCD/VCPST* SEC FM 720 AND PRESTON ROAD (FRISCO) 660 SOUTHEAST CORNER FM 720 & PRESTON ROAD, PETROLEUM SUBSTANCES 11/25/97 0 , 2 EFRISCO* SECURITY STORAGE501 1919 WEST 15TH STREET, PLANOHYDROCARBONS 4/9/97 0 , 2 ETOM THUMB SHOPPING CENTER 255 2200 14TH STREET @ JUPITER ROAD, PLANOSOLVENTS, VOCS 5/16/96 0 , 5 EVACANT TRACT OF LAND/ARAPAHO ANDQUORUM204 SOUTHWEST CORNER ARAPAHOE AND QUORUM,ADDISONTPH, PETROLEUM HDROCARBONS 3/15/96 0 , 2 EANDY FRENCH 110024 2210 HWY 121, MELISSAGASOLINE 10/30/95 2A , 6 E,QBLUEBONNET SAVINGS BANK #1900 104975 300 N MCDONALD, MCKINNEYUNKNOWN 8/4/92 1B , 1A E,Q* BOLIN OIL CO. & WILDLFE MUSEUM108864 1028 N MCDONALD, MCKINNEYGASOLINE, DIESEL 8/17/94 2A , 1A E,QBOWLING JIM 098888 105 HWY 78, BLUE RIDGEGASOLINE 4/15/90 1B , 6 E,QBURTON OIL CO INC 108440 HWY 289, PROSPERGASOLINE 4/25/94 2A , 6 E,Q* CAIN OIL CO101724 608 N FEDERAL, ALLENGASOLINE, DIESEL 1/30/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 103455 6100 INDEPENDENCE PKWY, PLANOGASOLINE 6/15/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106875 1101 W PARKER, PLANOGASOLINE 6/22/93 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY107486 1925 DALLAS PKWY, PLANOGASOLINE 11/19/93 2 , 2A E,QCITY OF WYLIE 091227 WYLIEDIESEL 1/30/87 2 , 2A E,QDALWORTH OIL CO 094292 E FM 2802, ANNAGASOLINE 10/23/89 1B , 1A E,QEXXON COMPANY USA 096085 4001 W PARK BLVD, PLANOGASOLINE, DIESEL 9/26/90 2 , 6 E,QEXXON COMPANY USA 099901 3140 INDEPENDENCE PKWY, PLANOGASOLINE 9/9/91 2A , 6 E,QEXXON COMPANY USA 102416 1901 N CENTRAL EXWY, MCKINNEYUNKNOWN 8/8/91 2 , 6 E,Q* EXXON COMPANY USA110826 202 N CENTRAL EXWY, MCKINNEYGASOLINE 4/12/96 2 , 2A E,QFDIC 103203 501A HWY 78, WYLIEGASOLINE 5/22/92 2 , 2A E,QFFP OPERATING PARTNERS 109626 175 SOUTHVIEW DR, LUCASGASOLINE 6/22/95 2 , 2A E,QFINA OIL & CHEMICAL CO 094522 1421 N CENTRAL EXWY, PLANOGASOLINE 12/28/89 2 , 2A E,QFINA OIL & CHEMICAL CO 094524 123 N GREENVILLE, ALLENGASOLINE 12/28/89 2A , 6 E,QFINA OIL & CHEMICAL CO 098906 301 S FEDERAL DR, ALLENGASOLINE 4/19/91 2 , 2A E,QFINA OIL & CHEMICAL CO 108014 2024 W 15TH, PLANOGASOLINE 3/3/94 2 , 2A E,QFINA OIL AND CHEMICAL 095958 2498 AVE K, PLANOGASOLINE 6/1/90 2A , 6 E,QFINA OIL AND CHEMICAL 097290 945 PARKER RD, PLANOGASOLINE 11/15/90 2A , 6 E,QFORD MOTOR COMPANY 104884 3333 W PLANO PKWY, PLANOHYDR FLUID 10/6/92 2A , 1A E,QGARDERE & WYNNE LLP 094612 HWY 289, FRISCOGASOLINE 1/10/90 2 , 4 E,QGNB INC 106075 7471 S 5TH ST, FRISCODIESEL 3/11/93 1B , 1A E,QINTECOM INC 106078 601 INTECOM DR, ALLENDIESEL 2/8/93 2 , 2A E,Q* MARTIN EAGLE OIL CO INC112749 727 N MCDONALD, MCKINNEYGASOLINE 10/30/97 2 , 2A E,Q* MCKINNEY ISD111135 800 MCDONALD ST, MCKINNEYGASOLINE 6/3/96 2 , 2A E,QMOBIL OIL 110513 1101 PRESTON RD, PLANOUNKNOWN 3/8/96 2 , 2A E,QMOBIL OIL 110587 3932 W SPRING CIRCLE PKWY, PLANOUNKNOWN 3/11/96 1B , 1A E,QMOBIL OIL CORP 097084 3201 AVE K, PLANOGASOLINE 10/10/90 2 , 6 E,QMOBIL OIL CORP 098252 1800 AVE K, PLANOGASOLINE 3/13/91 2 , 4 E,QMOBIL OIL CORP 098529 3940 W 15TH ST, PLANOGASOLINE 4/4/91 2 , 6 E,Q* MOBIL OIL CORP111238 101 S CENTRAL EXWY, MCKINNEYUNKNOWN 11/18/94 1B , 1A E,Q* MOBIL OIL CORP111418 801 E UNIVERSITY DR, MCKINNEYUNKNOWN 11/17/94 1B , 1A E,Q* MR. QUICK111948 1019 S GREENVILLE AVE, ALLENGASOLINE 11/26/96 2 , 2A E,QNIXON CHARLES D 101835 799 W UNIVERSITY DR, MCKINNEYGASOLINE 12/16/91 2 , 6 E,QNORTHEAST TEXAS READY-MIX, INC 093497 FM 1378, WYLIEDIESEL 8/18/89 2 , 2A E,Q* ONE STOP FOOD STORE, INC105779 1902 N CENTRAL EXWY, MCKINNEYGASOLINE 11/25/92 2 , 2A E,QONE STOP FOOD STORES 111707 215 E UNIVERSITY, MCKINNEYGASOLINE, DIESEL 9/18/96 2 , 2A E,QTNRCC - 28

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236COLLINPSTCOLLINGSWORTHPSTCOLORADOPSTCOMALPST* ONE STOP FOOD STORES INC106698 6100 W PARK, PLANOGASOLINE 4/21/93 2 , 2A E,QROADSIDE STATIONS INC. 106398 503 HWY 78, WYLIEGASOLINE 3/29/93 5B , 6 E,Q* ROBERT BURNETT109524 409 S OKLAHOMA ST, CELINAGASOLINE 5/5/95 2 , 2A E,QS & S PETROLEUM CO 098286 3995 PARKER RD, WYLIEGASOLINE 11/30/90 2 , 2A E,Q* SANCO DESIGN INC105090 1600 E 14TH ST, PLANOGASOLINE, DIESEL, WASTE OIL 9/16/92 2 , 2A E,QSCOTT LEWIS 095555 FM 2478 AND HWY 380, MCKINNEYGASOLINE 3/26/90 2A , 2A E,QSOUTHLAND CORP 093255 900 W SPRING CREEK PKWY, PLANOGASOLINE 6/22/89 2A , 6 E,QSOUTHLAND CORP 103052 3209 AVE K, PLANOGASOLINE 2/28/92 2 , 2A E,QSTAR ENTERPRISE 098767 1801 AVE K, PLANOGASOLINE 4/26/91 2 , 6 E,QSWITZER PETROLEUM PRODUCTS 111710 1950 HWY 78, WYLIEGASOLINE, DIESEL 9/19/96 2 , 2A E,QSWITZER PETROLEUM PRODUCTS 111713 1620 INDEPENDENCE, PLANOGASOLINE 9/23/96 2 , 2A E,QSWITZER PETROLEUM PRODUCTS INC 094159 2716 AVE K, PLANOGASOLINE 11/2/89 2 , 2A E,QSWITZER PETROLEUM PRODUCTS INC 102709 1601 N CENTRAL EXWY, PLANOGASOLINE 4/17/92 2 , 2A E,QSWITZER PETROLEUM PRODUCTS INC 111649 2431 E 14TH ST, PLANOGASOLINE 8/22/96 2 , 2A E,QTRIPLE A OIL CO INC 110199 HWY 121, MELISSAGASOLINE 12/26/95 2 , 2A E,QUS ARMY CORPS ENGINEERS 101852 3375 SKYVIEW DR, WYLIEGASOLINE, DIESEL 7/10/91 2 , 2A E,QYOUNG OIL COMPANY 094526 2200 COIT RD, PLANOGASOLINE 12/28/89 2 , 2A E,Q* GEO BIT EXPLORATION INC111752 900 NW AVE F, CHILDRESSUNKNOWN 10/9/96 2 , 2A E,QHOLTON OIL CO 103223 1101 8TH ST, WELLINGTONGASOLINE 5/24/92 2 , 2A E,QHOLTON OIL CO 103945 FM 1036, SAMNORWOODGASOLINE 5/5/92 2 , 2A E,Q* OWENS & SONS100808 1604 8TH ST, WELLINGTONGASOLINE 10/31/91 2 , 2A E,QTXDOT 095692 FM 338, WELLINGTONGASOLINE, WASTE OIL 6/5/90 2 , 2A E,QLAKE OIL COMPANY 110168 917 E MAIN ST, EAGLE LAKEGASOLINE 12/8/95 2 , 2A E,QM J DRAPER 097597 S HWY 71, COLUMBUSGASOLINE 12/17/90 2 , 2A E,QRAY BARTELS 103037 1114 FANNIN, COLUMBUSGASOLINE 5/5/92 2 , 5 E,QRUSSELL RENICK 104029 1216 WALNUT, COLUMBUSGASOLINE 7/20/92 2 , 2A E,Q* SEIFERT OIL CO102892 E HWY 90, WEIMARGASOLINE 4/13/92 2 , 2A E,Q* SEIFERT OIL CO107446 POST OFFICE, EAGLE LAKEGASOLINE 11/4/93 2 , 2A E,QSTAR ENTERPRISE 106392 2215 HWY 71, COLUMBUSGASOLINE 2/4/93 2 , 6 E,QWES GILBREATH CO 098273 IH--10, COLUMBUSDIST F OIL 3/12/90 2A , 1A E,QARLON KOEHLER 106932 395 UNION ST, NEW BRAUNFELSGASOLINE 7/2/93 2A , 1A E,QBERNIE BOWDEN 110113 508 N UNION, NEW BRAUNFELSGASOLINE 11/27/95 2 , 6 E,QCINCO J INC (JOHNSON OIL) 108685 1081 W IH-35, NEW BRAUNFELSGASOLINE 9/22/94 1B , 1A E,QCIRCLE K 110659 486 LANDA, NEW BRAUNFELSUNKNOWN 3/27/96 2 , 6 E,QCITY OF NEW BRAUNFELS 104275 770 N LAKEVIEW BLVD, NEW BRAUNFELSGASOLINE, DIESEL 7/23/92 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 093912 570 S SEGUIN ST, NEW BRAUNFELSGASOLINE 10/24/89 2 , 2A E,QKIN PROPERTIES, INC. 092414 508 LANDA ST, NEW BRAUNFELSGASOLINE 11/9/88 2 , 5 E,QLAFARGE INC/WESTERN RAILROAD 109069 3000 WALD RD, NEW BRAUNFELSDIESEL 2/11/93 2 , 6 E,QMCKENNA HOSPITAL 110048 143 E GARZA, NEW BRAUNFELSDIESEL 3/22/95 2A , 1A E,QMIDTEX OIL INC 099985 3501 S IH--35, NEW BRAUNFELSGASOLINE 8/27/91 2 , 2A E,QNEW BRAUNFELS ISD 109860 599 BUTCHER ST, NEW BRAUNFELSGASOLINE 6/13/95 2A , 6 E,QTNRCC - 29

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236COMALPSTWQDNEW BRAUNFELS UTILITIES 103819 333 KLINGEMAN, NEW BRAUNFELSGASOLINE, DIESEL 7/9/92 2 , 2A E,Q* RICK BRANDON107381 HWY 306, CANYON LAKEGASOLINE 9/30/93 2 , 2A E,Q* STRASBURGER ENTERPRISES INC108042 1200 E IH--35, NEW BRAUNFELSGASOLINE 2/24/94 2 , 2A E,QSUNBELT CEMENT 096959 WALD, NEW BRAUNFELSDIESEL 10/10/90 2 , 6 E,QUNKNOWN 091241 730 S HWY 46, NEW BRAUNFELSGASOLINE 2/25/87 5B , 1A E,Q* UNKNOWN112171 HWY 281, SPRING BRANCHUNKNOWN 3/11/97 1B , 1A E,QUS ARMY 101264 25800 RALPH FAIR RD, BOERNEGASOLINE 11/22/91 2 , 2A E,QWAL MART STORES INC 111230 3900 1/2 N IH-35, NEW BRAUNFELSOTHER 6/28/96 2 , 6 E,QUSGS FREON PLUME STUDY 5 WELLS (68-22-801, 68-22-805, 68-23-304, 68-30-215, CCL3F (FREON) 6/3/76 1 , 2B Q,V,2,3& 68-30-312) AND 2 SPRINGS (68-15-901 & 68-23-304)IN COMAL COUNTYCOMANCHEPSTWQDCONCHOPSTCOOKEPCD/CAPST* ALLENE BOEN112835 101 S TEXAS, DE LEONUNKNOWN 12/12/97 1B , 1A E,QCENTRAL TEXAS ENERGY SUPPLIERS 096261 102 S PINTO, COMANCHEUNKNOWN 7/26/90 2 , 2A E,QCOMANCHE COUNTY COOP 095010 201 W WRIGHT, COMANCHEGASOLINE 10/12/89 2 , 2A E,Q* COMANCHE ISD112500 VALLEY FORGE DR, COMANCHEGASOLINE, WASTE OIL 7/23/97 1B , 1A E,Q* GARY WACKER112030 400 S TEXAS, DE LEONGASOLINE 12/19/96 2 , 2A E,Q* GARY WACKER112031 100 W NAVARRO, DE LEONGASOLINE 12/19/96 2 , 2A E,Q* JACK WILKERSON109148 HWY 377, PROCTORGASOLINE, DIESEL 12/1/94 2A , 1A E,QLIGHTFOOT OIL CO 111806 HWY 6, RUCKERGASOLINE 11/13/96 1B , 1A E,Q* TOM TAYLOR112602 701 W CENTRAL, COMANCHEGASOLINE 8/27/97 5B , 1A E,QTDA PESTICIDE SURVEY 4105505 WELL NO. 41-05-505 (SAMPLE 1171-91-003)METOLACHLOR 9/4/90 2D , 1 V,2,3"COMANCHE 31"TDA PESTICIDE SURVEY 4105508 WELL NO. 41-05-508 (SAMPLE REP 2) "COMANCHE 9" 2,4,5-T 6/1/87 2D , 2B E,Q,V,2BOB LOYD L P GAS CO 099689 HWY 83, PAINT ROCKGASOLINE, DIESEL 7/19/91 5B , 2A E,QUNKNOWN 092044 EDENUNKNOWN 6/28/88 5B , 1A E,QDESOTO, INC. - SOUTHLAND 30372 1101 SOUTHLAND, GAINESVILLETOLUENE 1/25/90 0 , 4 EBURTON OIL CO INC 108436 IH--35 ST, GAINESVILLEGASOLINE 4/25/94 2 , 2A E,QBURTON OIL CO INC 108438 FAIR, GAINESVILLEGASOLINE 4/25/94 2 , 2A E,QBURTON OIL CO INC 108439 424 E CALIFORNIA ST, GAINESVILLEGASOLINE 4/25/94 2 , 2A E,Q* CHAPMAN INC109944 2205 N IH-35, GAINESVILLEGASOLINE 9/21/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108490 508 JEFFERSON ST, GAINESVILLEGASOLINE, DIESEL 7/14/94 2 , 2A E,QCITY OF GAINESVILLE 098772 601 N IH--35, GAINESVILLEGASOLINE 4/30/91 2 , 2A E,Q* COASTAL MART INC112806 406 N GRAND, GAINESVILLEGASOLINE 9/11/97 1B , 1A E,QDOUGLASS DISTRIBUTING 111472 1708 E HWY 80, GAINESVILLEGASOLINE, DIESEL 8/8/96 2 , 2A E,QDOUGLASS DISTRIBUTING CO 098931 525 DAVIS ST, GAINESVILLEDIESEL 5/4/91 2 , 2A E,Q* HUCHTON NEIL098502 W HWY 82, MUENSTERGASOLINE 4/4/91 2 , 5 E,QRETAIL BUILDINGS INC 108578 400 W CALIFORNIA ST, GAINESVILLEGASOLINE 8/31/94 2A , 6 E,QTNRCC - 30

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236COOKEPSTCORYELLPSTCRANEPSTCROSBYPSTDALLAMPSTDALLASENF/WSTSOUTHLAND CORP 092142 304 W CALIFORNIA, GAINESVILLEGASOLINE 8/7/88 2A , 6 E,Q* T M T INC112234 1205 E CALIFORNIA, GAINESVILLEGASOLINE 3/25/97 2 , 2A E,QTOTAL PETROLEUM INC 095030 1003 N GRAND, GAINESVILLEGASOLINE 2/15/90 2 , 2A E,QCIRCLE K CORP 092625 1200 MAIN ST, GATESVILLEGASOLINE 5/6/88 2 , 4 E,QCITY OF GATESVILLE 098517 106 S 23RD ST, GATESVILLEGASOLINE, DIESEL 3/5/91 2 , 2A E,QFINA OIL & CHEMICAL CO 095004 1415 E HWY 190, COPPERAS COVEGASOLINE 3/6/90 2 , 2A E,Q* FINA OIL & CHEMICAL CO107620 21ST, GATESVILLEGASOLINE 12/22/93 2 , 2A E,QGULF SERV-U CENTER 097325 1111 E MAIN, GATESVILLEGASOLINE, WASTE OIL 4/3/90 5B , 1A E,QTEXAS DEPT CRIMINAL JUSTICE 100475 FM 215, GATESVILLEGASOLINE 9/9/91 2A , 1A E,QUNKNOWN 093038 N 7TH ST, GATESVILLEUNKNOWN 5/19/89 5B , 1A E,Q* BOLEN F C105636 10TH, CRANEGASOLINE, DIESEL 12/22/92 2 , 2A E,QBOLEN F C OIL CO INC 096556 601 6TH ST, CRANEGASOLINE, DIESEL 8/15/90 2 , 2A E,QABELL CHEVROLET-OLDS CO 093929 614 MAIN, RALLSGASOLINE 10/2/89 2 , 2A E,QABELL-PREWITT IMPLEMENT 102660 104 W MAIN, CROSBYTONGASOLINE, DIESEL 4/2/92 2 , 2A E,QASSOCIATED COTTON GROWERS 094311 WAKE GIN, WAKEGASOLINE 11/17/89 2 , 6 E,QCROSBY COUNTY PRECINCT #2 094743 200 FRONT ST, CROSBYTONGASOLINE 1/12/90 2 , 2A E,QE Z MART STORES INC 109297 6600 BROADWAY, GALVESTONGASOLINE 1/23/95 2 , 2A E,QJIMMY DEWBRE 101301 505 W MAIN ST, CROSBYTONGASOLINE 12/13/91 5B , 1A E,QLORENZO GRAIN/CROSBY CO. FUEL 103186 HWY 82, LORENZOGASOLINE 5/18/92 2 , 6 E,Q* REEVES TILLMAN100382 311 W MAIN, CROSBYTONGASOLINE 9/24/91 2 , 2A E,QTXDOT 091589 100 MAINTENANCE CTR, RALLSGASOLINE 8/1/87 2 , 2A E,QWYLIE INC 096334 1510 AVE E, RALLSGASOLINE, DIESEL 8/1/90 2 , 6 E,Q* DALHART CONSUMERS FUEL ASSOC112159 N HWY 87, DALHARTUNKNOWN 3/12/97 2 , 2A E,QUNKNOWN 111835 TRINIDAD, DALHARTUNKNOWN 11/6/96 5B , 1A E,Q* WEST TEXAS GAS INC.112713 905 N HWY 87, DALHARTUNKNOWN 10/14/97 2A , 1A E,QBUILDERS TRANSPORT/JAY LINES 73252 3413 ROY ORR BOULEVARD, GRAND PRAIRIEVOC 8/15/90 2C , 2A EDAL-TILE 37369 7834 CF HAWN FREEWAY, DALLASLEAD 4/1/91 3B , 3 E* DAL-TILE - PLEASANT RUN, DALLAS39971 PLEASANT RUN RD, 1/4 MI W OF POST OAK, DALLAS LEAD 5/7/97 3B , 3 EQDIXIE METALS 30136 3030 MCGOWAN RD, DALLASSULFATES, PB, CD 4/17/85 3B , 2A EQVGNB INC - FARMERS BRANCH 31697 1880 VALLEY VIEW RD., FARMER'S BRANCHCONTAMINATION NOT FOUND 8/24/92 4B , 6C EQVLANE CONTAINER 39407 11180 DENTON DRIVE, DALLASTPH, PENTACHLOROPHENOL,TCE 10/17/90 2 , 4 EQV1MURDOCK MACHINE & ENGINEER (EDWARDS) 30743 5100 AIRPORT FREEWAY WEST, IRVINGTCE,SOLVENTS,TPH 10/20/90 3B , 5 EQNL INDUSTRIES/MAINLAND LAND & EQUIP. CO. 38182 1000 BLOCK SARGENT ROAD, DALLASLEAD 10/10/91 3B , 1 EQRATHON (DIVERSEY CHEM CO. - DUBOIS) 30602 CENTRAL FREEWAY @ RIVER OAKS, DALLASVOC 8/1/88 C3 , 5 EQ2UNION PACIFIC - DALLAS MKT RAILYARD 81424 2224 NORTH HOUSTON ST., DALLAS, TXDIESEL,BENZENE,TPH 11/8/90 3B , 3 EQVAN WATERS AND ROGERS COMPANY 31657 4707 ALPHA RD, DALLASCHLORONATED SOLVENTS,HYDROCARBONS1/1/97 3B , 3 EQV23TNRCC - 31

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASENF/WSTIHWMSWWELLMARK INTERNATIONAL (ZOECON) 30702 12200 DENTON DRIVE, DALLASORGANICS, SOLVENTS,PESTICIDESASHLAND CHEMICAL CO. 32371 3101 WOOD DR., GARLANDMETHANOL, XYLENE,ETHYLBENZENE, TOLUENE,TETRACHLOROETHENECITY OF GARLAND: MW-5 AND 9. MSW01062A IN THE NE CORNER OF THE GARLAND CITY LIMITS,ADJ TO AND ON THE N SIDE OF CASTLE DR. BETWROWLETT AND MILES RDS., 2.75 MI. NE OF INT OF FM66 AND MKT RR, DALLAS CO., TX.VOCs (TCE, PCE, 1,1-DICHLOROETHANE, CIS-1,2-DICHLOROETHENE, AND VINYLCHLORIDE)6/14/91 3B , 5 E5/1/92 3C , 2A E,Q,6/21/94 1B , 2A E,Q,V,2PCD/CAPCD/ENFPCD/SUPASHLAND CHEMICAL CO. 32371 3101 WOOD DR., GARLANDMETHANOL,XYLENE,ETHYLBENZENE,TOLUENE,TETRACHLOROETHENEDART S&I FACILITY (DALLAS) T0263 TRUNK AVE. 7 OAK LANE, DALLASTCE AND DAUGHTERCOMPOUNDS5/1/92 3C , 3 E,Q,V3/12/92 2A , 1&2B EMOHAWK LABORATORIES 30437 IRVINGTCE 10/1/93 2 , 2 ENAVAL AIR STATION - DALLAS 65033 DALLASHYDROCARBONS, VOC 7/18/86 3A , 2 E,Q,V,3NAVAL WEAPONS INDUSTRIAL RESERVE PLANT 31268 9314 WEST JEFFERSON STREET, DALLASORGANICS, TCE 1/23/87 3A , 2,3,4 E,Q,V,2- DALLASSANTANDER BELTLINE, LTD. 33899 TREND & BELTLINEVOCS 8/11/90 1 , 6 ESOUTHFAIR COMM. DEV. CORP. (DALLAS) T0535 OAK LANE & MEYERS, DALLASMINOR TCE 11/28/95 0 , 0 E* STAR ENTERPRISE/DALLAS31775 3900 SINGLETON BLVD, DALLASGASOLINE CONSTITUENTS 5/8/90 1C , 2A ESUPERIOR COATINGS (GEMINI IND INC) 34561 7330 HAWN, DALLASBTEX 9/1/86 2B , 5 EQV23TU ELECTRIC - DALLAS SES 31884 1601 BRYAN ST, DALLASTPH 12/13/89 2C , 1 EQV2AMRESCO (VINEYARD PROP) 52089 2600 CEDAR SPRINGS RD., DALLASCHLORONATED SOLVENTS &GASOLINE CONSTITU4/1/91 2B , 2A EQV2ARATEX SERVICES - DALLAS 55207 1703 CHESTNUT ST., DALLASTRICHLOROETHYLENE, ORG 4/11/88 2A , 2A ECOMPOUNDCONOVER SITE, CLOSED 80084 129 S.E. 17TH STREET, GRAND PRAIRIE, TX2B , 2BDAL-CHROME CO., INC. 65246 3044 MORRELL STREET, DALLASNICKEL,CHROMIUN 12/3/93 0 , 4 eFLINT INK, INC. 30656 3120 HALIFAX STREET, DALLAS, TEXAS 75247 PCE, TCE, PHASE SEPARATEDHYDROCARBONS1/13/93 2B , 2B ELORAL VOUGHT SYSTEMS CORP. 32208 1701 W. MARSHALL DRIVE, GRAND PRAIRIETCE,DCE 8/7/92 2B , 3 ELUCENT TECHNOLOGIES (AT&T MICROELECT) 31049 3000 SKYLINE DRIVE, MESQUITETETRACHLOROETHYLENE,SOLVENTS11/3/83 3C , 5 EQV YNORTH TEXAS SALVAGE POOL 52070 509 IDLEWILD RD., GRAND PRAIRIELEAD 10/14/91 2A , 3 EQOCCIDENTAL CHEM CORP - DALLAS 30914 8800 CENTRAL FREEWAY, DALLASAS, PH 2/17/94 3 , 4A EV12SARGENT-SOWELL, INC. 30460 1172, 107TH STREET, GRAND PRAIRIEXYLENE,MIDRANGEHYDROCARBONS,FREE PRO8/10/80 1B , 0 EQV2TEXAS INSTRUMENTS - DALLAS (N CEN FWY) 30555 13500 NORTH CENTRAL FREEWAY, DALLASORGANIC SOLVENTS,CHROMIUM 11/30/83 2B , 3 EVOUGHT AIRCRAFT 31286 9314 W. JEFFERSON BLVD.,DALLAS, TX 7521TCE, VOC'S, DNAPL'S, CHROMIUM 1/11/94 3A , 2A EQVAMERICAN FEDERAL BANK 4110 CEDAR LAKE DR., DALLASXYLENE 2/12/93 0 , 1 EBAPTIST FOUNDATION 1600 SINGLETON, DALLASOIL, BTEX 3/30/93 2B , 1 ELOUISIANA PACIFIC, ROUNDS AND PORTER9233 DENTON DRIVEDICHLOROETHYLENE,TETRACHLOROETHYLENE3/12/93 1A , 1A EMURMUR CORPORATION 31234 2727 NORTH WESTMORELANDLEAD 5A , 3 E,Q,V,2,3TNRCC - 32

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPCD/SUPPCD/VCPAN COASTAL PARTNERSHIP 3525 MCKINNEY AVE, DALLASTETRACHLOROETHYLENE 11/2/92 1A , 1A ESTAR ENTERPRISE TERMINAL 3900 SINGLETON BLVD., DALLASOIL, BTEX 4/23/92 0 , 4 E1280 AND 1300 GREENVILLE AVENUE 216 COLLINS ROAD AND GREENVILLE AVE.,SOLVENTS 3/29/96 0 , 6C ERICHARDSON* 18.466 ACRE TRACT OF LAND454 NE CORNER OF IH-35 AND WEST NW HIGHWAY, METALS/CHLORINATEDDALLASSOLVENT/PETROHYDROCARBONS2/4/97 0 , 2 E* 23.64 ACRE TRACT OF LAND/SHILOH RD & 475 NW CORNER OF SHILOH ROAD & BELTLINE ROAD, BTEX, SOLVENTS, METALS 2/26/97 0 , 3 EBELTLINEGARLAND8.5 ACRE PARCEL/EMPIRE CENTRAL DR./IH-35 233 8383 NORTH STEMMONS FREEWAY, DALLASCHLORINATED SOLVENTS 4/18/96 0 , 2 E8383 STEMMONS EXPRESSWAY CO-APP (VCP 368 8383 STEMMONS FREEWAY, DALLASVOCS 10/8/96 0 , 2 E233)8383 STEMMONS EXPRESSWAY CO-APP (VCP 354 8383 STEMMONS FREEWAY, DALLASVOCS 9/26/96 0 , 2 E233)* AIRCONDEX380 2674 FREEWOOD, DALLASMETALS, VOCS 10/29/96 0 , 2 EATRIUM DOOR AND WINDOW COMPANY 186 9001 AMBASSADOR ROW, DALLASPILT, BTEX, TPH 2/27/96 0 , 4 EBELL HELICOPTER TEXTRON INC., PLANT 5 018 1700 NORTH HIGHWAY 360, GRAND PRAIRIECHLORINATED SOLVENTS 9/21/95 0 , 3 EBROOKHOLLOW WAREHOUSE 230 3191 COMMONWEALTH DRIVE, DALLASCHLORINATED HYDROCARBONS, 4/12/96 0 , 3 EMETALS, TPH* CAMPBELL TAGGART BAKERY RESEARCH 551 6211 LEMMON AVENUE, DALLASCHLORINATED SOLVENTS 6/23/97 0 , 2 EFACILITYCOMET CLEANERS 170 12817 PRESTON ROAD, SUITE 121, DALLASCHLORINATED SOLVENTS 1/23/96 0 , 0 E* DOVER ELEVATOR COMPANY455 7017 CARPENTER FREEWAY, DALLASTPH, VOCS 2/6/97 0 , 2 EESTATE OF ALYNE B. HAYMAN 202 6417 CEDAR SPRINGS ROAD, DALLASMETALS, VOC 3/13/96 0 , 0 E* FORMER AVIALL LOVE FIELD FACILITY606 9311 REEVES STREET, DALLASSOLVENTS 9/9/97 0 , 2 EFORMER DALLAS GAS AND FUEL COMPANY 165 NW CORNER OF ROSS AND RECORD STREET,DALLASVOCS 1/22/96 0 , 6 EFORMER GRAPHICS ENGRAVING FACILITY 033 2001 NORTH GRIFFIN STREET, DALLASSOLVENTS, METALS 9/11/95 0 , 2B EFORMER ROACH PAINT FACILITY 175 NW CORNER OF FIELD AND WOODALL ROGERS FR, VOCS, SVOCS, METALS 2/5/96 1 , 6C EDALLASFORMER TOP HAT CLEANERS/CASA LINDAPLAZA296 SE CORNER GARLAND ROAD/BUCKNER BLVD, CHLORINATED SOLVENTS 7/16/96 0 , 2 EDALLASFORMER UNITED CONCRETE PIPE (SMALL 331 2401 VINSON STREET, DALLASCHLORINATED SOLVENTS 9/3/96 0 , 2 ETRACT)FRANKFORD TRADE CENTER 218 1700 BLOCK WEST FRANKFORD ROAD,CARROLLTONMETHANE GAS 4/1/96 0 , 2B E* G. H. HENSLEY LANDFILL502 2108 JOE FIELD ROAD, DALLASMETALS 4/11/97 1 , 2 E* GC GASCARD SERVICES637 12900 HARRY HINES BOULEVARD, FARMERSBTEX, TPH 10/21/97 1B , 1 EBRANCHGEENVILLE JUNCTION SHOPPING CENTER 055 5111 GREENVILLE AVENUE, DALLASSOLVENTS 11/6/95 0 , 5 E* GIFFORD-HILL TRACT626 316 HUNTER FERRELL ROAD, IRVINGPCB, TPH, SVOCS, VOCS 10/10/97 0 , 2 EHARRY HINES SITE 302 11198 HARRY HINES BOULEVARD, DALLASMETALS AND HYDROCARBONS 7/26/96 0 , 6 E* JOHN EAGLE LINCOLN MERCURY DEALERSHIP 410 6102, 6110, 6116, 6120 LEMMON AVENUE, DALLAS TPH, VOC, METALS 12/4/96 0 , 1 E* JONES BLAIR COMPANY308 2728 EMPIRE CENTRAL, DALLASPETROLEUM 8/6/96 0 , 3 E* LAWS STREET BLOCK 390506 LAWS STREET BLOCK 390, DALLASPETROLEUM HYDROCARBONS 4/15/97 1 , 0 E* MIRABELLA APARTMENTS578 2600 COLE, DALLASVOCS, TPH 7/28/97 0 , 2 E* PLAZA RIOS SHOPPING CENTER377 8602-8698 SKILLMAN STREET, DALLASCHLORINATED SOLVENTS 10/22/96 0 , 2 E* PRESTO CLEAN-ALL; PRESTON FOREST VILLAGE 381 11661 PRESTON ROAD, SUITE 204, DALLASCHLORINATED SOLVENTS 10/29/96 0 , 2 E* PRESTONWOOD VILLAGE II/SPECIALTY420 15203 KNOLL TRAIL DRIVE, DALLASCHLORINATED SOLVENTS 12/17/96 0 , 3 ECLEANERSPRESTONWOOD VILLAGE SHOPPING CENTER 333 NE CORNER ARAPAHO ROAD AND KNOLL TRAIL,DALLASCHLORINATED SOLVENTS 9/9/96 0 , 3 ETNRCC - 33

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPCD/VCPSTR. M. GRAPHICS SITE 314 2537 WILLOWBROOK DRIVE, DALLASVOCS 8/13/96 0 , 3 E* SKILLMAN ABRAMS SHOPPING CENTER436 6650-6780 ABRAMS ROAD, DALLASHYDROCARBONS 1/17/97 0 , 0 EST. STEPHENS CLEANERS 432 2788 VALWOOD PARKWAY, FARMERS BRANCH CHLORINATED SOLVENTS 1/7/97 0 , 3 ETEXAS INSTRUMENTS CENTRAL EXPRESSWAY 374 13532 NORTH CENTRAL EXPRESSWAY, DALLAS CHLORINATED SOLVENTS, VOC'S 10/10/96 0 , 3 ESITE* TEXAS INSTRUMENTS, INC. LEMMON AVE. 650 6000 LEMMON AVENUE, DALLASCHLORINATED SOLVENTS 1/2/97 0 , 2 EFACILITY/RAYTTHREE TRACTS, FLORA & LEONARD; ROSS AVE 147 SE CORNER FLORA & LEONARD/2301-2318 ROSS,DALLASVOCS, SVOCS, METALS, TPH 12/13/95 0 , 2 ETRI-GAS CORPORATION 227 3301 SOUTH NATIONAL STREET, DALLASLIME, ACETYLENE CONDENSATE 4/12/96 0 , 2 E* TURTLE CREEK SITE510 SW CORNER LEMMON AVE & CARLISLE STREET, VOCS, TPH, METALS 4/22/97 0 , 6 EDALLASUNDEVELOPED LAND ON STATE HIGHWAY 183 270 SH 183 350 FEET EAST OF BRITAIN ROAD, IRVING TPH, VOCS 6/6/96 0 , 2 E* VACANT MAX STORE438 11455 GARLAND ROAD, DALLASHYDROCARBON 1/21/97 0 , 6C EVACANT TRACT IN ROWLETT, TEXAS 426 HIGHWAY 66/0.5 MI. EAST OF LIBERTY GROVE, BTEX 1/2/97 0 , 4 EROWLETT* VACANT TRACT OF LAND - MCKINNEY AVENUE 481 2332 MCKINNEY AVENUE, DALLASHYDROCARBONS, CHLORINATEDSOLVENTS3/6/97 0 , 5 EVAN WATERS & ROGERS 419 1102 AVENUE R, GRAND PRAIRIEVOC, TPH 12/13/96 0 , 2 EVIRGINIA KMP CORPORATION 189 4100 PLATINUM WAY, DALLASTPH, VOCS, SVOCS, METALS,PCBS2/29/96 0 , 2 EABF FREIGHT SYSTEMS, INC. 101772 4444 IRVING BLVD, DALLASUNKNOWN 1/28/92 2 , 5 E,QADDISON AIRPORT 091471 4788 ROSCOE TURNER, DALLASUNKNOWN 8/15/87 2 , 6 E,QADDISON AIRPORT OF TEXAS, INC. 092419 ADDISON RD, ADDISONJET FUEL 11/18/88 2A , 2A E,QAETNA LIFE INSURANCE COMPANY 096423 2727 LBJ FRWY, DALLASDIESEL 7/5/90 2 , 2A E,QAGTX-ANG 097412 8150 W JEFFERSON BLVD, DALLASDIESEL 12/4/90 2A , 1A E,Q* AKARD PLACE JOINT VENTURE112073 2311 CAROLINE ST, DALLASUNKNOWN 1/27/97 2 , 6 E,Q* ALAMO RENT A CAR111143 7650 ESTATE RD, IRVINGUNKNOWN 6/4/96 2 , 2A E,QALEXANDER K A 096280 3421 S BRIERY RD, IRVINGGASOLINE, CHEMICAL 7/21/89 2 , 2A E,Q* ALYKA, INC107684 11038 HARRY HINES BLVD, DALLASGASOLINE 1/18/94 2 , 2A E,QAMERICAN PRODUCTS CO 103767 10701 SHADY TRL, DALLASDIESEL 7/8/92 2A , 6 E,QANTHONY ABRAHAM ENTERPRISES 091852 5200 W AIRPORT FWY, IRVINGDIESEL 4/19/88 2 , 2A E,QAPRIL MARKETING & DIST CORP 105770 9400 HWY 66, ROWLETTGASOLINE 8/6/92 1B , 1A E,QARAMARK UNIFORM SERVICES 091487 1900 EMPIRE CENTRAL, DALLASGASOLINE 9/10/87 2 , 4 E,QAUSTIN BRIDGE & ROAD 096318 1300 DULUTH ST, DALLASGASOLINE, DIESEL 7/27/90 2 , 2A E,QAUSTIN INTERNATIONAL VENTURES 094896 1000 SINGLETON BLVD, DALLASGASOLINE 1/9/90 2 , 2A E,QAUSTIN INTERNATIONAL VENTURES 103603 1200 SINGLETON BLVD, DALLASGASOLINE 1/9/90 2 , 2A E,QAUSTIN PAVING BRIDGE & ROAD CO 097974 11143 GOODNIGHT LN, DALLASCHEMICAL 2/4/91 2 , 4 E,Q* AUTOFUEL CO112488 410 DOWDY FERRY RD, HUTCHINSUNKNOWN 7/21/97 2 , 2A E,QAVENUE D CORP 096808 418 W AVE D, GARLANDGASOLINE 9/18/90 2 , 5 E,QAVIALL 095175 7515 LEMMON AVE, DALLASJET FUEL 3/19/90 2 , 2A E,QAZARI AHMAD 106272 322 CADIZ, DALLASGASOLINE 2/2/93 2A , 4 E,QB & B PRODUCTS CO 101893 6921 N BELTLINE RD, IRVINGGASOLINE, DIESEL 1/30/92 2 , 2A E,Q* B A WHITMARSH112731 1010 EDMONDS, LEWISVILLEGASOLINE 10/6/97 1B , 1A E,QBASN CORP 100593 3710 LIVE OAK, DALLASGASOLINE 10/9/91 2 , 2A E,QBEN E KEITH COMPANY 099842 1840 RECORD CROSSING, DALLASGASOLINE, DIESEL, HYDR FLUID 9/15/90 2 , 2A E,QBERNICE MOODY 092088 400 N MAIN ST, DUNCANVILLEGASOLINE 8/4/88 1B , 1A E,QBEVERS JOEII 100303 2001 N HALL ST, DALLASUNKNOWN 9/6/91 5B , 2A E,QBFI, INC. 101134 450 E CLEVELAND, HUTCHINSGASOLINE 7/29/91 2 , 6 E,QTNRCC - 34

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPST* BILLY D. COX112211 10606 GOODNIGHT LN, DALLASUNKNOWN 4/4/97 1B , 1A E,QBISHOP COMPANIES 092973 2515 IRVING BLVD, DALLASDIESEL 2/1/89 2 , 6 E,QBONNET RESOURCES CORP 095547 2682 FOREST LN, DALLASGASOLINE 4/25/90 2A , 6 E,QBORDEN INC 097460 5327 S LAMAR ST, DALLASGASOLINE 11/8/90 2 , 2A E,QBOWMAN TRANSPORTATION INC 094165 11430 NEWKIRK ST, DALLASDIESEL 12/19/89 2 , 6 E,Q* BRADFORD CO112519 3060 IRVING BLVD, DALLASGASOLINE 7/22/97 2 , 2A E,QBROCKWAY STANDARDS 104774 3301 S LAMAR, DALLASDIESEL 9/9/92 2 , 5 E,QBROWN EXPRESS INC 104953 1250 SLOCUM ST, DALLASDIESEL 10/7/92 2A , 6 E,QBROWN RENTAL EQUIPMENT CO 107164 1706 N IH--35 E, DALLASDIESEL, KEROSENE 12/28/92 2 , 6 E,QBUDDY BEENE 092510 9405 WEBB CHAPEL RD, DALLASGASOLINE 12/19/88 2 , 2A E,Q* C X TRANSPORTATION112505 219 N LOOP 12, IRVINGGASOLINE, DIESEL 10/28/97 2 , 2A E,QCATELLUS DEVELOPMENT CORP 092458 2608 INWOOD RD, DALLASGASOLINE 1/1/87 2 , 6 E,QCENTRECORP MANAGEMENT SERVICES 098096 1503 N STORY RD, IRVINGCHEMICAL 11/2/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091088 4023 CEDAR SPRINGS RD, DALLASGASOLINE 6/13/86 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091205 10002 MARSH LN, DALLASGASOLINE 1/14/87 2 , 5 E,QCHEVRON PRODUCTS COMPANY 091289 401 W AIRPORT FWY, IRVINGGASOLINE 4/28/87 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091554 1712 SCYENE RD, MESQUITEGASOLINE 12/4/87 2 , 4 E,QCHEVRON PRODUCTS COMPANY 091644 3001 KNOX ST, DALLASGASOLINE 12/29/87 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091775 525 W MAIN ST, GRAND PRAIRIEGASOLINE 4/2/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091838 225 W ILLINOIS, DALLASGASOLINE 4/28/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 091897 8235 S HAMPTON RD, DALLASUNKNOWN 5/23/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092158 1619 MARTIN LUTHER KING BLVD, DALLASGASOLINE 9/20/88 2 , 4 E,Q* CHEVRON PRODUCTS COMPANY092292 738 E CENTERVILLE RD, GARLANDGASOLINE 9/1/88 2 , 5 E,QCHEVRON PRODUCTS COMPANY 092442 300 W ARAPAHO RD, RICHARDSONGASOLINE 2/25/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092839 18049 LBJ FWY, MESQUITEUNKNOWN 4/17/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092955 1300 N ZANG BLVD, DALLASGASOLINE 4/11/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093737 7470 GREENVILLE, DALLASGASOLINE 9/11/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 094158 14906 PRESTON RD, DALLASDIESEL 11/21/89 2 , 5 E,QCHEVRON PRODUCTS COMPANY 095394 15099 MIDWAY, ADDISONGASOLINE 3/20/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 095544 7107 IH--35, DALLASGASOLINE 4/12/90 2 , 5 E,QCHEVRON PRODUCTS COMPANY 097021 9855 KINGSLEY RD, DALLASGASOLINE 10/19/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 097179 504 S BECKLEY AVE, DALLASGASOLINE 10/25/90 2 , 4 E,QCHEVRON PRODUCTS COMPANY 097308 707 S CARROLL, DALLASGASOLINE 11/20/90 2A , 6 E,QCHEVRON PRODUCTS COMPANY 097309 10800 FERGUSON RD, DALLASGASOLINE 11/20/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 097419 2727 MARTIN LUTHER KING BLVD, DALLASGASOLINE 12/3/90 2 , 5 E,QCHEVRON PRODUCTS COMPANY 097465 201 CORINTH, DALLASGASOLINE, DIESEL 12/5/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 097728 2198 E ARAPAHO, RICHARDSONGASOLINE 1/4/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 097838 3606 SUNNYVALE ST, DALLASGASOLINE 1/25/91 2A , 6 E,QCHEVRON PRODUCTS COMPANY 098751 8817 CLARK RD, DALLASGASOLINE 4/25/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 100251 101 W CAMPBELL RD, RICHARDSONGASOLINE 9/9/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 101199 108 E HWY 80, MESQUITEGASOLINE 10/16/91 2A , 6 E,QCHEVRON PRODUCTS COMPANY 102539 14051 HARRY HINES BLVD, FARMERS BRANCH DIESEL 4/3/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 103583 934 E IRVING BLVD, IRVINGGASOLINE 6/19/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 103868 14535 COIT RD, DALLASGASOLINE, DIESEL 6/11/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 104092 2315 LOOP 12, DALLASGASOLINE 7/27/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 104467 2869 LOOP 12, DALLASGASOLINE 8/25/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 104471 717 E JEFFERSON, GRAND PRAIRIEGASOLINE 8/25/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 105358 7651 CAMPBELL RD, DALLASGASOLINE 11/23/92 2 , 2A E,QTNRCC - 35

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTCHEVRON PRODUCTS COMPANY 106077 1607 REGAL ROW, DALLASGASOLINE 9/8/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106543 1320 W MILLER, GARLANDGASOLINE 4/28/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106723 12516 NORTHWEST HWY, DALLASGASOLINE 4/21/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106900 5651 LEMMON DR, DALLASGASOLINE 4/19/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 107091 8210 S LANCASTER, DALLASGASOLINE 5/4/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 107111 501 W BELT LINE RD, RICHARDSONGASOLINE, DIESEL 12/7/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 107604 4015 S WALTON WALKER, DALLASGASOLINE 4/30/93 2A , 6 E,Q* CHEVRON PRODUCTS COMPANY109097 9446 GARLAND AVE, DALLASGASOLINE, OTHER 1/6/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 109362 2434 BELTLINE, GARLANDGASOLINE 2/1/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 109723 301 W MARSHALL, GRAND PRAIRIEGASOLINE 6/16/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110200 1016 W AIRPORT FWY, IRVINGGASOLINE 12/18/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110493 101 E BELTLINE, COPPELLGASOLINE 2/27/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110500 3915 GREAT SOUTHWEST PKWY, GRAND PRAIRIE UNKNOWN 3/8/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110518 3702 JOSEY LN, CARROLLTONGASOLINE 1/4/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110519 1400 E BELTLINE, RICHARDSONGASOLINE 1/4/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110527 501 S LOOP 12, IRVINGGASOLINE 1/23/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110535 1520 N LOOP 12, DALLASGASOLINE 2/15/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110570 901 W PIONEER PKWY, ARLINGTONGASOLINE 1/15/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110655 11801 WEBB CHAPEL, DALLASUNKNOWN 3/28/96 2 , 2A E,QCHEVRON USA 110516 3700 HWY 67, MESQUITEGASOLINE 12/22/96 2A , 6 E,QCHEVRON USA 110517 3080 S JUPITER, GARLANDGASOLINE 1/5/96 2 , 6 E,QCHEVRON USA 110523 8424 PRESTON RD, UNIVERSITY PARKGASOLINE 1/10/96 2A , 6 E,QCHEVRON USA 110799 2358 ROYAL, DALLASGASOLINE 12/20/95 2A , 6 E,QCHEVRON USA INC 097779 3306 GRAND AVE, DALLASGASOLINE 1/18/91 2A , 6 E,QCHEVRON USA INC 099148 10800 FERGUSON, DALLASGASOLINE 5/24/91 2A , 1A E,QCHEVRON USA INC 104816 1320 W MILLER RD, GARLANDGASOLINE 10/22/92 2 , 2A E,QCHEVRON USA INC 107094 703 S MAIN, DUNCANVILLEGASOLINE 5/5/93 2A , 6 E,QCHEVRON USA PRODUCTS CO 098406 9455 FOREST LN, DALLASUNKNOWN 3/19/91 2A , 6 E,QCHEVRON USA PRODUCTS CO 105907 501 W BELTLINE, RICHARDSONUNKNOWN 2/1/93 2A , 1A E,QCHRYSLER REALTY 107509 2713 S GARLAND AVE, GARLANDGASOLINE, WASTE OIL 12/11/92 2 , 6 E,QCHRYSLER REALTY CORP 092928 13439 PRESTON RD, DALLASGASOLINE 4/28/89 2 , 5 E,Q* CHRYSLER REALTY CORP107492 2960 E IH 30, MESQUITEUNKNOWN 7/28/97 2 , 6 E,Q* CHURCH OF JESUS CHRIST110142 1100 W JACKSON RD, CARROLLTONDIESEL 12/14/95 2 , 2A E,QCITY OF CARROLLTON 110003 1650 W FRANKFORD, CARROLLTONGASOLINE, DIESEL 10/30/95 2 , 6 E,QCITY OF DALLAS 091246 8955 ADLORA, DALLASGASOLINE 3/6/87 2 , 2A E,QCITY OF DALLAS 091469 8935 ADLORA LN, DALLASUNKNOWN 9/14/87 2 , 2A E,QCITY OF DALLAS 091507 5000 DOLPHIN RD, DALLASGASOLINE 10/6/87 2A , 2A E,QCITY OF DALLAS 092845 LOVE FIELD, DALLASJET FUEL 4/13/89 2 , 6 E,QCITY OF DALLAS 101917 8935 ADLORE, DALLASOTHER 1/28/92 2A , 1A E,QCITY OF DALLAS 102184 2630 SHORECREST, DALLASGASOLINE, DIESEL 3/9/92 2 , 2A E,QCITY OF DALLAS 102581 8401 DOUGLAS, DALLASDIESEL 2/27/92 2 , 2A E,QCITY OF DALLAS 103878 2426 HATCHER, DALLASGASOLINE, DIESEL 6/19/92 2A , 1A E,QCITY OF DALLAS 103982 INWOOD RD, DALLASUNKNOWN 7/24/92 2A , 1A E,QCITY OF DALLAS 105903 100 S AKARD ST, DALLASUNKNOWN 12/17/92 2A , 1A E,QCITY OF DALLAS 110872 2734 BROOKFIELD AVE, DALLASUNKNOWN 2/21/96 2 , 2A E,QCITY OF FARMERS BRANCH 093459 13333 SENLAC, FARMERS BRANCHGASOLINE 8/1/89 2 , 6 E,QCITY OF FARMERS BRANCH 100260 2535 VALLEY VIEW LN, FARMERS BRANCHGASOLINE, DIESEL 9/9/91 2 , 2A E,QCITY OF GARLAND 094624 1720 E GARLAND AVE, GARLANDDIESEL 1/26/90 2A , 6 E,QTNRCC - 36

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTCITY OF UNIVERSITY PARK 094525 2601 FONDREN, DALLASGASOLINE 11/29/89 2A , 6 E,QCNL RETAIL JOINT VENTURE 110306 1307 STORY RD, IRVINGGASOLINE 8/10/95 2 , 2A E,QCOCA COLA ENTERPRISES INC 091525 6011 LEMMON AVE, DALLASDIESEL 11/9/87 2 , 4 E,QCOLEMAN RED 100175 6930 HARRY HINES BLVD, DALLASGASOLINE 9/17/91 2 , 2A E,QCOMERICA 106017 3420 SINGLETON BLVD, DALLASGASOLINE 2/3/93 2A , 1A E,QCONLEY LOTT NICHOLS MACHINERY 094521 1311 S ERVAY ST, DALLASGASOLINE 12/21/89 2A , 6 E,QCONOCO INC 091402 2501 BELT LINE RD, GARLANDDIESEL 7/17/87 2A , 6 E,QCONOCO INC 096079 3003 LOOP 12, DALLASGASOLINE 6/15/90 2 , 2A E,QCONOCO INC 096697 10705 E LOOP 12, DALLASGASOLINE 9/10/90 2 , 2A E,QCONOCO INC 097724 3308 FORT WORTH AVE, DALLASGASOLINE 1/10/91 2 , 6 E,QCONOCO INC 104012 1725 E MAIN, GRAND PRAIRIEGASOLINE 7/30/92 2 , 2A E,QCONOCO INC 106596 13900 JOSEY LN, FARMERS BRANCHGASOLINE 4/1/93 2 , 2A E,QCONSOLIDATED FREIGHTWAYS 091530 3925 SINGLETON BLVD, DALLASUNKNOWN 11/17/87 2 , 4 E,Q* CORNELIUS & ASSOCIATES112115 2034 W MAIN, GRAND PRAIRIEGASOLINE, DIESEL 1/15/97 2 , 2A E,QCOUTURE PAT - BANKRUPTCY 103143 2302 S CARRIER PKWY, GRAND PRAIRIEGASOLINE 3/25/92 2 , 2A E,QCULLUM COMPANIES INC 091679 2600 MCCREE RD, GARLANDGASOLINE 2/1/88 2 , 2A E,QCURTS OIL CO 106260 506 N 1ST ST, GARLANDGASOLINE 3/2/93 2 , 2A E,QDAL TILE CORP 110187 7834 C F HAWN FWY, DALLASWASTE OIL, GASOLINE 9/2/90 2 , 6 E,QDALLAS AREA RAPID TRANSIT 093873 4127 ELM ST, DALLASDIESEL 10/28/89 2 , 3 E,QDALLAS AREA RAPID TRANSIT 100122 4127 ELM ST, DALLASWASTE OIL 8/15/91 2 , 2A E,QDALLAS AREA RAPID TRANSIT 106366 13315 ELDER, FARMERS BRANCHGASOLINE 11/12/92 2A , 1A E,Q* DALLAS AREA RAPID TRANSIT106761 2424 WEBB CHAPEL, DALLASDIESEL 12/4/91 2 , 2A E,QDALLAS CNTY UTILITY & REC. DST 092069 6000 N O'CONNER BLVD, IRVINGGASOLINE 7/6/88 2 , 4 E,QDALLAS COUNTY 092263 4403 W ILLINOIS AVE, DALLASGASOLINE, DIESEL, WASTE OIL 10/27/88 2 , 2A E,QDALLAS COUNTY 093770 111 COMMERCE ST, DALLASDIESEL 10/6/89 2 , 2A E,QDALLAS COUNTY 095396 2311 JOE FIELD, DALLASGASOLINE 4/4/90 2 , 2A E,QDALLAS PETERBILT, INC. 109927 515 N LOOP 12, IRVINGGASOLINE 9/19/95 2 , 6 E,QDALLAS WHOLESALE BUILDERS SUPP 108676 8330 LOVETT AVE, DALLASGASOLINE 10/3/94 2A , 1A E,Q* DAVID CLARK112186 2318 BEATRICE, DALLASGASOLINE 1/28/97 2 , 6 E,QDEARING DAVID 101691 418 S CORINTH ST, DALLASGASOLINE 1/31/92 2 , 2A E,Q* DEE & DEE OIL CO108095 122 E CLARENDON, DALLASGASOLINE 4/19/94 2 , 2A E,Q* DEE & DEE OIL CO112325 1702 SE 8TH ST, GRAND PRAIRIEGASOLINE 5/9/97 1B , 1A E,QDFW INTERNATIONAL AIRPORT BD 091770 DFW AIRPORT, DFW AIRPORTUNKNOWN 3/11/88 2 , 2A E,QDIAMOND SHAMROCK 105085 1610 NW 19TH ST, GRAND PRAIRIEGASOLINE 9/1/92 2A , 6 E,Q* DIAMOND SHAMROCK112396 4421 MAPLE AVE, DALLASGASOLINE 6/15/97 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG111851 4402 W JEFFERSON, DALLASGASOLINE 11/1/96 1B , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 091208 500 S HAMPTON RD, DALLASGASOLINE 1/20/87 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091371 1300 BELTLINE RD, CARROLLTONGASOLINE 7/6/87 2 , 3 E,QDIAMOND SHAMROCK REF & MKTG CO 091607 1415 W KINGSLEY RD, GARLANDGASOLINE 10/18/84 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 092938 6520 LAKE JUNE RD, DALLASGASOLINE 3/28/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 093126 1501 N HAMPTON RD, DESOTOGASOLINE 5/26/89 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO094665 1005 ZANG BLVD, DALLASGASOLINE 11/8/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 096073 9607 BRUTON RD, DALLASGASOLINE 6/29/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 096078 2655 ROYAL LN, DALLASGASOLINE 6/26/90 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO097046 4002 GREAT SOUTHWEST PKWY, GRAND PRAIRIE GASOLINE 9/27/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 097115 4215 BELT LINE RD, MESQUITEGASOLINE 10/26/90 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 099387 3301 FORT WORTH AVE, DALLASGASOLINE 2/20/89 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099838 2422 W HWY 303, GRAND PRAIRIEGASOLINE 8/7/91 2 , 6 E,QTNRCC - 37

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTDIAMOND SHAMROCK REF & MKTG CO 103617 3305 E GRAND AVE, DALLASGASOLINE 5/21/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 104025 631 W PLEASANT RUN, LANCASTERGASOLINE 7/31/92 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO106722 820 N FITZHUGH, DALLASGASOLINE 10/28/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 106806 1010 LAVON DR, GARLANDGASOLINE 3/13/93 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 108268 4810 MAPLE AVE, DALLASGASOLINE 6/9/94 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 109085 11111 KINGSLEY RD, DALLASGASOLINE 1/17/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109086 2403 N FITZHUGH, DALLASGASOLINE 1/25/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109087 4018 ROSS AVE, DALLASGASOLINE 1/25/94 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 109088 9206 BRUTON RD, DALLASGASOLINE 1/25/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109161 406 W CAMP WISDOM RD, DUNCANVILLEGASOLINE 1/17/95 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO109706 3341 TOWN E BLVD, MESQUITEGASOLINE 7/17/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 111339 1915 S STORY RD, IRVINGGASOLINE 7/2/96 2 , 2A E,QDOBBS INTERNATIONAL SERV INC 101518 3301 S 22ND AVE, DFW AIRPORTGASOLINE 11/15/91 2 , 2A E,QDOLLAR MART WHOLSALE 104686 1433 S BELTLINE, MESQUITEGASOLINE 9/12/92 2 , 2A E,QDON DELO 091303 237 CENTERVILLE RD, GARLANDUNKNOWN 5/14/87 2 , 2A E,QDON ELLIOTT COMPANY 093966 3011 GULDEN LN, DALLASDIESEL 10/25/89 2A , 1A E,QDOUG BAKER 102839 401 E PIONEER DR, IRVINGGASOLINE 4/29/92 2A , 1A E,QDR PEPPER BOTTLING CO OF TEXAS 107632 2304 CENTURY CENTER BLVD, DALLASDIESEL 6/30/93 2 , 2A E,QDRESSER INDUSTRIES INC 092054 1501 AKARD ST, DALLASGASOLINE 6/30/88 2 , 5 E,QDUNLAP SWAIN 093692 9131 SKILLMAN ST, DALLASGASOLINE 9/5/89 2 , 6 E,QDUNLAP SWAIN 107796 6801 PRESTON, UNIVERSITY PARKGASOLINE 12/23/93 2 , 2A E,Q* DUNLAP SWAIN108353 13556 PRESTON RD, DALLASGASOLINE 4/28/94 2 , 2A E,QEAGLE CREST FOODS INC 101991 1925 VALLEY VIEW LN, DALLASGASOLINE 9/30/91 2 , 2A E,QEBRAHIM, SAMI N 092988 10433 GARLAND RD, DALLASGASOLINE 4/18/89 2 , 5 E,QEDDIE HAGAR LTD 109495 6100 CEDAR SPRINGS, DALLASWASTE OIL 5/17/95 2A , 1A E,QEMPIRE IRON AND METAL 092947 1905 AKRON ST, DALLASGASOLINE 4/8/89 2 , 2A E,QENCOMP CORP 106445 4120 SCOTTSDALE DR, DALLASGASOLINE 3/29/93 2 , 2A E,QEPLEY B J 102140 2102 SINGLETON BLVD, DALLASGASOLINE 2/20/92 2 , 2A E,Q* ESTATE OF FRANCIS MUSSO112535 3418 MCKINNEY AVE, DALLASGASOLINE 8/11/97 2A , 1A E,Q* EVA KIRBY110520 7628 LAKE JUNE, DALLASUNKNOWN 3/8/96 2 , 2A E,QEXXON COMPANY USA 091047 8015 C F HAWN, DALLASGASOLINE 10/11/85 2 , 6 E,QEXXON COMPANY USA 091052 8302 ABRAMS RD, DALLASGASOLINE 10/25/85 2 , 6 E,QEXXON COMPANY USA 091078 3003 W LOOP 12, DALLASGASOLINE 5/1/86 2 , 6 E,QEXXON COMPANY USA 091232 3000 MOCKINGBIRD, DALLASUNKNOWN 1/23/87 2 , 2A E,QEXXON COMPANY USA 091367 12600 LAKE JUNE RD, BALCH SPRINGSGASOLINE 6/30/87 2 , 4 E,QEXXON COMPANY USA 091553 8020 IH-635, DALLASGASOLINE 12/4/87 2 , 2A E,QEXXON COMPANY USA 091571 7035 SNIDER PLZ, DALLASGASOLINE 12/14/87 2 , 4 E,QEXXON COMPANY USA 091585 9998 MARSH LN, DALLASGASOLINE 11/18/87 2 , 6 E,QEXXON COMPANY USA 091674 3040 W MOCKINGBIRD LN, DALLASGASOLINE 11/1/87 2 , 4 E,QEXXON COMPANY USA 091936 3202 S LANCASTER RD, DALLASGASOLINE 5/19/88 2 , 2A E,QEXXON COMPANY USA 092507 2075 LOOP 12, DALLASGASOLINE 11/4/88 2A , 6 E,QEXXON COMPANY USA 092664 3802 GASTON AVE, DALLASGASOLINE 2/20/89 2 , 4 E,QEXXON COMPANY USA 092683 7828 SPRING VALLEY RD, DALLASGASOLINE 1/17/89 2 , 4 E,QEXXON COMPANY USA 092684 1010 E 8TH ST, DALLASGASOLINE 2/22/89 2 , 6 E,QEXXON COMPANY USA 093254 2431 W WALNUT ST, GARLANDGASOLINE 6/21/89 2 , 6 E,QEXXON COMPANY USA 093712 12330 GREENVILLE AVE, DALLASGASOLINE 8/31/89 2 , 4 E,QEXXON COMPANY USA 094230 13115 HARRY HINES BLVD, FARMERS BRANCH UNKNOWN 12/19/89 2A , 6 E,QEXXON COMPANY USA 094555 2242 S ZANG BLVD, DALLASGASOLINE 12/11/89 2 , 4 E,QTNRCC - 38

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPST* EXXON COMPANY USA095029 105 S HWY 75, WILMERGASOLINE 2/20/90 2A , 1A E,QEXXON COMPANY USA 095629 1901 E HWY 356 HWY, IRVINGGASOLINE 4/27/90 2 , 4 E,QEXXON COMPANY USA 098347 7700 N CENTRAL EXPY, DALLASGASOLINE 3/22/91 2 , 6 E,QEXXON COMPANY USA 098959 940 N CENTRAL EXPY, RICHARDSONGASOLINE 2/6/91 2 , 6 E,QEXXON COMPANY USA 099044 500 LOOKOUT DR, RICHARDSONGASOLINE, DIESEL, WASTE OIL 12/13/90 2 , 6 E,QEXXON COMPANY USA 099136 1501 NW 19TH ST, GRAND PRAIRIEGASOLINE 5/21/91 2 , 6 E,QEXXON COMPANY USA 099382 3927 OAK LAWN AVE, DALLASUNKNOWN 6/11/91 2 , 2A E,QEXXON COMPANY USA 099769 3301 W DAVIS, DALLASGASOLINE 7/11/91 2 , 6 E,QEXXON COMPANY USA 100192 9222 W CARPENTER FWY, DALLASGASOLINE 8/31/91 2 , 2A E,QEXXON COMPANY USA 100287 1201 E AIRPORT FWY, IRVINGGASOLINE, WASTE OIL, CHEMICAL 6/19/91 2A , 6 E,QEXXON COMPANY USA 100441 1400 E CAMPBELL DR, RICHARDSONGASOLINE 10/3/91 2 , 6 E,QEXXON COMPANY USA 102003 8002 FERGUSON RD, DALLASUNKNOWN 7/22/91 2 , 2A E,QEXXON COMPANY USA 102055 2722 N FITZHUGH AVE, DALLASUNKNOWN 2/18/92 2 , 6 E,QEXXON COMPANY USA 102194 12004 WEBB CHAPEL RD, FARMERS BRANCH GASOLINE, DIESEL 3/2/92 2 , 6 E,QEXXON COMPANY USA 102308 2904 COMMERCE ST, DALLASUNKNOWN 4/25/91 2A , 6 E,QEXXON COMPANY USA 104071 6744 TWIN HILLS, DALLASGASOLINE 7/31/92 2 , 6 E,QEXXON COMPANY USA 104465 8201 IH-35, DALLASGASOLINE 8/28/92 2 , 6 E,QEXXON COMPANY USA 104776 10140 E LOOP 12, DALLASWASTE OIL 9/29/92 2 , 6 E,QEXXON COMPANY USA 104998 9000 LAKE JUNE RD, DALLASUNKNOWN 12/15/91 2 , 6 E,QEXXON COMPANY USA 105110 502 S GARLAND RD, GARLANDGASOLINE 9/16/92 2 , 6 E,QEXXON COMPANY USA 105368 3203 S HAMPTON RD, DALLASGASOLINE 7/28/92 2 , 2A E,Q* EXXON COMPANY USA106496 3636 FOREST LN, DALLASGASOLINE 4/13/93 2 , 2A E,Q* EXXON COMPANY USA106640 11925 JOSEY LN, FARMERS BRANCHWASTE OIL 9/20/92 2 , 2A E,QEXXON COMPANY USA 106681 8602 GARLAND RD, DALLASGASOLINE 6/17/93 2 , 2A E,QEXXON COMPANY USA 106869 802 E HWY 303, GRAND PRAIRIEGASOLINE 2/12/93 2 , 2A E,QEXXON COMPANY USA 107608 7101 LAKE JUNE RD, DALLASGASOLINE 10/27/93 2 , 6 E,QEXXON COMPANY USA 108067 9701 N CENTRAL EXWY, DALLASGASOLINE 3/17/94 2 , 6 E,QEXXON COMPANY USA 108297 15707 HILLCREST, DALLASGASOLINE 10/22/93 2 , 6 E,QEXXON COMPANY USA 108602 3070 N JOSEY LN, CARROLLTONGASOLINE 9/14/94 2 , 2A E,QEXXON COMPANY USA 108678 9115 SCYENE RD, DALLASGASOLINE 1/27/94 2 , 2A E,QEXXON COMPANY USA 108884 1821 W TARRANT RD, GRAND PRAIRIEGASOLINE 2/14/92 2 , 6 E,QEXXON COMPANY USA 108888 2150 E BELTLINE, RICHARDSONGASOLINE 11/18/94 2 , 6 E,QEXXON COMPANY USA 109104 4191 BELTLINE RD, ADDISONGASOLINE 10/3/94 2 , 6 E,QEXXON COMPANY USA 109210 403 W IRVING BLVD, IRVINGGASOLINE 2/28/95 2A , 1A E,Q* EXXON COMPANY USA109648 7650 CAMPBELL, DALLASGASOLINE 11/2/94 2 , 2A E,QEXXON COMPANY USA 109975 11748 N CENTRAL EXWY, DALLASGASOLINE 3/27/95 2 , 6 E,QEXXON COMPANY USA 110683 14106 N DALLAS PKWY, DALLASGASOLINE 3/18/96 2 , 2A E,QEXXON COMPANY USA 110730 9049 FOREST LN, DALLASGASOLINE 3/25/96 1B , 1A E,Q* EXXON COMPANY USA110804 2052 FORT WORTH AVE, DALLASUNKNOWN 4/18/96 1B , 1A E,QEXXON COMPANY USA 110810 11709 SEAGOVILLE RD, BALCH SPRINGSGASOLINE 4/11/96 2 , 2A E,Q* EXXON COMPANY USA110812 3501 SIMPSON STUART RD, DALLASUNKNOWN 4/16/96 2 , 2A E,Q* EXXON COMPANY USA110814 13033 COIT RD, DALLASGASOLINE 3/29/96 2 , 2A E,Q* EXXON COMPANY USA110829 501 N GALLOWAY DR, MESQUITEWASTE OIL 9/16/96 2 , 2A E,QEXXON COMPANY USA 110850 104 S IH-45, HUTCHINSGASOLINE 4/15/96 2 , 2A E,Q* EXXON COMPANY USA110852 5748 LIVE OAK, DALLASGASOLINE 4/17/96 1B , 1A E,Q* EXXON COMPANY USA110907 3082 FOREST LN, DALLASGASOLINE 4/18/96 2 , 2A E,Q* EXXON COMPANY USA110988 4490 W ILLINOIS, DALLASGASOLINE 5/6/96 1B , 1A E,Q* EXXON COMPANY USA112317 3306 IRVING BLVD, DALLASUNKNOWN 5/15/97 1B , 1A E,QTNRCC - 39

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPST* EXXON COMPANY USA112331 498 W IH 30, GARLANDUNKNOWN 5/27/97 1B , 1A E,QFDIC 093496 920 BELT LINE RD, COPPELLGASOLINE 7/17/89 2 , 2A E,QFDIC 096279 2409 VALWOOD PKWY, DALLASGASOLINE 12/11/89 2 , 2A E,QFDIC 100589 3751 N STORY RD, IRVINGGASOLINE 11/30/90 2 , 2A E,QFDIC 102177 1500 JACKSON, DALLASDIESEL 3/9/92 2 , 2A E,QFDIC 106599 W CORBIN ST, DALLASUNKNOWN 11/30/92 2A , 1A E,QFDIC 108849 2222 INWOOD RD, DALLASGASOLINE 12/1/92 2A , 1A E,QFDIC C/O AMRESCO MGMT INC 096023 CEDAR SPRINGS RD, DALLASDIESEL 6/21/90 2 , 4 E,Q* FEDERAL EXPRESS CORP112129 2825 W KINGSLEY RD, GARLANDGASOLINE 1/29/97 2A , 6 E,QFEDERAL RESERVE BANK OF DALLAS 098449 2200 N PEARL ST, DALLASGASOLINE 4/9/90 2 , 6 E,QFIESTA MART INC 094762 9751 WEBBS CHAPEL RD, DALLASGASOLINE 1/8/90 2A , 2A E,Q* FIESTA MART INC112156 5334 ROSS AVE, DALLASUNKNOWN 3/5/97 2 , 6 E,QFINA OIL & CHEMICAL CO 091538 1525 INWOOD RD, DALLASGASOLINE 11/1/87 2 , 2A E,QFINA OIL & CHEMICAL CO 091604 1901 N STAR RD, GARLANDGASOLINE 11/18/84 2 , 2A E,QFINA OIL & CHEMICAL CO 093673 11107 N CENTRAL EXPY, DALLASGASOLINE 9/21/89 2 , 6 E,QFINA OIL & CHEMICAL CO 095339 2604 S LANCASTER, DALLASGASOLINE 8/17/89 2 , 2A E,QFINA OIL & CHEMICAL CO 100158 123 GREENVILLE, ALLENGASOLINE 8/22/91 2 , 6 E,QFINA OIL & CHEMICAL CO 105656 3207 LOOP 12, DALLASGASOLINE 12/29/92 2 , 6 E,QFINA OIL & CHEMICAL CO 111818 3501 W WALNUT, GARLANDGASOLINE 10/22/96 2A , 6 E,QFINA OIL & CHEMICAL CO 111909 3405 S BROADWAY BLVD, GARLANDGASOLINE, DIESEL 11/15/96 2 , 2A E,QFIRST AMERICAN BANK 106782 2320 E UNION RD, IRVINGDIESEL 6/7/93 2 , 6 E,Q* FISCA OIL CO INC107037 301 S CENTRAL EXPY, RICHARDSONGASOLINE 3/18/93 2 , 5 E,QFLINT INK CORP 094610 3120 HALIFAX ST, DALLASCHEMICAL 10/10/89 2 , 2A E,QFRANK PRINCE 095652 1001 N HALL ST, DALLASGASOLINE 4/12/90 2 , 6 E,QFREEWAY READY MIX INC 103263 1400 VALLEY VIEW, FARMERS BRANCHDIESEL 5/1/87 2 , 6 E,QG B SELF SERVE INC 110229 8320 SCYENE RD, DALLASGASOLINE 4/28/95 2 , 2A E,Q* G B SELF SERVE INC112237 1501 PEACHTREE RD, BALCH SPRINGSGASOLINE 4/2/97 1B , 1A E,QG H HENSLEY 100981 2108 JOE FIELD RD, DALLASDIESEL 3/12/91 2 , 6 E,Q* G MCMURREY EST C/O M F CORTIMI110795 2701 GASTON AVE, DALLASGASOLINE, DIESEL 4/11/96 2 , 2A E,QGANTGES DON 102760 2005 S GREAT SOUTHWEST PKWY, GRAND PRAIRIE DIESEL 3/10/92 2A , 1A E,QGARNET CORP 109920 4242 IRVING BLVD, DALLASDIESEL 9/5/95 2A , 1A E,Q* GENERAL MOTORS CORP099695 3377 EDWARDS, DALLASGASOLINE 12/15/90 2 , 2A E,QGENICO DISTRIBUTORS INC 111134 7047 BRUTON RD, DALLASUNKNOWN 6/12/96 2 , 2A E,Q* GEORGE & NICHOLAS DIXIE112189 1601 MARKET CENTER BLVD, DALLASUNKNOWN 3/18/97 1B , 1A E,QGHOLBM (GLEN) MOJAHED 109282 12 ARAPHAO VILLAGE, RICHARDSONGASOLINE 5/27/94 2A , 6 E,Q* GILBERT SCOTT107697 3218 E MAIN, GRAND PRAIRIEGASOLINE 6/10/93 5B , 2A E,Q* GLITSCH INC112389 4900 SINGLETON, DALLASGASOLINE 6/11/97 1B , 1A E,QGMAC/GM REMEDIATION TEAM 095213 2250 MANANA DR, DALLASGASOLINE, WASTE OIL 3/12/90 2 , 6 E,QGNB INC 098730 1880 VALLEY VIEW LN, FARMERS BRANCHGASOLINE, DIESEL 3/27/91 2A , 6 E,Q* GOOD LUCK OIL C/O WILEMON PROP112117 2621 ROSS AVE, DALLASUNKNOWN 2/18/97 2 , 6 E,QGOOD LUCK OIL CO 104505 2908 E 11TH ST, DALLASGASOLINE 9/2/92 2 , 2A E,Q* GOOD LUCK OIL CO112617 4515 W MOCKINGBIRD, DALLASGASOLINE 9/11/97 1B , 1A E,Q* GOOD LUCK OIL CO112619 1718 S EWING, DALLASGASOLINE 9/11/97 1B , 1A E,QGREYHOUND LINES INC 092651 1100 S LAMAR ST, DALLASDIESEL 1/27/89 2 , 2A E,QGTE 111406 500 E CARPENTER FWY, DALLASHYDR FLUID 7/23/96 1B , 1A E,QGUARANTY FEDERAL BANK 098403 2900 S LAMAR, DALLASGASOLINE 3/28/91 5B , 1A E,QHARRIS OIL COMPANY 091077 HWY 67, CEDAR HILLGASOLINE 4/25/86 2 , 6 E,QHAYES LEASING CO INC 091877 DFW AIRPORT, DFW AIRPORTDIESEL 4/26/88 2 , 2A E,QTNRCC - 40

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTHERTZ CORP 092381 2936 IRVING BLVD, DALLASGASOLINE 11/28/88 2 , 4 E,Q* HERTZ CORP096455 7212 CEDAR SPRINGS, DALLASGASOLINE 8/10/90 2 , 2A E,Q* HERTZ CORP098686 INT'L PKWY, DFW AIRPORTUNKNOWN 4/17/91 2 , 2A E,QHICKMAN PAINTING CO INC 109735 9759 BROCKBANK, DALLASGASOLINE 5/23/95 2A , 6 E,Q* HOODA CORP INC112567 4125 W AIRPORT FWY, IRVINGUNKNOWN 8/28/97 2 , 6 E,QHUNSAKER TRUCK LEASE INC 096696 11476 HARRY HINES BLVD, DALLASGASOLINE, DIESEL 9/7/90 2A , 1A E,QINTERCONTINENTAL MFG CO 096016 1502 N 5TH ST, GARLANDUNKNOWN 5/31/90 2A , 2A E,Q* JACK IN THE BOX104962 335 S GARLAND RD, GARLANDGASOLINE 10/13/92 2 , 2A E,QJIFFY LUBE INTERNATIONAL INC 109525 2645 S BUCKNER BLVD, DALLASWASTE OIL, GASOLINE 5/19/95 2A , 1A E,QJOE JONES 104622 203 W CAMP WISDOM RD, DALLASWASTE OIL 9/15/92 2 , 2A E,QJOHANSEN REAL ESTATE 108633 3151 HALIFAX, DALLASGASOLINE, DIESEL 9/19/94 2 , 2A E,QJOHN BENDA INVESTMENTS 108775 10025 HARRY HINES BLVD, DALLASGASOLINE 9/7/94 2 , 2A E,QJONES BLAIR PAINT CO 094655 2728 EMPIRE CENTRAL, DALLASCHEMICAL 1/11/90 2 , 2A E,QJONES SID 105288 13317 KLEBERG, DALLASGASOLINE 10/30/92 2 , 2A E,Q* JUDY IKELS106146 2330 HARDWICK, DALLASGASOLINE 2/11/93 2 , 2A E,QKAREN MERRILL 109306 10845 DENTON DR, DALLASGASOLINE 3/17/95 2A , 1A E,QKEN PRUITT BUICK 105618 3015 S GARLAND AVE, GARLANDWASTE OIL 12/18/92 2 , 6 E,QKEN THOMPSON 108205 1100 METROCREST, CARROLLTONGASOLINE 5/25/94 2 , 6 E,QKHALIL RAY KHALIL 102232 600 E SANDY LAKE RD, COPPELLGASOLINE 3/10/92 2 , 2A E,Q* KMART CORP112815 3200 W IRVING BLVD, IRVINGUNKNOWN 12/8/97 2 , 6 E,QKRAFT INC 093174 2340 FOREST LN, GARLANDDIESEL 6/1/89 2 , 6 E,QL & M FAST LANE CONV STORES 100299 906 E SHADY GROVE RD, IRVINGGASOLINE, DIESEL 9/5/91 2A , 2A E,Q* LE SON THANH109513 4441 LAWNVIEW, DALLASGASOLINE 5/12/95 2 , 2A E,Q* LELAND APPLEBAY112537 1700 W 10TH, DALLASGASOLINE 8/13/97 2 , 2A E,Q* LEND LEASE TRUCKS INC111082 4411 LESTON AVE, IRVINGUNKNOWN 6/4/96 1B , 1A E,Q* LEWIS HAROLD104581 BELTLINE RD, DALLASUNKNOWN 9/9/92 2 , 2A E,Q* LINKS CORP INC112681 825 W WINTERGREEN RD, DESOTOUNKNOWN 10/3/97 2 , 6 E,Q* LOBELLO WEST112678 8319 PRESTON RD, DALLASGASOLINE 9/29/97 1B , 1A E,QLONESTAR INSTITUTIONAL GROCERY 091978 2666 MANANA DR, DALLASGASOLINE 6/9/88 2 , 2A E,QLSI SERVICES CO 109677 1203 W PIONEER DR, IRVINGGASOLINE 4/24/95 1B , 1A E,QLSI SERVICES CO 109678 111 N STOREY, IRVINGGASOLINE 4/6/95 1B , 1A E,QLSI SERVICES CO 109679 604 W 6TH ST, IRVINGGASOLINE 4/24/95 1B , 1A E,QLTV AEROSPACE & DEFENSE 094669 9314 JEFFERSON, DALLASJET FUEL 1/15/90 2 , 2A E,QLTV AEROSPACE & DEFENSE 096164 9314 W JEFFERSON, DALLASDIESEL 6/28/90 2 , 2A E,QLTV AEROSPACE & DEFENSE 096165 9314 W JEFFERSON, DALLASDIESEL 6/29/90 2 , 2A E,QLTV AEROSPACE & DEFENSE 096708 14TH ST, GRAND PRAIRIEDIESEL 8/30/90 2A , 6 E,QLTV AEROSPACE & DEFENSE 097963 9314 W JEFFERSON, DALLASJET FUEL 2/7/91 2 , 2A E,QLTV AEROSPACE & DEFENSE 102359 9314 W JEFFERSON, DALLASJET FUEL 3/18/92 2A , 1A E,QLTV AEROSPACE & DEFENSE 102362 9314 W JEFFERSON, DALLASJET FUEL 3/18/92 2A , 1A E,QMARIAN MURRAY 101987 1000 N INDUSTRIAL, DALLASGASOLINE 2/25/92 2 , 2A E,Q* MARK CONNELL112443 2601 MIDWAY, CARROLLTONUNKNOWN 6/30/97 1B , 1A E,QMATHEW RAJAN 093069 826 W SHADY GROVE, IRVINGGASOLINE 5/8/89 2A , 6 E,QMERCHANTS FAST MOTOR LINES 100302 10879 BEKAY RD, DALLASGASOLINE 7/16/91 2 , 6 E,Q* METHODIST HOSPITALS DALLAS098889 1303 N BECKLEY ST, DALLASGASOLINE 5/2/91 2 , 4 E,QMETRO PETROLEUM 091149 440 S BUCKNER BLVD, DALLASGASOLINE 11/5/86 5B , 2A E,Q* MICHAEL CHASTAIN W/NATIONS BK112050 14000 JOSEY LN, FARMERS BRANCHGASOLINE 11/5/96 2 , 2A E,Q* MIDWEST ENGINES112583 3502 E KIEST, DALLASUNKNOWN 9/2/97 2 , 2A E,QMOBIL OIL CORP 091034 10233 N CENTRAL EXPY, DALLASGASOLINE 8/1/85 2 , 4 E,QTNRCC - 41

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTMOBIL OIL CORP 091279 HWY 183, IRVINGGASOLINE 4/10/87 2 , 6 E,QMOBIL OIL CORP 091518 4802 GREENVILLE AVE, DALLASGASOLINE 10/23/87 2 , 6 E,QMOBIL OIL CORP 091742 701 W SPRING VALLEY RD, RICHARDSONGASOLINE 11/11/87 2A , 6 E,QMOBIL OIL CORP 092070 7038 SNIDER PLZ, DALLASGASOLINE 6/16/88 2 , 6 E,QMOBIL OIL CORP 092107 3732 MAPLE AVE, DALLASWASTE OIL, GASOLINE 6/1/88 2 , 4 E,QMOBIL OIL CORP 092164 11770 FERGUSON RD, DALLASGASOLINE 9/1/88 2 , 6 E,QMOBIL OIL CORP 092165 1701 SKILLMAN ST, DALLASGASOLINE 8/19/88 2 , 4 E,QMOBIL OIL CORP 092253 5003 N O'CONNER RD, IRVINGGASOLINE 9/25/88 2 , 2A E,QMOBIL OIL CORP 092305 8421 PRESTON RD, DALLASGASOLINE 10/13/88 2 , 6 E,QMOBIL OIL CORP 092342 10811 WEBBS CHAPEL RD, DALLASGASOLINE 9/27/88 2A , 6 E,QMOBIL OIL CORP 092350 4600 LEMMON AVE, DALLASGASOLINE 11/17/88 2 , 2A E,QMOBIL OIL CORP 092614 2906 LOOP 12, DALLASGASOLINE 2/15/89 2 , 2A E,QMOBIL OIL CORP 092742 5025 LANCASTER, DALLASGASOLINE 3/8/89 2 , 6 E,QMOBIL OIL CORP 093089 5909 S HAMPTON RD, DALLASGASOLINE 5/17/89 2 , 6 E,QMOBIL OIL CORP 093428 5711 E GRAND, DALLASUNKNOWN 10/25/88 2 , 5 E,QMOBIL OIL CORP 093527 507 W ARAPAHO RD, RICHARDSONGASOLINE 1/1/86 2 , 6 E,QMOBIL OIL CORP 094150 13211 IH-35, DALLASGASOLINE 10/18/89 2 , 3 E,QMOBIL OIL CORP 094520 9790 WALNUT LN, DALLASGASOLINE 1/5/90 2 , 4 E,QMOBIL OIL CORP 094582 4423 LIVE OAK, DALLASGASOLINE 12/6/89 2 , 4 E,QMOBIL OIL CORP 095002 8550 PLANO RD, DALLASGASOLINE 11/4/89 2A , 2A E,QMOBIL OIL CORP 095502 2213 OATES DR, MESQUITEHYDR FLUID 4/11/91 1B , 1A E,QMOBIL OIL CORP 097218 2440 WALNUT HILL LN, DALLASGASOLINE, WASTE OIL 3/16/90 2 , 6 E,QMOBIL OIL CORP 097681 1401 E BELT LINE RD, RICHARDSONGASOLINE 1/8/91 2 , 6 E,QMOBIL OIL CORP 097765 3439 OAK LAWN, DALLASGASOLINE 1/3/91 2 , 2A E,QMOBIL OIL CORP 098566 9100 FOREST LN, DALLASGASOLINE 4/3/91 2 , 6 E,QMOBIL OIL CORP 099687 2904 VALLEY VIEW LN, FARMERS BRANCHGASOLINE 7/12/91 2A , 1A E,QMOBIL OIL CORP 100130 3100 W MOCKINGBIRD, DALLASGASOLINE 9/9/91 2 , 2A E,QMOBIL OIL CORP 103403 1405 W BUCKINGHAM, GARLANDGASOLINE 6/10/92 2 , 6 E,QMOBIL OIL CORP 103547 1028 W BRUTON RD, MESQUITEGASOLINE 4/29/92 2 , 2A E,QMOBIL OIL CORP 103695 13010 ABRAMS, DALLASGASOLINE 7/1/91 2 , 6 E,QMOBIL OIL CORP 104005 3036 BROADWAY @ CENTERVIL, GARLANDGASOLINE 10/4/90 2 , 6 E,QMOBIL OIL CORP 104188 1504 S WESTMORELAND, DALLASGASOLINE 5/6/92 2 , 6 E,QMOBIL OIL CORP 105139 702 LOOP 12, DALLASGASOLINE 12/4/91 2A , 6 E,QMOBIL OIL CORP 105739 11800 PRESTON RD, DALLASGASOLINE 11/2/92 2 , 2A E,QMOBIL OIL CORP 106650 9351 IH-635 FWY, DALLASGASOLINE 5/5/93 2 , 2A E,QMOBIL OIL CORP 107966 5400 PRESTON RD, HIGHLAND PARKGASOLINE 12/20/93 2A , 1A E,QMOBIL OIL CORP 109186 1900 BELTLINE RD, CARROLLTONGASOLINE 2/22/95 2A , 1A E,QMOBIL OIL CORP 109738 2135 NORTHWEST HWY, GARLANDGASOLINE 7/17/95 2 , 6 E,QMOBIL OIL CORP 109776 2400 E LEDBETTER, DALLASWASTE OIL 6/20/95 1B , 1A E,QMOBIL OIL CORP 111955 5655 W LOVERS LN, DALLASUNKNOWN 6/13/96 2A , 6 E,Q* MOBIL OIL CORP112057 1360 S PLANO RD, RICHARDSONUNKNOWN 1/15/97 1B , 1A E,Q* MOBIL OIL CORPORATION112061 2717 CUSTER, RICHARDSONUNKNOWN 1/17/97 1B , 1A E,QMOBIL RESEARCH & DEV 101908 13777 MIDWAY RD, FARMERS BRANCHGASOLINE 12/2/91 2 , 6 E,Q* MOJIRI ENTERPRISE INC112148 2333 OATES DR, MESQUITEUNKNOWN 3/3/97 2 , 2A E,QMONEY OIL CO INC 100007 2122 W LOOP 12, DALLASGASOLINE, DIESEL 8/12/91 2A , 1A E,Q* MONEY OIL CO INC111235 8506 DENTON DR, DALLASGASOLINE 6/17/96 2 , 2A E,Q* MONTGOMERY WARD & CO INC110780 100 NORTHTOWN MALL, DALLASUNKNOWN 4/9/96 2 , 2A E,QMOODY-DAY, INC. 095209 2323 IRVING BLVD, DALLASGASOLINE 1/17/90 2 , 6 E,QTNRCC - 42

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTMOUNTASIA ENTERTAINMENT INTL 111515 11130 MALIBU DR, DALLASGASOLINE 8/1/96 1B , 1A E,QMOUNTASIA ENTERTAINMENT INTL 111609 11150 MALIBU DR, DALLASOTHER 9/12/96 1B , 1A E,QMRS BAIRDS BAKERY 096573 5230 E MOCKINGBIRD LN, DALLASGASOLINE, DIESEL 8/9/90 2 , 2A E,QMRS L K BELL 107759 1321 13TH ST, GARLANDGASOLINE 7/29/93 2 , 6 E,Q* MUTAWE & ALBANNA ENTERPRISES105051 1949 E CENTERVILLE RD, GARLANDDIESEL, GASOLINE 10/21/92 2 , 2A E,QNATIONAL CAR RENTAL SYSTEM 091398 DFW AIRPORT, DFW AIRPORTGASOLINE 3/6/87 2A , 6 E,Q* NATIONAL CONVENIENCE BANKRUPT112153 9709 DENTON DR, DALLASUNKNOWN 3/5/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112413 520 W 6TH ST, IRVINGGASOLINE 6/17/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112414 2001 W NORTHWEST HWY, DALLASGASOLINE 6/17/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112416 800 N BELTLINE RD, IRVINGGASOLINE 6/17/97 5B , 1A E,QNATIONAL CONVENIENCE STORES 106800 105 NW 23RD, GRAND PRAIRIEGASOLINE 6/11/93 5B , 1A E,QNATIONAL LINEN SERVICE 104591 620 YORKTOWN, DALLASGASOLINE, DIESEL 9/14/92 2 , 2A E,QNATIONS BANK OF TEXAS 101853 3010 KNOX ST, DALLASGASOLINE, WASTE OIL 8/19/91 2A , 6 E,Q* NORTHRUP GRUMMEN112856 9314 W JEFFERSON, DALLASDIESEL 12/17/97 1B , 1A E,Q* NORTHTOWN MALL REALTY CORP110779 3101 FOREST LN, DALLASUNKNOWN 4/9/96 1B , 1A E,QO B A INC 098779 9723 HARRY HINES BLVD, DALLASGASOLINE, WASTE OIL 5/1/91 2 , 5 E,QOHIO NATIONAL LIFE INSURANCE 099837 11220 GEMINI LN, DALLASGASOLINE 7/22/91 2 , 2A E,QONE STOP FOOD STORES 111667 5311 BOYD BLVD, ROWLETTGASOLINE, DIESEL 8/22/96 2 , 2A E,QONE STOP FOOD STORES 111942 1205 TRINITY MILLS, CARROLLTONGASOLINE, DIESEL 11/12/96 2 , 2A E,QONE STOP FOOD STORES INC 091885 5444 HWY 78, SACHSEUNKNOWN 4/22/88 2 , 4 E,QONE STOP FOOD STORES INC 091938 5314 2ND AVE, DALLASGASOLINE 6/5/88 2A , 2A E,QONE STOP FOOD STORES INC 099652 3725 CARRIER PKWY, GRAND PRAIRIEGASOLINE 7/11/91 2 , 2A E,QONE STOP FOOD STORES INC 101855 867 DUNCANVILLE RD, DUNCANVILLEGASOLINE, DIESEL 2/13/92 2A , 6 E,QONE STOP FOOD STORES INC 108983 1422 ACTON, DUNCANVILLEGASOLINE 12/29/94 2A , 1A E,QORKIN PEST CONTROL CO 102862 6234 PEELER, DALLASGASOLINE 4/3/90 2 , 2A E,QOVERNITE TRANSPORTATION 093265 2300 TIME ST, IRVINGDIESEL 7/13/89 2 , 2A E,QOVERNITE TRANSPORTATION 096425 2300 TIME ST, IRVINGDIESEL 7/20/90 2 , 2A E,QPACIFIC RETAIL TRUST 109015 800 BLK ARAPAHO RD, RICHARDSONGASOLINE 5/1/94 2 , 6 E,QPARK PLACE JEEP/EAGLE LAND CO 108996 4801 LEMMON AVE, DALLASGASOLINE 11/8/94 2A , 6 E,QPARK PLACE MOTORCARS 110002 4023 OAK LAWN, DALLASGASOLINE, DIESEL, WASTE OIL 10/31/95 2 , 6 E,QPARKLAND MEMORIAL HOSPITAL 102101 2119 LOFLAND ST, DALLASDIESEL 2/18/92 2A , 6 E,QPARROTT OIL CORP 102400 14345 DALLAS PKWY, ADDISONGASOLINE 3/27/92 5B , 1A E,Q* PATTERSON BROTHERS MEAT CO105122 4000 ASH LN, DALLASGASOLINE 10/27/92 2 , 5 E,QPENSKE TRUCK LEASING 097618 2876 MARKET ST, GARLANDWASTE OIL 3/27/90 2 , 2A E,Q* PENSKE TRUCK LEASING CO095210 4335 IRVING BLVD, DALLASDIESEL 2/15/90 2 , 2A E,Q* PENSKE TRUCK LEASING CO108405 11528 HARRY HINES BLVD, DALLASDIESEL 11/4/93 2 , 2A E,Q* PENSKE TRUCK LEASING COMPANY095802 2605 OAKLAND AVE, GARLANDGASOLINE, DIESEL 10/15/89 2 , 2A E,QPEP BOYS 104281 2992 FOREST LN, DALLASWASTE OIL 8/14/92 2A , 1A E,QPEPSI CO 109640 1411 CENTURY DR, CARROLLTONDIESEL 6/26/95 1B , 1A E,QPEPSI COLA BOTTLING CO 092082 4532 HWY 67, MESQUITEDIESEL 8/9/88 2 , 4 E,Q* PETRO CO112188 1114 W OAKDALE, GRAND PRAIRIEUNKNOWN 3/18/97 2 , 2A E,QPHILLIPS 66 CO 098380 4201 W JEFFERSON, DALLASGASOLINE 12/17/90 2A , 6 E,QPHILLIPS 66 CO 098483 4646 BROADWAY, GARLANDGASOLINE 3/31/91 2 , 2A E,QPHILLIPS 66 CO 106870 726 E HWY 303, GRAND PRAIRIEGASOLINE 10/22/92 2 , 6 E,QPHILLIPS 66 CO 110891 9203 BRUTON RD, DALLASGASOLINE 4/25/96 2 , 2A E,Q* PHILLIPS PETORLEUM CO112859 5526 E R L THORNTON, DALLASGASOLINE 12/4/97 1B , 1A E,Q* POLY AMERICA112527 2000 W MARSHALL, GRAND PRAIRIEUNKNOWN 8/12/97 2 , 5 E,QPOWERS OIL CO 108259 10449 DENTON DR, DALLASGASOLINE 6/10/94 2 , 6 E,QTNRCC - 43

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTPRINTPACK INC 092842 2006 S GREAT SOUTHWEST PKWY, GRAND PRAIRIE CHEMICAL 4/19/89 2 , 4 E,Q* RACETRAC112867 1716 W FRANKFORD RD, CARROLLTONGASOLINE 12/22/97 2 , 2A E,QRADER HOMER 101102 5220 HARRY HINES BLVD, DALLASGASOLINE, DIESEL 12/5/91 2 , 2A E,QRAGLAND AND HORTON TRUST 109167 2901 COMMERCE, DALLASGASOLINE 9/22/92 2A , 1A E,Q* REAL ESTATE SER NATIONS BANK112051 1925 N GALLOWAY, ESTATEGASOLINE 11/20/96 1B , 1A E,QREALTY ALLIANCE OF TEXAS LTD 096421 2710 S LAMAR ST, DALLASGASOLINE, DIESEL 6/6/90 2 , 2A E,QREAVES HICKEY 091625 508 W AVE D, GARLANDGASOLINE 11/15/87 2A , 1A E,Q* REDI PACKAGING106707 3061 W SANER AVE, DALLASDIESEL 10/27/91 2 , 2A E,QRESOLUTION TRUST CORP 099607 IH--35, DALLASDIESEL 6/17/91 2 , 2A E,QRICHARD M. & MONIQUE F. BYRON 101489 9525 SKILLMAN, DALLASDIESEL 12/9/91 2 , 2A E,QROADSIDE STATIONS INC 091111 1204 N KAUFMAN, SEAGOVILLEGASOLINE 8/20/86 5B , 2A E,QROADWAY EXPRESS INC 091087 200 N BELT LINE RD, IRVINGDIESEL 6/13/86 2 , 2A E,QROCK TENN CO 107188 1120 E CLARENDON, DALLASGASOLINE 8/20/93 2A , 1A E,QRODGER MEIER CADILLAC 094892 4707 IH-635, FARMERS BRANCHGASOLINE, DIESEL 2/15/90 2A , 6 E,Q* ROLLINS LEASING CORP107756 2340 LOMBARDY, DALLASDIESEL 1/28/94 2A , 1A E,Q* ROY MARCOS112564 12900 HARRY HINES, DALLASGASOLINE 7/31/97 1B , 1A E,QRYDER TRUCK RENTAL INC 093135 2130 HIGHTOWER DR, GARLANDDIESEL 5/1/89 2 , 5 E,QRYDER TRUCK RENTAL INC 093288 3200 HALIFAX ST, DALLASDIESEL 6/14/89 2A , 6 E,Q* RYDER TRUCK RENTAL INC106457 3200 HALIFAX ST, DALLASOTHER 3/10/93 2A , 1A E,Q* S & T PLUMBING111281 804 W SHADY GROVE, IRVINGGASOLINE, DIESEL 7/10/96 2 , 2A E,Q* SABER REALTY112752 3797 FOREST, DALLASUNKNOWN 11/5/97 1B , 1A E,Q* SEARS & ROEBUCK112146 2270 VALLEY VIEW, DALLASUNKNOWN 3/3/97 1B , 1A E,QSEBASTIAN LACKEY 106311 2202 1/2 HWY 175, SEAGOVILLEDIESEL 3/10/93 2 , 6 E,QSECOND AVENUE PROPERTY 097081 305 EXPOSITION AVE, DALLASGASOLINE 8/22/90 2 , 6 E,QSHELL OIL 107802 2444 INWOOD, DALLASGASOLINE 4/23/92 2 , 2A E,Q* SHELL OIL112483 502 E CAMP WISDOM, DUNCANVILLEGASOLINE 7/28/97 1B , 1A E,QSHELL OIL CO 091634 7620 N CENTRAL EXPY, DALLASGASOLINE 1/20/88 2 , 6 E,Q* SHELL OIL CO091635 3021 BIG TOWN BLVD, MESQUITEGASOLINE 1/29/88 2 , 2A E,QSHELL OIL CO 092094 1230 E AIRPORT FWY, IRVINGGASOLINE 8/15/88 2 , 6 E,QSHELL OIL CO 092095 502 W IH-30, GARLANDGASOLINE 8/13/88 2 , 6 E,QSHELL OIL CO 093257 10405 N CENTRAL EXWY, DALLASUNKNOWN 7/13/89 2 , 2A E,QSHELL OIL CO 094043 2809 ROYAL LN, DALLASGASOLINE 9/15/89 2 , 6 E,QSHELL OIL CO 097841 1214 W CENTERVILLE, GARLANDGASOLINE 1/2/91 2 , 6 E,Q* SHELL OIL PRODUCTS CO112314 3701 BELTLINE, ADDISONUNKNOWN 5/13/97 2 , 6 E,Q* SHELL OIL PRODUCTS COMPANY112849 6463 NORTHWEST HWY, DALLASGASOLINE 12/11/97 1B , 1A E,QSOUTHBROOK ENTERPRISES LTD 110666 5030 GREENVILLE AVE, DALLASGASOLINE 2/23/96 1B , 6 E,QSOUTHLAND CORP 091084 3407 HUDNALL, DALLASGASOLINE 5/27/86 2 , 2A E,QSOUTHLAND CORP 091704 1812 CRESTRIDGE DR, MESQUITEGASOLINE 2/16/88 2 , 6 E,QSOUTHLAND CORP 091794 1114 N LANCASTER AVE, DALLASDIESEL 3/31/88 2 , 6 E,QSOUTHLAND CORP 092927 407 ROCHELLE, IRVINGGASOLINE 3/17/89 2 , 5 E,QSOUTHLAND CORP 092969 3801 TOWN E BLVD, MESQUITEGASOLINE 4/24/89 2A , 6 E,QSOUTHLAND CORP 093242 3000 PIONEER DR, IRVINGGASOLINE 7/10/89 2 , 6 E,QSOUTHLAND CORP 096983 7815 GARLAND RD, GARLANDGASOLINE 1/12/90 2 , 2A E,QSOUTHLAND CORP 097432 3021 BLACKBURN, DALLASGASOLINE 10/26/90 2A , 6 E,Q* SOUTHLAND CORP097467 302 N MARSALIS AVE, DALLASGASOLINE 12/6/90 2 , 2A E,QSOUTHLAND CORP 097497 6556 SKILLMAN ST, DALLASGASOLINE 12/11/90 2 , 2A E,QSOUTHLAND CORP 099095 8402 HARRY HINES BLVD, DALLASGASOLINE 4/12/91 2 , 2A E,QSOUTHLAND CORP 101557 2890 W LOOP 12, DALLASGASOLINE 1/16/92 2 , 2A E,QTNRCC - 44

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPST* SOUTHLAND CORP102230 902 GREAT SOUTHWEST PKWY, GRAND PRAIRIE GASOLINE 1/3/92 2 , 2A E,Q* SOUTHLAND CORP102526 3525 SUNNY VALE, DALLASGASOLINE 3/24/92 2 , 2A E,QSOUTHLAND CORP 106923 2720 N MACARTHUR, IRVINGGASOLINE 7/7/93 2 , 2A E,Q* SOUTHLAND CORP107843 8001 LEMMON AVE, DALLASAV-GAS 10/12/93 2 , 2A E,QSOUTHLAND CORP 108556 2818 MERRELL RD, DALLASGASOLINE 3/23/94 2 , 2A E,Q* SOUTHLAND CORP108866 111 N CARROLL AVE, DALLASGASOLINE 9/15/94 2 , 3 E,QSOUTHLAND CORP 109120 5406 HARRY HINES BLVD, DALLASGASOLINE 2/7/95 2 , 2A E,QSOUTHLAND CORP 109358 4950 COLUMBIA AVE, DALLASGASOLINE 1/16/95 2 , 2A E,Q* SOUTHLAND CORP110285 4539 TRAVIS ST, DALLASGASOLINE 1/15/96 2 , 2A E,Q* SOUTHLAND CORP110369 2020 N SHILOH RD, GARLANDGASOLINE 12/13/95 2 , 2A E,Q* SOUTHLAND CORP110578 7037 LAKE JUNE, DALLASUNKNOWN 3/20/96 2 , 2A E,Q* SOUTHLAND CORP110685 2223 S BECKLEY, DALLASUNKNOWN 3/28/96 2 , 2A E,Q* SOUTHLAND CORP110712 3702 N GREENVILLE, DALLASUNKNOWN 3/22/96 2 , 2A E,QSOUTHLAND CORP 110719 5220 E MOCKINGBIRD LN, DALLASGASOLINE 3/25/96 2 , 2A E,Q* SOUTHLAND CORP110721 211 S BECKLEY AVE, DALLASGASOLINE 3/25/96 2 , 2A E,Q* SOUTHLAND CORP110722 1023 S HAMPTON BLVD, DALLASGASOLINE 3/25/96 2 , 2A E,QSOUTHLAND CORP 110782 9750 KINGSLEY RD, DALLASGASOLINE 4/3/96 2 , 6 E,QSOUTHLAND CORP 110783 3733 W NORTHWEST HWY, DALLASGASOLINE 4/3/96 2 , 2A E,QSOUTHLAND CORP 110784 8240 ABRAMS, DALLASGASOLINE 4/3/96 2 , 6 E,QSOUTHLAND CORP 110825 4901 GUS THOMASSON RD, MESQUITEGASOLINE 4/10/96 2A , 6 E,Q* SOUTHLAND CORP110837 1803 N GALLOWAY, MESQUITEGASOLINE 4/8/96 2 , 2A E,Q* SOUTHLAND CORP110840 11437 SHILOH RD, DALLASGASOLINE 4/15/96 2 , 2A E,QSOUTHLAND CORP 110841 9798 FOREST LN, DALLASGASOLINE 4/15/96 2 , 6 E,Q* SOUTHLAND CORP112300 2515 INWOOD, DALLASGASOLINE 5/6/97 2 , 2A E,Q* SOUTHWESTERN BELL111776 2335 JETT RD, FARMERS BRANCHUNKNOWN 10/16/96 2 , 2A E,Q* SOUTHWESTERN BELL TELEPHONE111704 710 MERCURY AVE, DUNCANVILLEUNKNOWN 9/30/96 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 098077 301 GREENVILLE AVE, RICHARDSONWASTE OIL 2/21/91 2 , 2A E,QSOUTLAND CORPORATION 108906 10201 LAKE JUNE RD, DALLASGASOLINE 12/1/94 2 , 2A E,Q* SPEEDWAY SUPERAMERICA LLC094767 2602 IH-20, GRAND PRAIRIEGASOLINE 11/22/88 2A , 1A E,QSTAR ENTERPRISE 091039 13910 N CENTRAL EXPY, DALLASGASOLINE 8/14/85 2 , 2A E,QSTAR ENTERPRISE 091456 6119 E MOCKINGBIRD LN, DALLASGASOLINE 9/9/87 2A , 6 E,QSTAR ENTERPRISE 091572 2285 LOOP 12 HWY, DALLASGASOLINE 12/17/87 2A , 6 E,QSTAR ENTERPRISE 092209 11404 IH-35, DALLASGASOLINE 10/18/88 2 , 3 E,QSTAR ENTERPRISE 093171 5602 LOVERS LN, DALLASGASOLINE 5/30/89 2 , 6 E,QSTAR ENTERPRISE 093530 11231 N CENTRAL EXPY, DALLASGASOLINE, HYDR FLUID 8/23/89 2 , 6 E,QSTAR ENTERPRISE 094169 4404 W ILLINOIS AVE, DALLASGASOLINE 8/10/89 2 , 6 E,Q* STAR ENTERPRISE094216 1101 W AIRPORT FWY, IRVINGGASOLINE 10/2/89 2 , 4 E,QSTAR ENTERPRISE 096756 3100 FOREST LN, DALLASGASOLINE 9/14/90 2 , 6 E,QSTAR ENTERPRISE 097173 15707 COIT RD, DALLASGASOLINE 10/5/90 2 , 6 E,QSTAR ENTERPRISE 099018 9235 CARPENTER FWY, DALLASGASOLINE 4/17/92 2 , 6 E,QSTAR ENTERPRISE 099840 1453 DOWDY FERRY RD, HUTCHINSDIESEL 8/8/91 2 , 2A E,QSTAR ENTERPRISE 100235 2524 S LANCASTER, DALLASDIESEL 9/20/91 2 , 2A E,QSTAR ENTERPRISE 100250 820 S CENTRAL, RICHARDSONGASOLINE 9/10/91 2 , 6 E,QSTAR ENTERPRISE 100596 10763 PRESTON RD, DALLASGASOLINE 9/18/91 2 , 2A E,QSTAR ENTERPRISE 103516 4455 LOVERS LN, DALLASGASOLINE 6/18/92 2 , 2A E,QSTAR ENTERPRISE 103544 8200 IH--35, DALLASGASOLINE 3/19/92 2 , 2A E,QSTAR ENTERPRISE 103968 905 S ZANG BLVD, DALLASGASOLINE 7/24/92 2 , 6 E,QSTAR ENTERPRISE 104157 3303 W ILLINOIS, DALLASOTHER 4/28/92 2 , 2A E,QTNRCC - 45

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTSTAR ENTERPRISE 105108 633 CAMPBELL, RICHARDSONGASOLINE 10/26/92 1B , 1A E,QSTAR ENTERPRISE 105944 IH--45, DALLASGASOLINE 11/22/92 2A , 6 E,QSTAR ENTERPRISE 106739 7014 IH--35, DALLASDIESEL 5/4/93 2 , 2A E,QSTAR ENTERPRISE 106793 2112 OCONNOR RD, IRVINGUNKNOWN 3/3/93 2 , 6 E,QSTAR ENTERPRISE 107778 3021 BACHMAN DR, DALLASGASOLINE 8/20/93 2 , 2A E,QSTAR ENTERPRISE 107963 1946 E IH--35, CARROLLTONGASOLINE 3/11/93 2 , 2A E,QSTAR ENTERPRISE 107995 4707 S CENTRAL EXWY, DALLASGASOLINE 3/25/94 2 , 2A E,Q* STAR ENTERPRISE108497 221 E LEDBETTER, DALLASGASOLINE 5/24/94 2 , 2A E,QSTAR ENTERPRISE 109359 3021 MOCKINGBIRD, DALLASHYDR FLUID 4/6/95 2 , 2A E,QSTAR ENTERPRISE 109865 2801 MOTLEY, MESQUITEGASOLINE 11/1/94 2 , 6 E,Q* STAR ENTERPRISE112277 2001 N CENTRAL EXWY, RICHARDSONGASOLINE 4/25/97 1B , 1A E,Q* STAR ENTERPRISE112295 14801 COIT RD, DALLASGASOLINE 5/5/97 2 , 6 E,Q* STAR ENTERPRISE112312 2520 BELTLINE RD, CARROLLTONGASOLINE 5/5/97 2 , 2A E,Q* STAR ENTERPRISE112490 14040 COIT RD, DALLASGASOLINE 8/26/97 2 , 6 E,QSTONEBRIDGE MANAGEMENT 095955 1444 OAK LAWN AVE, DALLASDIESEL, WASTE OIL 6/22/90 2 , 2A E,QSTRASBURGER ENTERPRISES INC 104165 5931 IH--35, DALLASUNKNOWN 7/14/92 2A , 1A E,QSULLIVAN TRANSFER CO 097333 3817 IRVING BLVD, DALLASGASOLINE, DIESEL 11/26/90 2 , 2A E,Q* SUPERIOR UTILITIES099282 2464 MANANA, DALLASGASOLINE 3/6/91 2 , 2A E,QSWITZER PETROLEUM CO 091787 1310 W SPRING VALLEY, RICHARDSONGASOLINE 2/1/88 2 , 2A E,QSWITZER PETROLEUM CO 100447 4701 N GALLOWAY, MESQUITEGASOLINE 10/9/91 5B , 1A E,Q* SWITZER PETROLEUM INC111798 2010 S GOLIAD ST, ROCKWALLGASOLINE, DIESEL 10/9/96 2 , 2A E,QSWITZER PETROLEUM PRODUCTS INC 108575 640 N STORY RD, IRVINGGASOLINE 8/22/94 2 , 2A E,QSWORDS DEVELOPMENT CO 107405 3594 ELM GROVE, ROWLETTGASOLINE 10/15/93 2A , 1A E,QSYSCO FOOD SERVICES INC 091540 14330 GILLIS RD, FARMERS BRANCHGASOLINE 11/20/87 2 , 2A E,QT M T INC 111453 3502 S CARRIER PKWY, GRAND PRAIRIEGASOLINE 12/1/94 2 , 2A E,Q* T M T INC112164 7233 GASTON AVE, DALLASGASOLINE 3/4/97 2 , 2A E,Q* T M T INC112233 1140 HWY 67, MESQUITEGASOLINE 3/25/97 2 , 2A E,QTACO BELL 110400 5510 E MOCKINGBIRD, DALLASGASOLINE 8/1/94 2 , 2A E,QTAYLOR PUBLISHING CO 091318 1550 W MOCKINGBIRD LN, DALLASAV-GAS 5/19/87 2 , 6 E,QTELECABLE INC 106718 1776 GREENVILLE AVE, RICHARDSONGASOLINE 4/13/93 2 , 2A E,QTEXACO REFINING & MARKETING 092484 3101 S GARLAND RD, GARLANDGASOLINE 1/9/89 2 , 5 E,QTEXACO REFINING & MARKETING 092897 2847 ROYAL LN, DALLASUNKNOWN 4/28/89 2 , 2A E,QTEXACO REFINING & MARKETING 108177 4025 GASTON AVE, DALLASGASOLINE 5/13/94 2 , 5 E,QTEXAS NATIONAL GUARD ARMORY BD 094053 1009 LAKE CREST DR, GRAND PRAIRIEJET FUEL 11/1/89 2 , 3 E,QTEXAS PLYWOOD & LUMBER CO 109175 242 S BAGDAD, GRAND PRAIRIEGASOLINE 1/20/95 2 , 6 E,QTEXAS TEN LTD 104634 108 S MAIN, CEDAR HILLGASOLINE, WASTE OIL 9/17/92 2A , 1A E,QTEXIMAR TEXACO 091399 2525 VALLEY VIEW LN, FARMERS BRANCHGASOLINE 7/15/87 5B , 2A E,QTHE CAR WASH CO 098516 6815 PRESTON RD, DALLASGASOLINE 4/3/91 2 , 2A E,Q* THE MARTIN-BROWER CO108227 1350 AVE S, GRAND PRAIRIEDIESEL 6/6/94 2 , 2A E,QTHOMAS FAMILY PARTNERSHIP 109791 2420 N IH 35 E, CARROLLTONGASOLINE, DIESEL 8/15/95 2 , 2A E,QTHOMPSON & KNIGHT 108954 4915 LEMMON AVE, DALLASGASOLINE 11/4/94 2 , 2A E,QTIM WAZIRALI 108576 3701 W CLARENDON, DALLASGASOLINE 9/6/94 2 , 2A E,Q* TMT INC105730 2910 RUDER, DALLASGASOLINE 11/22/92 2 , 2A E,QTOBIAS S C (JERRY) 098003 10430 HARRY HINES, DALLASGASOLINE, WASTE OIL 1/31/91 2 , 2A E,Q* TOM WELCH106347 16601 ADDISON RD, ADDISONGASOLINE 3/19/93 2 , 2A E,QTOTAL PETROLEUM INC 091358 5950 BROADWAY BLVD, GARLANDUNKNOWN 6/24/87 2A , 6 E,QTOTAL PETROLEUM INC 092178 2407 S HAMPTON RD, DALLASGASOLINE 9/7/88 2 , 6 E,QTOTAL PETROLEUM INC 094316 2300 BECKLEY AVE, DALLASGASOLINE 11/16/89 2 , 4 E,QTNRCC - 46

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTTOTAL PETROLEUM INC 095392 3325 TOWN E BLVD, MESQUITEGASOLINE 3/29/90 2 , 6 E,QTOTAL PETROLEUM INC 097870 10306 FERGUSON RD, DALLASGASOLINE 1/24/91 2 , 6 E,QTOTAL PETROLEUM INC 098479 5816 KEENELAND PKWY, DALLASGASOLINE, DIESEL 2/15/91 2 , 6 E,Q* TOTAL PETROLEUM INC101795 12531 LAKE JUNE RD, BALCH SPRINGSGASOLINE 1/27/92 2 , 5 E,QTOTAL PETROLEUM INC 102493 702 W CENTERVILLE, GARLANDGASOLINE 3/23/92 2 , 6 E,QTOTAL PETROLEUM INC 106459 102 E ARAPAHO, RICHARDSONGASOLINE, DIESEL 4/7/93 2 , 4 E,QTOTAL PETROLEUM INC 106791 14300 JOSEY LN, FARMERS BRANCHGASOLINE 1/6/93 2 , 2A E,QTOTAL PETROLEUM INC 106799 104 S IH--45, WILMERGASOLINE, DIESEL 6/11/93 2 , 2A E,Q* TOTAL PETROLEUM INC107729 8810 GARLAND RD, DALLASGASOLINE 12/20/93 2 , 3 E,QTOTAL PETROLEUM INC 108554 2121 W MOCKINGBIRD LN, DALLASGASOLINE 6/10/94 2 , 2A E,QTOTAL PETROLEUM INC 109820 2810 N BELTLINE RD, IRVINGGASOLINE 8/29/95 1B , 1A E,QTOTAL PETROLEUM INC 111286 1201 W MILLER, GARLANDGASOLINE 7/1/96 2A , 6 E,QTOTAL PETROLEUM INC 111361 13105 SEAGOVILLE RD, BALCH SPRINGSGASOLINE 7/10/96 2 , 2A E,QTOWER OIL COMPANY 092249 437 LOOP 12, DALLASGASOLINE 10/20/88 2 , 2A E,Q* TOWN & COUNTRY112605 818 E MAIN, MESQUITEGASOLINE 6/5/97 1B , 1A E,Q* TOWN OF ADDISON111949 4798 AIRPORT PKWY, ADDISONDIESEL 11/26/96 2 , 2A E,QTRAMMELL CROW CO 092005 7125 HARRY HINES BLVD, DALLASGASOLINE 4/28/88 2 , 6 E,QTRAMMELL CROW CO 094757 1500 DRAGON ST, DALLASGASOLINE 11/13/89 2 , 4 E,QTRIPLE A OIL CO 106933 2801 N FITZHUGH, DALLASOTHER 5/7/93 2 , 2A E,Q* TRIPLE A OIL CO112196 10005 MARSH LN, DALLASGASOLINE 1/23/97 2 , 2A E,QTRIPLE A OIL CO INC 091300 820 S BELTLINE, IRVINGUNKNOWN 5/8/87 2 , 2A E,QTRIPLE A OIL CO INC 091331 5534 DENTON DR, DALLASGASOLINE 2/11/87 2 , 2A E,QTRIPLE A OIL CO INC 091355 5200 HARRY HINES BLVD, DALLASGASOLINE 6/3/87 2 , 6 E,QTRIPLE A OIL CO INC 091418 2360 VALWOOD PKWY, FARMERS BRANCHGASOLINE 7/23/87 2 , 2A E,QTRIPLE A OIL CO INC 092115 1360 N BECKLEY RD, LANCASTERGASOLINE 3/28/88 2A , 6 E,QTRIPLE A OIL CO INC 092290 3522 COLE AVE, DALLASGASOLINE 4/28/88 2A , 6 E,QTRIPLE A OIL CO INC 094113 4316 IH-635, DALLASWASTE OIL 11/29/89 2 , 6 E,QTRIPLE A OIL CO INC 102697 3250 N HAMPTON, DALLASGASOLINE 3/16/92 2 , 2A E,QTRIPLE A OIL CO. 101608 9390 FOREST LN, DALLASGASOLINE 12/29/91 2 , 6 E,Q* TRIPLE A OIL COMPANY INC112797 1636 N MARKET CENTER BLVD, DALLASGASOLINE 10/12/97 1B , 1A E,QTRIPLE A OIL COMPANY, INC. 096975 1330 N BELT LINE RD, IRVINGUNKNOWN 10/17/90 2 , 2A E,QTRITON AIR HOLDINGS INC 093788 7363 CEDAR SPRINGS, DALLASJET FUEL 7/17/89 2 , 6 E,Q* TROPHY NISSAN INC112393 5031 N GALLOWAY, MESQUITEGASOLINE 6/18/97 2 , 6 E,QTTAP TRUST/1ST ST BNK MESQUITE 108312 2621 PEACH TREE RD, BALCH SPRINGSGASOLINE, WASTE OIL 5/26/94 2 , 2A E,QTU ELECTRIC 094576 146 PAYNE ST, DALLASGASOLINE 12/13/89 2 , 2A E,Q* TWIN LAKES PETROLEUM INC112798 9199 BRUTON RD, DALLASUNKNOWN 11/21/97 1B , 1A E,Q* UNITED PARCEL SERVICE104723 4807 SELDON WAY, DALLASWASTE OIL 9/22/92 2 , 2A E,QUNIVERSITY OF TEXAS AT DALLAS 093461 2601 N FLOYD RD, RICHARDSONGASOLINE 7/13/89 2A , 6 E,QUNKNOWN 091627 SEAGOVILLE, SEAGOVILLEGASOLINE 8/20/86 1B , 1A E,QUNKNOWN 104428 FOREST LN, DALLASGASOLINE 8/21/92 2A , 1A E,QUNKNOWN 109596 1335 BROOKSIDE, GLENN HEIGHTSUNKNOWN 10/24/94 5B , 1A E,QUS FOOD SERVICE 095390 1515 BIG TOWN BLVD, MESQUITEDIESEL 4/17/90 2 , 6 E,QUS NAVY DALLAS N A S 097921 JEFFERSON ST, DALLASDIST F OIL 1/29/91 2 , 2A E,QUS NAVY DALLAS N A S 104909 BLDG 169, DALLASWASTE OIL, JET FUEL 10/9/92 1B , 1A E,QUS POSTAL SERVICE 095518 2400 DFW TURNPIKE, DALLASDIESEL 4/18/90 2 , 2A E,Q* US POSTAL SERVICE103928 401 DFW TURNPIKE, DALLASDIESEL 11/15/91 2 , 2A E,QV T INC 109970 1221 N CENTRAL EXWY, RICHARDSONGASOLINE 10/13/95 2 , 6 E,QVAN INGRAM 095388 1926 S GARLAND RD, GARLANDGASOLINE 3/22/90 2 , 2A E,QTNRCC - 47

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DALLASPSTWUDDAWSONPSTDE WITTPSTVICTOR BALLAS PROPERTIES 110252 1014 S BROADWAY, CARROLLTONGASOLINE 6/25/92 2A , 1A E,QVILLAGE CAR WASH INC 111536 5206 GREENVILLE AVE, DALLASGASOLINE 6/10/96 2A , 6 E,QVORELCO INC 094110 2640 FOREST LN, DALLASWASTE OIL 11/27/89 2 , 2A E,QWALEN FRANCES/MARITAL F W 099937 10551 NEW CHURCH RD, DALLASGASOLINE, WASTE OIL 8/15/91 2 , 2A E,QWEATHEFORD OIL CO 098067 521 E 3RD ST, LANCASTERGASOLINE 2/14/91 1B , 1A E,Q* WEATHERFORD OIL CO110370 521 E 3RD ST, LANCASTERGASOLINE, DIESEL 1/30/96 2 , 2A E,QWHITE BYRD E ESTATE 102267 111 S DALLAS ST, LANCASTERGASOLINE 3/19/92 2 , 2A E,Q* WHITLOCK OIL CO112571 215 W COMMERCE, DALLASUNKNOWN 8/29/97 1B , 1A E,QWILLIAM F HOH JR 108740 100 S GREENVILLE, RICHARDSONGASOLINE 10/19/94 5B , 6 E,QWITT MILLER 105232 2433 VALLEY VIEW DR, FARMERS BRANCHGASOLINE 11/9/92 2A , 2A E,QYELLOW FREIGHT SYSTEM, INC 108452 4500 IRVING BLVD, DALLASWASTE OIL, DIESEL 6/29/94 2 , 2A E,QD BAR B MOBILE HOME RANCH 0570082 WELL 1 (G0570082A) - S. SIDE OF MOBILE HOME TETRACHLOROETHENE 12/31/92 4A , 5 E,Q,V,2PARK, 2870 DOWDY FERRY RD.* ACKERLY OIL CO (TRIO FUELS)111701 111 MAIN ST, ACKERLYGASOLINE, DIESEL 9/27/96 2 , 2A E,QBOB CRAWLEY 094198 1311 N DALLAS AVE, LAMESAGASOLINE 11/28/89 2 , 2A E,QBRITT TRUCKING CO 093075 1900 SEMINOLE, LAMESADIESEL 5/22/89 2 , 2A E,QCITY OF LAMESA 095148 304 S 1ST ST, LAMESAGASOLINE 12/5/89 2 , 2A E,Q* CITY OF LAMESA105759 N 1ST, LAMESAWASTE OIL 12/18/92 2 , 2A E,QCLARENCE SCOTT ESTATE 093245 HWY 87, LAMESADIESEL 6/28/89 2 , 6 E,QDAWSON ISD 099636 PO BOX 180, WELCHGASOLINE 7/3/91 2 , 2A E,QFRANKS OIL CO 094312 1312 N DALLAS, LAMESADIESEL 12/12/89 2 , 2A E,QJACK GREGORY 094329 1502 N DALLAS, LAMESAGASOLINE 12/12/89 2 , 2A E,QMARVIN KIDD 094494 FM 2052, LAMESAGASOLINE 12/21/89 2 , 2A E,QMCCORMICK OIL CO INC 093850 1102 N DALLAS AVE, LAMESAGASOLINE 9/20/89 2 , 3 E,QMCCORMICK OIL CO INC 094199 909 N 4TH ST, LAMESAGASOLINE 11/28/89 2A , 2A E,QMCCORMICK OIL CO INC 096331 701 S DALLAS AVE, LAMESAGASOLINE 7/6/90 2A , 1A E,QMORRIS H E 094390 802 S DALLAS, LAMESAGASOLINE 12/14/89 5B , 1A E,QS & C OIL CO 092112 211 S DALLAS AVE, LAMESAGASOLINE 8/25/88 2 , 2A E,QS & C OIL CO 092553 611 N 4TH ST, LAMESAGASOLINE 1/30/89 2 , 2A E,QS & C OIL CO 101779 711 S BRYAN, LAMESAGASOLINE 1/28/92 2A , 1A E,QSANDS ISD 099145 5TH ST, ACKERLYGASOLINE 5/27/91 2 , 2A E,QT H & B PROPERTIES 094305 411 N BRYAN, LAMESAGASOLINE 12/12/89 2 , 2A E,Q* TXDOT099289 HWY 87, LAMESAWASTE OIL 5/21/91 2 , 2A E,QWOODRUM OIL CO 094823 HWY 349, PATRICIAGASOLINE 1/24/90 5B , 2A E,QWOODRUM OIL CO 094826 410 N DALLAS, LAMESAGASOLINE 1/24/90 5B , 2A E,QDE WITT COUNTY 100709 FM 3402, CUERODIESEL, WASTE OIL 10/8/91 2 , 6 E,QLESKE OIL CO 098722 413 S ESPLANADE, CUEROGASOLINE 4/16/91 2 , 2A E,QPRESTON PARSON INC 108183 323 MAIN, YORKTOWNGASOLINE 5/18/94 2 , 2A E,Q* PRESTON PARSONS108090 HWY 72, YORKTOWNGASOLINE 4/6/94 2 , 2A E,QROLAND RIEDESEL INC 110379 503 W MAIN, YORKTOWNGASOLINE 1/30/96 2 , 2A E,QRUDOLPHS INC 106081 RT 3, HOCHHEIMGASOLINE 1/27/93 1B , 1A E,QSSP PARTNERS 110144 111 E MORGAN, CUEROGASOLINE 12/12/95 2A , 6 E,QTNRCC - 48

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DEAF SMITHPSTDELTAWUDPSTDENTONMSWPCD/VCPSTCONSUMERS FUEL CORP 105059 116 NEW YORK ST, HEREFORDGASOLINE 8/20/92 2 , 2A E,QE Z MART STORES INC 105062 817 PARK AVE, HEREFORDGASOLINE 10/21/92 2A , 1A E,QNEWTON LLOYD 098619 907 S MAIN, HEREFORDGASOLINE 3/18/91 2 , 6 E,QUNKNOWN 092201 HEREFORDUNKNOWN 9/22/88 5B , 1A E,QHEREFORD MUNICIPAL WATER SUPPLY 0590001 WELL 3 (GO590001B) - SE OF MCKINLEY AVE. ANDNEW YORK AVE.BTEX, 1,2-DICHLOROETHANE,METHYL CYCLOHEXANE, METHYLPENTANES, BUTANE, METHYLCYCLOPENTANE ET.AL.4/6/88 2D , 5 E,Q,V,2* FFP OPERATING PARTNERS093324 950 E DALLAS ST, COOPERGASOLINE 7/23/89 2 , 2A E,QCITY OF FARMERS BRANCH: MW-1R, 4R, 10, AND11MSW01312A0.8 MI. S OF SH 121, N OF ELM FORK OF TRINITY R., 1.5 MI. W OF FM 2281, HEBRON, TX.VOCs (1,1-DICHLOROETHANE,TCE, PCE, VINYL CHLORIDE, ANDCIS-1,2-DICHLOROETHENE)6/27/91 2A , 2A E,Q* FORMER TEXACO SERVICE STATION560 906 WEST UNIVERSITY DRIVE, DENTONBTEX, TPH 7/2/97 0 , 2 E* HENRIETTA CREEK ROAD SITE519 5800-5900 BLOCK OF HENRIETTA CREEK ROAD, VOCS 5/7/97 0 , 1 EROANOKEOLD ORCHARD SHOPPING CENTER 403 1310 WEST MAIN STREET, LEWISVILLECHLORINATED SOLVENTS 11/18/96 0 , 3 ESNAZZY CLEANERS 171 OLD ORCHARD VILLAGE EAST, 1228 W. MAIN,CHLORINATED SOLVENTS 1/23/96 1 , 0 ELEWISVILLE* TEXAS NEW MEXICO POWER COMPANY668 792 EAST MAIN STREET, LEWISVILLETPH, VOCS, SVOCS, PHENOLS 12/30/97 0 , 2 EACCELERATED CHRISTIAN EDUC 107115 2600 ACE LN, LEWISVILLEDIESEL 8/16/93 2A , 6 E,Q* ADVANCE PETROLEUM096733 HWY 156 AT 3RD STREET, JUSTINGASOLINE 8/10/90 2 , 2A E,QARROW INDUSTRIES INC 091871 1705 JOHN CONNALLY DR, CARROLLTONCHEMICAL 5/5/88 2 , 2A E,QARROW INDUSTRIES INC 099247 2625 BELTLINE RD, CARROLLTONCHEMICAL 6/10/91 2 , 2A E,QARROW INDUSTRIES, INC. 101841 2625 E BELTLINE RD, CARROLLTONDIESEL 2/10/92 2 , 6 E,QARTIN MINASSIAN 099797 1026 N MILL ST, LEWISVILLEGASOLINE 6/24/91 2 , 6 E,Q* CARUTHERS OIL CO104098 FM 407, BARTONVILLEDIESEL 7/27/92 2 , 2A E,QCARUTHERS OIL CO 111249 1200 FT WORTH DR, DENTONGASOLINE, DIESEL 6/14/96 2 , 2A E,QCBS MECHANICAL INC 108726 5001 W UNIVERSITY DR, DENTONGASOLINE 5/27/94 2 , 2A E,QCHEVRON PRODUCTS COMPANY 095513 1901 BELTLINE RD, CARROLLTONGASOLINE 5/3/90 2 , 4 E,QCHEVRON PRODUCTS COMPANY 098616 797 S STEMMONS FWY, LEWISVILLEGASOLINE 4/11/91 2 , 2A E,QCHEVRON USA INC 108474 2802 E HWY 121, LEWISVILLEGASOLINE 4/14/94 2 , 6 E,Q* CITY OF LAKE DALLAS109035 351 BETCHAN DR, LAKE DALLASGASOLINE 1/13/95 2 , 2A E,Q* COASTAL MART INC112792 1920 CARROL BLVD, DENTONGASOLINE 9/11/97 1B , 1A E,QCRAIG SINGER 108553 4513 OLD DENTON RD, CARROLLTONGASOLINE 8/21/94 2 , 2A E,QDENTON CENTER JOINT VENTURE 094341 906 W UNIVERSITY DR, DENTONCHEMICAL 10/18/89 2A , 6 E,QDIAMOND SHAMROCK 091104 5208 S COLONY BLVD, THE COLONYGASOLINE 8/8/86 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 092008 1900 JOSEY LN, CARROLLTONGASOLINE 6/24/88 2 , 2A E,QE Z SERVE PETRO MARKETING CO. 095206 IH-35, LEWISVILLEGASOLINE 3/2/90 2 , 2A E,QEXXON COMPANY USA 092204 700 S STEMMONS FWY, DENTONGASOLINE 9/1/87 2 , 2A E,QEXXON COMPANY USA 092218 1805 ALICE ST, DENTONGASOLINE 9/20/88 2 , 4 E,QEXXON COMPANY USA 095140 1901 N ELM, DENTONGASOLINE 11/28/89 2 , 2A E,QTNRCC - 49

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DENTONPSTEXXON COMPANY USA 097825 1914 BELTLINE RD, CARROLLTONUNKNOWN 1/22/91 2 , 2A E,Q* FARMERS & MERCHANTS BANK099125 3801 IH--35, DENTONGASOLINE 5/28/91 2 , 2A E,Q* FFP OPERATING PARTNERS108295 782 N HWY 121, LEWISVILLEGASOLINE 4/7/93 2 , 2A E,QFIRST COMMERCIAL REALTY 106674 603 S DENTON DR, LAKE DALLASGASOLINE 5/17/93 2 , 2A E,QFRANCIS OIL CO 093690 1500 S BROADWAY BLVD, CARROLLTONGASOLINE 9/14/89 5B , 2A E,QFRED BAKER 104159 1001 N BROADWAY, CARROLLTONUNKNOWN 8/10/92 2A , 1A E,Q* GITA KIANI112360 7616 N MAIN, THE COLONYOTHER 6/6/97 2A , 6 E,QGRS CORP - 1800 FISHER BLDG. 100066 1504 JACKSON ST, CARROLLTONGASOLINE, DIESEL 5/24/91 2 , 6 E,QHAYES LEASING CO INC 105220 1845 E IH--35, CARROLLTONGASOLINE, DIESEL 11/21/92 2 , 6 E,Q* HILZ SNIDER CHEVROLET INC112089 1405 N STEMMONS, SANGERGASOLINE 1/23/97 2 , 2A E,QINLAND CONTAINER CORP 102508 2605 BELTLINE RD, CARROLLTONDIESEL 8/2/91 2A , 2A E,QINLAND CONTAINER CORP 102509 2605 BELTLINE RD, CARROLLTONDIESEL, OTHER 7/23/91 2A , 2A E,Q* J C THOMAS112761 HWY 720, FRISCOGASOLINE 11/4/97 2A , 1A E,QKELSOE OIL COMPANY 091680 1026 N MILL, LEWISVILLEGASOLINE 2/22/88 2 , 6 E,Q* KELSOE OIL COMPANY094760 IH-35, SANGERDIESEL 11/29/90 2 , 2A E,QKELSOE OIL COMPANY 101834 397 PARKWAY, LEWISVILLEGASOLINE 2/11/92 2 , 6 E,QKELSOE TRACTOR CO INC 107630 102 MAIN ST, LAKE DALLASOTHER 8/17/93 2 , 2A E,Q* KELSOE TRACTOR CO INC107951 303 HWY 156, JUSTINGASOLINE, DIESEL 3/3/94 2 , 2A E,QLAKE CITIES LAND DEVELOPMENT 101694 FM 2181, HICKORY CREEKDIESEL 1/29/92 2 , 2A E,Q* LAKELAND BAPTIST CHURCH110391 571 EDMONDS LN, LEWISVILLEGASOLINE 1/23/96 2 , 2A E,QLASSITER JOHN 102374 315 FORT WORTH DR, DENTONGASOLINE 3/25/92 2 , 2A E,QLEWISVILLE ISD 092093 TIMBERCREEK, LEWISVILLEDIESEL 8/23/88 2A , 6 E,QMCMAHAN OIL CO 102939 412 N BELL, DENTONUNKNOWN 4/24/92 2 , 3 E,QMCMAHAN OIL COMPANY 108765 1205 E UNIVERSITY DR, DENTONGASOLINE 2/23/94 2 , 2A E,QMERICO INC 101990 1905 COUNTRY CLUB DR, CARROLLTONGASOLINE, DIESEL, WASTE OIL 10/2/91 2 , 2A E,Q* MOBIL OIL110522 6262 W MAIN ST, LEWISVILLEUNKNOWN 4/18/96 2 , 2A E,QMOBIL OIL CORP 091816 4001 STEMMONS BLVD, DENTONGASOLINE 4/26/88 2 , 6 E,QMOBIL OIL CORP 092161 1001 FOX AVE, LEWISVILLEGASOLINE 7/14/86 2 , 6 E,QMOBIL OIL CORP 094631 3055 OLD DENTON RD, CARROLLTONGASOLINE 11/29/89 2 , 6 E,QMOBIL OIL CORP 099332 1298 W MAIN ST, LEWISVILLEGASOLINE 6/12/91 2 , 2A E,QMOBIL OIL CORP 102691 2745 BELTLINE RD, CARROLLTONGASOLINE 3/30/92 2 , 2A E,QMURR & COMPANY 093417 511 W UNIVERSITY DR, DENTONGASOLINE 4/12/89 2 , 2A E,QNAT'L ENVIRONMENTAL TECH CORP 109770 4220 JUSTIN RD, LEWISVILLEGASOLINE 6/28/95 2 , 2A E,QONE STOP FOOD STORES 111665 4005 N STEMMONS FWY, DENTONGASOLINE 8/26/96 2 , 2A E,QOWEN SPRUANCE 107133 515 E IH--35, DENTONGASOLINE 8/11/93 2 , 2A E,QPADAYACHEE S K 093869 1600 S IH-35, CARROLLTONGASOLINE 9/6/89 2 , 2A E,Q* PHIL BARTLETT112354 3300 LONG PRAIRIE RD, FLOWER MOUNDGASOLINE, DIESEL 6/2/97 2 , 2A E,QPROVIDENT BANK 102029 1103 W UNIVERSITY, DENTONGASOLINE 2/27/92 2 , 2A E,QR M LEWIS 110061 S HWY 77, KRUGERVILLEGASOLINE 10/20/95 2A , 1A E,Q* REZA TRADING ENTERPRISE INC112281 6279 S STEMMONS FWY, CORINTHUNKNOWN 5/5/97 2 , 2A E,QRUMMELL OIL CO. 100116 1825 W UNIVERSITY DR, DENTONGASOLINE 9/10/91 2 , 2A E,Q* RUSSELL NEWMAN MFG INC098633 600 N LOOP 288, DENTONGASOLINE, DIESEL 4/12/91 2A , 1A E,QSAFETY KLEEN CORP 091626 1722 COOPER RD, DENTONDIESEL 1/22/88 2 , 2A E,QSHELL OIL CO 095562 1601 E IH--35, CARROLLTONWASTE OIL 4/9/90 2 , 2A E,QSOUTHLAND CORP 091056 1865 ROSEMEADE PKWY, CARROLLTONGASOLINE 1/16/86 2 , 2A E,QSPENCER DISTRIBUTING 109600 3430 E UNIVERSITY, DENTONGASOLINE 6/14/95 2 , 2A E,QSTAR ENTERPRISE 091581 802 S STEMMONS FWY, LEWISVILLEGASOLINE 12/22/87 2 , 2A E,QSTAR ENTERPRISE 098981 1597 W MAIN, LEWISVILLEGASOLINE 5/15/91 2 , 6 E,QTNRCC - 50

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236DENTONPSTDICKENSPSTDIMMITPSTDONLEYPSTDUVALPSTEASTLANDIHWSTAR ENTERPRISE 108340 1131 S STEMMONS FWY, LEWISVILLEGASOLINE 4/26/93 2A , 1A E,QSUNPOWER, INC. 094606 6421 N IH 35 E, DENTONDIESEL 12/23/89 2 , 2A E,QSUNRISE ENTERPRISE 094957 733 FORT WORTH DR, DENTONGASOLINE 9/22/88 2 , 2A E,QTEXAS DEPT OF PUBLIC SAFETY 096281 820 N LOOP 288, DENTONGASOLINE 7/26/90 2 , 3 E,Q* TEXAS NEW MEXICO POWER CO112572 792 E MAIN, LEWISVILLEGASOLINE 8/26/97 1B , 1A E,QTOTAL PETROLEUM INC 111204 501 E IH-35, DENTONGASOLINE 6/12/96 1B , 1A E,QTRIPLE A OIL CO 108314 1911 UNIVERSITY DR, DENTONGASOLINE 6/14/94 2 , 2A E,QTRIPLE A OIL CO INC 101881 401 S HWY 377, ARGYLEGASOLINE, DIESEL 2/12/92 2 , 2A E,QTXDOT 096483 2622 W PRAIRIE, DENTONGASOLINE, DIESEL 8/15/90 2 , 2A E,QTXDOT 102049 592 E HWY 121, LEWISVILLEGASOLINE, WASTE OIL 2/21/92 2 , 2A E,QUAC OF GARLAND, INC. 100282 7228 N MAIN ST, THE COLONYGASOLINE 9/6/91 2 , 2A E,QUNKNOWN 093215 713 SUN VALLEY, DENTONCHEMICAL 7/6/89 5B , 2A E,QUNOCAL CORP - AUTO TRUCK STOPS 093689 6420 N IH-35, DENTONGASOLINE 10/8/89 2 , 2A E,QWASTE MANAGEMENT OF N A INC 100590 1600 WASTE MANAGEMENT BLVD, LEWISVILLE DIESEL 9/6/91 2 , 2A E,QALLSUP PETROLEUM 111582 322 W HILL ST, SPURGASOLINE 4/6/96 2 , 2A E,Q* FARMERS COOP GIN & SUPPLY111745 302 E 6TH ST, SPURGASOLINE 9/17/96 2 , 2A E,QFIRST BAPTIST CHURCH 093101 100 W 2ND ST, SPURKEROSENE 5/10/89 2 , 6 E,QTODD LEONARD 095177 601 W HARRIS, SPURGASOLINE 2/27/90 5B , 1A E,QTXDOT 103014 E HWY 82, DICKENSGASOLINE, DIESEL 10/1/91 2 , 6 E,QWYLIE INC 096502 HWY 82, DICKENSGASOLINE 7/31/90 2 , 2A E,QEXXON COMPANY USA 098556 102 N 1ST ST, CARRIZO SPRINGSGASOLINE 3/21/91 2 , 6 E,Q* J & E OIL112582 311 PENA ST, CARRIZO SPRINGSGASOLINE 8/25/97 1B , 1A E,Q* J & E OIL CO112614 1200 N 1ST ST, CARRIZO SPRINGSGASOLINE 8/25/97 1B , 1A E,QTXDOT 099709 CLARENDON, CLARENDONGASOLINE 7/10/91 2 , 6 E,QWEST TEXAS GAS INC 101300 313 W 2ND, CLARENDONGASOLINE 10/28/91 2 , 2A E,QBEST INC 110950 HWY 716, CONCEPCIONGASOLINE 5/8/96 2 , 6 E,QCOASTAL MAVERICK 109550 101 S NORTON, FREERGASOLINE 3/28/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 095155 HWY 359, SAN DIEGOGASOLINE 3/13/90 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 098031 322 S NORTON, FREERGASOLINE 2/19/91 2 , 6 E,QHOSE PETROLEUM 096275 HWY 359, BENAVIDESGASOLINE 7/30/90 2 , 4 E,QGE RAILCAR SERVICES CORPORATION 32088 TIFFIN RD., P.O. BOX 115, RANGERSOLVENTS, DICHLOROPROPANE,VINYL CHLORIDE, BENZENE,CHLOROBENZENE, HC'S8/1/81 3A,3B , 5 E,Q,V,2,3PCD/CAGE RAILCAR SERVICES CORPORATION 32088 TIFFIN RD., P.O. BOX 115, RANGERSOLVENTS, DICHLOROPROPANE,VINYL CHLORIDE, BENZENE,CHLOROBENZENE, HC'STNRCC - 518/1/81 3A,3B , 2,5 E,Q,V,2,3

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236EASTLANDPCD/ENFGE RAILCAR SERVICES CORPORATION 32088 TIFFIN RD., 1.5 MI NORTH OF RANGER, TXPETROLEUM HYDROCARBONS,SOLVENTS8/1/88 3A , 5 EQECTORPCD/SUPPSTENF/WSTFODIHWPCD/CAPCD/ENFSONICS INTERNATIONAL STATE SUPERFUNDSITEWDW116/137APPROXIMATELY 2 MILES WEST OF RANGER TX ONF.M. 101TRICHLOROETHANE,DICHLOROETHANE, CHLOROFORM11/16/90 5B , 4 E,Q,V,1,2,3* ABTEX BEVERAGE CORP112513 W IH 20, RANGERDIESEL 8/4/97 2 , 6 E,QE Z SERVE PETRO MARKETING CO 110162 300 E MAIN, EASTLANDGASOLINE 12/5/95 2 , 2A E,QFIRST STATE BANK DELEON 099138 601 E HWY 80, RANGERGASOLINE 4/3/91 1B , 1A E,QHORN MARKETING INC 111811 201 MAIN ST, RISING STARUNKNOWN 10/24/96 1B , 1A E,QLAVERNE MEEKS 094660 513 W MAIN ST, EASTLANDGASOLINE 12/19/90 2 , 2A E,QLAVERNE MEEKS 095265 503 W MAIN ST, EASTLANDGASOLINE 11/16/89 2 , 2A E,Q* LOVES COUNTRY STORES112139 IH 20, RANGERGASOLINE 2/22/97 2 , 6 E,QWEST-T-GO #20 109445 100 RAILROAD AVE, RANGERGASOLINE, DIESEL 4/7/95 2 , 6 E,QBAKER PERFORMANCE CHEMICALS-ODESSA- 32536 410 E. HILLMONT RD., ODESSA, TX 79761BTEX,ORGANICS,NAPTHALENE 11/5/86 3B , 5 EQV23MAGNACONTINENTAL PRODUCTS 30251 100 INDUSTRIAL AVE., ODESSAHEXAVALENT CHROMIUM 1/1/85 3 , 3 ELEIGH METAL COATING 31675 2725 WEST 81ST STREET, ODESSACHROME 10/31/89 4A , 4 EQVMONARCH ROD SERVICE 39986 153 MOSS AVENUE, ODESSANAPHTHA, LEAD 1/1/90 3 , 3 ERELIABLE MACHINE & SUPPLY 30775 2035 WEST 2ND STREET, ODESSACHROMIUM 9/1/95 3B , 2A ESHELL ODESSA 30258 S. GRANDVIEW ST.,~3 MI S. OF DOWNTOWNHYDROCARBONS, METALS 11/12/86 3B , 5 EQV23ODESSASIVALLS TANKS, INC. 35690 2200 E. 2ND STREET, ODESSACHROMIUM 5/15/86 3B , 3 EQBJ SERVICES COMPANY U.S.A.2205 WEST SECOND STREET, ODESSA, TXTPH, BENZENE, TOLUENE,EHTYLBENZENE, P-&M-XYLENE, O-XYLENE5/5/93 2 , 6 E,QSTEPHENS RENTAL CO., INC. EF9008486 4610 W. HIGHWAY 80, ODESSA, TXALCOHOLS, HYDROCARBONS 8/29/90 2C , 6 E,QHUNTSMAN (FORMERLY REXENE AND EL PASOPRODUCTS30142 SOUTH GRANDVIEW ST., ODESSABENZENE, PETROLEUMHYDROCARBONS (FREE &DISSOLVED), XYLENE12/15/86 3A , 4,5 E,Q,V,2,3SHELL OIL COMPANY - ODESSA 30258 S. GRANDVIEW ST.,~3 MI S. OF DOWNTOWNHYDROCARBONS 1/14/86 3A , 4,5 E,Q,V,2,3ODESSAEL PASO PRODUCTS (REXENE) 30142 SOUTH GRANDVIEW ST., ODESSABENZENE, PETROLEUMHYDROCARBONS (FREE &DISSOLVED), XYLENE12/15/86 3 , 4,5 E,Q,V,2,3EXXON CHEMICAL - ODESSA 37190 2126 MAURICE, ODESSASOLVENTS 6/3/93 2B , 2 EHOMCO INT'L - ODESSA 52075 2122 MAURICE, ODESSATPH 9/22/93 3 , 2 E* KATY INDUSTRIES30926 8326 W. COUNTY ROAD, ODESSACHROMIUM 11/17/83 3B , 4 ESHELL OIL COMPANY - ODESSA 30258 S. GRANDVIEW ST.,~3 MI S. OF DOWNTOWNODESSAHYDROCARBONS 1/14/86 3 , 4,5 E,Q,V,2,3AIR LIQUIDE AMERICA CORP. 30685 3114 1/2 W. 2ND ST., ODESSA, TX 79762ACETONE 3/31/94 2D , 2B E,V3BJ SERVICES CO.,USA (WESTERN CO. NA) 30694 8100 W. MURPHY, ODESSADCA,TCE,MEK,BTEX,ACETONE,AS, 9/11/90 2B , 3A EQV23BA,CR,PBTNRCC - 52

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ECTORPCD/ENFPCD/SUPPCD/VCPSTBJ SERVICES COMPANY, USA 32316 2505 WEST 2ND ST, ODESSATPH,BTEX 1/1/93 2B , 4 E,QCOLTEC IND (FRANCE COMPRESSOR) 31868 4147 JACKSON AVENUE, ODESSACHROMIUM 5/8/87 0 , 4 E YHOMCO INTERNATIONAL, INC. 52075 2122 MAURICE RD, ODESSACR, ZN, VINYL,DICHLOROETHYLENE8/15/91 2C , 3 ETRICO 34658 3218 KERMIT HWY, ODESSACHROMIUM 5/1/91 2C , 3 EQNATIONAL CHROMIUM CORPORATION N/W ODESSA, 2626 STEVENS RD., ODESSACHROMIUM 5A , 1ODESSA CHROMIUM 1 SUPERFUND SITE-N/W ODESSA, WEST OF COUNTY RD, WESTHEXAVALENT CHROMIUM 2/28/86 5A , 4 E,Q,V,2,3MULTIPLE PRPSBETWEEN 37TH AND 48TH STREETSODESSA CHROMIUM IIN SUPERFUND SITE N/W ODESSA, W. OF COUNTY RD. WEST, BETWEEN57TH AND 61ST STHEXAVALENT CHROMIUM 1/6/86 5A , 4 E,Q,V,1,2ODESSA CHROMIUM IIS SUPERFUND SITE-MULTIPLE PRPSN/W ODESSA, WEST OF COUNTY RD. WEST,BETWEEN 50TH AND 57TH STREETSHEXAVALENT CHROMIUM 1/6/86 5A , 4 E,Q,V,2,3PERMIAN CHEMICAL STATE SUPERFUND SITE ON PRONTO RD, SOUTH OF HWY. 80, EAST OF TOTAL DISSOLVED SOLIDS 8/15/85 5B , 2A E,Q,V,3ODESSA TXD087491528PRECISION MACHINE STATE SUPERFUND SITE 30877 500 WEST OLIVE ST ODESSA, TX (A STATESUPERFUND SITE - ON REGISTRY 1988)CHROMIUM 3/16/87 5B , 3 E,Q,V,2,3SPRAGUE ROAD (LEIGH METALS) N/W ODESSA, S. OF 83RD ST.AND W. OF BEESON HEXAVALENT CHROMIUM 8/1/84 5A , 2A E,Q,V,2,3ST.EXXON CHEMICAL COMPANY 234 2126 MAURICE ROAD/950 W COUNTRY RD, S,VOCS, TPH 4/22/96 0 , 5 EODESSABASIN ACIDIZING INC 092289 8400 ANDREWS HWY, ODESSAGASOLINE 11/8/88 2 , 2A E,QBIDCO (JIM GOLDEN) 091824 312 2ND ST, ODESSAGASOLINE 4/27/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093730 1363 E 8TH ST, ODESSAGASOLINE 9/15/89 2 , 4 E,Q* CITY OF ODESSA107456 205 N GRANT, ODESSAGASOLINE, DIESEL 11/10/93 2 , 2A E,QDARRELL LOGSDON 096878 1124 N GRANT, ODESSAGASOLINE, CHEMICAL 9/27/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 100875 803 S CRANE, ODESSAGASOLINE 7/8/91 2 , 2A E,QDIVERSIFIED WAREHOUSING 107243 600 S INDUSTRIAL AVE, ODESSADIESEL 8/25/93 2 , 2A E,QE E HENSLEY & SON 108934 825 W 1ST ST, ODESSADIESEL 6/7/94 2 , 2A E,QE E HENSLEY AND SONS 095094 1601 S GRANT AVE, ODESSAGASOLINE 2/28/90 2 , 2A E,QE E. EASLEY, INC. 094374 701 N GRANDVIEW, ODESSAGASOLINE 11/27/89 5B , 1A E,Q* E E. HENSLEY & SON107106 1200 W 10TH ST, ODESSAGASOLINE 8/6/93 2A , 1A E,QE Z MART STORES INC 104149 1607 W CITY RD, ODESSAGASOLINE 7/29/92 2 , 5 E,QECTOR COUNTY 108637 7613 DUNN, ODESSAGASOLINE 9/8/94 2A , 6 E,QEXXON COMPANY USA 099040 1100 E 42ND ST, ODESSAGASOLINE 2/27/91 2 , 2A E,QEXXON COMPANY USA 100429 2544 ANDREWS HWY, ODESSAGASOLINE 10/1/91 2 , 2A E,QEXXON COMPANY USA 100827 2701 N GRANDVIEW, ODESSAGASOLINE 5/6/91 2 , 2A E,Q* EXXON COMPANY USA106587 4041 MAPLE, ODESSAGASOLINE, WASTE OIL 4/15/93 2 , 4 E,QFINA OIL & CHEMICAL CO 092506 602 E 2ND ST, ODESSAGASOLINE 12/19/88 2 , 2A E,QFINA OIL & CHEMICAL CO 096557 5202 N DIXIE, ODESSAGASOLINE 8/23/90 2 , 4 E,QFLINT ENGINEERING & CONSTRUCT 097135 W LOOP 338, ODESSAGASOLINE, DIESEL 10/31/90 1B , 1A E,QHALLIBURTON SERVICES 105489 6155 W MURPHY ST, ODESSADIESEL 12/8/92 2 , 6 E,Q* HINKLE EQUIPMENT112417 4603 ANDREWS HWY, ODESSAGASOLINE 6/12/97 2 , 2A E,QICA PROPERTY 100723 3800 E 42ND ST, ODESSAUNKNOWN 10/31/91 2A , 1A E,QJOHNSON BROS OIL CO 095763 620 E 2ND ST, ODESSAGASOLINE 4/23/90 2 , 2A E,QJOHNSON BROS OIL CO 097441 2035 ANDREWS HWY, ODESSAGASOLINE 12/3/90 2 , 2A E,Q* K A T SAV MOR INC112878 4230 N GRANDVIEW AVE, ODESSAGASOLINE 10/10/96 1B , 1A E,QTNRCC - 53

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ECTORPSTEL PASOENF/WSTENF/WTRPCD/CAKENT DISTRIBUTORS 091633 601 N COUNTY RD, ODESSAGASOLINE 1/11/88 2 , 2A E,QKOUNTRY BURGER 096128 1123 N GRANT, ODESSAGASOLINE 5/21/90 5B , 1A E,Q* LAMPE HOWARD098765 721 W 2ND, ODESSAGASOLINE 4/24/91 2 , 2A E,QLEON YOUNGER 096626 5109 ANDREWS HWY, ODESSAGASOLINE 8/17/90 2 , 2A E,QMESA OPERATING CO. 091698 3001 KERMIT HWY, ODESSADIESEL 2/25/88 2A , 2A E,QPHILLIPS 66 CO 095338 1411 W 2ND, ODESSADIESEL 1/8/90 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 097439 1700 S GRANT, ODESSAGASOLINE 10/2/90 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 097652 1201 N GRANT ST, ODESSAGASOLINE 11/5/90 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 102738 1629 E 8TH ST, ODESSAGASOLINE 4/22/92 2 , 2A E,QSALMON G Q AND SON INC 102981 1835 FM 1936, ODESSADIESEL 5/26/92 2 , 2A E,QSOUTHLAND CORP 091699 603 E 2ND, ODESSAGASOLINE 2/11/88 2 , 4 E,QSOUTHLAND CORP 097088 6001 EASTRIDGE, ODESSAGASOLINE 10/25/90 2 , 3 E,QSOUTHLAND CORP 097136 2712 E 8TH ST, ODESSAGASOLINE 10/27/90 2 , 2A E,QSOUTHLAND CORP 097137 2700 N DIXIE, ODESSAGASOLINE 10/27/90 2 , 2A E,QSOUTHLAND CORP 101045 601 W 2ND ST, ODESSAGASOLINE 11/20/91 2 , 3 E,QSOUTHLAND CORP 106953 2626 N GRANDVIEW, ODESSAGASOLINE 7/19/93 2 , 2A E,QSOUTHLAND CORP 106956 600 S GRANDVIEW, ODESSAGASOLINE 7/16/93 2 , 2A E,QSOUTHLAND CORP 106968 801 N HARLESS, ODESSAGASOLINE 7/21/93 2 , 2A E,QSOUTHLAND CORP 106990 1101 E 42ND ST, ODESSAGASOLINE 7/27/93 2 , 3 E,QSOUTHLAND CORP 107850 1401 W UNIVERSITY, ODESSAGASOLINE 7/23/93 2 , 2A E,QSOUTHLAND CORP 107852 1000 N GRANT, ODESSAGASOLINE 7/20/93 2 , 2A E,QSOUTHWEST CONVENIENCE STORES 092046 721 COUNTY ROAD WEST, ODESSAGASOLINE 8/2/88 2 , 2A E,QSOUTHWEST CONVENIENCE STORES 106967 1523 N HARLESS, ODESSAGASOLINE 7/21/93 2 , 2A E,QSOUTHWEST CONVENIENCE STORES 108110 3900 TANGLEWOOD, ODESSAGASOLINE 2/17/94 2 , 6 E,Q* SOUTHWEST CONVENIENCE STORES108111 800 W COUNTY RD, ODESSAGASOLINE 4/12/94 2 , 2A E,QSOUTHWEST CONVENIENCE STORES 109631 3700 ANDREWS HWY, ODESSAGASOLINE 6/15/95 2 , 2A E,QSOUTHWEST ENERGY DIST INC 096375 317 N DIXIE, ODESSAGASOLINE 8/1/90 2 , 3 E,QSOUTHWEST ENERGY DIST INC 096379 2210 W 2ND ST, ODESSAGASOLINE 7/31/90 2 , 2A E,QSPARKY'S GROCERY & DELI 098821 3734 KERMIT HWY, ODESSAGASOLINE 5/1/91 2A , 1A E,QTMBR SHARP DRILLING INC 101042 8700 SPRAGUE, ODESSAGASOLINE 11/27/91 2A , 5 E,QTOMMIE FRANCES WILSON 093577 HWY 3855, ODESSAGASOLINE 5/22/89 2 , 2A E,QTRIPP CONSTRUCTION 107475 1073 N FM 1936, ODESSAGASOLINE, DIESEL 11/17/93 2 , 2A E,QUNKNOWN 091404 UNKNOWN, NOTREESUNKNOWN 5/27/87 5B , 2A E,QUNKNOWN 110376 8TH & EXPRESS WAY, ODESSAUNKNOWN 2/7/96 1B , 1A E,QUS POSTAL SERVICE 096877 200 N TEXAS, ODESSAGASOLINE 10/5/90 2A , 2A E,QVIKING FREIGHT SYSTEMS 094183 600 EXPRESSWAY AVE, ODESSADIESEL 11/13/89 2 , 4 E,QWAUKESHA PEARCE INDUSTRIES INC 100616 1000 W 2ND ST, ODESSAGASOLINE 10/22/91 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY-EL PASO 30605 TROWBRIDGE & MARKET, S OF IH10, EL PASO HYDROCARBONS, APP.VIII1/1/82 1B , 3 EQV23REFINERCONSTITUENTSEL PASO REFINING CO LTD 30026 6500 TROWBRIDGE, EL PASOHYDROCARBONS, BTEX 1/1/81 3B , 5 EQV23* US ARMY FORT BLISS63003 NE OF EL PASOMERCURY, CHROMIUM 11/3/95 3B , 2 EQASARCO - EL PASO 31235 PAISANO DRIVE AT EXECUTIVE, EL PASOARSENIC AND OTHER METALS 11/5/90 2A , 2C EQV12BORDER STEEL MILLS 31209 IH-10 & VINTON RD, VINTONORGANICS 1/26/90 3A , 2 E,QTNRCC - 54

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236EL PASOPCD/CAPCD/ENFPCD/VCPSTCHEVRON OIL CO 30605 TROWBRIDGE & MARKET, S OF IH10, EL PASO BTEX, DIESEL, ACID WASTES 3/1/82 3A3B , 2A,5 E,QEL PASO ACID 39027 NW INT OF US HWY 62-180 & FM 6590 , 3SOUTHWESTERN BELL TELEPHONE 52114 100 SUNSET DR., EL PASOBENZENE,TPH,TCE 6/20/91 2A , 2 V.2.WHITE SPUR CLEANERS 74682 4798 DONIPHANTETRACHLOROETHENE 2B , 2A EQV3* RED TOP LINEN SUPPLY, INC.370 4640 DONIPHAN, EL PASOSOLVENTS 10/14/96 0 , 2 EAMERITRUST 100855 1855 LEE MOORE RD, SAN ELIZARIOGASOLINE 11/4/91 2 , 2A E,QAPODACA ARMANDO 105920 11536 SOCORRO RD, SOCORROGASOLINE 1/22/93 5B , 1A E,QASARCO INC 094594 PAISANO, EL PASODIESEL 2/8/90 2 , 4 E,QASARCO INC 095897 2301 W PAISANO, EL PASODIESEL 6/14/90 2 , 2A E,QBELL THUNDERBIRD OIL CO 092373 2301 N MESA, EL PASOGASOLINE 12/5/88 2 , 2A E,QBELL THUNDERBIRD OIL CO 108876 1166 YARBROUGH, EL PASOGASOLINE 11/2/94 2 , 6 E,Q* BERT BORSBERRY100821 5165 HERCULES AVE, EL PASOGASOLINE 10/10/91 2 , 2A E,QBOARD OF REGENTS UT SYSTEM 102548 1708 PAISANO, EL PASOWASTE OIL 3/31/92 2 , 2A E,QBOARD OF REGENTS UT SYSTEMS 101551 1609 E PAISANO, EL PASOGASOLINE 1/7/92 2 , 2A E,Q* BOB BRIDGE112039 8164 N LOOP, EL PASOGASOLINE, WASTE OIL 1/2/97 2 , 2A E,QCHARLES AUSTIN YEARWOOD 091781 2628 WYOMING, EL PASODIESEL 4/1/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 091011 4680 MONTANA, EL PASOGASOLINE 2/28/84 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091458 6631 MONTANA AVE, EL PASOGASOLINE 6/24/87 2 , 4 E,QCHEVRON PRODUCTS COMPANY 093779 214 VALVERDE ST, EL PASOGASOLINE 9/25/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093783 4500 MONTANA AVE, EL PASOGASOLINE 10/4/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093890 1422 AIRWAYS BLVD, EL PASOUNKNOWN 11/3/89 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY108334 6445 N LOOP, EL PASOGASOLINE 5/24/94 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108335 8500 ALAMEDA, EL PASOGASOLINE 6/6/94 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110958 7694 ALMEDA, EL PASOGASOLINE 4/3/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY111003 7299 ALAMEDA, EL PASOGASOLINE 4/8/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY111962 219 E PAISANO, EL PASOUNKNOWN 12/3/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY112154 220 E PAISANO, EL PASOGASOLINE 2/25/97 2 , 2A E,QCHEVRON USA 110959 428 YARBROUGH, EL PASOGASOLINE 4/3/96 2 , 6 E,QCHEVRON USA INC 108391 8400 MONTANA, EL PASOGASOLINE 7/15/94 2 , 6 E,QCHIQUITA BRANDS INTERNATIONAL 095402 400 INGLEWOOD, EL PASOWASTE OIL 3/29/90 2 , 6 E,QCIRCLE K CORP 095791 6864 DONIPHAN, CANUTILLOGASOLINE 4/17/90 2A , 6 E,QCIRCLE K CORP 107546 6398 DONIPHAN, EL PASOGASOLINE 11/17/93 2 , 6 E,QCITY OF EL PASO 091891 210 S CAMPBELL, EL PASOGASOLINE, DIESEL 5/2/88 2 , 2A E,Q* CITY OF EL PASO097368 8803 ALAMEDA, EL PASODIESEL 11/28/90 2 , 2A E,QCITY OF EL PASO 098827 700-A SAN FRANCISCO ST, EL PASODIESEL 5/7/91 2 , 4 E,QCITY OF EL PASO 101570 115 SHORTY LN, EL PASODIESEL 1/17/92 2 , 2A E,QCITY OF EL PASO 105449 121 ATLANTIC, EL PASODIESEL 10/19/92 2 , 2A E,Q* COUNTY OF EL PASO112896 191 CANUTILLO AVE, EL PASOGASOLINE 12/3/97 1B , 1A E,QDANNY'S GROCERY INC 095236 7900 ALAMEDA AVE, EL PASOGASOLINE 3/27/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 092358 3668 DONIPHAN, EL PASOGASOLINE 12/6/88 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO096956 840 ZARAGOSA, EL PASOUNKNOWN 10/16/90 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO097132 2850 MONTANA, EL PASOGASOLINE 11/1/90 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO098193 201 AMERICAS AVE, EL PASOGASOLINE 12/27/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 102001 1603 GEORGE DIETER DR, EL PASOGASOLINE 12/9/91 2A , 6 E,QTNRCC - 55

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236EL PASOPST* DIAMOND SHAMROCK REF & MKTG CO104213 3001 N YARBOROUGH, EL PASOGASOLINE 8/11/92 2A , 1A E,Q* DIAMOND SHAMROCK REF & MKTG CO108210 4421 MONTANA, EL PASOGASOLINE 11/19/93 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 108333 390 S MAIN, ANTHONYGASOLINE 5/16/94 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109028 1915 MONTANA, EL PASOUNKNOWN 5/14/94 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO111319 4201 N MESA, EL PASOGASOLINE 6/12/96 2 , 2A E,QDIMAOND SHAMROCK RFNG. & MKTG. 098189 1250 AIRWAY BLVD, EL PASOGASOLINE 12/27/90 2 , 2A E,QEDUARDO AGUILAR, JR. 108371 6885 DONIPHAN, CANUTILLOGASOLINE 5/24/94 5B , 1A E,QEL PASO BAKING CO 108992 301 N DALLAS ST, EL PASOUNKNOWN 3/16/94 2 , 2A E,QEL PASO COUNTRY CLUB 101200 400 CAMINO REAL, EL PASOGASOLINE 12/3/91 2 , 6 E,QEL PASO COUNTY 105267 6500 DELTA DR, EL PASOGASOLINE 11/4/92 2 , 6 E,Q* EL PASO COUNTY107257 201 NW FIRST, FABENSGASOLINE 2/25/93 2 , 5 E,QEL PASO ELECTRIC CO 101128 651 HAWKINS BLVD, EL PASODIESEL 3/2/89 2 , 2A E,Q* ELVIRA HOLQUIN093414 4705 DYER ST, EL PASOGASOLINE 7/18/89 2 , 2A E,Q* EUGENE BELL112373 5188 DONIPHAN, EL PASOGASOLINE 6/4/97 2 , 2A E,QF E YEARWOOD LAND TRUST 110921 4731 MONTANA, EL PASOWASTE OIL 3/5/96 2A , 1A E,QFABENS OIL CO 100823 5221 WREN AVE, EL PASOWASTE OIL 7/25/91 2 , 2A E,QFABENS OIL CO 105100 201 N FABENS, FABENSGASOLINE 10/1/92 2A , 1A E,QFABENS OIL CO 108052 505 W MAIN, FABENSGASOLINE, WASTE OIL 8/19/93 2 , 2A E,QFABENS OIL CO 108877 13210 ALAMEDA, FLINTGASOLINE 11/16/94 2 , 2A E,QFRANCES RICE (MRS) 108510 5015 MONTANA AVE, EL PASOGASOLINE, WASTE OIL 7/22/94 2 , 6 E,QGASTELUM ROSENBERG 096823 2000 W PAISANO, EL PASOUNKNOWN 9/28/90 5B , 1A E,Q* GILBERT MALOOLY112345 950 SUNLAND DR, EL PASOGASOLINE 5/29/97 2 , 2A E,Q* GILBERT REYES110302 9967 ALAMEDA, EL PASOGASOLINE 12/21/95 2 , 2A E,QGOOD TIMES STORES INC 091212 5598 DONIPHAN DR, EL PASOUNKNOWN 1/16/87 2 , 4 E,QGOOD TIMES STORES INC 092990 602 HORIZON, SOCORROGASOLINE 4/28/89 2 , 4 E,QGOOD TIMES STORES INC 095876 295 PADRES, EL PASOGASOLINE 5/31/90 2 , 2A E,QGOOD TIMES STORES INC 097754 12901 ALAMEDA AVE, EL PASOGASOLINE 1/2/91 2 , 2A E,QGOOD TIMES STORES INC 098544 12370 SOCORRO, SAN ELIZARIOGASOLINE 3/27/91 2 , 2A E,QGOOD TIMES STORES INC 101831 6390 ALAMEDA, EL PASOGASOLINE 2/11/92 2 , 2A E,QGOOD TIMES STORES INC 102240 6060 ALAMEDA AVE, EL PASOGASOLINE 3/18/92 2 , 2A E,QGOOD TIMES STORES INC 102279 1098 COUNTRY CLUB RD, EL PASOGASOLINE 3/20/92 2A , 6 E,QGOOD TIMES STORES INC 102280 9370 NORTH LOOP DR, EL PASOGASOLINE 3/20/92 2 , 4 E,QGOOD TIMES STORES INC 102281 10001 ALAMEDA AVE, EL PASOGASOLINE 3/20/92 2 , 5 E,QGOOD TIMES STORES INC 102283 9829 SOCORRO DR, EL PASOGASOLINE 3/20/92 2 , 2A E,QGOOD TIMES STORES INC 102423 10499 ALAMEDA AVE, EL PASOGASOLINE 3/30/92 2A , 6 E,QGOOD TIMES STORES INC 102424 10100 N LOOP DR, EL PASOGASOLINE 3/30/92 2A , 6 E,QGOOD TIMES STORES INC 102425 101 W MAIN, FABENSGASOLINE 3/30/92 2 , 2A E,QGOOD TIMES STORES INC 103198 1259 ZARAGOSA RD, EL PASOGASOLINE 5/26/92 2 , 2A E,QHYDER ROBERT 101408 7322 NORTH LOOP RD, EL PASOGASOLINE 1/2/92 2 , 2A E,QINT'L BOUNDARY & WATER COMMIS 107801 RIO GRANDE FLOODWAY, EL PASOGASOLINE 2/14/94 2 , 6 E,QINT'L BOUNDARY & WATER COMMIS 108049 2616 W PAISANO, EL PASOGASOLINE 2/15/94 2A , 1A E,Q* JALMARK106733 1600 E SAN ANTONIO DR, EL PASOUNKNOWN 3/22/93 2 , 2A E,QJOSEPH CALCALTERRA,III 097798 9201 EMPIRE AVE, EL PASOGASOLINE 12/17/90 2A , 6 E,QJOSIN PARTNERSHIP 097059 9609 CARNEGIE, EL PASOGASOLINE, DIESEL 9/21/90 2 , 2A E,QKOHLHAAS CORPORATION 092811 6831 EL PASO DR, EL PASOCHEMICAL 3/30/89 2 , 2A E,QLEE MOORE TRUST 100716 1855 LEE MOORE RD, SAN ELIZARIOGASOLINE 10/29/91 2 , 5 E,QLEO FEUERSTEIN 099371 9101 ROSEWAY, EL PASOUNKNOWN 6/27/91 2A , 1A E,QLOZOYA ROGELIO 097758 9951 ALAMEDA AVE, EL PASOGASOLINE 1/11/91 5B , 1A E,QTNRCC - 56

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236EL PASOPSTELLISENF/WSTPCD/ENFMAYFIELD POOLS 095170 1516 E SAN ANTONIO ST, EL PASOGASOLINE 3/9/90 2 , 5 E,QMBANK - EL PASO 099782 2800 N MESA, EL PASOUNKNOWN 8/5/91 2A , 6 E,QMERCHANTS FAST MOTOR LINES 096297 431 N CLARK DR, EL PASOGASOLINE 7/25/90 2 , 6 E,QNATIONAL CONVENIENCE STORES 097413 7088 DONIPHAN DR, CANUTILLOGASOLINE 12/4/90 5B , 2A E,QNATIONAL RESTAURANT SUPPLY 097812 320 W SAN ANTONIO ST, EL PASOGASOLINE 1/2/91 2 , 2A E,QNORMAN HADDAD 091805 3434 N MESA, EL PASOGASOLINE 3/29/88 2 , 3 E,Q* OASIS AVIATION INC112127 6701 CONVAIR RD, EL PASOUNKNOWN 2/18/97 2 , 6 E,QPETRO INC 101555 601 VINTON RD, ANTHONYDIESEL 1/10/92 2A , 6 E,QPHILLIPS 66 CO 111084 7800 E GATEWAY, EL PASOUNKNOWN 8/20/96 2 , 6 E,QRAYMOND ADAMS 111731 4760 DONIPHAN, EL PASOUNKNOWN 10/7/96 2 , 2A E,QRITCHIE DISTRIBUTING 102398 2631 E WYOMING, EL PASOCHEMICAL 3/25/92 2A , 1A E,QROADWAY EXPRESS INC 091214 1370 GOODYEAR DR, EL PASOUNKNOWN 1/26/87 2 , 6 E,QROBERT LANE 109351 4700 N DONIPHAN, EL PASOUNKNOWN 2/1/95 2 , 2A E,QROLLINS LEASING CORP 109027 8269 DONIPHAN, ANTHONYDIESEL 1/6/95 2 , 6 E,QSHARP OIL COMPANY 093785 7101 DONIPHAN DR, CANUTILLOGASOLINE 10/4/89 5B , 1A E,QSONYA SURRATT 097058 12850 ALAMEDA AVE, CLINTGASOLINE 10/17/90 2 , 2A E,QSOUTHLAND CORP 100715 429 YARBOROUGH, EL PASOGASOLINE 10/29/91 2 , 2A E,QSOUTHLAND CORP 106899 3101 YARBROUGH, EL PASOGASOLINE 6/24/93 2 , 2A E,QSOUTHLAND CORP 107846 6680 MONTANA, EL PASOGASOLINE 6/21/93 2 , 2A E,QSOUTHWEST CONVENIENCE STORES 108224 7150 ALAMEDA, EL PASOGASOLINE 6/1/94 2 , 2A E,QT M & S OIL CO 097626 6884 DONIPHAN DR, CANUTILLOGASOLINE, DIESEL 12/28/90 2 , 2A E,QTEXAS AGRICULTURAL EXPERIMENT 097522 10601 NORTH LOOP CIR, EL PASOGASOLINE 12/14/90 2A , 6 E,QTEXAS COMMERCE BANK, TRUSTEE 095371 600 E PAISANO, EL PASOGASOLINE 3/21/90 2 , 2A E,QTHE POPULAR DRY GOODS 095372 301 RAYNOLDS, EL PASODIESEL 3/29/90 2A , 6 E,QTM&S OIL COMPANY 093495 4048 DONIPHAN, EL PASOGASOLINE 7/27/89 2 , 2A E,QTOTAL PETROLEUM INC 107153 7046 1/2 ALAMEDA, EL PASOUNKNOWN 7/30/93 2 , 2A E,QTREE LAWN CORP 094393 3424 DONIPHAN DR, EL PASOGASOLINE 1/3/90 5B , 1A E,QTRITON AIR C/O DALLAS JET CTR 095171 6775 CONVAIR RD, EL PASOJET FUEL 3/12/90 2 , 6 E,QTXDOT 097973 9180 SOCORRO, EL PASODIESEL 2/11/91 2 , 2A E,QTXDOT 099519 6496 DONIPHAN DR, EL PASOCHEMICAL 7/1/91 2 , 2A E,QUNION PACIFIC RAILROAD CO 105145 COTTON, EL PASODIESEL 10/27/92 2 , 2A E,QUNIVERSITY OF TEXAS SYSTEM 092089 5001 ALAMEDA AVE, EL PASOGASOLINE 8/18/88 2 , 2A E,QUNKNOWN 108747 EL PASOWASTE OIL 10/17/94 1B , 1A E,Q* UNKNOWN112586 4700 BLK DURAZNO, EL PASOUNKNOWN 11/13/97 1B , 1A E,QUS ARMY AIR DEFENSE/FORT BLISS 111848 BLDG 2945, FORT BLISSGASOLINE, DIESEL 10/7/96 1B , 6 E,Q* US ARMY FORT BLISS092865 BLDG 1742, EL PASOGASOLINE 4/17/89 2A , 1A E,QUS POSTAL SERVICE 091103 5300 E PAISANO DR, EL PASOGASOLINE 8/6/86 2 , 2A E,Q* VELASCO EXXON096295 6200 E GTWY, EL PASOGASOLINE 4/23/90 2 , 2A E,QW TEXAS MEDICAL SPECIALIST INC 094867 2301 WYOMING, EL PASOGASOLINE 1/18/90 2 , 2A E,QYWCA 092154 1918 TEXAS AVE, EL PASOGASOLINE 9/22/88 2A , 2A E,QCENTERLINE INDUSTRIES 32306 1/2 MILE NORTH OF ENNIS ON OLD HWY 75MEK, TOLUENE, OTHERS 10/24/88 3B , 3 ECHAPARRAL STEEL 30661 300 WARD ROAD, MIDLOTHIANCHROMIUM, DIESEL 2/10/95 1 , 0 E,QFMC/AGRICULTURAL WHSE - ENNIS 30901 101 INDUSTRIAL BLVD, ENNISMETALS, PESTICIDES, BTEX 10/31/86 3B , 3 EQTXI (TEXAS INDUSTRIES) 33918 245 WARD ROAD, MIDLOTHIANELEVATED PH 11/19/92 2B , 5 ETNRCC - 57

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ELLISPCD/SUPTEXAS AMERICAN OIL STATE SUPERFUND SITE4 MILES N. OF MIDLOTHIAN ON OLD HWY. 67VINYL CHLORIDE,HYDROCARBONS5/2/85 5B , 2 E,Q,V,1,2,3ERATHPCD/VCPSTPSTLARKIN PRODUCTS INDUSTRIAL TRACTS 156 BUSINESS HIGHWAY 287 EAST, WAXAHACHIE SOLVENTS 12/28/95 0 , 6C EAVENUE FUEL DISTRIBUTORS 098295 407 W ENNIS AVE, ENNISGASOLINE 3/16/91 2 , 3 E,QBUILDERS TRANSPORT INC 095087 WARD RD, MIDLOTHIANDIESEL 1/1/77 2 , 4 E,QCHEMICAL RECLAMATION SER INC 096863 FM 55, AVALONGASOLINE 10/3/90 2A , 1A E,QCITY OF WAXAHACHIE 109484 400 E MADISON3, WAXAHACHIEGASOLINE 5/8/95 2 , 2A E,Q* ENNIS ISD108372 409 N CLAY 050196, ENNISGASOLINE 7/12/94 2 , 2A E,QENNIS TRANSPORTATION, INC. 105544 4001 N IH--45, ENNISUNKNOWN 12/7/92 2 , 2A E,QEXXON COMPANY USA 109285 101 N IH-45, ENNISGASOLINE 11/15/93 2 , 6 E,QFDIC 104801 301 N KAUFMAN, ENNISGASOLINE 9/30/92 1B , 1A E,QLADY PALMER ENTERPRISES 091180 100 E MAIN, ITALYGASOLINE 12/9/86 5B , 6 E,QLADY PALMER ENTERPRISES, INC. 096181 400 N HWY 77, WAXAHACHIEUNKNOWN 5/8/90 2A , 1A E,QM T MEHARG 102233 IH--35, ITALYGASOLINE 10/17/91 2A , 6 E,QMITCHELL MAYE 099669 401 W MAIN ST, WAXAHACHIEGASOLINE 7/27/91 2 , 2A E,Q* MRS. TROY DANIEL108304 800 WATER ST, WAXAHACHIEGASOLINE 6/24/94 2 , 2A E,QMULTIPLE RP'S POSSIBLE 100157 103 N 5TH ST, MIDLOTHIANGASOLINE 5/6/91 2A , 1A E,QNELSON-PUTMAN 102021 IH--45, ENNISGASOLINE 2/26/92 2 , 2A E,QONE STOP FOOD STORES 111706 E HWY 287, REAGOR SPRINGSGASOLINE 9/11/96 2 , 2A E,QONE STOP FOOD STORES INC 099130 HWY 45, ENNISGASOLINE 5/15/91 2 , 2A E,QPEARMAN OIL CO 094941 MAIN, MAYPEARLGASOLINE 3/12/90 2 , 2A E,QPEARMAN OIL CO 095673 101 WACO HIGHWAY ST, WAXAHACHIEGASOLINE 5/8/90 2 , 3 E,QPEARMAN OIL CO 096755 614 FERRIS AVE, WAXAHACHIEGASOLINE 9/13/90 2 , 2A E,QPEARMAN OIL CO 106556 111 N MAIN, RED OAKWASTE OIL, GASOLINE 3/25/93 2 , 2A E,Q* R A STILLER112250 200 S ELM, WAXAHACHIEGASOLINE 4/4/97 2 , 2A E,Q* R A STILLER112251 204 S ELM, WAXAHACHIEGASOLINE 4/4/97 2 , 2A E,Q* ROBERT MORRIS109284 400 W MAIN, WAXAHACHIEGASOLINE 12/2/94 2 , 2A E,QSTRASBURGER ENTERPRISES, INC. 097095 3RD, MAYPEARLGASOLINE 3/22/90 2 , 2A E,QTOTAL PETROLEUM INC 092550 200 DALLAS HWY, WAXAHACHIEGASOLINE 10/9/88 2A , 6 E,QTOTAL PETROLEUM INC 102073 100 N HWY 67 BYPASS, MIDLOTHIANGASOLINE, DIESEL 3/4/92 2A , 1A E,Q* TOWN & COUNTRY112603 610 W ENNIS AVE, ENNISGASOLINE 6/5/97 1B , 1A E,Q* TRIPLE A OIL CO INC107557 400 IH--45, FERRISGASOLINE, WASTE OIL 12/13/93 2 , 2A E,QTXDOT 099014 1000 JEFFERSON, WAXAHACHIEGASOLINE, DIESEL 5/15/91 2 , 6 E,QUNKNOWN 095672 HWY 66, WAXAHACHIEGASOLINE 5/8/90 2A , 2A E,QVARNER CITGO 103289 208 E MAIN, ITALYGASOLINE 5/29/92 2 , 6 E,QWAKELAND B D 103913 BOX 469, AVALONGASOLINE 7/21/92 2 , 2A E,Q* WAXAHACHIE ISD108375 300 BRYSON, WAXAHACHIEGASOLINE 7/13/94 2 , 2A E,QWINTERS OIL CO 100415 100 S KAUFMAN, ENNISGASOLINE 10/3/91 2 , 2A E,QWOODY PENNINGTON 111760 297 N HWY 67, MIDLOTHIANGASOLINE 10/9/96 2 , 2A E,Q* BROWDER 76 SUPREME111195 1421 S LOOP, STEPHENVILLEDIESEL 6/11/96 2 , 2A E,Q* CITY OF DUBLIN102310 200 S PATRICK, DUBLINGASOLINE 3/16/92 2 , 2A E,Q* GENE HARRIS PETROLEUM INC112832 2623 W WASHINGTON, STEPHENVILLEUNKNOWN 12/11/97 1B , 1A E,QKWIK GAS INC 092175 389 S GRAHAM ST, STEPHENVILLEGASOLINE 9/22/88 2A , 6 E,QTNRCC - 58

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ERATHFANNINPSTPSTFAYETTEPCD/VCFISHERFLOYDPSTPSTPST* R E MARTIN108838 265 E WASHINGTON ST, STEPHENVILLEGASOLINE 1/18/94 2A , 1A E,Q* TXDOT097057 302 MORGAN MILL, STEPHENVILLEDIESEL, KEROSENE 9/27/90 2 , 2A E,QCHAPMAN INC 102096 720 SAM RAYBURN, BONHAMGASOLINE 3/5/92 2 , 2A E,QCIRCLE K STORES INC 110134 510 W SAM RAYBURN, BONHAMGASOLINE 4/21/95 2 , 2A E,QHALL-VOYER FOUNDATION 103769 205 E MAIN, HONEY GROVEGASOLINE 6/23/92 2 , 6 E,QSAM RAYBURN MEMORIAL VET CTR 105233 1201 E 9TH ST, BONHAMGASOLINE 11/5/92 2A , 1A E,Q* TUBOSCOPE SCHULENBURG SITE558 HIGH HILL ROAD, SCHULENBURGMETALS, VOC 7/1/97 0 , 2 ECIRCLE K CORP 107260 500 W TRAVIS, LA GRANGEGASOLINE 9/16/93 2 , 2A E,QFARMCO INC 110352 138 JEFFERSON, LA GRANGEGASOLINE 11/28/95 2A , 1A E,QFAYETTE COUNTY 107588 216 N MARKET ST, FLATONIAGASOLINE 1/3/94 2 , 2A E,QFAYETTE COUNTY PCT. 4 108255 W HWY 90, SCHULENBURGDIESEL, GASOLINE 5/20/94 2 , 2A E,QJOHN FIETSAM 102684 IH--10, SCHULENBURGGASOLINE 3/1/92 2 , 2A E,Q* JOHN FIETSAM INC112489 401 N JEFFERSON, LA GRANGEGASOLINE, DIESEL 7/2/97 2 , 2A E,Q* LA GRANGE ISD112226 815 S VAIL ST, LA GRANGEGASOLINE, DIESEL 3/27/97 2 , 2A E,QLA GRANGE PETROLEUM INC 097762 103 N WATERS, LA GRANGEGASOLINE 1/16/91 2 , 2A E,Q* LA GRANGE STATE BANK112045 E HWY 71, ELLINGERGASOLINE 8/12/96 2 , 2A E,Q* MUTSCHER INC112471 HWY 77, LA GRANGEUNKNOWN 7/16/97 1B , 1A E,QOAKRIDGE SMOKEHOSUE FRANS INC 093928 HWY 77, SCHULENBURGGASOLINE 9/27/89 2 , 2A E,Q* PT.OFCONT.-FARMERS LUMBERCOINC103740 547 E TRAVIS ST, LA GRANGEGASOLINE, DIESEL 5/4/92 2 , 2A E,QSCHMIDT & SONS OIL CO. 096647 157 E TRAVIS, LA GRANGEGASOLINE 9/4/90 2 , 2A E,QSTOCKMAN TRAVEL CENTER 110844 HWY 95, FLATONIAGASOLINE, DIESEL 4/18/96 2 , 6 E,QTHE HITCHING POST INC 095276 IH--10, SCHULENBURGGASOLINE 1/9/90 2 , 6 E,QW M WOTIPKA JR 108543 312 E NORTH MAIN, FLATONIAGASOLINE 8/10/94 2 , 2A E,QWAYNE WAGNER 108017 HWY 237, ROUND TOPGASOLINE 2/23/94 2 , 2A E,QWEISHUHN CHARLES 103741 881 E COLORADO, LA GRANGEGASOLINE, DIESEL 5/4/92 2 , 6 E,QWICKETT STEVE 100062 HWY 237, WARRENTONGASOLINE 9/9/91 5B , 1A E,Q* WILBORN PETROLEUM CO110237 IH-10, SCHULENBURGGASOLINE 12/2/95 2 , 2A E,QBILL BURNS OIL CO 111314 701 N CLEVELAND, ROTANGASOLINE 6/20/96 2 , 2A E,QBRAZOS INC SUBSIDIAIROES 094313 E HWY 70, ROTANDIESEL 12/14/89 2 , 2A E,QTXDOT 102168 HWY 180, ROBYUNKNOWN 12/13/91 2 , 2A E,QCRUME GIN 093758 RT 1, LOCKNEYGASOLINE 8/7/89 2 , 2A E,Q* ERIC CORNELIUS112049 420 S 2ND, FLOYDADAGASOLINE, DIESEL 1/7/97 2 , 5 E,QI H PARKS 091849 RAILROAD, SOUTH PLAINSGASOLINE 4/19/88 5B , 1A E,QMARY HUTTON TEXACO-DECEASED 093759 205 E LOCUST, LOCKNEYGASOLINE 8/7/89 2A , 1A E,QPAYMASTER SEED-FARM 093519 FM 2301, AIKENDIESEL 8/14/89 2A , 2A E,QPRODUCERS COOPERATIVE ELEVATOR 109688 210 E MISSOURI, FLOYDADAGASOLINE 7/11/95 2 , 2A E,Q* TXDOT102291 708 N 2ND, FLOYDADAGASOLINE, DIESEL, WASTE OIL 3/18/92 2 , 2A E,QTNRCC - 59

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236FLOYDFOARDPSTPSTFORT BENDENF/WSTIHWMSWPCD/CAPCD/VCPSTWEEMS TEXACO 097404 607 E HOUSTON, FLOYDADAGASOLINE, WASTE OIL 11/9/90 2 , 2A E,QALLSUP PETROLEUM, INC. 093386 COMMERCE, CROWELLGASOLINE 7/6/89 2 , 2A E,Q* PHILLIPS 66 CO108958 S 1ST ST, CROWELLUNKNOWN 10/1/91 2 , 2A E,QANALYSTS SERVICES, INC. 71235 12715 ROYAL DR., STANFORDTOLUENE, TCE BENZENE 2/20/90 3C , 5 EQ2INTERNATIONAL SWITCHBOARD CORPORATION 33451 910 INDUSTRIAL BOULEVARD, SUGARLANDVOC'S (CHLORINATED,NON- 6/18/91 3B , 2B EQCHLORINATEQUANEX CORPORATION 30008 SCOTT ROAD, ROSENBERGMETALS 1/1/88 3A , 4,5 E,Q,V,2,3FORT BEND COUNTY: MW-6A, 6B, AND 7, PZ-17AND 18.MSW01554 1.5 MI. NW OF THE INTERSECTION OF US 59 AND VOCs (TCE, VINYL CHLORIDE, 1,2-STATE HWY 36, 0.25 MI. W OF THE INTERSECTION OF DICHLOROETHANE, AND 1,1-KLAUKE RD. AND BLUME RD., N OF KLAUKE RD. DICHLOROETHANE).8/31/94 2B , 5 E,Q,V,2SUGARLAND PROPERTIES 52121 SWEETWATER BLVD., SUGARLANDARSENIC, CADMIUM, CHROMIUM, 6/1/91 1B , 1A EQV23COPPER, LEADTEXAS INSTRUMENTS - STAFFORD 30703 12201 SW FREEWAY, HOUSTONSOLVENTS 12/1/83 2B , 5 EQV23VISION METALS 30008 SCOTT ROAD, ROSENBERGMETALS 1/1/88 3A , 5 E,Q,V,2,3* ATEC COMMERCIAL SYSTEMS PROPERTY 585 12600 EXECUTIVE DRIVE, STAFFORDCHLORINATED SOLVENT 8/6/97 0 , 4 E* FOUNTAINS PROPERTY584 EXECUTIVE DRIVE, STAFFORDCHLORINATED SOLVENTS 8/6/97 0 , 6 E* TEXAS INSTRUMENTS - STAFFORD FACILITIES 625 12201 SOUTHWEST FREEWAY, STAFFORDVOCS 10/27/97 0 , 2 ECOASTAL MAVERICK 092370 7101.5 W FUQUA, MISSOURI CITYGASOLINE 11/29/88 2 , 2A E,QCONOCO 109757 502 MURPHY RD, STAFFORDGASOLINE 8/8/95 2 , 2A E,QDAG MANAGEMENT 093020 1900 FM 1092, MISSOURI CITYGASOLINE 5/16/89 2 , 4 E,Q* DIAMOND SHAMROCK111687 3303 HWY 6, SUGARLANDGASOLINE 7/31/96 1B , 1A E,QDURWOOD GREENE CONSTRUCTION 103838 10126 CASH RD, STAFFORDGASOLINE 7/13/92 2A , 2A E,QFLINTEX OIL CO 111555 3416 1ST ST, ROSENBERGGASOLINE 8/21/96 2 , 2A E,Q* FORT BEND COUNTY EMS112266 1514 SOUTH PARKWAY, SUGAR LANDDIESEL 4/14/97 2 , 2A E,QFORT BEND SHERIFFS DEPT 102802 1410 RANSOM RD, RICHMONDGASOLINE 4/3/92 2 , 2A E,QGTE TELEPHONE OPERATIONS 099060 207 BRAND RD, STAFFORDGASOLINE 8/24/90 2 , 2A E,QHALLIBURTON SERVICES 109188 330 SYCAMORE ST, FRESNOGASOLINE, DIESEL 2/20/95 2 , 2A E,QHOUSTON LIGHTING & POWER 091414 Y U JONES, THOMPSONSDIESEL 8/1/87 2 , 4 E,QHOUSTON LIGHTING & POWER 093144 13300 BELKNAP RD, SUGARLANDGASOLINE 6/15/89 2A , 6 E,QHUGHES, DON 102044 12406 GREENWAY DR, SUGARLANDGASOLINE 9/30/91 2 , 2A E,QIMPERIAL HOLLY CORP 097952 198 KEMPNER ST, SUGARLANDGASOLINE 1/21/91 2 , 2A E,Q* JOHN HOLLAND CONSTRUCTION110335 10635 BRIGHTON LN, STAFFORDGASOLINE, DIESEL 11/6/95 2 , 2A E,Q* KMS KWICK STOP095714 909 CRABB RIVER, RICHMONDGASOLINE 3/9/90 2 , 2A E,QMOBIL OIL CORP 091833 3311 S MAIN, STAFFORDGASOLINE 4/28/86 2 , 4 E,QMOBIL OIL CORP 097416 12602 HWY 59, STAFFORDGASOLINE 11/21/90 2 , 6 E,QMOBIL OIL CORP/SHELL OIL CO 102058 13747 SOUTHWEST FWY, SUGARLANDUNKNOWN 12/17/91 2 , 2A E,QRIVER BEND COUNTRY CLUB 101225 1214 DULLES AVE, SUGARLANDGASOLINE 12/15/91 2A , 6 E,QTNRCC - 60

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236FORT BENDPSTFRANKLINPSTFREESTONEENF/WSTFRIOGAINESPCD/SUPPSTPSTWQDPCD/SUPPSTSHELL OIL CO 104401 3310 S MAIN, STAFFORDGASOLINE 11/1/91 2 , 6 E,QSTAR ENTERPRISE 103807 2465 FM 1092, MISSOURI CITYGASOLINE, WASTE OIL 9/11/91 2 , 2A E,Q* STAR ENTERPRISE112263 2995 DULLES, MISSOURI CITYGASOLINE 4/22/97 2 , 2A E,QSUGARLAND TEXACO 100958 8102 HWY 90A, SUGARLANDGASOLINE, DIESEL 10/29/91 2 , 6 E,QULTRAMAR DIAMOND SHAMROCK 110827 3001 AVE H, ROSENBERGUNKNOWN 4/18/96 2 , 2A E,QUNITED PARCEL SERVICE 091288 13922 STAFFORD RD, STAFFORDDIESEL 4/20/87 2 , 5 E,Q* VAUGHAN FAMILY PROPERTIES110548 5727 HWY BLVD, KATYUNKNOWN 3/11/96 2 , 2A E,QWRUCK G R 106451 HWY 36, NEEDVILLEGASOLINE 4/5/93 2 , 6 E,QBOLIN OIL CO 105727 S HWY 37, MT VERNONGASOLINE 10/21/92 2A , 6 E,QFRANKLIN COUNTY FEED & SUPPLY 094911 201 W MAIN, MT VERNONGASOLINE 2/6/90 2A , 6 E,QMT VERNON FLOORS & MORE 104142 609 W IH--30, MT VERNONGASOLINE 8/6/92 2 , 6 E,QD & D CENTRAL TEXAS CONSTRUCTION CO. 52026 ROUTE 1, TEAGUEPCB'S 7/13/92 2D , 1A EQD & D CENTRAL TEXAS CONSTRUCTION CO. 52026 ROUTE 1, TEAGUEPCB'S 7/13/92 2D , 0 E,QAWALT WHOLESALE 111452 733 E COMMERCE, FAIRFIELDGASOLINE 12/23/96 2 , 2A E,Q* AWALT WHOLESALE111742 200 N 4TH, TEAGUEUNKNOWN 8/20/96 2 , 2A E,Q* AWALT WHOLESALE112541 690 W HWY 84, FAIRFIELDGASOLINE 6/13/96 1B , 1A E,QBUSH & BAILEY INC 100518 HWY 179, DEWGASOLINE, DIESEL 10/31/91 2A , 1A E,QEXXON COMPANY USA 095818 685 W HWY 84, FAIRFIELDGASOLINE 5/22/90 2 , 2A E,Q* JFM INC095819 HWY 84, FAIRFIELDGASOLINE 5/24/90 2 , 2A E,Q* DILLARD BROTHERS111521 HWY 81, DILLEYUNKNOWN 8/22/96 2 , 2A E,Q* RON PETTY112242 1229 S OAK, PEARSALLUNKNOWN 4/16/97 1B , 1A E,Q* PEDECO, INCSE OF PEARSALLCRUDE OIL 7/27/97 1B , 2B E,QSEMINOLE FLYING SERVICETXD981918121JUNCTION OF HWYS. 385 AND 180, SEMINOLETOXAPHENE 2/20/90 1B , 1A EEDDINS WALCHER CO 100512 704 RAILROAD AVE, SEAGRAVESGASOLINE 10/2/91 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 097585 105 INDUSTRIAL AVE, SEAGRAVESDIESEL 12/14/90 2A , 6 E,QRIO GRANDE DISTRIBUTORS INC 097673 501 E LAMESA HWY, SEMINOLEGASOLINE 12/14/90 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 099338 306 W AVE A, SEMINOLEGASOLINE 6/13/91 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 100104 12TH ST, SEAGRAVESGASOLINE 9/5/91 2 , 2A E,QSEAGRAVES ISD 097943 1300 AVE K, SEAGRAVESGASOLINE 2/5/91 2 , 2A E,QSEMINOLE ISD 095184 701 NE AVE F, SEMINOLEGASOLINE 3/19/90 2 , 6 E,QSTATELINE OIL CO 099418 HWY 62, SEMINOLEGASOLINE 6/18/91 2 , 5 E,QTHE FUEL COMPANY INC 093040 1300 HOBBS HWY, SEMINOLEDIESEL 4/24/89 5B , 1A E,QTNRCC - 61

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GAINESPSTGALVESTONENF/WSTIHWPCD/CAPCD/ENFPCD/SUPPCD/VCTOWN & COUNTRY FOOD STORES 100106 1001 RAILROAD AVE, SEAGRAVESGASOLINE 9/4/91 2 , 2A E,QTXDOT 102723 S HWY 180, SEMINOLEGASOLINE, DIESEL, KEROSENE 3/27/92 2 , 2A E,Q* WALKER SIMS OIL CO INC103711 401 S MAIN, SEMINOLEGASOLINE 6/23/92 2 , 2A E,Q* AMOCO CHEMICAL CO. - TEXAS CITY (PLT A) 32297 END OF 6TH STREET SOUTH, TEXAS CITYBTEX 12/31/94 3B , 2A EQVAMOCO OIL CO. - TEXAS CITY REFINERY 30139 2401 5TH AVE S & 900 GRANT AVE, TEXAS CITY BTEX,HYDROCARBONS 1/23/84 3B , 2A E* INTERCOASTAL TERMINAL, INC.30773 1536 TEXAS AVENUE, TEXAS CITYCR,TPH 8/4/97 3b , 5 EQMALONE SERVICE COMPANY 34410 5300 CAMBELL BAYOU ROAD, TEXAS CITYORGANICS 10/1/79 3C , 2B EQMARATHON OIL CO. 30326 1320 LOOP 197 SOUTH, TEXAS CITY, TX 7759HYDROCARBONS 12/31/89 2A , 2 ESTERLING CHEMICAL, INCORPORATED 30285 BAY ST. AND 2ND AVE., SOUTH, TEXAS CITYCR, PB, AS 12/1/88 3 , 3 EQUNION CARBIDE - TEXAS CITY 30689 STATE HWY 146 AT FM 1765, SW OF TEXAS CITY CHLORINATED HC'S,DICHLORO:ETHANE, PROPA12/3/90 4B , 3 EQ* STERLING CHEMICAL30285 BAY ST. AND 2ND AVE., SOUTH, TEXAS CITYCR,PB,AS 12/1/88 3A , 2A E,Q,VUNION CARBIDE & GCWDA - TEXAS CITY 30689 JUNCTION OF HWY'S 519 & 146CHLORINATED HC'S,DICHLORO:ETHANE, PROPANE,NAPTHALENE, BENZENEUNION CARBIDE - TEXAS CITY 35921 2800 LOOP 197 S OF TEXAS CITYNAPTHALENE, BENZENE,DICHLORO:ETHYL ETHER,ETHANE, PROPANE12/3/90 3A , 3,4,5 E,Q,V,212/14/87 3A , 3,4,5 E,Q,V,2AMOCO OIL CO. - TEXAS CITY REFINERY 30139 2401 5TH AVE S & 900 GRANT AVE, TEXAS CITY BTEX, HYDROCARBONS 1/23/84 3B , 3 EMALONE SERVICE CO 34410 800 CAMPBELL BAYOU RD, TEXAS CITYORGANICS 7/30/82 2 , 2 EMOBIL, GALVESTON (BULK PLANT 42-183) T0029 101 FRIENDSWOOD, GALVESTONBTEX, HYDROCARBON SHEEN ONWATER11/1/90 2 , 2 EMONSANTO - NORTH 80 E,W 39121 BAY ST, TEXAS CITYNAPHTHALENE, VOCS 6/2/82 2B , 4 ESTERLING CHEMICAL (2) 30285 BAY ST. AND 2ND AVE., SOUTH, TEXAS CITYCR, PB, AS, BTEX, PAHS, VINYL 12/1/88 2,3 , 2,3 E,QCHLORIDE, VOCSUNION CARBIDE & GCWDA - TEXAS CITY 30689 JUNCTION OF HWY'S 519 & 146CHLORINATED HC'S,DICHLORO:ETHANE, PROPANE,NAPTHALENE, BENZENEUNION CARBIDE - TEXAS CITY 35921 2800 LOOP 197 S OF TEXAS CITYNAPTHALENE, BENZENE,DICHLORO:ETHYL ETHER,ETHANE, PROPANE12/3/90 3A , 3,4 E,Q,V,212/14/87 3A , 2,3,4 E,Q,V,2KELLEY PITS, H.G. (MARATHON MORCO) 39983 20TH ST. AND SH 3, DICKINSONMISC INDUSTRIAL WASTES 2B , 5PHIBRO ENERGY USA (HILL) - TEXAS CITY 30011 SH 197 AT 14TH ST, S OF TEXAS CITY1,2-DCE 8/16/88 2A , 2A E YHALL STREET SUPER FUND SITE (DICKINSON TXD9807507 NEXT TO DICKINSON LANDFILL ON HALL ST,CHLOROBENZENE 7/23/87 5B , 2 E,Q,V,2,3LANDFILL)23DICKINSON. A STATE SUPERFUND SITE (1987)MOTCO INC. SUPERFUND SITE NEAR JUNCTION OF STATE HWY. 3 AND GULF FRWY.(I-45) IN LA MARQUE, TX. BOUNDED ON THE EAST BYSTATE HWY.3ORGANIC CHEMICALS 5A , 4 E,Q,V,2,3TEX TIN PROPOSED NPL SUPERFUND SITETEXAS CITY, S.E. OF INTERSECTION OF FM 519 ANDSH 146ARSENIC, CADMIUM, LEAD,ORGANIC CHEMICALS, NORM5/24/91 5A , 3 E,Q,V,2,3AMOCO CHEMICAL COMPANY 220 2800 FM 519 EAST, TEXAS CITYMETALS 4/1/96 0 , 4 E* CHEVRON BULK PLANT #60165535509 1802 WATER STREET, GALVESTONHYDROCARBONS 4/22/97 0 , 6 E* EDGEWOOD RETIREMENT COMMUNITY416 2228 SEAWALL BOULEVARD, GALVESTONVOCS 12/10/96 0 , 2 ETNRCC - 62

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GALVESTONPCD/VCPSTFALSTAFF BREWING COMPANY 337 33RD STREET AND CHURCH STREET, GALVESTON PCBS, TPH 9/9/96 0 , 2 E* JOE LEE'S SEAFOOD RESTAURANT451 104 KIPP, KEMAHTPH, PAHS 1/23/97 0 , 1 ELEAGUE CITY SPECIALTY SHOPPING CENTER 122 101-199 GULF FREEWAY SOUTH, LEAGUE CITY VOCS, TPH 9/21/95 0 , 6C E* ABAD ELISEO111056 202 WATER ST, GALVESTONGASOLINE, WASTE OIL 2/13/96 2 , 4 E,QABC GROCERY 107574 11128 FM 3005, GALVESTONGASOLINE 12/17/93 2A , 6 E,Q* BAY OIL CO099256 7727 HWY 6, HITCHCOCKGASOLINE, WASTE OIL 6/4/91 2 , 2A E,QBAY OIL CO 103985 7320 HWY 1765, TEXAS CITYGASOLINE, WASTE OIL 2/11/92 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY108521 101 S PARKWOOD, FRIENDSWOODGASOLINE 12/17/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110478 4328 IH-45, LA MARQUEGASOLINE 2/7/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110479 2502 BROADWAY, GALVESTONGASOLINE 2/12/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110484 3301 AVE J, GALVESTONGASOLINE 2/15/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110564 6102 STEWART RD, GALVESTONGASOLINE 3/5/96 2 , 2A E,QCHEVRON USA 111871 3136 FM 528, FRIENDSWOODGASOLINE 11/13/96 2A , 6 E,QCITY OF GALVESTON 096359 NEW AIR LOGISTIC, GALVESTONGASOLINE, DIESEL 7/5/90 2A , 1A E,QCITY OF LA MARQUE 096537 1500 MUNICIPAL DR, LA MARQUEGASOLINE 5/22/90 2 , 2A E,QCOASTAL STATES 094627 700 S 14TH ST, TEXAS CITYCHEMICAL 2/13/90 1B , 1A E,QCOLUMBIA SAVINGS 099219 3826 BROADWAY, GALVESTONGASOLINE, WASTE OIL 6/11/91 2 , 6 E,QCOOK ROBERT 102043 305 W 20TH ST, TEXAS CITYDIESEL 1/15/92 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099996 2517 BROADWAY, GALVESTONGASOLINE 8/12/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 103918 3927 BROADWAY, GALVESTONGASOLINE 1/15/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 108245 6302 STEWART, GALVESTONGASOLINE 9/16/83 2 , 2A E,QDICKINSON ISD 093854 3319 OWENS DR, DICKINSONGASOLINE 10/5/89 2A , 6 E,QDOANE ERIC 103722 601 N 6TH ST, TEXAS CITYGASOLINE, WASTE OIL 7/2/92 2 , 2A E,QDR PEPPER BOTTLING CO OF TEXAS 107403 8000 BROADWAY, GALVESTONDIESEL 3/2/93 2A , 1A E,QE Z SERVE INC 111709 8027 PORT INDUSTRIAL BLVD, GALVESTONGASOLINE 9/6/96 2 , 2A E,QE Z SERVE MANAGEMENT 109416 8227 STEWART RD, GALVESTONGASOLINE 3/21/95 2 , 2A E,QEVANS OIL CO 096474 8150 PALMER HWY, TEXAS CITYGASOLINE 6/8/90 2 , 3 E,Q* EVANS OIL CO108157 4210 41ST ST, DICKINSONGASOLINE 3/9/94 2 , 2A E,Q* EVANS SYSTEMS INC112555 3115 HWY 6 BAYOU VISTA, HITCHCOCKGASOLINE 8/15/97 1B , 1A E,QEXXON COMPANY USA 105501 4502 SEAWALL BLVD, GALVESTONUNKNOWN 10/12/90 2 , 2A E,QEXXON COMPANY USA 106926 5028 BROADWAY, GALVESTONGASOLINE, WASTE OIL 7/9/93 2 , 2A E,QEXXON COMPANY USA 108234 6026 SEAWALL BLVD, GALVESTONGASOLINE 6/3/94 2 , 2A E,QEXXON COMPANY USA 111898 1700 W MAIN, LEAGUE CITYGASOLINE, WASTE OIL 1/8/96 2 , 2A E,Q* FEDERATED108005 21 S 21ST ST, TEXAS CITYGASOLINE 3/15/94 2 , 2A E,QFLOYD STAPLETON 095142 1830 N 25TH AVE, TEXAS CITYGASOLINE 3/15/90 5B , 1A E,QGALVESTON COUNTY 105209 2020 AVE I, GALVESTONDIESEL 10/26/92 2 , 2A E,Q* GROCERS SUPPLY CO INC111450 7728 HWY 6, HITCHCOCKGASOLINE, DIESEL 6/22/96 2 , 2A E,QHOUSTON LIGHTING & POWER 091911 502 27TH ST, GALVESTONGASOLINE 2/12/88 2 , 6 E,QIMPERIAL HOLLY CORP 108321 THEAD PIER 35/36, GALVESTONUNKNOWN 3/30/94 2A , 1A E,QJACK MILLER 108582 402-424 THIRTIETH STREET, GALVESTONGASOLINE 9/1/94 2 , 5 E,QLEE MU QUAN 093327 1331 9TH AVE, TEXAS CITYGASOLINE 6/15/89 2 , 6 E,QMAINLAND CONSTRUCTION CO 097484 1124 S 3RD AVE, TEXAS CITYDIESEL 12/4/90 2 , 2A E,QMOBIL OIL CORP 094793 3428 SEAWALL BLVD, GALVESTONGASOLINE 11/15/89 2 , 4 E,QMOBIL OIL CORP 095138 1326 N 9TH AVE, TEXAS CITYGASOLINE 3/15/90 2 , 4 E,QMOBIL OIL CORP 102097 1902 AVE J, GALVESTONUNKNOWN 12/24/91 2 , 5 E,QMOBIL OIL CORP 102629 6027 STEWART RD, GALVESTONGASOLINE 12/11/91 2 , 4 E,Q* MOHAMMAD OSCAR093492 502 FERRY RD, GALVESTONGASOLINE 8/10/89 1B , 1A E,QTNRCC - 63

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GALVESTONPSTGARZAPSTGILLESPIEPSTMOROVICH LEO 107249 3425 BROADWAY, GALVESTONGASOLINE 9/14/93 2 , 2A E,Q* NATIONAL CONVENIENCE BANKRUPT112559 1916 MAGNOLIA, LA MARQUEGASOLINE 7/30/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112560 7802 HWY 6, HITCHCOCKGASOLINE 7/29/97 5B , 1A E,QNATIONS BANK TX - J CELLI EST 106758 2902 SEAWALL BLVD, GALVESTONGASOLINE 4/25/93 2 , 6 E,QROBY R BURKETT 109516 2800 GULF FREEWAY, LA MARQUEGASOLINE 11/30/94 2 , 2A E,Q* SANTA FE ISD111938 3706 JACKSON, SANTA FEDIESEL 11/11/96 2 , 2A E,QSHELL OIL CO 095147 101 S FRIENDSWOOD, FRIENDSWOODGASOLINE 12/27/89 2 , 6 E,QSOUTH SHORE HARBOR MARINA 096773 2400 S SHORE BLVD, LEAGUE CITYDIESEL 9/20/90 2 , 6 E,QSOUTHLAND CORP 104783 2501 BROADWAY, GALVESTONGASOLINE 8/21/92 2 , 2A E,QSOUTHLAND CORP 109990 711 TEXAS AVE, TEXAS CITYGASOLINE 10/2/95 2 , 2A E,Q* STAR ENTERPRISE104356 5202 FM 1765, TEXAS CITYGASOLINE 7/28/92 2 , 2A E,QTEXAS CITY ISD 101877 101 N 9TH ST, TEXAS CITYGASOLINE 9/3/91 2A , 6 E,Q* TRI CON OIL104103 HWY 87, CRYSTAL BEACHGASOLINE 7/23/92 2 , 2A E,QUNITED PARCEL SERVICE 103663 10 MAIN, LA MARQUEGASOLINE, WASTE OIL 7/1/92 2 , 6 E,QUNIVERSITY OF TEXAS MEDICAL 093697 700 STRAND, GALVESTONUNKNOWN 9/19/89 1B , 6 E,QUNKNOWN 091475 HWY 3, DICKINSONGASOLINE 9/22/87 2 , 2A E,QWESTERLAGE CHARLES 098511 1230 HWY 3, LA MARQUEGASOLINE 4/2/91 2 , 2A E,QBALCH OIL CO 100127 HWY 84, SOUTHLANDGASOLINE, DIESEL 9/4/91 2 , 2A E,Q* MITCHELL JAMES101747 HWY 84, POSTGASOLINE 10/28/91 2 , 2A E,Q* MRS E D CAYLOR110636 301 S BROADWAY, POSTUNKNOWN 4/9/96 2 , 2A E,QPOST ECONOMIC DEVELOPMENT CORP 094596 MILL RD, POSTGASOLINE 1/25/90 2A , 2A E,QPOST ISD 109728 W 7TH, POSTGASOLINE 7/20/95 2 , 2A E,Q* PRO PETROLEUM INC112858 102 N BROADWAY, POSTGASOLINE 12/19/97 1B , 1A E,QRIP GRIFFIN TRUCK SER CTR INC 108680 201 S BROADWAY, POSTGASOLINE 9/29/94 2 , 2A E,QTOWNSEND STRONG INC 094556 402 S BROADWAY, POSTGASOLINE 1/11/90 2 , 2A E,Q* TOWNSEND STRONG INC112212 101 N BROADWAY, POSTUNKNOWN 4/4/97 2 , 2A E,QTXDOT 102504 705 S BROADWAY, POSTGASOLINE, DIESEL 3/25/92 2 , 2A E,Q* WALKER SIMS OIL CO INC106601 300 N BROADWAY, POSTGASOLINE 4/27/93 2 , 2A E,Q* ALTON L KLEIN110176 HWY 290, STONEWALLGASOLINE 11/13/95 2 , 2A E,QCRENWELGE MOTORS 107580 413 W MAIN, FREDERICKSBURGGASOLINE 12/3/93 2 , 2A E,QCRENWELGE MOTORS 107581 401 W MAIN, FREDERICKSBURGGASOLINE 12/3/93 2A , 1A E,QCRENWELGE OIL CO 097352 713 W MAIN ST, FREDERICKSBURGGASOLINE 11/16/90 2 , 2A E,Q* CRENWELGE OIL CO098731 722 S WASHINGTON, FREDERICKSBURGGASOLINE 10/14/90 2 , 2A E,QECKERT & SONS INC 104874 W HWY 290, STONEWALLGASOLINE 9/18/92 5B , 2A E,QEDWARD M BAILEY 107254 HWY 290, HARPERGASOLINE 8/27/93 5B , 1A E,QHEIN OIL CO 097494 406 E MAIN ST, FREDERICKSBURGGASOLINE 12/7/90 2 , 4 E,QKGS PARTNERS, LTD. 108200 415 E MAIN, FREDERICKSBURGGASOLINE 4/7/94 2A , 1A E,QLEO JONES OIL CO 091548 308 N LLANO ST, FREDERICKSBURGGASOLINE 11/17/87 2A , 4 E,QMCKAY STATION 107085 N PARK, HARPERGASOLINE 7/23/93 5B , 1A E,QPIONEER OIL COMPANY 092780 HWY 290, FREDERICKSBURGGASOLINE 4/4/89 2 , 2A E,QSTROEHER & SON INC 100308 401 E MAIN, FREDERICKSBURGGASOLINE 9/19/91 2 , 2A E,QSTROEHER & SON INC 110238 509 S ADAMS, FREDERICKSBURGGASOLINE 12/18/95 2 , 2A E,Q* STROEHER & SON INC112204 119 E PARK ST, FREDERICKSBURGGASOLINE, DIESEL 3/20/97 2 , 2A E,QWALLACE OTTMERS CHEVRON 110643 616 E MAIN, FREDERICKSBURGUNKNOWN 3/20/96 2 , 6 E,QTNRCC - 64

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GILLESPIEPSTGOLIADWQDPSTGONZALESPSTGRAYENF/WSTIHWPCD/CAPSTWUDGRAYSONENF/WSTPCD/CAPCD/VCWILLIAM ROEDER 103311 402 E MAIN, FREDERICKSBURGGASOLINE, DIESEL, WASTE OIL 4/28/92 2 , 2A E,QWUNDERLICH READY-MIX INC 101406 204 E UFER, FREDERICKSBURGDIESEL 1/7/92 5B , 1A E,QSTAFFORD EF9105007 LOWER CRABAPPLE ROAD, NORTH OFNITRATES 5/1/91 2D , 2B Q,V,2FREDERICKSBURGHOFF BYRON 102596 RT 3, SCHROEDERGASOLINE 4/6/92 2A , 6 E,QLORINE BAUCH 093636 HWY 59, GOLIADGASOLINE 9/18/89 5B , 2A E,QROLAND G RIEDESEL INC 109428 HWY 119, WEESATCHEGASOLINE, DIESEL 3/15/95 2A , 1A E,Q* TEXAS STAR INVESTMENTS111033 100 S JEFFERSON, GOLIADUNKNOWN 5/21/96 2 , 2A E,QCINCO J INC 111379 1315 SEYDLER RD, GONZALESUNKNOWN 7/31/96 2 , 2A E,Q* H E BUTT GROCERY CO112227 226 ST JOSEPH ST, GONAZLESUNKNOWN 4/4/97 2 , 2A E,Q* JOHN FIETSAM INC112358 IH 10, WAELDERGASOLINE, DIESEL 6/4/97 2 , 2A E,QHOECHST CELANESE CORPORATION - PAMPA 30072 US 60 5 MILES SW OF PAMPABENZENE, ACETONE, MTBE 5/6/92 2C , 4 EQV* HOECHST CELANESE - PAMPA (2)30072 5 MILES SW OF PAMPA ON US 60BENZENE, MTBE, ACETONE 5/6/92 3A , 4,5 E,Q,V,1HOECHST CELANESE - PAMPA (2) 30072 5 MILES SW OF PAMPA ON US 60BENZENE, MTBE, ACETONE 5/6/92 2C , 4 E,Q,V,1CROCKETT EXXON 097200 HC 4, ALLANREEDGASOLINE 10/11/90 5B , 1A E,QE Z SERVE MANAGEMENT CO 111657 201 E 2ND, LEFORSGASOLINE 9/6/96 2 , 2A E,QGRAY COUNTY 102652 MAGNOLIA, PAMPAGASOLINE 4/8/92 2 , 2A E,QMOJAVE PETROLEUM CO 099605 821 W BROWN, PAMPAGASOLINE 7/21/91 2 , 6 E,QI-R-I INTERNATIONAL 0900012 WELL 5 (G0900012A) - 0.5 MILE NE OF KINGSMILL TRICHLOROETHENE 5/16/90 2C , 5 E,Q,V,2CAMPKRAFT FOOD INGREDIENTS CORP. 30940 1201 E PECAN STREET, SHERMANTPH 12/21/89 2C , 6 EQSMITH, W. J. WOOD PRES. (MKT RAILROAD) 31332 1700 WEST MORTON ST, DENISONCREOSOTE, NAPTHALENE,1/20/88 3D , 2A EQPHENOL, BENZENE, EGRAYSON COUNTY AIRPORT (FORMERLYPERRIN AFB)52042 4700 AIRPORT DR., DENISONACID, ASSOC. MINERALS,ORGANICS5/1/91 1B , 2A E,Q,V,2TEXAS INSTRUMENTS - SHERMAN 30427 6400 HWY. 75 SOUTHSOLVENTS, DIESEL 6/1/88 2B , 4 E,Q,V,2UNION PACIFIC RAILROAD T0500 RAY DRIVE RAILYARD, DENISONTPH 5/9/95 0 , 5 E* C. D. LOE, ANCHOR RANCH524 ROUTE 3, BOX 513A, CEMETERY ROAD, POTTSBORO BENZENE 5/14/97 0 , 2B ETNRCC - 65

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GRAYSONPSTGREGGENF/WSTIHWMSW* A W L M INC107442 2121 N HWY 1417, SHERMANGASOLINE 5/26/93 2A , 1A E,Q* ALI KAHN112700 220 E HWY 1417, SHERMANUNKNOWN 10/9/97 1B , 1A E,QBANK ONE, TEXAS NA 102012 3621 S HWY 75, SHERMANGASOLINE 1/15/92 2 , 2A E,QBANK ONE, TEXAS NA 102015 1621 N HWY 75, SHERMANGASOLINE 1/17/92 2 , 2A E,QCAIN OIL CO 099679 HWY 75, VAN ALSTYNEGASOLINE, DIESEL, WASTE OIL 7/17/91 2 , 2A E,QCARLS SAUSAGE CO 106300 123 N BOND, WHITEWRIGHTDIESEL 3/9/93 2A , 1A E,QCEDAR CREST INVESTMENTS 101900 2317 TEXOMA PKWY, SHERMANUNKNOWN 5/27/90 1B , 1A E,QCHAPMAN INC 092720 123 W MAIN, DENISONGASOLINE 1/13/89 2 , 2A E,Q* CHAPMAN INC106448 1703 N WOODS, SHERMANGASOLINE 2/26/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 099346 501 E KING ST, SHERMANGASOLINE 6/14/91 2 , 4 E,Q* COASTAL MART INC111566 917 N TRAVIS, SHERMANGASOLINE 6/1/95 2 , 2A E,Q* COASTAL MART INC112791 1401 MORTON ST, DENISONGASOLINE 9/11/97 1B , 1A E,QCOASTAL MAVERICK 097262 1400 S ARMSTRONG, DENISONGASOLINE 11/14/90 2 , 2A E,Q* CONWAY PETROLEUM112838 315 FM 120, DENISONGASOLINE 9/18/97 1B , 1A E,Q* CONWAY PETROLEUM MARKETING INC112773 429 N SAM RAYBURN, SHERMANGASOLINE 9/23/97 1B , 1A E,QDALLAS DISTRIBUTING INC 107444 1001 S AUSTIN, DENISONGASOLINE 8/27/93 2 , 2A E,Q* DOUGLASS DISTRIBUTING111473 4408 N HWY 75, SHERMANGASOLINE, DIESEL 8/8/96 2 , 2A E,QENTERPRISE DEVELOPMENT ASSOC 103401 4612 TEXOMA PKWY, SHERMANGASOLINE, DIESEL 6/9/92 2 , 2A E,Q* GARY & BONNIE ASHTON112138 317 N HWY 377, COLLINSVILLEUNKNOWN 2/25/97 2 , 3 E,Q* GARY LTD112553 4404 TEXOMA PKWY, SHERMANUNKNOWN 8/22/97 2 , 6 E,QGRAYSON COUNTY 110689 FM 996, POTTSBOROGASOLINE 3/20/96 2 , 2A E,QGTE SOUTHWEST INC 093553 1709 N GRAND, SHERMANGASOLINE, DIESEL 8/1/89 2 , 5 E,QHERR OIL CO INC 095989 301 W MAIN, WHITESBOROGASOLINE 3/12/89 2 , 2A E,QMERCER WELL SERVICE INC 111610 W HWY 56, WHITESBOROGASOLINE, DIESEL 9/6/96 2 , 2A E,QMONTGOMERY WARD 093162 3201 TEXOMA PKWY, SHERMANGASOLINE 6/9/89 2 , 6 E,QREEDRILL INC 107093 HWY 1417, DENISONGASOLINE, DIESEL 3/4/93 2 , 2A E,QSOUTHLAND CORP 091543 2001 S CROCKETT, SHERMANGASOLINE 11/19/87 2 , 2A E,QSTAR ENTERPRISE 101342 HWY 75, VAN ALSTYNEGASOLINE 12/13/91 2A , 1A E,QTEXAS DEPT OF PUBLIC SAFETY 096317 1413 N HWY 75, SHERMANGASOLINE 7/26/90 2 , 4 E,QTEXAS OIL MARKETERS ASSOC 109813 1101 W WOODARD, DENISONGASOLINE, DIESEL, WASTE OIL 8/16/95 2A , 1A E,QTHOMASON OIL COMPANY 093339 801 W CRAWFORD, DENISONGASOLINE 5/20/89 2 , 2A E,QTU ELECTRIC 110022 308 E LAMAR, SHERMANGASOLINE 11/9/95 2 , 6 E,QTXDOT 096137 HWY 75, SHERMANGASOLINE 7/3/90 2 , 6 E,QUNKNOWN 092100 HWY 289, GUNTERGASOLINE 8/2/88 5B , 1A E,QDELTA DISTRIBUTORS (ROYLE) 31741 200 VALENTINE LANE, LONGVIEWVOC'S, METALS 7/12/94 3B , 3 ELETOURNEAU INC. (MARATHON LETOURNEAU) 30062 MOBERLY AVENUE AT ESTES PKWY, LONGVIEW BA, CD, CR, DICHLOROETHANE, 7/1/90 3B , 5 EQTETRACHLOROEMERRITT TOOL COMPANY 33042 703 GLADEWATER HWY, KILGORECHROMIUM 6/12/90 3B , 3 EQGARLAND CREOSOTING 32915 GARLAND ROAD NEAR SH 149, LONGVIEWCREOSOTE, CONSTITUENTS 8/13/85 2D , 6C QLE TOURNEAU COMPANY 30062 ESTES PARKWAY AND FM 1845, LONGVIEWVOLATILE ORGANICS 5/13/91 3A , 3,4,5 E,Q,V,1,2,3MERRITT TOOL 33042 703 GLADEWATER HWY., KILGORECHROMIUM 4/17/88 2C,4 , 2A ETEXAS EASTMAN 30137 APPROXIMATELY .2 MI. SE OF LONGVIEWSOLVENTS, PLASTICS, NICKEL 6/26/89 3A , 4,5 E,Q,V,2,3JOHN L. HARDIN: MW-1 AND 2. MSW01527 1.3 MI. W OF FM 1845 AND 1.0 MI. NW OF US 259, TOC. 3/20/91 2B , 6C E,QLONGVIEW, TX.TNRCC - 66

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GREGGPCD/CAPCD/ENFPCD/SUPPCD/VCPSTGARLAND CREOSOTING 32915 GARLAND ROAD NEAR SH 149, LONGVIEWCREOSOTE CONSTITUENTS 8/13/85 5 , 6C QLE TOURNEAU COMPANY 30062 ESTES PARKWAY AND FM 1845, LONGVIEWVOLATILE ORGANICS 5/13/91 3A , 3 E,Q,V,1,2,3MERRITT TOOL 33042 703 GLADEWATER HWY., KILGORECHROMIUM 4/7/88 4,2C , 2A ETEXAS EASTMAN KODAK 30137 APPROXIMATELY .2 MI. SE OF LONGVIEWSOLVENTS, PLASTICS, NICKEL 6/26/89 3A , 3,4,5 E,Q,V,2,3LEVI STRAUSS (RESISTOL HAT) 38266 KODAK BLVD., LONGVIEWTETRACHLOROETHYLENE 10/29/84 3B , 3 EQV23SKEETER PRODUCTS 30629 1 SKEETER ROAD, KILGOREACETONE 9/15/93 O2 , 1 E2GARLAND CREOSOTING 32915 GARLAND ROAD NEAR SH 149, LONGVIEWCREOSOTE CONSTITUENTS 8/13/85 1B , 1A QTXD007330053CONTINENTAL CAN COMPANY PLANT NO. 472 224 901 FISHER ROAD, LONGVIEWPETROLEUM SUBSTANCES, LEAD 4/4/96 0 , 6A E* NORTHWEST VILLAGE - LONGVIEW272 1700 BLK NW LOOP 281 @ GILMER ROAD,CHLORINATED SOLVENTS 6/6/96 0 , 4 ELONGVIEWPINETREE CENTRE 286 1809 NW LOOP 281, LONGVIEWCHLORINATED SOLVENTS 7/5/96 0 , 3 ESTEELMAN INDUSTRIES, INC. 229 2706 HIGHWAY 135 NORTH, KILGORESOLVENTS 4/12/96 0 , 5 EACID ENGINEERING INC 104110 1316 N LONGVIEW ST, KILGOREGASOLINE, DIESEL 7/29/92 2 , 2A E,QALLEN TALLEY OIL CO 104699 522 W MARSHALL, LONGVIEWGASOLINE 9/1/92 2 , 2A E,QANCOR SERVICES INC 100761 2550 N LONGVIEW ST, KILGOREGASOLINE, DIESEL 10/22/91 2 , 2A E,QANTIMONY CORP ATTN S ROACH 099265 S HWY 31, LONGVIEWGASOLINE, DIESEL 5/23/91 2A , 6 E,QB J SERVICES 095994 2500 N HWY 135, KILGOREWASTE OIL 6/21/90 2 , 4 E,QB J SERVICES 099924 2600 N HWY 135, KILGOREGASOLINE, DIESEL 8/19/91 2 , 4 E,QBEAVERS BUICK CO 096986 318 W MARSHALL AVE, LONGVIEWGASOLINE 10/12/90 2 , 2A E,QBIG THREE INDUSTRIES INC 095759 FM 1845, LONGVIEWGASOLINE 6/6/90 2 , 2A E,QBOWAN TRAVIS 103844 1200 FM 1845, LONGVIEWGASOLINE 6/18/92 2 , 2A E,QCAL-MAINE FOODS INC 095632 JOY WRIGHT MT RD, KILGOREGASOLINE 3/26/90 1B , 1A E,QCAMPBELL MIKE 104656 2001 S EASTMAN RD, LONGVIEWGASOLINE 9/10/92 2 , 6 E,QCARMEN ALLEN 102624 N HWY 271, GLADEWATERGASOLINE 3/25/92 5B , 6 E,Q* CITIZENS BANK & TRUST105355 1227 W MARSHALL AVE, LONGVIEWGASOLINE 11/9/92 2 , 2A E,QCITY OF KILGORE 094966 N KILGORE ST, KILGOREGASOLINE 2/15/90 2 , 2A E,QCITY OF LONGVIEW 095634 133 TIMPSON ST, LONGVIEWGASOLINE, DIESEL 2/12/90 2A , 2A E,QCROSBY LEBUS 107653 900 FISHER RD, LONGVIEWGASOLINE 11/1/93 2 , 2A E,QCUDD PRESSURE CONTROL INC 098913 404 AMBASSADOR ROW, LONGVIEWGASOLINE, DIESEL 4/30/91 2 , 2A E,QD C DISTRIBUTORS 109336 2411 S HWY 259, KILGOREDIESEL 3/17/95 2 , 2A E,QDARR EQUIPMENT COMPANY 104537 FM 1845, LONGVIEWCHEMICAL 6/8/92 2 , 2A E,QDR. GARY WHITE 101920 122 GILMER, LONGVIEWGASOLINE 2/11/92 2 , 6 E,QE & S MANUFACTURING 103237 506 W HARRISON RD, LONGVIEWWASTE OIL 5/7/92 2 , 6 E,QE K BENNETT INC 091368 1414 MCCANN, LONGVIEWGASOLINE 6/1/87 2 , 2A E,QE Z MART STORES INC 103926 1701 S HENDERSON BLVD, KILGOREGASOLINE 7/15/92 2 , 5 E,QE Z MART STORES INC 103988 1001 NW LOOP 281, LONGVIEWGASOLINE 7/10/92 2 , 2A E,QE. TX SALTWATER DISPOSAL CO. 099916 1209 INDUSTRIAL BLVD, KILGOREGASOLINE 8/20/91 2 , 2A E,QEK BENNETT INC 092877 100 W COTTON, LONGVIEWGASOLINE 4/21/89 2 , 2A E,QELDER FRANK 101401 1200 W HWY 259, KILGOREGASOLINE 1/2/92 2A , 1A E,QEXXON COMPANY USA 093380 1901 GILMER RD, LONGVIEWGASOLINE 5/23/89 2 , 6 E,QEXXON COMPANY USA 093381 128 W MARSHALL, LONGVIEWGASOLINE, WASTE OIL 5/23/89 2 , 4 E,QFDIC RESOLUTION TRUST CORP. 097863 100 UPSHUR, GLADEWATERGASOLINE 1/25/91 2 , 2A E,QTNRCC - 67

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GREGGPSTFFP OPERATING PARTNERS 092843 4306 W MARSHALL, LONGVIEWGASOLINE 3/28/89 2 , 2A E,QGLADEWATER ISD 095784 700 MELBA A, GLADEWATERGASOLINE 6/4/90 2 , 4 E,QGLADEWATER NATIONAL BANK 094808 101 W UPSHUR, GLADEWATERGASOLINE 2/13/90 2 , 3 E,QGOOD SHEPHERD MEDICAL CENTER 100541 MARSHALL ST, LONGVIEWGASOLINE, DIESEL 10/14/91 2 , 2A E,QGREGG COUNTY COMMISSIONERS OFF 104036 1109 FM 449, LONGVIEWWASTE OIL 7/10/92 2 , 6 E,QGREGG COUNTY OIL CO 096586 HWY 149, LAKEPORTGASOLINE, DIESEL 8/17/90 2 , 2A E,QGREGG COUNTY OIL CO 107160 300 N MAIN, GLADEWATERGASOLINE 11/6/92 2 , 2A E,Q* GREGG COUNTY OIL CO112223 210 W TYLER, LONGVIEWGASOLINE, DIESEL 3/31/97 2 , 2A E,QGREGG COUNTY PCT 2 102818 3313 PINE TREE RD, LONGVIEWDIESEL 4/17/92 2 , 2A E,QGTE TELEPHONE OPERATIONS 099682 4200 STONE RD, KILGOREGASOLINE 4/3/90 2 , 5 E,Q* HARVEY BLACKSON107038 807 E MARSHALL, LONGVIEWGASOLINE 3/26/93 5B , 2A E,QHAYES MILLER ROOFING, INC. 094825 505 E COTTON ST, LONGVIEWGASOLINE 2/9/90 1B , 1A E,QHAYES PAUL 100434 813 METHVIN, LONGVIEWGASOLINE 9/27/91 2 , 6 E,QHEAD INDUSTRIAL SERVICES INC 099005 4005 GARDENER MITCHELL PKWY, LAKEPORT DIESEL 5/16/91 2 , 5 E,QHUBERT GAMMON 097050 HWY 149, LONGVIEWDIESEL 10/3/90 2 , 2A E,QINDUSTRIAL POWER & SUPPLY 102817 1006 W COTTON ST, LONGVIEWDIESEL, WASTE OIL 4/14/92 2 , 6 E,QJACK MCNUTT 096835 5014 JUDSON RD, LONGVIEWGASOLINE 9/19/90 2 , 2A E,QJOHN BLAIR 102959 1101 N 4TH ST, LONGVIEWGASOLINE 3/26/92 2A , 1A E,QJOHNSTON SUPPLY COMPANY 094617 502 N HWY 135, KILGOREGASOLINE 12/18/89 2 , 2A E,QKILGORE ISD 099184 MONTGOMERY ST, KILGOREGASOLINE 6/4/91 2 , 6 E,QKIRBY OIL CO 099392 435 S HIGH ST, LONGVIEWGASOLINE 6/27/91 2 , 2A E,QL&H INVESTMENTS 094799 1406 E MARSHALL, LONGVIEWGASOLINE 2/5/90 2 , 2A E,Q* LLOYD REED111236 3401 HENDERSON HWY, KILGOREUNKNOWN 6/28/96 1B , 1A E,QLLT INVESTMENTS 105726 1930 E MARSHALL, LONGVIEWGASOLINE 12/18/92 2A , 1A E,QLONG GREEN ENTERPRISE 103813 201 W MARSHALL, LONGVIEWGASOLINE 7/3/92 2 , 2A E,QLONGVIEW BANK & TRUST 094226 2000 N EASTMAN RD, LONGVIEWGASOLINE 11/20/89 2 , 2A E,QLONGVIEW BANK & TRUST 097594 1200 S MOBBERLY AVE, LONGVIEWGASOLINE 12/17/90 2 , 4 E,QMADE-RITE BOTTLING COMPANY 102926 320 INDUSTRIAL BLVD, LONGVIEWGASOLINE, WASTE OIL 10/17/92 2 , 2A E,QMARTIN GAS INC 101872 2601 N HWY 259, KILGOREGASOLINE 2/13/92 2 , 2A E,QMARTIN GAS SALES INC 110923 101 E SABINE, KILGOREGASOLINE 3/25/96 2 , 2A E,QMARVIN A SMITH CO INC 100585 HWY 42, KILGOREGASOLINE, DIESEL 9/30/91 2 , 2A E,QMAXEY OIL CO 092949 215 STANDARD, LONGVIEWDIESEL 10/21/89 2A , 1A E,QMCS FUELS INC 091899 201 E HWY 80, WHITE OAKUNKNOWN 5/9/88 2A , 2A E,QMCS FUELS INC 093888 801 GILMER RD, LONGVIEWGASOLINE 10/11/89 2 , 2A E,QMOBBERLY PROPERTIES 110307 2301 S MOBBERLY, LONGVIEWGASOLINE 1/23/96 2A , 1A E,QMS. WINTER ELDER 101399 300 E NORTH, KILGOREGASOLINE 1/2/91 2 , 2A E,QNICK MURLEY 103087 701 GLADEWATER ST, KILGOREGASOLINE, WASTE OIL 5/13/92 2 , 2A E,Q* PAUL FRENCH106417 4802 JUDSON RD, LONGVIEWGASOLINE, WASTE OIL 3/10/93 2 , 2A E,QPOOL CO 096435 304 WOODLAWN, KILGOREGASOLINE, DIESEL 8/7/90 2 , 2A E,QPRESLEY OIL CO 103626 1515 MOBBERLY ST, LONGVIEWGASOLINE 6/26/92 2 , 3 E,QREEVES OIL CO 109811 HWY 80, WHITE OAKGASOLINE, HYDR FLUID 8/28/95 2A , 1A E,QREEVES OIL CO INC 091968 700 W MAIN, KILGOREGASOLINE 3/17/88 2A , 2A E,QREEVES OIL CO INC 095742 216 N MAIN, GLADEWATERGASOLINE 6/1/90 2 , 2A E,QREEVES OIL CO INC 095868 6TH, LONGVIEWGASOLINE, DIESEL 6/13/90 2 , 2A E,Q* REEVES OIL CO INC096387 3001 JUDSON RD, LONGVIEWGASOLINE 8/6/90 2 , 2A E,Q* REEVES OIL CO INC111673 601 S MOBBERLY ST, LONGVIEWGASOLINE 9/23/96 2 , 2A E,QREEVES OIL CO INC 111733 611 E MARSHALL AVE, LONGVIEWGASOLINE, DIESEL 9/29/96 2 , 2A E,QREEVES OIL CO INC 111850 3357 GILMER RD, LONGVIEWGASOLINE, DIESEL 10/6/96 2 , 2A E,QTNRCC - 68

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GREGGPSTWQDGRIMESIHWPSTGUADALUPEIHWPCD/CAPST* REEVES OIL CO INC112181 4012 W MARSHALL ST, LONGVIEWUNKNOWN 3/17/97 2 , 2A E,Q* REEVES OIL INC112125 101 W NELSON ST, LONGVIEWGASOLINE 2/11/97 2 , 2A E,Q* ROBERTS & CHELETTE INC112126 FM 3053, KILGOREGASOLINE 2/11/97 2 , 2A E,Q* RUFF REALTORS INC.109767 202 N HENDERSON, KILGOREWASTE OIL, GASOLINE 7/7/95 2 , 2A E,QSCHEPPS DAIRY 104836 440 S CENTER, LONGVIEWGASOLINE 9/14/92 2A , 6 E,QSELDON FORD 100676 2021 S HIGH ST, LONGVIEWGASOLINE 10/24/91 5B , 2A E,QSOUTHLAND CORP 103916 1311 W MARSHALL, LONGVIEWGASOLINE 7/17/92 2 , 2A E,QSOUTHLAND CORP 103936 1305 S GREEN ST, LONGVIEWGASOLINE 7/23/92 2 , 6 E,QSTAR ENTERPRISE 094109 IH-20, KILGOREGASOLINE, WASTE OIL 6/29/89 2 , 4 E,QSTAR ENTERPRISE 106876 3122 ESTES PKWY, LONGVIEWGASOLINE 6/7/93 2 , 2A E,QSTROHS BREWERY CO 105979 1400 W COTTON ST, LONGVIEWDIST F OIL 12/22/92 2 , 2A E,QSUSIE GIBSON 095597 3101 LAIRD HILL RD, KILGOREGASOLINE 5/18/90 2 , 2A E,QTED RUSHTON 109507 2826 S HENDERSON BLVD, KILGOREGASOLINE 5/17/95 2 , 2A E,QTEXAS DEPT OF PUBLIC SAFETY 096543 416 LAKE LAMOND RD, LONGVIEWGASOLINE 8/13/90 2 , 2A E,QTOTAL PETROLEUM INC 111476 104 S SPUR 63, LONGVIEWGASOLINE, DIESEL 8/1/96 2 , 2A E,QTRIUNE OIL COMPANY 102956 145 LAKE LAMOND RD, LONGVIEWUNKNOWN 4/8/92 5B , 6 E,QTXDOT 097428 US HWY 259, LONGVIEWGASOLINE, DIESEL 11/29/90 2 , 6 E,QUNKNOWN 105769 703 E MARSHALL AVE, LONGVIEWUNKNOWN 12/22/92 5B , 2A E,Q* WALMART STORES INC109124 1811 HWY 259, KILGOREWASTE OIL 1/31/95 2 , 2A E,Q* ZIPPY JS INC112168 1515 HIGGINBOTHAM, KILGOREGASOLINE 3/7/97 2 , 2A E,Q* ZIPPY JS INC112172 3910 N HWY 135, KILGOREGASOLINE 3/7/97 2 , 2A E,QUNION TANK CAR COMPANY WQ02066 PLANT SITE ON FM 2087, @ 1/2 MILE SOUTHWEST OF NITRATE 9/1/87 3C , 5 E,QTHE INTERSECTION WITH FM 1845 AND @ 1/2 MILESOUTHWEST OF LONGVIEW, GREGG COUNTY, TX.* INTERNATIONAL PAPER31894 EAST SIDE OF BUSINESS HIGHWAY 6CREOSOTE 3/5/91 3A , 4,5 E,Q,V,2,3* BOBBY MCGEES EXXON093796 717 W WASHINGTON, NAVASOTADIESEL 10/10/89 2 , 2A E,QCHAMPANGE PROPERTIES, L.C. 098311 201 MAIN ST, SHIROGASOLINE, DIESEL 9/30/90 2 , 2A E,QCIRCLE K STORES, INC. 091349 1411 S LASALLE, NAVASOTAUNKNOWN 7/15/87 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 111921 416 E WASHINGTON, NAVASOTAGASOLINE 10/30/96 2 , 2A E,QINTERSTATE SOUTHWEST FORGE 100215 INTERSTATE DR, NAVASOTADIESEL 9/13/91 2 , 6 E,Q* SECURITY STATE BANK110759 618 N LASALLE, NAVASOTAGASOLINE 2/23/96 2 , 2A E,QWALTRIP ENTERPRISES INC 097944 414 FARQUHAR ST, NAVASOTAGASOLINE 2/6/91 2 , 2A E,QSTRUCTURAL METALS 31533 BILLY DWYER ROAD, SEGUINCR 9/30/90 3A,3B , 5 E,Q,V,2,3STRUCTURAL METALS 31533 BILLY DWYER ROAD, SEGUINCR 9/30/90 3A,3B , 1B,3 E,Q,V,2* CAROLYN & ALADIK KOCIAN111907 501 N AUSTIN, SEGUINGASOLINE, WASTE OIL 11/13/96 2 , 2A E,QCORNER FOOD MART 092628 506 AUSTIN ST, SEGUINGASOLINE 4/27/88 2 , 5 E,QDARIUS CORP 091665 2001 PROFORM RD, SEGUINCHEMICAL 1/27/88 2 , 5 E,QFARMCO FUEL & FOOD STORE INC 110291 8908 W COURT ST, SEGUINUNKNOWN 6/17/96 2 , 2A E,QTNRCC - 69

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236GUADALUPEPSTHALEPSTWQDFARMCO INC 103939 1024 N AUSTIN, SEGUINGASOLINE 7/21/92 2A , 6 E,QFDIC REC NBC SEQUIN 104259 216 BLUMBERG, SEGUINGASOLINE 7/31/92 2 , 2A E,QFIMSA INC 095773 1105 N KING, SEGUINGASOLINE 3/19/90 2 , 4 E,QLAKE BREEZE SKI LODGE INC 110241 FM 725, MCQUEENEYGASOLINE 2/16/95 2 , 6 E,QSTANDARD GYPSUM CORP 106905 FM 78 RD, MCQUEENEYGASOLINE, DIESEL 5/28/93 2 , 2A E,QSTEWART WILBER 096723 1056 E COURT ST, SEGUINGASOLINE, WASTE OIL 8/14/90 2 , 2A E,QSTRUCTURAL METALS INC 099427 BILL DWYER RD, SEGUINGASOLINE 5/17/91 2A , 6 E,QALLSUPS PETROLEUM, INC. 108031 315 MAIN, HALE CENTERGASOLINE 4/5/94 2 , 2A E,QBROWNING SEED CO 095198 S IH-27, PLAINVIEWDIESEL 3/22/90 2 , 6 E,QDOUGLASS OIL CO 097906 500 COLUMBIA, PLAINVIEWGASOLINE 1/28/91 2 , 2A E,QDOUGLASS OIL CO 111526 13TH, PLAINVIEWGASOLINE 8/9/96 2 , 6 E,QDOUGLASS OIL COMPANY 098956 2ND ST, PLAINVIEWGASOLINE 5/14/91 2 , 6 E,QFEEDERS SUPPLY INC 110019 N HWY 70, PLAINVIEWDIESEL 8/29/95 2 , 6 E,QFRED GARRISON OIL CO 093226 615 COLUMBIA, PLAINVIEWGASOLINE 6/16/89 2 , 6 E,QFRED GARRISON OIL CO 094834 1600 QUINCY, PLAINVIEWGASOLINE 1/31/90 2 , 6 E,Q* FRED GARRISON OIL CO097260 310 E 5TH ST, PLAINVIEWGASOLINE 10/22/90 2 , 2A E,QFRED GARRISON OIL CO 098625 1700 W 5TH, PLAINVIEWGASOLINE, WASTE OIL 3/29/91 2 , 5 E,Q* GORDON ROGERS TEXACO096604 509 E 24TH, PLAINVIEWGASOLINE, WASTE OIL 8/16/90 2 , 2A E,QHORAN SPRAYING SERVICE 093761 E HWY 70, PLAINVIEWJET FUEL 8/22/89 5B , 1A E,QNATIONAL STATIONS 098670 501 E 5TH ST, PLAINVIEWGASOLINE 4/17/91 2 , 2A E,QNEAL BURNETT OIL CO 095194 401 E 5TH ST, PLAINVIEWGASOLINE 3/22/90 5B , 1A E,QPETE PEACOCK 096854 1211 AVE D, ABERNATHYGASOLINE 10/1/90 5B , 1A E,QPHIL PINNELL 108966 2209 W 24TH ST, PLAINVIEWGASOLINE 12/21/94 2 , 5 E,QPLAINVIEW ISD 094531 1002 ASH ST, PLAINVIEWDIESEL 1/5/90 2A , 1A E,Q* POSEY JIM L105595 201 W 7TH, PLAINVIEWGASOLINE 12/11/92 2 , 2A E,QSAM MATTHEWS OIL CO INC 094827 1401 MAIN, PETERSBURGGASOLINE 1/31/90 2A , 1A E,QSOUTHWEST COCA COLA 096528 105 S HWY 87, PLAINVIEWGASOLINE 8/3/90 2 , 3 E,QSOUTHWEST COCA-COLA BOTTLING 096296 300 W 5TH ST, PLAINVIEWDIESEL 7/27/90 2 , 2A E,QTC PARTNERSHIP 093694 4002 OLTON RD, PLAINVIEWGASOLINE 9/22/89 2 , 6 E,QUNITED FARM INDUSTRIES 106035 405 E 24TH, PLAINVIEWDIESEL, GASOLINE 2/2/93 2 , 6 E,Q* UNITED FARM INDUSTRIES107657 E HWY 194, EDMONSONGASOLINE 12/22/93 2 , 2A E,QWAGON YARD INC 108776 1111 W 24TH ST, PLAINVIEWGASOLINE 10/28/94 2 , 6 E,QWEST TEXAS GAS INC 101672 813 N DATE, PLAINVIEWGASOLINE 1/14/92 2 , 2A E,QWEST TEXAS GAS INC 104069 HWY 70, HALFWAYDIESEL 7/10/92 2 , 2A E,Q YWEST TEXAS GAS INC 107626 810 N DATE, PLAINVIEWGASOLINE 1/27/94 2 , 2A E,QWESTERN AG SALES CO INC 100635 327 W 24TH ST, PLAINVIEWDIESEL 10/14/91 2 , 6 E,QWILLIAMS ESTATE 109349 321 W 6TH ST, PLAINVIEWGASOLINE 3/31/95 5B , 1A E,QEXCEL CORPORATION WQ01463 IMMEDIATELY NORTHEAST OF THE INTERSECTION CHLORIDE, NITRATE 1/1/87 3A , 4,5 E,QOF U.S. HWY.87 AND F.M. 3183, @ 1.5 MILES NORTHOF PLAINVIEW, TX.HIGH PLAINS UWCD NO. 1 SAMPLING PROGRAM 2303201 WELL NO. 23-03-201 (SAMPLE 189-1-2)2,4-D 4/4/89 1D,1B , 1B E,Q,V,2HIGH PLAINS UWCD NO. 1 SAMPLING PROGRAM 2303802 WELL NO. 23-03-802 (SAMPLE 189-1-1)2,4-D 3/30/89 1D,1B , 1B E,Q,V,2ZIPP INDUSTRIES WQ01757 NORTH OF STATE HWY. 194 @ 1.3 MILES WEST OFTHE INTERSECTION WITH IH 27 IN HALE COUNTY.SULFATE, AMMONIA, NITRATE 1/1/81 0 , 4,5 E,QTNRCC - 70

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HALEWUDPLAINVIEW, CITY OF 0950004 WELL 9 (G0950004E) - 2300 KOKOMO ATBTEX 10/30/95 2C , 5 E,Q,V,2INTERSECTION WITH 23RD ST.HALLPSTHAMILTONPSTHARDEMANPSTHARDINENF/WSTMSWALLSUPS PETROLEUM 111588 MAIN, TURKEYUNKNOWN 9/10/96 2 , 2A E,QGTE SOUTHWEST INC 095833 N HWY 287, MEMPHISGASOLINE 4/3/90 2 , 5 E,Q* TXDOT094197 FM 256, MEMPHISWASTE OIL 9/25/89 1B , 1A E,Q* TXDOT106930 E FM 256, MEMPHISGASOLINE 5/2/93 2 , 2A E,QCOZBY CONVENIENCE STORE 091488 1101 E MAIN, HAMILTONGASOLINE 9/24/87 2A , 6 E,QABELL OIL CO INC 092064 102 E 11TH ST, QUANAHGASOLINE 7/22/88 5B , 1A E,QAYRES OIL INC 092099 ELBERT, QUANAHDIESEL 8/16/88 5B , 1A E,QAYRES OIL INC 095020 HWY 287, QUANAHGASOLINE 2/23/90 2A , 1A E,QJ R M PROPERTIES INC 101328 101 W 11TH ST, QUANAHGASOLINE 12/4/91 2 , 2A E,QJONES OIL CO 091958 201 W 11TH ST, QUANAHWASTE OIL 6/16/88 5B , 1A E,QKEN HOLMES 092066 100 W 11TH ST, QUANAHGASOLINE 7/25/88 5B , 2A E,QL & M FOOD INC 093681 700 S 2ND ST, CHILLICOTHEGASOLINE 9/12/89 2 , 2A E,QROSS ENERGY INC 092867 401 MAIN, QUANAHGASOLINE 4/18/89 5B , 3 E,QSOUTHERN COTTON OIL CO 094463 600 E NELSEN, QUANAHGASOLINE 12/2/89 2 , 2A E,QSTERMER OIL COMPANY 092028 HWY 287, QUANAHGASOLINE 7/7/88 5B , 1A E,QUNKNOWN 091268 UNKNOWN, QUANAHUNKNOWN 4/2/86 5B , 1A E,QSOUTH HAMPTON REFINING 30672 FM 418 WEST, SILSBEEHYDROCARBONS 4/8/93 3B , 3 V2HARDIN COUNTY: P-103MSW01114 &15103.25 MI. SW OF KOUNTZE ON FM 770, HARDIN CO.,TX.CHLOROBENZENE 6/25/91 2A , 2B E,Q,V,1,2HARRISPSTENF/WST* CAMPBELL OIL CO.112509 HWY 96 BYPAS, SILSBEEUNKNOWN 8/1/97 1B , 1A E,QCIRCLE K STORES 110877 970 HWY 96, SILSBEEGASOLINE 4/11/96 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091156 857 N 5TH ST, SILSBEEGASOLINE 3/7/86 2 , 2A E,Q* FULLER OIL CO101050 210 S HWY 96, SILSBEEGASOLINE 10/1/91 2 , 2A E,QFULLER OIL CO INC 099722 FM 418, SILSBEEGASOLINE 5/28/91 2 , 2A E,QHARDIN COUNTY SHERIFF DEPT 106555 COUNTY COURTHOUSE, KOUNTZEGASOLINE 3/11/93 2A , 1A E,QKOUNTZE ISD 110726 HWY 69, KOUNTZEGASOLINE 3/13/96 2A , 1A E,QMILLER W D 095280 FM 770, SARATOGAGASOLINE 3/22/90 2 , 2A E,QALPHA-CHEM (MAINTECH/PARKEM/BFI) 31618 11011 FAIRMONT PARKWAY, LAPORTECHLORINATED SOLVENTS,CHLOROFORM5/25/93 3B , 3 EQATLAS BRADFORD 31223 WALLISVILLE ROAD, HOUSTONVOLATILE ORGANIC COMPOUNDS 11/9/87 4 , 4 EBAKER HUGHES - HOUSTON (SEE REED TOOLS) 30999 6247 NAVIGATION BLVD., HOUSTONTRICHLOROETHYLENE,TRANS-1,2- 4/1/89 0 , 3 EQDICHLOROETHYTNRCC - 71

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISENF/WSTIHWMSWCITGO PETROLEUM CORP (FOREMOST) - HOU 31964 12325 N. HIGHWAY 75, HOUSTONBTEX, TPH (GASOLINE/DIESEL) 4/29/93 3B , 4 ECOVESUD, S.A. 52123 400 N. RICHEY STREET, PASADENAAS, CU, PESTICIDES,11/15/91 1 , 1 EQHYDROCARBONSDIXIE CHEMICAL CO. 30314 10701 BAY AREA BOULEVARD, PASADENVOC'S 4/15/86 4B , 3 EDOWELL SCHLUMBERGER - DEER PARK 31453 620 HOWARD AVE., DEER PARKTPH,VOC'S,CHLORIDE 6/21/89 3B , 2A EQV2ETHYL CORP. 30465 1000 N. SOUTH ST., PASADENALEAD, ETHYLENE DICHLORIDE 3/29/88 3A , 3 E* EVANS COOPERAGE (AIR PRODUCTS)32072 10521 SHELDON ROAD, HOUSTONETHYLBENZENE, XYLENES 9/28/95 3B , 2B EQEXXON CHEMICAL AMERICAS - BAYTOWN 33880 5000 BAYWAY DR., BAYTOWNHYDROCARBONS, PCB'S 9/17/90 3B , 3 EQ23EXXON CO USA - BAYTOWN 30040 2800 DECKER DR., BAYTOWNHYDROCARBONS, ORGANICS 9/27/90 3A , 4 EQV3HATHEWAY PATTERSON 30239 6800 IRVINGTON BLVD, HOUSTONPCP, CREOSOTE 8/24/89 3B , 2A EKOPPERS CO., INC. (BEAZER) 30419 HARDY ST., HOUSTONPAH'S, PHENOLS, METALS 4/1/85 3B , 3 EQV12LAIDLAW ENVIRONMENTAL (ROLLINS ENVIRON) 50089 2027 BATTLEGROUND ROAD, DEER PARKCHLOROBENZENE, TCE, 1,2-DCE 1/1/83 3A , 4 EQLEAD PRODUCTS 31418 709 N. VELASCO, HOUSTONLEAD, CADMIUM 2/28/85 2C , 3 EQLYONDELL-CITGO REFINING COMPANY, LTD. 30092 N SIDE OF HWY 225 E OF LIGHT CO RD, HOUSTON BTEX, IRON 2/19/88 3B , 3 EQPHIBRO ENERGY USA (HILL) - HOUSTON 30520 9701 MANCHESTER AVE., HOUSTONHYDROCARBONS 7/18/90 3B , 4 ESARTOMER (INTERESIN CORP.) 37739 17335 WALLISVILLE ROAD, HOUSTONSTYRENE, TOLUENE, XYLENE 8/30/93 3B , 2A EQU* SHELL OIL COMPANY - DEER PARK30007 STATE HWY 225, DEER PARKCHLORINATED HYDROCARBONS 1/18/89 3 , 4 E,V1SOUTHWESTERN BARGE FLEET 31208 18310 MARKET STREET, CHANNELVIEWHYDROCARBONS 1/12/90 2C , 3 EQAIR PRODUCTS MFG. CORP. 30317 1423 HWY 225, PASADENANITRATED ORGANICS 1/29/85 3A , 2,4,5 E,QARCO CHEMICAL COMPANY 30676 2502 SHELDON ROAD, CHANNELVIEWORGANICS 1/24/94 3A , 4,5 E,QCROWN CENTRAL PETROLEUM 30311 111 RED BLUFF ROAD, PASADENAHYDROCARBONS 12/1/88 3A , 4,5 E,Q,V,1,2DOW CHEMICAL 30464 BATTLEGROUND RD., LA PORTFREE PHASE SOLVENTS 10/21/88 3A , 4,5 E,Q,V,2,3DUPONT - LA PORT 30046 11701 STRANG RD, LA PORTORGANICS 5/15/89 0 , 2A E,QETHYL 30465 1000 N. SOUTH ST., PASEDENALEAD, ETHYLENEDICHLORIDE 2/23/87 3A , 4,5 E,Q,V,2,3EXXON CO USA - BAYTOWN 30040 DECKER DR., BAYTOWNHYDROCARBONS, ORGANICS 9/27/90 3A,2C , 3,4,5 E,Q,V,3GATX TERMINAL - GALENA PARK 30573 906 CLINTON DRIVE, GALENA PARKVOLATILES 2/18/86 3A , 3,4,5 E,Q,V,2,3HOECHSTE CELANESE -CL 30022 9502 BAYPORT ROAD, PASADENAMETALS, SULFIDES, 1,2,EDC 8/1/90 3A , 5 E,Q,V,2,3ISK BIOTECH (FERMENTA) 30552 2239 HADEN RD, HOUSTONSOLVENTS/HEAVY METALS 12/14/88 3A,3C , 4,5 E,Q,V,2,3LAIDLAW (FORMERLY ROLLINS ENVIRONMENTAL 37328 2027 BATTLEGROUND ROAD, DEER PARKCHLOROBENZENE, TCE, 1,2 DCE 7/22/86 3A , 4,5 E,QSERVICELUBRIZOL CP50077 30324 41 TIDAL RD., DEERPARKHYDROCARBONS 2/5/85 3A , 4,5 E,Q,V,1,3NASA, LBJ SPACE CENTER 71022 2001 NASA ROAD 1FREON 113 10/30/87 3A,2B , 2A,4 E,Q,V,2QUANTUM CHEMICAL 30049 1515 MILLER CUTOFF RD, DEER PARKLNAPL, METALS, BETX, TCE, PCB,VINYL CHLORIDE6/1/92 3A,3C , 2A E,QRHONE POULENC - HOUSTON 31019 8615 MANCHESTER RD., HOUSTON 77012FE, NAPTHALENE, CO, NI, ZN 6/27/91 3A , 2A E,Q,VROHM & HAAS 30041 INTERSECTION OF HWY. 134 & 225, DEERPARK SULFATE 2/10/87 3A , 4,5 E,Q,V,2,3SAFETY-KLEEN - MISSOURI CITY 71144 1570 INDUSTRIAL DRIVE, MISSOURI CITYORGANICS 1/20/92 3A , 4,5 E,QSAFETY-KLEEN - PASADENA 71143 3333 FEDERAL ROAD, PASADENABENZENE, TOLUENE, XYLENE,TCE8/1/94 3A , 3,4,5 E,Q,V,2SHELL DEVELOPMENT CO-HOUSTON 31304 3333 HWY 6, HOUSTONGASOLINE 1/5/92 0 , 2A E,QSHELL OIL COMPANY - DEER PARK 30007 STATE HWY 225, DEER PARKCHLORINATED HYDROCARBONS 1/18/89 3A , 4,5 E,V,1UNION PACIFIC (FORMERLY SO. PAC.TRANS.CO.-HOU31547 4910 LIBERTY ROAD, HOUSTONBENZENE, TOLUENE,NAPHTHADENE, PHENOL, 2,4,DIMETHYL PHENOL1/1/84 3A,2B , 3,4,5 E,Q,V,2,3BFI/MCCARTY RD.: MW-5UB, 6UB, 6LB, 11UB,12UB, AND 12LBMSW00261A ON US 90E, 0.9 MI. E OF FM 527, HOUSTON, TX. VOCs (TCE, 1,1-DICHLOROETHENE, AND CARBONTETRACHLORIDE)11/19/91 2B , 3 E,Q,V,2CITY OF TOMBALL: MW-4 MSW01140A 1.6 MI. NE OF FM2920 AND FM149 INT., 0.4 MI. NE OF VOCs (CIS-1,2-DICHLOROETHENE) 7/23/96 1B , 2A E,Q,V,2TNRCC - 72

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISMSWRUDOLPH AND HUFF SMITH RDSPCD/CAAIR PRODUCTS MFG. CORP. 30317 1423 HWY 225, PASADENANITRATED ORGANICS 1/29/85 3A , 2,5 E,QARATEX SERVICES - HOUSTON T0010 8302 MARKET ST, HOUSTONPCE, TCE, DCE 11/1/90 0 , 3 E* ARCO CHEMICAL COMPANY/BAYPORT30368 PASADENATERTIARY BUTYL ALCOHOL 6/16/97 023A , 2,3 E,Q,V,2CAMERON IRON WORKS 31267 KATY & SILBER ROAD, HOUSTONCHLORINATED SOLVENTS,METALSON IH-10 NEAR CEDAR BAYOU11/4/91 3 , 2 ECHEVRON - CEDAR BAYOU 30091 BENZENE 6/3/93 4 , 2 ECROWN CENTRAL PETROLEUM 30311 111 RED BLUFF ROAD, PASADENAHYDROCARBONS 12/1/88 3A , 4,5 E,Q,V,1,2DRESSER INDUSTRIES 32145 12950 WEST LITTLE YORK, HOUSTONTCE, VOC 12/2/96 0 , 4 EDUPONT - LA PORT 30046 11701 STRANG RD., LA PORTORGANICS 5/15/89 0,3A , 2,3 E,QEL TEX CHEMICALS 30271 4050 HOMESTEAD, HOUSTONPB 12/16/94 0 , 3 EETHYL 30465 1000 N. SOUTH ST., PASEDENALEAD, ETHYLENEDICHLORIDE 2/23/87 3A , 5 E,Q,V,2,3EXXON CO USA - BAYTOWN 30040 DECKER DR., BAYTOWNHYDROCARBONS, ORGANICS 9/27/90 2C,3A , 3,4 E,Q,V,3EXXON CO USA - NORTH HOUSTON 38873 8700 N. FREEWAY, HOUSTONTPH, BETX 6/1/90 0 , 4 EFLUOROCARBON - OLD KATY RD 31402 10420 OLD KATY RD, HOUSTONSOLVENTS 6/9/86 2D , 4 EQV23GATX TERMINAL - GALENA PARK 30573 906 CLINTON DRIVE, GALENA PARKVOLATILES 2/18/86 3A , 2,3,4 E,Q,V,2,3HOECHSTE CELANESE - CL 30022 9502 BAYPORT ROAD, PASADENAMETALS, SULFIDE, 1,2,EDC 8/1/90 3A , 4,5 E,Q,V,1,2HUGHES TOOL DIVISION (HOUSTON) 30323 5425 POLK STREET, HOUSTONTPH, SOLVENT CONSTITUENTS,PENTACHLOROPHENOL, PAHS,CYANIDE6/1/89 2 , 3 E,Q,VINTERCONTINENTAL TERMINALS CO. 30966 1943 BATTLEGROUND, DEER PARKMTBE 11/19/85 2B , 6C EISK BIOTECH (FERMENTA) 30552 2239 HADEN RD, HOUSTONPESTICIDES, VOCS, CHLORINATED 12/14/88 3A , 2A,3 E,QSOLVENTSKEYSTONE (ANDERSON GREENWOOD) 30269 5425 SOUTH RICE, HOUSTONTCE DCE 11/1/93 0 , 4 E,Q,VKOPPERS COMPANY 31386 INDUSTRIAL PORT AT GREENSPORT GATE #5, CREOSOTE, METALS 5/4/88 2A , 4 E,Q,V,2,3HOUSTONLUBRIZOL CP50077 30324 41 TIDAL RD., DEERPARKHYDROCARBONS, BARIUM 2/5/85 3A , 2345 E,Q,V,1,3LYONDELL PETROCHEMICAL - HOUSTON 30092 N SIDE OF HWY 225 E. OF LIGHT CO. RD.HYDROCARBONS,XYLENE,ETHYLBENZENE,TOLUENE,TPH,METALS2/19/88 3B , 3 E,Q,V,2,3* MONSANTO - ANDERS LANE52183 2830 ANDERS LANE, HOUSTONVOCS 5/13/83 0A , 5C ENASA, LBJ SPACE CENTER 71022 2001 NASA ROAD 1FREON 113 10/30/87 3A,2B , 4 E,Q,V,2OCCIDENTAL CHEM CORP - DEER PARK 30550 TIDAL ROAD, DEER PARK, TXCHLORINATED SOLVENTS 1/1/87 0 , 3 EOLD DOMINION INDUSTRIES 30969 IE FLO SITE, 3501 WEST 11TH ST, HOUSTONSOLVENTS 5/1/95 0 , 4 EQUANTUM CHEMICAL 30049 1515 MILLER CUTOFF RD, DEER PARKLNAPL,METALS,BETX,TCE,PCB'S,VINYL CHLORIDE6/1/92 3A,3C , 2A,3 E,QREED TOOL CO. 31202 650 NAVIGATION BLVD., HOUSTONORGANICS, METALS 3/1/91 0 , 2A EQRHONE POULENC - HOUSTON 31019 8615 MANCHESTER RD., HOUSTON 77012FE, NAPTHALENE, CO, NI, ZN 6/27/91 3A , 2,6A E,Q,VROHM & HAAS 30041 INTERSECTION OF HWY. 134 & 225, DEERPARK SULFATE 2/10/87 3A , 4,5 E,Q,V,2,3ROHM AND HAAS BAYPORT, INC 31969 BAYPORTVOCS 11/14/93 5 , 0 EROLLINS ENVR. SERVICES 37328 2027 BATTLEGROUND ROAD, DEER PARKCHLOROBENZENE, TCE, 1,2 DCE 7/22/86 3A , 6C E,QSHELL DEVELOPMENT CO - HOUSTON 31304 3333 HWY 6, HOUSTONGASOLINE 1/5/92 0 , 4,5 E,QSHELL OIL COMPANY - DEER PARK 30007 STATE HWY 225, DEER PARKCHLORINATED HYDROCARBONS 1/18/89 3 , 4,5 E,V,1STAUFFER CHEMICAL CO. (FORMER) 31181 8901 HEMPSTEAD, HOUSTONBTEX, PESTICIDES 12/9/86 2B , 4-5 EQV23STINNES CORP. T0236 6922 KATY ROAD, HOUSTONTCE 12/23/92 0 , 1 VSUPERIOR OIL 33864 12401 WESTHEIMER, HOUSTONPESTICIDES 6/26/92 1 , 0 ETENNECO GAS TECHNOLOGY, HSN 31824 5510 S. RICE AVE., HOUSTONPCE AND DAUGHTERCOMPOUNDS11/21/90 0 , 5 ETEXAS DEPT. OF TRANSPORTATION (TXDOT) T0214 HOUSTONCREOSOTE 7/12/93 4 , 2 ETEXAS DEPT. TRANSPORTATION T0238 6922 KATY ROAD, HOUSTONTCE DCE 4/30/93 3 , 3 E,Q,VTNRCC - 73

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPCD/CAPCD/ENFPCD/SUPTEXMARK, INC. (TEXMARK RESINS) 30654 900 CLINTON, GALENA PARKBTEX, STYRENE, NAPTHYLENE 12/2/88 1A , 2A EUNION PACIFIC RAILRAOD, SETTEGAST YARD 34949 7100 KIRKPATRICK BLVD, HOUSTONTPH & BTEX 7/1/94 1B , 5 EWOOD PROTECTION CO. 52101 SOUTH LOOP EAST, HOUSTONPENTACHLOROPHENOL 4/5/89 2B , 2A EV2ALMEDA-SIMMS WASTEWATER TREATMENTPLANTT0009 ALMEDA ROAD AT SIMMS BAYOU, SW HOUSTON SODIUM HYPOCHLORITE 7/15/91 2A , 0 QB. F. GOODRICH (GEON COMPANY) 31077 2400 MILLER CUTOFF ROAD, LAPORTE, TXVOC'S 6/24/93 0 , 4 EQ YBW/IP 20426 2525 W BELLFORT, HOUSTONDCE,TCA,BENZENE,METALS 7/1/91 2A , 2A ECHARTER INTERN. OIL CO. (RESEARCH TRACT) 52087 1503 CENTRAL AVENUE, HOUSTON, TXBENZENE,XYLENE,CHLORINATED 2/1/86 2A , 2B ESOLVENTSHUGHES TOOL DIVISION (HOUSTON) 30323 5425 POLK STREET, HOUSTONTPH,PCE,TCE,DCE 6/1/89 2A , 2A EQVHURRICANE STEEL INDUSTRIES 30690 9600 OLD KATY RD., HOUSTON, TX 77024PCBS - SOIL ONLY ,LONZA, INC. 31409 9700 BAYPORT BLVD. PASADENA, TX,MOBILE WASTE CONTROLS 82892 10,000 MINNESOTA, HOUSTON , TX 77055VOCS,SVOCS,AS 10/15/92 2A , 2A ENALCO CHEMICAL 30601 7701 HWY 90-A, SUGARLAND, TX 77478VOCS,SVOCS,TPH,CHROMIUM 9/18/92 2A , 2A ERHEEM MANUF CO (PICK-A-PART SALVAGE) 30662 1025 LOCKWOOD, HOUSTONPCE,TCE,SOLVENTS 12/28/90 2A , 2A ESCHUMACHER COMPANY, INC. 31579 5610 POLK AVENUE,TENNECO-LA PORTE NATL GAS LIQUIDS 80223 ACETONE, METH.CHLORIDE,CU,PB,CD,ZN2D , 0AIR PRODUCTS MFG. CORP. 30317 1423 HWY. 255, PASADENA TXD990757486LEAD, PCB, NITROTOLUENE 12/14/90 1B , 1A EBRIO REFINING, INC. SUPERFUND SITE 2501 DIXIE FARM RD., SOUTHERN HARRIS CO. 1 1/2MILES S.W. OF GULF FRWY.(I-45 SOUTH) AT DIXIEFARM RD. EXITORGANIC CHEMICALS 5A , 4 E,Q,V,2,3BULL OIL AND CHEMICAL TRANSPORTER TXD0924887 28538 N. EAST HARDY STREET, SPRINGDICHLOROETHANE 7/11/90 1B , 1A E,Q41CHICAGO BRIDGE AND IRON 8900 FAIRBANKS, NORTH HOUSTON ROADPH, SULFATE 7/8/71 1B , 1A QCRYSTAL CHEMICAL SUPERFUNDSITE(SOUTHERN PACIFIC)DIXIE CHEMICAL CO.TXD008088247CRYSTAL CHEMICAL CO. SUPERFUND SITE 3502ROGERDALE RD. HOUSTON, TX.10701 BAY AREA BLVD.ARSENIC, PHENOL 8/26/83 E,Q,V,2,35A 3 ,EPICHLOROHYDRIN,DICHLOROETHENE,TRICHLOROETHENEDIXIE OIL PROCESSORS DIXIE FARM RD., SOUTHERN HARRIS CO.ORGANIC CHEMICALS 5A ,E,Q,V,1,2,3FLUOROCARBON 987979267 10420 OLD KATY ROAD, HOUSTONTRICHLOROETHYLENE 1B , 1A QFRENCH LIMITED SUPERFUND SITEIN N.E. HARRIS CO. 2 MILES S.W. OF CROSBY, TX.BORDERED ON N.W. BY HWY.90 AND ON S. BY GULFPUMP RD.VOLATILE ORGANIC COMPOUNDS,PCB5A , 5 E,Q,V,1,2,3GENEVA INDUSTRIES SUPERFUND SITE - MANYGENEVA INDUSTRIES 9334 CANNIFF ROADETHYLBENZENE, TCE, PCB 1/31/88 5A , 4 E,Q,V,2,3PRPSHOUSTON, TXGULF METALS STATE SUPERFUND SITE NW OF MYKAWA RD. AND ALMEDA-GENOA RD. HEAVY METALS, HYDROCARBONS 9/9/94 3B , 2A E,Q,V,2,3INTERSECTION, HOUSTON, TX.HIGHLANDS ACID PIT (MR. HARRY JOHNSON -HIGHLANDS ACID PIT - AT END OF CLEAR LAKE DR. BENZENE, LEAD, CHROMIUM 4/2/83 5B , 5 E,Q,V,2,3DECEASED)HIGHLANDS, TXHOUSTON LEAD CO. - MR. IRVING GERGER 31085 300 HOLMES RD HOUSTONLEAD, CADMIUM, ARSENIC 10/12/82 0 , 3 E,Q,V,2,3NORTH CAVALCADE SUPERFUND SITE NORTH CAVALCADE STREET SUPERFUND SITECALVACADE ST. ONE MILE WEST OF US 59 AND I610N.CREOSOTE COMPONENTS 8/7/86 5A , 4 E,Q,V,2,3SIKES DISPOSAL PITS SUPERFUND SITE - MANYPRPSSILVER LEAF MANAGEMENTSIKES DISPOSAL PITS-EAST OF SAN JACINTO RIVERON N. SIDE OF HWY 90, CROSBY IN HARRISCOUNTY930 GEMINI ST, .5 MILE FROM NASA, HOUSTONPHENOLS, BENZENE, TOLUENE,VOCDICHLOROETHENE,TRICHLOROETHENE1B , 1A6/30/85 5A , 5 E,Q,V,2,33/17/93 1A , 1A ESOL LYNN (INDUSTRIAL TRANSFORMERS 1415,1417, 1419 SOUTH LOOP WEST HOUSTON, TX TRICHLOROETHENE 3/23/87 5B , 4 E,Q,V,1,2,3(INDUSTRIAL TRANSFORMERS/SOL LYNNTNRCC - 74Q

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPCD/SUPPCD/VCSUPERFUND SITESUPERFUND SITE)SOUTH CAVALCADE STREET SUPERFUND SITE 19880325001 1.5 MILES S.W. OF INTERSECTION OF LOOP 610 AND CREOSOTE CONSTITUENTS, BTEX 5A , 3 E,Q,V,2,3U.S. ROUTE 59 BOUNDED BY CAVALCADE RD. TOTHE NORTH, COLLINGSWORTH ST. TO SOUTHSTAR ENTERPRISE PETROLEUM MARKETINGTERMINAL2661 STEVENS ST., HOUSTON* 900/910 GEMINI SITE532 900 AND 910 GEMINI ROAD, CLEAR LAKE CITY VOCS 5/23/97 1D , 2 E* 922 HOLMES ROAD630 922 HOLMES ROAD, HOUSTONLEAD 10/8/97 0 , 2 E* ASHFORD IV OFFICE BUILDING461 14811 ST. MARY'S LANE, HOUSTONTPH, S-VOCS 2/14/97 0 , 6 EAZTEC MANUFACTURING (HOUSTON) 326 12433 OLD BEAUMONT HIGHWAY, HOUSTONMETAL, SVOCS, VOCS 8/28/96 0 , 3 E* BLAND CADILLAC MULTI-TRACT PROPERTY 539 2100 BAGBY STREET, HOUSTONCHLORINATED SOLVENTS 5/28/97 0 , 3 E* BOWEN TOOLS, INC./AIR LIQUIDE CORPORATION 226 2429 CROCKETT STREET, HOUSTONTPH, PAH, BTEX, METALS 4/12/96 0 , 6B EBRIARWOOD VILLAGE APARTMENTS 211 1711 JAMES BOWIE, BAYTOWNCHLORINATED SOLVENTS 3/25/96 0 , 2 ECAMERON - KATY ROAD FACILITY 221 1000 SILBER ROAD, HOUSTONVOCS 4/2/96 0 , 4 ECHAMPION FOREST SHOPPING CENTER 288 16616 CHAMPION FOREST, HOUSTONSOLVENTS 7/8/96 0 , 4 E* CHANNEL SHIPYARD, INC.317 999 SOUTH LYNCHBURG ROAD, LYNCHBURGTPH, CHORINATED SOLVENTS 8/13/96 0 , 2 E* CITY OF HOUSTON, CITY BLOCK NO. 43468 PRAIRIE, PRESTON, MILAM, TRAVIS STREETS,HOUSTONHYDROCARBONS 2/18/97 0 , 6 E* CLAY ROAD PLAZA SHOPPING CENTER631 16618 CLAY ROAD, HOUSTONCHLORINATED SOLVENTS 10/14/97 0 , 2 ECRAIG'S INTEREST 265 3725 WESTHEIMER, HOUSTONSOLVENTS 5/28/96 0 , 2 E* DAN-LOC BOLT AND GASKET, INC.169 725 NORTH DRENNAN STREET, HOUSTONMETALS, TPH 1/25/96 0 , 2 E* DIXIE ELECTRO PLATING COMPANY495 3001 ENGELKE STREET, HOUSTONMETALS 3/27/97 1 , 2 E* DOUBLE TREE HOTEL - POST OAK BOULEVARD 604 2001 POST OAK BOULEVARD, HOUSTONCHLORINATED SOLVENTS 9/3/97 0 , 2 E* DOUBLETREE HOTEL - DALLAS AVENUE603 400 DALLAS AVENUE, HOUSTONCHLORINATED SOLVENTS 9/3/97 0 , 2 E* ECHO LANE SHOPPING CENTER487 9309 - 9363 KATY FREEWAY, HOUSTONSOLVENTS 3/12/97 0 , 3 E* ELF ATOCHEM NORTH AMERICA, INC.644 18000 CROSBY EASTGATE ROAD, CROSBYMETALS 10/28/97 1 , 2 E* ENTERPRISE AIR CENTER478 8850 WEST MONROE ROAD, HOUSTONHYDROCARBONS, CHLORINATEDSOLVENTS3/6/97 0 , 2 E* ENTERRA OILFIELD RENTAL FACILITY570 11315 WEST LITTLE YORK, HOUSTONMETALS, TPH 7/16/97 0 , 2 E* EPC - NITROGEN BENZENE TRANSFER STATION 593 BAYWAY DRIVE, BAYTOWNTPH 8/13/97 0 , 1 E* EXTRAORDINARY CAR CARE504 3701 SOUTH SHEPHERD, HOUSTONHYDROCARBONS 4/11/97 0 , 2 E* EXXON LAND DEVELOPMENT, INC. PROPERTY 528 22555 NORTH HIGHWAY 59, HOUSTONMETALS, PETROLEUMHYDROCARBONS5/14/97 0 , 1 E* FORMER CHEVRON FACILITY NO. 60108031 599 7610 EASTEX FWY, U.S. 95 @ CROSSTIMBERS, HYDROCARBONS 8/21/97 0 , 2 EHOUSTONFORMER LESCO TRUCKING PROPERTY 140 INTERSECTION SJOLANDER AND WALLISVILLE,BAYTOWNMETALS, TPH, BTEX 11/1/95 0 , 2B EFORMER LONE STAR HEAT TREATING FACILITY 306 5212 CLINTON DRIVE, HOUSTONCHLORINATED SOLVENTS 8/2/96 0 , 0 EFORMER T.S. ALLOYS 173 5022 ASHLEY COURT, HOUSTONCHROMIUM, PCBS 1/29/96 0 , 2B EHALIBURTON GEOPHYSICAL SERVICES FACILITY 422 6909 SOUTHWEST FREEWAY, HOUSTONMETALS, VOCS 12/19/96 0 , 3 E* HALLMARK CLEANERS444 4203 SAN FELIPE, HOUSTONVOCS 1/29/97 0 , 2 E* HI-PORT INCORPORATED547 409 EAST WALLISVILLE ROAD, HIGHLANDSTPH, SVOCS, PESTICIDES 6/12/97 0 , 2 E* HOUSTON LEAD COMPANY145 300 HOLMES ROAD, HOUSTONMETALS 12/6/95 0 , 3 E* HOUSTON METAL PROCESSING COMPANY 440 5225 FIDELITY ROAD, HOUSTONMETALS, PCBS 1/22/97 0 , 2 E* HOUSTON PLANT (LTV CONTINENTAL EMSCO) 415 7600 SOUTH SANTA FE DRIVE, HOUSTONCHLORINATED SOLVENTS 12/11/96 0 , 4 E* INTOOL, INC., PROPERTY TRACT C649 7007 PINEMONT DRIVE, HOUSTONTPH, VOCS 11/12/97 0 , 2 EKIRKWOOD COUNTRY (CHESSINGTON) 215 NE INTERSECTION BISSONNET & S. KIRKWOOD,HOUSTONTPH, METALS 3/29/96 0 , 0 E* KOCH REFINING CHANNELVIEW TERMINAL 574 16514A DE ZEVALA ROAD, CHANNELVIEWHYDROCARBONS, METALS 7/24/97 0 , 3 EKQUE/KNUZ RADIO TRANSMITTER SITE 498 315 NORTH ENNIS STREET, HOUSTONMETALS 2/22/96 0 , 4 ETNRCC - 75OIL, BTEX0 , 4E

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPCD/VC* LAKESIDE SHOPPING VILLAGE316 10900 BLOCK OF WESTHEIMER/WILCREST,CHLORINATED SOLVENTS 8/13/96 0 , 4 EHOUSTON* LAROCHE INDUSTRIES KATY ROAD512 7310 OLD KATY ROAD, HOUSTONPESTICIDES, METALS 4/23/97 0 , 2 ELOOP SHOPPING CENTER 207 9417-9595 SOUTH MAIN, HOUSTONCHLORINATED SOLVENTS 3/19/96 0 , 2 E* LUNSFORD ESTATE PROPERTY / V&G462 1525 NORTH POST OAK ROAD, HOUSTONTPH, VOCS, SVOCS, HERBICIDES,PESTICIDES2/14/97 0 , 2 E* MEMORIAL HEIGHTS243 201 SOUTH HEIGHTS BOULEVARD, HOUSTONMETALS, VOCS 4/25/96 0 , 6 EAPARTMENTS/SURROUNDING LANDMETRO SHARPTOWN BUS OPERATING FACILITY - 130 6890 SOUTHWEST FREEWAY, HOUSTONTPH, BTEX, LEAD 10/16/95 0 , 4 E1NESTE/WRIGHT ASPHALT PRODUCTS COMPANY 159 17310 MARKET STREET, CHANNELVIEWTPH, PETROLEUM SUBSTANCES,LEAD12/28/95 0 , 6B ENORTH VELASCO ROAD PROPERTY (OLD) 334 709 NORTH VELASCO ROAD, HOUSTONMETALS 10/24/95 1 , 2 E* OAK LANE APARTMENTS448 2701 REVERE, HOUSTONTCE 2/5/97 0 , 6 E* OAKITE PRODUCTS FACILITY526 10100 HIRSCH ROAD, HOUSTONVOCS, METALS 5/14/97 0 , 2 EOCCIDENTAL CHEMICAL CORPORATION - DEER 348 1000 TIDAL ROAD, DEER PARKCHLORINATED SOLVENTS/METALS 9/19/96 0 , 3 EPARK* OFFICE DEPOT181 6869 OLD KATY ROAD, HOUSTONMETALS, SVOCS, VOCS 2/15/96 0 , 6 E* OFFICE/WAREHOUSE FACILITY - KEYPORT LANE 485 1125 KEYPORT LANE, HOUSTONMETALS, VOCS 3/11/97 0 , 2 EOLD KATY ROAD PROPERTY 191 10420 OLD KATY ROAD, HOUSTONCHLORINATED SOLVENTS 3/5/96 0 , 4 EOXFORD APARTMENTS AND SURROUNDING 329 10909 GULF FREEWAY, HOUSTONHYDROCARBONS 8/30/96 0 , 6 EPROPERTY* OXID, L.P.614 101 CONCRETE STREET, HOUSTONHHC, SOLVENTS, METALS 9/25/97 0 , 2 EPENTRON INCORPORATED 281 323 AVENUE J, HOUSTONPETROLEUM HYDROCARBONS 6/25/96 0 , 2 EPILGRIM CLEANERS - BRIAR FOREST AND 112 1498 WILCREST, HOUSTONPCE 9/11/95 0 , 3 EWILCRESTPILGRIM CLEANERS - BRIAR RIDGE 063 2538-A BRIAR RIDGE, HOUSTONPCE 9/11/95 0 , 4 EPILGRIM CLEANERS - CHIMNEY ROCK 061 6701 CHIMNEY ROCK, HOUSTONPCE 9/11/95 0 , 4 EPILGRIM CLEANERS - FONDREN 116 11322 FONDREN, HOUSTONPERC AND OTHER CHLORINATEDORGANICS9/11/95 0 , 4 EPILGRIM CLEANERS - JONES ROAD 048 10154 JONES ROAD, HOUSTONPERC 9/11/95 0 , 4 EPILGRIM CLEANERS - KUYKENDAHL 115 15386 KUYKENDAHL, HOUSTONPERC AND OTHER CHLORINATED 9/11/95 0 , 2 EORGANICSPILGRIM CLEANERS - MASON ROAD 113 1775 MASON ROAD, HOUSTONPERC AND OTHER CHLORINATEDORGANICSPILGRIM CLEANERS - SAN FELIPE 114 6415 SAN FELIPE, HOUSTONPERC AND OTHER CHLORINATEDORGANICS9/11/95 0 , 2 E9/11/95 0 , 4 EPILGRIM CLEANERS - STELLA LINK 117 6723 STELLA LINK, HOUSTONPCE 9/11/95 0 , 2 EPILGRIM CLEANERS - WEST BELLFORT 062 10816 WEST BELLFORT, HOUSTONPCE 9/11/95 0 , 2 E* PINE FOREST #23529 447 WEST 38TH STREET, HOUSTONHYDROCARBONS 5/14/97 0 , 3 E* PLEASANT HILL VILLAGE APARTMENTS544 3800 LYONS @ PANNELL STREET, HOUSTONTPH, CHLORINATED SOLVENTS, 6/6/97 0 , 2 EMETALS* PROPOSED LAMONS GASKET PROPERTY 624 INTERSECTION AIRPORT BLVD/TEWANTIN DRIVE,HOUSTONVOCS 10/3/97 0 , 6 EPROVIDENCE SHOPPING CENTER 070 9404 SOUTH STATE HIGHWAY 6, HOUSTONVOCS 9/29/95 0 , 4 E* SILVER'S PROPERTY503 BROGDEN AND IH-10, HOUSTONHYDROCARBONS 4/11/97 0 , 6C ESMITH INDUSTRIES 275 8300 HEMPSTEAD HIGHWAY, HOUSTONMETALS AND VOLATILES, PCBS 6/13/96 0 , 2 E* SOUTH COAST TERMINALS (MANCHESTER 457 9317 EAST AVENUE S, HOUSTONVOC, BTEX, PAH 2/11/97 0 , 3 EFACILITY)* STOP N' GO NO. 2567602 9365 SOUTH MAIN STREET, HOUSTONBTEX 9/5/97 0 , 2 ESUMMIT NORTHGATE RESTRICTED RESERVE "B" 235 2204A FM 1960, HOUSTONCHLORINATED SOLVENTS 4/22/96 0 , 4 ESUMMIT NORTHGATE RESTRICTED RESERVE "C" 236 2204A, B, C FM 1960, HOUSTONCHLORINATED SOLVENTS 4/22/96 0 , 4 ESYSTEM PROPERTY DEVELOPMENT CO. (SEE 378 1301 PRESTON AVENUE, HOUSTONBTEX, METALS, VOCS, PAHS 10/22/96 0 , 3 ETNRCC - 76

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPCD/VCPST*VCP 205)T & C LYNDISFARNE (FMC PROPERTY)563 10516 OLD KATY ROAD, HOUSTONCHLORINATED SOLVENTS 7/2/97 0 , 2 E* TENNECO TECHNOLOGY CENTER661 5510 SOUTH RICE AVENUE, HOUSTONTPH, VOC 12/2/97 0 , 5 ETENNECO/OCCIDENTAL CHEMICAL 102 4403 PASADENA FREEWAY, PASADENAVOCS, METALS 10/19/95 1 , 3 E* THE RECTORSEAL CORPORATION - SPENWICK 613 2601 SPENWICK ROAD, HOUSTONPETROLEUM9/19/97 0 , 2 EROADSUBSTANCES/SOLVENTS* THERMO ELECTRON CORPORATION531 411 JACKSON HILL STREET, HOUSTONVOCS, HYDROCARBONS, METALS 5/15/97 0 , 2 E* THREE FOUNTAINS SQUARE SHOPPING CENTER 290 1808-1940 FOUNTAINVIEW, HOUSTONTPH 7/8/96 0 , 6 ETOM E. FAIREY COMPANY 313 5902 WEST 34TH STREET, HOUSTONHYDROCARBONS 8/13/96 0 , 2B ETOWN AND COUNTRY SHOPPING CENTER 126 1000 WEST SAM HOUSTON PARKWAY, HOUSTON METALS 9/21/95 0 , 6C ETOWN AND COUNTRY VILLAGE SHOPPING 152 12850 MEMORIAL DRIVE, HOUSTONCHLORINATED SOLVENTS 12/21/95 0 , 4 ECENTERTUNEUP MASTERS STORE NO. 909 303 665 MAXEY ROAD, HOUSTONWASTE OIL 7/31/96 0 , 2 E* U.S. HOME BUILDING549 1800 WEST LOOP SOUTH, HOUSTONPETROLEUM SUBSTANCES 6/17/97 0 , 2 E* UNOCCUPIED INDUSTRIAL SITE (FONTENOT) 401 6125 INDUSTRIAL WAY, HOUSTONVOCS, METALS 11/14/96 0 , 2 EWESLAYAN PLAZA WEST SHOPPING CENTER 621 WESLAYAN AT BISSONNET, HOUSTONVOCS 9/1/95 0 , 3 EWESTCHASE SHOPPING CENTER 121 9709 WESTHEIMER ROAD, HOUSTONVOCS 9/20/95 0 , 4 E* WESTERN ATLAS LOGGING SERVICES SHOP 460 19130 OIL CENTER BOULEVARD, HOUSTONMETALS, VOCS 2/11/97 0 , 2 EFACILITYWESTLAKE INDUSTRIES, INC. 013 17011 OLD BEAUMONT HIGHWAY 90, HOUSTON VOCS 9/19/95 0 , 2 E* A & A INC112327 8601 MARTIN LUTHER KING BLVD, HOUSTONUNKNOWN 5/27/97 1B , 1A E,QA J HUNT DISTRIBUTING 093771 8801 S MAIN ST, HOUSTONUNKNOWN 10/3/89 2 , 2A E,Q* A N RUSCHE109126 4904 AIRLINE, HOUSTONGASOLINE 1/17/95 2 , 2A E,QA N RUSCHE DIST CO 093847 7330 S LAKE HOUSTON PKWY, HOUSTONDIESEL 10/12/89 2A , 2A E,QA N RUSCHE DIST CO 098249 9223 EASTEX FWY, HOUSTONGASOLINE, DIESEL 3/6/91 2 , 2A E,QA N RUSCHE DIST CO 098545 11404 HWY 290, HOUSTONGASOLINE 4/8/91 2 , 2A E,QA N RUSCHE DIST CO 098993 14036 LEE RD, HOUSTONGASOLINE, WASTE OIL 5/9/91 2A , 1A E,Q* A N RUSCHE DISTRIBUTING111483 21615 IH 45, HOUSTONGASOLINE 7/29/96 2 , 2A E,QA N RUSCHE DISTRIBUTING 111485 3655 W OREM, HOUSTONGASOLINE 7/28/96 2 , 6 E,QA N RUSCHE DISTRIBUTING 111486 4509 HWY 6, HOUSTONGASOLINE 7/29/96 2 , 6 E,QA N RUSCHE DISTRIBUTING 111488 7730 DECKER DR, HOUSTONGASOLINE 7/28/96 2 , 2A E,QA N RUSCHE DISTRIBUTING 111489 1802 W MOUNT HOUSTON RD, HOUSTONGASOLINE, DIESEL 7/28/96 2 , 6 E,Q* A N RUSCHE DISTRIBUTING111496 14427 IH 10, HOUSTONUNKNOWN 8/22/96 2 , 2A E,Q* A N RUSCHE DISTRIBUTING111815 4137 CAVALCADE, HOUSTONUNKNOWN 1/17/97 2 , 2A E,QA N RUSCHE DISTRIBUTING 111849 13205 IH 10, HOUSTONGASOLINE 10/20/96 2 , 2A E,QA N RUSCHE DISTRIBUTING 111853 11515 HWY 249, HOUSTONGASOLINE 10/24/96 2 , 2A E,Q* A N RUSCHE DISTRIBUTING CO109442 18903 FM 1488, MAGNOLIAGASOLINE 4/13/95 2 , 2A E,Q* A N RUSCHE DISTRIBUTING CO110521 6951 W FM 1960, HOUSTONUNKNOWN 2/26/96 2 , 2A E,QA N RUSCHE DISTRIBUTING CO 111892 1003 STUDEMONT, HOUSTONGASOLINE 10/20/96 2A , 6 E,Q* A N RUSCHE DISTRIBUTING CO112376 10760 WESTHEIMER, HOUSTONGASOLINE 5/3/97 2 , 2A E,Q* A N RUSCHE DISTRIBUTING CO112377 640 W CROSSTIMBERS, HOUSTONGASOLINE 5/7/97 2 , 2A E,Q* A N RUSCHE DISTRIBUTING CO112378 2251 S VOSS RD, HOUSTONGASOLINE 5/3/97 1B , 1A E,Q* A N RUSCHE DISTRIBUTING CO112379 210 E FM 1960, HOUSTONGASOLINE 5/1/97 2 , 2A E,Q* A N RUSCHE DISTRIBUTING CO112380 6107 HILLCROFT, HOUSTONGASOLINE 5/1/97 2 , 2A E,Q* A N RUSCHE DISTRIBUTING CO112381 380 UVALDE, HOUSTONGASOLINE 5/1/97 2 , 2A E,Q* A-1 FOOD MART098647 2134 BINGLE, HOUSTONDIESEL 12/12/90 2 , 2A E,Q* ADAMS RESOURCES & ENERGY INC096805 6603 KIRBYVILLE, HOUSTONWASTE OIL 8/29/90 2 , 2A E,QADT SECURITY SYSTEMS 099608 2710 BISSONNET, HOUSTONGASOLINE 7/22/91 2A , 6 E,QTNRCC - 77

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTAKBER ALLAUDDIN 111530 14648 WALTERS RD, HOUSTONGASOLINE 8/19/96 5B , 2A E,Q* ALBERT ABUSALAH112167 8521 STELLA LINK, HOUSTONUNKNOWN 3/10/97 5B , 4 E,QALIEF ISD 092822 6150 SYNOTT RD, ALIEFGASOLINE 3/31/89 2 , 6 E,QALIEF PETROLEUM INC 111872 3944 BROADWAY, HOUSTONGASOLINE 10/10/96 2 , 2A E,Q* ALLIANCE ENTERPRISES INC112468 12700 NORTHBOROUGH DR, HOUSTONGASOLINE 6/8/97 1B , 1A E,QAMERICAN FREIGHTWAY INC 094623 4004 IRVINGTON BLVD, HOUSTONGASOLINE 2/7/90 2A , 6 E,QAMERICAN FREIGHTWAYS 093742 4300 IRVINGTON BLVD, HOUSTONDIESEL, GASOLINE 9/27/89 2 , 2A E,QAMERICAN GENERAL LIFE INS. 092072 2777 ALLEN PKWY, HOUSTONGASOLINE 12/15/85 2 , 4 E,QAMERICAS CUP YOGURT 092946 913 WESTHEIMER, HOUSTONGASOLINE 5/3/89 2A , 2A E,QANGEL BROTHERS (ANGEL'S GAS & 091030 7119 BAYWAY DR, BAYTOWNGASOLINE 7/12/85 2 , 2A E,Q* ANGELS ENTERPRISE108916 820 W BARBOURS CUT BLVD, LA PORTEGASOLINE 2/4/94 2 , 2A E,Q* ANGELS ENTERPRISES107869 707 W MAIN, LA PORTEGASOLINE 2/8/94 2 , 2A E,QAQIL AND SON 091377 8430 FULTON ST, HOUSTONGASOLINE 6/18/87 2A , 2A E,QARAMCO ASSOCIATED CO 108135 16875 JOHN F KENNEDY BLVD, HOUSTONUNKNOWN 3/25/94 2 , 6 E,QARCO PRODUCTS CO 111766 1809 W GRAY, HOUSTONDIESEL, WASTE OIL, HYDR FLUID 4/26/96 2 , 2A E,QASTROWORLD INC 103877 9001 KIRBY, HOUSTONGASOLINE 7/6/92 2A , 6 E,QAT&T COMMUNICATIONS INC 098485 1407 JEFFERSON ST, HOUSTONDIESEL 3/11/91 2A , 6 E,QAT&T COMMUNICATIONS INC 105978 19505 N IH--45, SPRINGDIESEL 10/22/92 2A , 6 E,QATCHISON TOPEKA & SANTA FE RR 108794 214 BRISBANE, HOUSTONGASOLINE 7/25/94 2 , 2A E,Q* AUTOMATED CAR WASH SYS., INC.112014 1038 GESSNER, HOUSTONUNKNOWN 1/2/97 2 , 2A E,QAVIS RENT A CAR SYSTEM 091244 4931 WRIGHT RD, HOUSTONGASOLINE 3/1/85 2 , 4 E,QAVIS RENT A CAR SYSTEM 093279 2120 LOUISIANA, HOUSTONGASOLINE 7/7/89 2 , 2A E,QAVIS RENT A CAR SYSTEM 095393 7714 AIRPORT BLVD, HOUSTONWASTE OIL, GASOLINE 4/20/90 2 , 3 E,QAVIS RENT A CAR SYSTEM 097514 4825 RICHMOND AVE, HOUSTONGASOLINE 5/18/90 2 , 2A E,Q* BANK OF HOUSTON105297 4400 ALMEDA, HOUSTONGASOLINE 10/5/92 2A , 1A E,QBANK ONE TEXAS NA 096578 1800 SHERWOOD FOREST DR, HOUSTONGASOLINE, DIESEL 8/16/90 2 , 2A E,QBANK ONE TEXAS NA 107569 1605 N LOOP 610 W, HOUSTONGASOLINE, DIESEL 8/23/93 2 , 2A E,QBAY OIL CO 094963 7901 LONG POINT RD, HOUSTONGASOLINE 2/2/90 2 , 2A E,QBELLAIRE RESTAURANT HOLDINGS 108617 5201 BELLAIRE BLVD, BELLAIREGASOLINE 9/1/94 2 , 2A E,Q* BELLFORT TEXACO109965 7702 BELLFORT, HOUSTONUNKNOWN 4/25/95 2 , 2A E,QBOB BAKER MOTORS 097750 4905 N SHEPHERD DR, HOUSTONGASOLINE 12/21/90 2 , 6 E,QBORDEN INC - DAIRY DIVISION 102353 2020 TEXAS AVE, HOUSTONWASTE OIL 10/11/92 2 , 2A E,QBOULOS ASSAD 099480 7152 PARKER RD, HOUSTONGASOLINE 3/19/91 5B , 1A E,QBOYLES GALVANIZING CO 097092 5910 CUNNINGHAM, HOUSTONGASOLINE, DIESEL 5/8/91 2 , 6 E,QBPS EQUIPMENT RENTAL & SALES 095357 3201 MAXROY ST, HOUSTONGASOLINE 3/8/90 2 , 2A E,QBRIGHT TRUCK LEASING CORP 092446 3669 EASTEX FWY, HOUSTONUNKNOWN 12/21/88 2 , 6 E,QBRITTON RIVER OAKS PROPERTIES 102653 3272 WESTHEIMER RD, HOUSTONGASOLINE, WASTE OIL 9/4/91 2 , 2A E,QBROWN & ROOT INC 097624 14035 INDUSTRIAL RD, HOUSTONGASOLINE, DIESEL 11/26/90 2A , 6 E,QBROWN & ROOT INC 099070 2828 CLINTON, HOUSTONGASOLINE 5/23/91 2 , 2A E,QBROWN & ROOT INC 100187 3302 RICHARDSON, HOUSTONGASOLINE, DIESEL, KEROSENE 8/19/91 2 , 2A E,Q* BROWN & ROOT INC111061 8601 TRAVELAIR, HOUSTONGASOLINE, AV-GAS, JET FUEL 1/15/97 2 , 2A E,Q* BRUCE ANGEL106409 711 W MAIN, LA PORTEGASOLINE 3/31/93 2 , 2A E,Q* BRYANT MANAGEMENT COMPANY106564 1050 W RANKIN RD, HOUSTONGASOLINE 2/22/93 2 , 2A E,Q* BUDGET RENT A CAR108469 15840 JOHN F KENNEDY BLVD, HOUSTONGASOLINE 4/11/94 2 , 2A E,Q* BUDGET RENT A CAR109004 920 STREY LN, HOUSTONGASOLINE 1/5/95 2A , 1A E,QBUDGET RENT A CAR CORP 094060 4733 RICHMOND AVE, HOUSTONGASOLINE 11/15/89 2 , 3 E,QBUDGET RENT A CAR CORP 095781 1010 WEBSTER, HOUSTONGASOLINE 6/11/90 2 , 2A E,Q* BUDGET RENT A CAR CORP108522 7710 AIRPORT BLVD, HOUSTONGASOLINE 6/10/94 2 , 2A E,QTNRCC - 78

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTCALHOUN ROAD SITE 106341 6919 CALHOUN RD, HOUSTONGASOLINE 3/2/92 5B , 6 E,QCANADIAN PACIFIC PROPERTIES 105268 1800 MAIN ST, HOUSTONUNKNOWN 10/20/92 2 , 6 E,QCARLOS ALFARO 102306 415 ALMEDA GENOA, SOUTH HOUSTONGASOLINE, DIESEL 3/23/92 5B , 1A E,QCAROLA MEHL 093200 9669 IH-10, HOUSTONGASOLINE 12/1/88 2 , 2A E,Q* CAVENHAM REALTY INC106852 600 LOCKWOOD, HOUSTONGASOLINE, DIESEL 6/22/93 2 , 2A E,QCENTRAL TRANSPORTATION SYS INC 095990 6666 IH-45, HOUSTONGASOLINE 1/2/90 2 , 2A E,QCENTRO CRISTIANO ELALPHALAOME 091154 3750 N MAIN ST, HOUSTONGASOLINE 9/10/86 2A , 1A E,Q* CHANNEL EQUIPMENT CO099673 1006 VISTA, PASADENADIESEL 7/27/91 2 , 2A E,QCHARLES AND LOANNA LYONS 108132 2416 E DAVIS, CONROEGASOLINE, DIESEL 5/2/94 2 , 2A E,QCHARLIE THOMAS AUTOWORLD 096603 18900 EASTEX FWY, HUMBLEGASOLINE 8/17/90 2 , 2A E,Q* CHAU & DONNA TANG107671 150 E LITTLE YORK, HOUSTONGASOLINE 11/22/93 2 , 2A E,QCHAU DUC PHAN 100296 10902 SHADOW WOOD DR, HOUSTONGASOLINE 9/18/91 2A , 1A E,QCHAWDAHARRY RASCHID 096549 4002 LOCKWOOD, HOUSTONWASTE OIL 7/20/90 5B , 6 E,QCHEVRON PIPELINE CO 096444 15210 AMERICAN PETROLEUM RD, GALENA PARK GASOLINE 8/10/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091163 9002 CHIMNEY ROCK, HOUSTONGASOLINE 7/3/86 2 , 4 E,QCHEVRON PRODUCTS COMPANY 091463 6027 KIRBY DR, HOUSTONGASOLINE 9/14/87 2 , 4 E,QCHEVRON PRODUCTS COMPANY 091932 7330 SW HWY 59, HOUSTONUNKNOWN 4/26/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091934 12860 MEMORIAL DR, HOUSTONGASOLINE 6/10/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092081 2025 CAMPBELL, HOUSTONGASOLINE 8/16/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092136 4400 LOCKWOOD, HOUSTONGASOLINE 9/19/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092157 14803 MEMORIAL DR, HOUSTONGASOLINE 9/1/88 2 , 5 E,QCHEVRON PRODUCTS COMPANY 092197 7931 SOUTHWEST FWY, HOUSTONGASOLINE 10/6/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092216 9602 HILLCROFT, HOUSTONGASOLINE 10/14/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092262 8530 GULF FWY, HOUSTONGASOLINE 10/11/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092288 14920 OLD HUMBLE RD, HOUSTONGASOLINE 10/3/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092387 10901 BELLAIRE BLVD, HOUSTONGASOLINE 12/18/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092520 9745 KATY FWY, HOUSTONUNKNOWN 12/28/88 2 , 5 E,QCHEVRON PRODUCTS COMPANY 092642 13202 MEMORIAL DR, HOUSTONUNKNOWN 2/8/89 2 , 5 E,QCHEVRON PRODUCTS COMPANY 092764 3503 GULF FWY, HOUSTONGASOLINE 3/17/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092782 4103 BRAESWOOD, HOUSTONGASOLINE 3/24/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092838 7235 WOODRIDGE, HOUSTONGASOLINE 4/18/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092889 5001 BEECHNUT, HOUSTONGASOLINE 4/17/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092890 3669 1/2 EASTEX FWY, HOUSTONGASOLINE 4/11/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092942 4503 GARTH RD, BAYTOWNGASOLINE 8/30/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093021 2821 RED BLUFF, PASADENAUNKNOWN 5/17/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093418 15830 HWY 290, HOUSTONGASOLINE 7/21/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 093774 550 HEIGHTS BLVD, HOUSTONGASOLINE 2/22/89 2 , 3 E,QCHEVRON PRODUCTS COMPANY 093778 4680 BEECHNUT ST, HOUSTONGASOLINE 6/22/89 2 , 5 E,QCHEVRON PRODUCTS COMPANY 093787 7050 TELEPHONE RD, HOUSTONGASOLINE 10/18/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 093939 14803 IH-10, HOUSTONGASOLINE 10/27/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 093940 901 GESSNER, HOUSTONGASOLINE 10/27/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094002 6343 WOODWAY, HOUSTONGASOLINE 11/6/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094059 10315 CULLEN, HOUSTONGASOLINE 12/7/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094062 5020 BELLAIRE BLVD, BELLAIREGASOLINE 11/15/89 2A , 6 E,QCHEVRON PRODUCTS COMPANY 094138 3802 WHEELER, HOUSTONGASOLINE 12/6/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094139 619 WAYSIDE, HOUSTONGASOLINE 12/11/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094202 3839 SE LOOP 610 E, HOUSTONGASOLINE 12/15/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094400 12703 BISSONNET RD, HOUSTONGASOLINE 1/3/90 2A , 6 E,QTNRCC - 79

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTCHEVRON PRODUCTS COMPANY 094548 7446 MARTIN LUTHER KING BLVD, HOUSTONGASOLINE 1/16/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 096088 9161 WALLISVILLE, HOUSTONGASOLINE 6/7/90 2 , 5 E,QCHEVRON PRODUCTS COMPANY 096093 4303 OLD SPANISH TRL, HOUSTONGASOLINE 5/25/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 096153 1619 E FM 1960, HUFFMANGASOLINE 4/30/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 096577 17502 N IH--45, HOUSTONGASOLINE 8/23/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 097543 4502 FM 1960, HOUSTONGASOLINE 6/27/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 098123 13648 HWY 249, HOUSTONGASOLINE 3/1/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 098348 2528 S IH--45, HOUSTONGASOLINE 3/22/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 099773 1820 BRITTMORE, HOUSTONGASOLINE 5/18/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 100438 9303 W IH--10, HOUSTONGASOLINE 10/7/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 100439 22607 HWY 149, TOMBALLGASOLINE 10/7/91 2 , 4 E,QCHEVRON PRODUCTS COMPANY 104286 5415 FANNIN ST, HOUSTONGASOLINE 12/24/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 104434 631 MCCARTY, HOUSTONGASOLINE 3/27/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 104722 9198 BELLAIRE BLVD, HOUSTONGASOLINE 3/27/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 104748 9598 S MAIN, HOUSTONGASOLINE 4/1/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 104904 4005 WESTHEIMER RD, HOUSTONGASOLINE 2/23/90 2 , 4 E,Q* CHEVRON PRODUCTS COMPANY106351 1039 YALE, HOUSTONGASOLINE 2/16/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106489 6237 BELLAIRE, HOUSTONGASOLINE 3/17/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106527 2610 HWY 146, BAYTOWNUNKNOWN 2/4/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106594 6783 HWY 6, HOUSTONGASOLINE 3/17/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106745 5600 MEMORIAL, HOUSTONGASOLINE, WASTE OIL 6/2/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108046 717 N LOOP 610 E, HOUSTONGASOLINE 12/21/93 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY108061 16702 STUEBNER AIRLINE, HOUSTONGASOLINE 1/19/94 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108087 8550 ALMEDA, HOUSTONGASOLINE 6/30/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108433 7017 FM 1960, HUMBLEGASOLINE 7/19/94 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108796 1022 HWY 146, LA PORTEGASOLINE 9/6/94 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108797 10245 MARKET, JACINTO CITYGASOLINE 9/6/94 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY108817 1002 MONTROSE, HOUSTONGASOLINE 10/26/94 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110018 8001 BROADWAY, HOUSTONGASOLINE 10/26/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110034 922 W ALABAMA, HOUSTONGASOLINE 11/6/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110069 1702 FOUNTAINVIEW, HOUSTONUNKNOWN 11/13/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110082 1401 LOCKWOOD, HOUSTONUNKNOWN 11/1/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110117 2539 BISSONNET, HOUSTONGASOLINE 12/8/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110164 1812 ELLA BLVD, HOUSTONGASOLINE 10/26/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110165 733 W NORTH LOOP, HOUSTONGASOLINE 10/27/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110166 3310 KATY FWY, HOUSTONGASOLINE 11/2/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110222 903 DAIRY ASHFORD ST, HOUSTONGASOLINE 12/21/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110253 9655 WESTHEIMER, HOUSTONGASOLINE 12/18/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110279 12102 VETERANS MEMORIAL, HOUSTONGASOLINE 1/3/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110280 8003 ANTOINE, HOUSTONGASOLINE 12/18/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110281 5101 ANTOINE, HOUSTONGASOLINE 12/18/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110283 17627 KUYKENDAHL, SPRINGGASOLINE 12/21/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110286 19607 HWY 45, SPRINGGASOLINE 1/15/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110324 11525 NORTHWEST FWY, HOUSTONGASOLINE 1/11/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110360 6606 LAWNDALE, HOUSTONUNKNOWN 1/15/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110361 8370 WINKLER, HOUSTONGASOLINE 1/16/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110432 3210 TREASCHWIG, HOUSTONGASOLINE 1/26/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110458 2123 HWY 90, CROSBYGASOLINE 1/26/96 2 , 2A E,QTNRCC - 80

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPST* CHEVRON PRODUCTS COMPANY110480 6155 S LOOP 610 E, HOUSTONGASOLINE 1/26/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110482 13303 CULLEN, HOUSTONGASOLINE 1/26/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110547 11242 VETERANS MEMORIAL, HOUSTONGASOLINE 1/26/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110550 13811 HWY 59, SUGAR LANDGASOLINE 2/7/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110556 2750 GESSNER, HOUSTONGASOLINE 3/20/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110557 20003 KATY FWY, KATYGASOLINE 2/15/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110560 8545 BRAESWOOD, HOUSTONGASOLINE 2/5/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110567 11701 KATY FWY, HOUSTONGASOLINE 12/18/95 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110575 2218 N LOOP W, HOUSTONGASOLINE 2/27/96 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY112100 3941 FONDREN, HOUSTONGASOLINE 2/4/97 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY112785 5701 SHEPHERD, HOUSTONUNKNOWN 11/19/97 1B , 1A E,QCHEVRON USA 107057 1316 HOUSTON, SOUTH HOUSTONGASOLINE 9/15/93 1B , 1A E,QCHEVRON USA 110273 3651 HWY 6, HOUSTONGASOLINE 1/11/96 2A , 6 E,QCHEVRON USA 110278 13555 KUYKENDAHL, HOUSTONGASOLINE 12/18/95 2A , 6 E,QCHEVRON USA 110431 6005 JENSEN, HOUSTONGASOLINE 1/29/96 2A , 6 E,QCHEVRON USA 110433 14647 WOODFOREST, CHANNELVIEWGASOLINE 1/26/96 2A , 6 E,QCHEVRON USA 110481 6333 TELEPHONE, HOUSTONGASOLINE 1/26/96 2A , 6 E,QCHEVRON USA 110502 5505 LOCKWOOD, HOUSTONGASOLINE 3/22/93 2A , 6 E,QCHEVRON USA 110542 87 S MASON RD, KATYGASOLINE 2/27/96 2 , 6 E,QCHEVRON USA 110551 10720 S POST OAK, HOUSTONGASOLINE 1/30/96 2A , 6 E,QCHEVRON USA 110558 11102 BRIAR FOREST, HOUSTONGASOLINE 2/12/96 2A , 6 E,QCHEVRON USA 110561 12405 S GESSNER, HOUSTONGASOLINE 2/5/96 2A , 6 E,QCHEVRON USA 110576 9435 HOUSTON ROSSLYN, HOUSTONGASOLINE 2/27/96 2A , 6 E,QCHEVRON USA INC 091863 3503 DOWLING, HOUSTONGASOLINE 4/4/88 2 , 3 E,QCHEVRON USA INC 092519 5851 W AIRPORT, HOUSTONUNKNOWN 1/11/89 2A , 6 E,QCHEVRON USA INC 095587 2601 S SHEPHERD, HOUSTONGASOLINE 5/9/90 2A , 6 E,QCHEVRON USA INC 095685 1619 ATASCOSITA, HUFFMANGASOLINE 6/5/90 2A , 2A E,QCHEVRON USA INC 096090 3802 S GESSNER, HOUSTONGASOLINE 6/7/90 2 , 6 E,QCHEVRON USA INC 097080 14810 GALVESTON, WEBSTERUNKNOWN 10/29/90 2A , 6 E,QCHEVRON USA INC 107797 3810 LITTLE YORK, HOUSTONGASOLINE 12/28/93 2 , 6 E,QCHEVRON USA INC 108089 10902 BISSONNET, HOUSTONGASOLINE 2/3/94 2A , 6 E,QCHEVRON USA INC 108315 11302 FONDREN, HOUSTONGASOLINE 3/25/94 2 , 2A E,QCHEVRON USA INC 108795 1195 EDGEBROOK, HOUSTONGASOLINE 9/6/94 2A , 6 E,Q* CHEVRON USA PRODUCTS CO105977 17555 W MONTGOMERY, HOUSTONGASOLINE 1/14/93 2 , 5 E,QCHRISTY (MRS) G W JR 105105 21 SPENCER HWY, HOUSTONGASOLINE 8/24/92 1B , 1A E,QCIRCLE K BANKRUPTCY 093545 6200 WESTHEIMER, HOUSTONGASOLINE 8/16/89 2 , 2A E,QCIRCLE K CORP 091108 1007 1ST, HUMBLEGASOLINE 8/16/86 2 , 2A E,QCIRCLE K CORP 091400 13006 ALDINE, HOUSTONGASOLINE 7/14/87 2 , 4 E,QCIRCLE K CORP 093416 3920 LOCKWOOD DR, HOUSTONGASOLINE 2/1/86 2 , 2A E,QCIRCLE K CORP 093457 2110 ALEXANDER AVE, BAYTOWNGASOLINE 7/29/89 2 , 4 E,QCIRCLE K CORP 095112 1109 TELEPHONE RD, HOUSTONGASOLINE 1/9/90 2 , 4 E,QCIRCLE K CORP 105149 23115 ALDINE WESTFIELD, HOUSTONGASOLINE 10/26/90 2A , 6 E,Q* CIRCLE K CORP108459 6400 HARRISBURG, HOUSTONGASOLINE 8/3/94 2 , 2A E,QCITY OF HOUSTON 091472 61 RIESNER ST, HOUSTONGASOLINE 9/24/87 2 , 2A E,QCITY OF HOUSTON 091826 5617 NECHES, HOUSTONDIESEL 4/20/88 2A , 6 E,QCITY OF HOUSTON 092363 801 GILLETTE, HOUSTONGASOLINE 11/28/88 2A , 6 E,QCITY OF HOUSTON 096920 11500 S POST OAK, HOUSTONUNKNOWN 9/18/90 2 , 2A E,QCITY OF HOUSTON 098848 61 RIESNER ST, HOUSTONGASOLINE 9/4/00 2 , 2A E,QTNRCC - 81

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTCITY OF HOUSTON 098851 61 RIESNER ST, HOUSTONGASOLINE 5/8/91 2 , 2A E,QCITY OF HOUSTON 098884 7700-780 AIRPORT, HOUSTONJET FUEL 5/6/91 2 , 2A E,Q* CITY OF HOUSTON100694 8251 TRAVELAIR, HOUSTONAV-GAS 10/3/91 2 , 2A E,QCITY OF HOUSTON 104815 1255 JUDIWAY ST, HOUSTONGASOLINE, DIESEL, WASTE OIL 1/24/92 2 , 4 E,Q* CITY OF HOUSTON105095 222 MILBY, HOUSTONGASOLINE, WASTE OIL 10/19/92 2 , 4 E,QCITY OF HOUSTON 105201 8923 RANDOLPH, HOUSTONDIESEL, AV-GAS 11/3/92 2 , 6 E,Q* CITY OF HOUSTON105219 801 GILLETTE, HOUSTONDIESEL 10/29/92 2 , 2A E,Q* CITY OF HOUSTON105446 8430 LARSON, HOUSTONJET FUEL 11/1/92 2 , 2A E,QCITY OF HOUSTON 107399 8205 N BAYOU, HOUSTONGASOLINE 11/2/93 2A , 6 E,QCITY OF HOUSTON 107505 6902 BELLAIRE BLVD, HOUSTONGASOLINE, DIESEL 11/29/93 2 , 2A E,Q* CITY OF HOUSTON107529 4719 N SHEPHERD, HOUSTONGASOLINE 11/5/93 2 , 2A E,Q* CITY OF HOUSTON107530 6001 MEMORIAL LOOP, HOUSTONGASOLINE 12/6/93 2 , 2A E,Q* CITY OF HOUSTON107532 9726 MONROE, HOUSTONGASOLINE, DIESEL 10/27/93 2 , 2A E,Q* CITY OF HOUSTON107536 2050 FUEL STORAGE RD, HOUSTONWASTE OIL, OTHER 12/3/93 2 , 2A E,Q* CITY OF HOUSTON107558 1602 SEAMIST, HOUSTONGASOLINE, DIESEL 12/8/93 2 , 2A E,Q* CITY OF HOUSTON107578 5708 EASTEX FWY, HOUSTONGASOLINE 12/17/93 2 , 2A E,Q* CITY OF HOUSTON107664 7718 B AIRPORT BLVD, HOUSTONGASOLINE 1/7/94 2 , 2A E,QCITY OF HOUSTON 107692 3203 W DAIRY ASHFORD, HOUSTONGASOLINE 11/8/94 2 , 2A E,QCITY OF HOUSTON 107732 6000 TEAGUE, HOUSTONGASOLINE 1/19/94 2 , 2A E,Q* CITY OF HOUSTON108401 8430 NEWCASTLE, HOUSTONDIESEL, WASTE OIL 4/1/94 2 , 2A E,Q* CITY OF HOUSTON108460 7111 DIXIE DR, HOUSTONDIESEL, GASOLINE 11/16/93 2 , 2A E,Q* CITY OF HOUSTON108461 6902 NAVIGATION, HOUSTONGASOLINE 11/29/93 2 , 2A E,Q* CITY OF HOUSTON108462 803 ENNIS, HOUSTONGASOLINE 4/20/94 2 , 2A E,QCITY OF HOUSTON 108516 18410 LEE RD, HOUSTONGASOLINE 7/7/94 2 , 2A E,Q* CITY OF HOUSTON110756 1700 E CROSSTIMBERS, HOUSTONUNKNOWN 4/5/96 2 , 2A E,Q* CITY OF HOUSTON111117 3902 SCOTT, HOUSTONUNKNOWN 6/14/96 2 , 2A E,Q* CITY OF HOUSTON D PUBLIC WORKS112469 1569 RICHMOND AVE, HOUSTONGASOLINE 8/1/95 1B , 1A E,QCITY OF HOUSTON PUBLIC WORKS 106767 6360 FAIRDALE, HOUSTONGASOLINE, DIESEL 2/11/93 2 , 2A E,Q* CITY OF HOUSTON PUBLIC WORKS107582 5900 TEAGUE, HOUSTONGASOLINE, DIESEL 12/1/93 2 , 2A E,Q* CITY OF HOUSTON PUBLIC WORKS107621 3102 MCKAUGHAN, HOUSTONGASOLINE 12/27/93 2 , 2A E,QCOASTAL MAVERICK 097516 6512 S RICE, BELLAIREGASOLINE 12/13/90 2 , 2A E,QCOCA COLA BOTTLING CO 096452 9300 S CENTERPOINT, HOUSTONGASOLINE 7/19/90 2 , 6 E,QCOCA COLA ENTERPRISES INC 092222 2800 BISSONNET, HOUSTONGASOLINE 10/3/88 2 , 5 E,QCOCA COLA ENTERPRISES INC 095675 9300 S CENTER POINT, HOUSTONGASOLINE 5/8/90 2 , 2A E,QCON-WAY SW/NAT. WAREHOUSE INVS 099703 1235 GAZIN, HOUSTONGASOLINE, DIESEL, WASTE OIL 7/3/91 2 , 2A E,QCONOCO 091949 1103 W MAIN, LA PORTEGASOLINE 5/15/88 2 , 2A E,QCONOCO INC 106820 9502 KEMPWOOD DR, HOUSTONGASOLINE 6/11/93 2 , 2A E,QCONOCO INC 107372 1432 E FM 1960, HUMBLEGASOLINE 10/14/93 2 , 6 E,QCONOCO, INC. 092750 95 E CROSSTIMBERS, HOUSTONUNKNOWN 2/1/89 2 , 2A E,QCONOCO, INC. 095988 3411 FM 1960, HUMBLEGASOLINE 6/1/90 2 , 2A E,QCONOCO, INC. 096630 5300 KIRBY DR, HOUSTONGASOLINE 4/27/90 2 , 2A E,QCONOCO, INC. 104023 12699 MEMORIAL, HOUSTONGASOLINE 1/24/92 2 , 4 E,QCONOCO, INC. 111623 5210 BUFFALO SPEEDWAY, HOUSTONUNKNOWN 8/28/96 2 , 2A E,QCONSOLIDATED CONVOY 091464 3901 TRAIL MOBILE DR, HOUSTONDIESEL 9/3/87 2 , 2A E,QCONSOLIDATED FREIGHTWAYS 095134 4847 BLAFFER, HOUSTONDIESEL 3/19/90 2 , 2A E,QCONTINENTAL AIRLINES INC 093558 3500 N TERMINAL RD, HOUSTONUNKNOWN 8/29/89 2 , 2A E,QCONTINENTAL AIRLINES INC 098169 8426 TRAVELAIR, HOUSTONWASTE OIL, OTHER 3/6/91 2 , 2A E,Q* CONTINENTAL AIRLINES INC111708 4411 WRIGHT RD, HOUSTONWASTE OIL 7/15/96 1B , 1A E,QTNRCC - 82

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPST* COURTAULDS COATINGS INC106352 6001 ANTOINE DR, HOUSTONUNKNOWN 10/7/92 2 , 2A E,QCOURTHOUSE GARAGE LTD 107942 119 FANNIN ST, HOUSTONGASOLINE 7/7/93 2 , 6 E,QCRAGWOOD GROUP III LTD 092012 13131 ALMEDA, HOUSTONGASOLINE 4/17/86 2 , 5 E,QCROW FLITE SALES 107250 7002 W MONTGOMERY, HOUSTONGASOLINE 9/20/93 2 , 2A E,QCROW HOUSTON ASSOCIATES #1 111148 447 W 38TH ST, HOUSTONGASOLINE 6/17/96 2 , 2A E,QCUBECO 099139 1415 HARRIS, HOUSTONGASOLINE, DIESEL 2/28/91 2A , 6 E,QCULLENS CENTER BANK & TRUST 106346 5885 S GESSNER, HOUSTONGASOLINE 6/3/92 1B , 1A E,QCULLINS ROBERT 098409 4815 CLINTON, HOUSTONGASOLINE 2/19/91 2 , 4 E,QCUZ N LAWS 095716 3510 LEELAND, HOUSTONGASOLINE 4/18/90 2 , 6 E,QCX TRANSPORTATION-TIC UNITED 100349 4706 FIDELITY, HOUSTONGASOLINE 9/30/91 2 , 6 E,Q* CYPRESS-FAIRBANKS ISD109081 11010 TELGE RD, HOUSTONGASOLINE 1/24/95 2 , 2A E,QDEERWOOD COUNTRY CLUB 108260 1717 FOREST GARDEN, KINGWOODGASOLINE 6/13/94 2 , 3 E,QDELTA AIR LINES INC 093676 4661 WRIGHT RD, HOUSTONGASOLINE 9/5/89 2 , 2A E,Q* DENNIS JOSLIN111268 1209 WACO ST, HOUSTONGASOLINE, WASTE OIL 7/1/96 2 , 2A E,QDIAMOND SHAMROCK 091791 4040 BOONE RD, HOUSTONGASOLINE 4/5/88 2 , 4 E,QDIAMOND SHAMROCK 092189 9365 S MAIN ST, HOUSTONGASOLINE 1/21/85 2A , 6 E,QDIAMOND SHAMROCK 092768 10141 ALMEDA GENOA RD, HOUSTONGASOLINE 3/24/89 2A , 6 E,QDIAMOND SHAMROCK 096084 2203 N GESSNER, HOUSTONGASOLINE 5/30/90 2 , 6 E,QDIAMOND SHAMROCK 098171 12665 STUEBNER AIRLINE RD, HOUSTONGASOLINE 2/25/91 2 , 2A E,QDIAMOND SHAMROCK 098518 504 S RICHEY, PASADENAGASOLINE 9/27/90 2 , 2A E,QDIAMOND SHAMROCK 099168 10096 VETERANS MEMORIAL RD, HOUSTONGASOLINE 2/28/91 2 , 2A E,QDIAMOND SHAMROCK 100654 14710 STERLING GREEN, CHANNELVIEWGASOLINE 10/24/91 2 , 3 E,QDIAMOND SHAMROCK 104072 6333 SAN FELIPE, HOUSTONGASOLINE 7/31/92 2 , 2A E,Q* DIAMOND SHAMROCK104515 6100 W LITTLE YORK, HOUSTONGASOLINE 8/24/92 2 , 2A E,QDIAMOND SHAMROCK 104750 6450 W 43RD, HOUSTONGASOLINE 3/19/92 2A , 6 E,Q* DIAMOND SHAMROCK106579 6130 PINEMONT, HOUSTONGASOLINE 4/23/93 2 , 2A E,QDIAMOND SHAMROCK 108719 16141 MARKET ST, CHANNELVIEWGASOLINE 10/3/94 2 , 5 E,Q* DIAMOND SHAMROCK108801 3770 S GESSNER, HOUSTONGASOLINE 11/2/94 2 , 2A E,Q* DIAMOND SHAMROCK109713 1816 SHEPHERD, HOUSTONGASOLINE 7/19/95 2 , 2A E,QDIAMOND SHAMROCK 110375 5585 WESLAYAN, HOUSTONGASOLINE 3/27/95 2 , 2A E,Q* DIAMOND SHAMROCK110459 8650 C E KING PKWY, HOUSTONUNKNOWN 3/5/96 2 , 2A E,QDIAMOND SHAMROCK 111436 540 SHELDON RD, CHANNELVIEWGASOLINE 8/1/96 2 , 2A E,Q* DIAMOND SHAMROCK111517 5902 GULFTON, HOUSTONGASOLINE 8/15/96 2 , 2A E,Q* DIAMOND SHAMROCK111643 2850 WILCREST RD, HOUSTONGASOLINE 7/30/96 2 , 2A E,Q* DIAMOND SHAMROCK111926 347 W FM 1960, HOUSTONGASOLINE 11/15/96 2 , 2A E,Q* DIAMOND SHAMROCK111958 6810 LONG DR, HOUSTONUNKNOWN 12/4/96 2 , 2A E,Q* DIAMOND SHAMROCK111981 703 NORMANDY, HOUSTONGASOLINE 8/1/96 2 , 2A E,Q* DIAMOND SHAMROCK112010 9091 S GESSNER, HOUSTONGASOLINE 11/19/96 2 , 2A E,QDIAMOND SHAMROCK 112012 4010 SYNOTT, HOUSTONGASOLINE 11/20/96 2 , 2A E,Q* DIAMOND SHAMROCK112067 10555 WILCREST, HOUSTONGASOLINE 11/19/96 2 , 2A E,Q* DIAMOND SHAMROCK112481 10900 MYKAWA, HOUSTONGASOLINE, DIESEL 11/21/96 1B , 1A E,QDIAMOND SHAMROCK REF & MKTG 104445 7702 BELLAIRE BLVD, HOUSTONGASOLINE 2/28/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091017 6000 ANTOINE DR, HOUSTONGASOLINE 8/31/84 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091157 10802 WESTHEIMER BLVD, HOUSTONUNKNOWN 1/1/85 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091207 2230 WIRT, HOUSTONUNKNOWN 1/16/87 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 091226 612 CENTER ST, DEER PARKGASOLINE 1/19/87 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091297 4615 SAN JACINTO, HOUSTONGASOLINE 4/24/87 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 091330 5720 BELLAIRE BLVD, HOUSTONUNKNOWN 1/1/85 2A , 6 E,QTNRCC - 83

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTDIAMOND SHAMROCK REF & MKTG CO 091654 7802 BELLFORT, HOUSTONGASOLINE 6/30/87 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 091757 5902 SPENCER RD, PASADENAGASOLINE 3/17/88 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 091951 7501 WESTHEIMER, HOUSTONGASOLINE 4/26/88 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091952 4101 BELLAIRE, HOUSTONGASOLINE 5/3/88 2 , 4 E,Q* DIAMOND SHAMROCK REF & MKTG CO092058 3820 PINEMONT ST, HOUSTONGASOLINE 7/29/88 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO092240 5344 ANTOINE, HOUSTONGASOLINE 2/25/88 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 092551 10030 BISSONNET, HOUSTONGASOLINE 1/20/89 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 092631 5726 FONDREN, HOUSTONGASOLINE 2/13/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 092777 2219 HWY 201, BAYTOWNGASOLINE 1/31/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 093111 8430 STELLA LINK, HOUSTONGASOLINE 6/2/89 2 , 3 E,QDIAMOND SHAMROCK REF & MKTG CO 093684 7227 JENSEN DR, HOUSTONGASOLINE 9/26/89 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 094084 929 FEDERAL, HOUSTONGASOLINE 11/15/89 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 094091 11501 NORTHWEST FWY, HOUSTONGASOLINE 11/21/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 094693 10330 CHAMPION FOREST, HOUSTONGASOLINE 1/11/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 094929 5115 N MCCARTY DR, HOUSTONGASOLINE 1/18/90 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 095157 3949 BELLAIRE, HOUSTONGASOLINE 1/2/90 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO095230 6225 BEECHNUT RD, HOUSTONGASOLINE 2/21/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 096092 10110 TELEPHONE RD, HOUSTONGASOLINE 5/21/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 096585 8517 HEMPSTEAD, HOUSTONGASOLINE 12/7/89 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 096662 2443 LITTLE YORK, HOUSTONGASOLINE 9/5/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 096686 6125 CHIMNEY ROCK, HOUSTONGASOLINE 7/15/90 2 , 3 E,Q* DIAMOND SHAMROCK REF & MKTG CO097124 16303 BELLAIRE BLVD, HOUSTONGASOLINE 10/31/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 097359 823 EDGEBROOK, HOUSTONGASOLINE 11/13/90 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 097752 4295 BRITTMORE RD, HOUSTONGASOLINE 1/10/91 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 097800 11190 BEECHNUT, HOUSTONGASOLINE 1/9/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 099024 1339 WESTHEIMER RD, HOUSTONGASOLINE 5/15/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 099102 28531 TOMBALL PKWY, TOMBALLGASOLINE 5/15/91 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099228 12155 ALIEF CLODINE, HOUSTONGASOLINE 12/20/90 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 099446 11419 W HARDY, HOUSTONGASOLINE 7/5/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 099779 4310 OLD SPANISH TRL, HOUSTONGASOLINE 8/6/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 100536 202 CAVALCADE, HOUSTONGASOLINE 10/10/91 2 , 3 E,Q* DIAMOND SHAMROCK REF & MKTG CO101873 2222 PARKER, HOUSTONGASOLINE 3/22/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 104050 2404 BAY AREA BLVD, HOUSTONGASOLINE 7/27/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 104161 1111 SILBER RD, HOUSTONGASOLINE 1/19/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 106998 8117 LONG POINT, HOUSTONGASOLINE 4/2/93 2A , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 107036 1602 S HWY 6, HOUSTONGASOLINE 8/3/93 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO107124 4401 RED BLUFF RD, DEER PARKGASOLINE 8/11/93 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO107272 605 E TEXAS AVE, BAYTOWNGASOLINE 9/20/93 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 107953 920 ALMEDA GENOA, HOUSTONGASOLINE 3/16/94 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO108392 4203 ALDINE MAIL RT, HOUSTONGASOLINE 7/13/94 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO108705 14856 STUEBNER AIRLINE RD, HOUSTONGASOLINE 10/10/94 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 108743 7725 W FM 1960, HUMBLEGASOLINE 8/14/94 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 108857 5247 ALDINE MAIL ROUTE, HOUSTONGASOLINE 11/23/94 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO109127 213 1ST ST, HUMBLEGASOLINE 12/20/94 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109839 901 BUNKER HILL, HOUSTONGASOLINE 8/1/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109959 11319 JONES RD, HOUSTONGASOLINE 10/13/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 110917 510 FREEPORT ST, HOUSTONGASOLINE 9/27/95 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO111149 9342 WESTVIEW, HOUSTONUNKNOWN 6/12/96 2 , 2A E,QTNRCC - 84

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTDIAMOND SHAMROCK REF. & MKTG 102059 1701 N MAIN, BAYTOWNGASOLINE 3/4/92 2A , 6 E,Q* DIAMOND SHAMROCK REF. & MKTG108959 305 TUAM, HOUSTONGASOLINE 12/21/94 2 , 2A E,QDOTTIE LARKIN 109574 LA PORTE, HOUSTONGASOLINE 4/7/95 2A , 1A E,QDOTTIE LARKIN 109991 LAPORTE RD, HOUSTONGASOLINE 10/26/95 2A , 1A E,QDRAVO BASIC MATERIALS 108785 1686 BRITTMORE, HOUSTONGASOLINE, DIESEL 10/19/94 2A , 1A E,QDRESSER RAND 096649 1210 W SAM HOUSTON PKWY, HOUSTONDIESEL 9/4/90 2 , 2A E,Q* E L LESTER CO107923 7455 CULLEN, HOUSTONGASOLINE 3/9/94 2 , 2A E,Q* E T TEXACO SERVICE STATION112625 1049 N SHEPHERD, HOUSTONGASOLINE 6/1/97 1B , 1A E,QE Z SERVE CONVENIENCE STORES 111679 9702 STUEBNER AIRLINE, HOUSTONGASOLINE 9/12/96 2 , 2A E,QE Z SERVE INC 111715 9922 N IH 45, HOUSTONGASOLINE, DIESEL 9/9/96 2 , 2A E,QE Z SERVE PETRO MARKETING CO. 096404 13114 ALMEDA, HOUSTONGASOLINE 7/9/90 2 , 2A E,QEASTEX INC (UNITED INNS, INC.) 101227 4862 BEECHNUT, HOUSTONUNKNOWN 3/5/91 2 , 2A E,Q* EASTEX INN106822 7585 BELLAIRE BLVD, HOUSTONGASOLINE 6/9/93 2 , 2A E,QEDDY REFINING 099993 SERGEANT M GARCIA BLVD, HOUSTONGASOLINE 8/26/91 2 , 6 E,QEDGEMONT REALITY 091235 5720 CLAREWOOD, HOUSTONGASOLINE 2/12/87 2 , 2A E,Q* EL DORADO GOLF CLUB INC105523 7900 N BELT DR, HUMBLEGASOLINE, DIESEL 11/25/92 2 , 2A E,QEL HAKAM BAKRI MIDDLE E 102893 11827 CHIMNEY ROCK, HOUSTONGASOLINE 12/18/91 2 , 2A E,QENTERPRISE LEASING 100036 9203 N IH--45, HOUSTONGASOLINE 8/28/91 2 , 2A E,QENTEX INC 094347 4615 NAVIGATION, HOUSTONWASTE OIL 11/17/89 2A , 2A E,Q* ENTEX INC107463 12330 BELLAIRE BLVD, HOUSTONGASOLINE 11/15/93 2 , 2A E,QESTATE JACK & MARGARD GILBERT 102587 5010 TERMINAL ST, BELLAIREGASOLINE 7/18/91 2A , 6 E,Q* ESTATE OF GLEN PEARLS CHILDREN110167 12708 HEMPSTEAD HWY, HOUSTONGASOLINE 12/8/95 2 , 2A E,Q* EUGENE HOEPFL111247 4610 N SHEPHERD, HOUSTONUNKNOWN 6/19/96 2 , 2A E,QEVANS OIL CO 105146 422 W NASA RD 1, WEBSTERGASOLINE 2/5/92 2 , 6 E,Q* EVANS SYSTEMS108616 4209 W COLUMBIA HWY, BAY CITYDIESEL 9/1/94 2A , 1A E,QEVANS SYSTEMS, INC. 096772 8450 ALMEDA GENOA, HOUSTONGASOLINE 8/31/90 2 , 2A E,QEXXON COMPANY USA 091038 8015 EAST FWY, HOUSTONGASOLINE 8/12/85 2 , 4 E,QEXXON COMPANY USA 091100 7470 BELLFORT DR, HOUSTONGASOLINE 7/29/86 2A , 6 E,QEXXON COMPANY USA 091299 2405 BAY AREA, CLEAR LAKEGASOLINE 5/10/87 2 , 4 E,QEXXON COMPANY USA 091347 13350 ALMEDA, HOUSTONGASOLINE 6/12/87 2 , 4 E,QEXXON COMPANY USA 091489 2521 S POST OAK, HOUSTONGASOLINE 10/9/87 2 , 6 E,QEXXON COMPANY USA 091498 8002 KIRBY DR, HOUSTONGASOLINE 4/27/87 2 , 4 E,QEXXON COMPANY USA 091524 9670 WESTHEIMER RD, HOUSTONGASOLINE 11/1/87 2 , 4 E,QEXXON COMPANY USA 091550 4651 SPENCER HWY, PASADENAGASOLINE 11/30/87 2A , 6 E,QEXXON COMPANY USA 091573 10010 LAPORTE FWY, HOUSTONGASOLINE 12/15/87 2 , 4 E,QEXXON COMPANY USA 091574 4450 W FM 1960, HOUSTONGASOLINE 12/15/87 2 , 2A E,QEXXON COMPANY USA 091576 5302 W BELLFORT, HOUSTONGASOLINE 12/15/87 2 , 2A E,QEXXON COMPANY USA 091579 13211 MEMORIAL DR, HOUSTONGASOLINE 12/19/87 2 , 6 E,QEXXON COMPANY USA 091696 9998 HEMPSTEAD HWY, HOUSTONGASOLINE 2/1/88 2 , 4 E,Q* EXXON COMPANY USA091878 10801 EASTEX FWY, HOUSTONGASOLINE 5/9/88 2 , 2A E,QEXXON COMPANY USA 092002 7102 BEECHNUT, HOUSTONGASOLINE 6/28/88 2 , 2A E,QEXXON COMPANY USA 092083 1 W TEXAS AVE, BAYTOWNGASOLINE 6/2/88 2 , 6 E,QEXXON COMPANY USA 092182 2211 NORTH FWY, HOUSTONGASOLINE 1/1/88 2 , 4 E,QEXXON COMPANY USA 092183 2424 OLD SPANISH TRL, HOUSTONGASOLINE 8/3/88 2 , 4 E,QEXXON COMPANY USA 092186 7699 KATY FWY, HOUSTONGASOLINE 6/17/88 2 , 2A E,QEXXON COMPANY USA 092355 12303 EASTEX FWY, HOUSTONGASOLINE 11/26/88 2 , 2A E,QEXXON COMPANY USA 092395 1220 N WAYSIDE, HOUSTONGASOLINE 10/1/88 2 , 4 E,QEXXON COMPANY USA 092397 3144 SOUTHMORE, HOUSTONGASOLINE 10/1/88 2 , 4 E,QTNRCC - 85

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTEXXON COMPANY USA 092398 7101 HARRISBURG, HOUSTONGASOLINE 2/25/88 2 , 4 E,QEXXON COMPANY USA 092497 7002 GULF FWY, HOUSTONGASOLINE 1/7/89 2 , 4 E,QEXXON COMPANY USA 092570 12988 MARKET ST, HOUSTONGASOLINE 2/8/89 2 , 4 E,QEXXON COMPANY USA 092687 8588 LONG POINT RD, HOUSTONGASOLINE 12/22/88 2 , 2A E,QEXXON COMPANY USA 092825 4423 SAN FELIPE, HOUSTONGASOLINE 12/1/87 2 , 6 E,QEXXON COMPANY USA 092859 3209 N SHEPHERD DR, HOUSTONUNKNOWN 3/23/89 2 , 4 E,QEXXON COMPANY USA 093019 7618 BELLAIRE, HOUSTONGASOLINE 5/16/89 2 , 4 E,QEXXON COMPANY USA 093148 224 N MAIN ST, HIGHLANDSGASOLINE 6/15/89 2 , 2A E,QEXXON COMPANY USA 093201 5706 WESTHEIMER, HOUSTONGASOLINE 6/16/89 2 , 6 E,QEXXON COMPANY USA 093305 4255 HWY 6, HOUSTONGASOLINE 7/10/89 2 , 2A E,QEXXON COMPANY USA 093343 8520 MESA RD, HOUSTONGASOLINE 7/24/89 2 , 2A E,QEXXON COMPANY USA 093528 11038 WESTHEIMER, HOUSTONGASOLINE 8/21/89 2 , 4 E,QEXXON COMPANY USA 093585 17725 JFK BLVD, HOUSTONJET FUEL 9/15/89 2 , 2A E,QEXXON COMPANY USA 093620 7006 N HWY 6, HOUSTONGASOLINE 9/12/89 2 , 6 E,QEXXON COMPANY USA 093775 835 GESSNER, HOUSTONGASOLINE 10/5/89 2 , 4 E,QEXXON COMPANY USA 094320 9605 STELLA LINK, HOUSTONGASOLINE 12/19/89 2 , 4 E,QEXXON COMPANY USA 094697 1090 KINGWOOD DR, KINGWOODGASOLINE 1/11/90 2 , 6 E,QEXXON COMPANY USA 095329 9278 N HWY 59, HOUSTONWASTE OIL 4/6/90 2 , 4 E,QEXXON COMPANY USA 095524 950 PASADENA FWY, PASADENAGASOLINE 4/18/90 2 , 2A E,QEXXON COMPANY USA 095583 8903 WESTHEIMER, HOUSTONGASOLINE 5/2/90 2 , 2A E,QEXXON COMPANY USA 096478 5216 RICHMOND AVE, HOUSTONGASOLINE 8/13/90 2 , 4 E,QEXXON COMPANY USA 097111 7702 EASTEX FWY, HOUSTONGASOLINE 10/24/90 2 , 2A E,QEXXON COMPANY USA 097143 9670 WESTHEIMER, HOUSTONGASOLINE 11/6/90 2A , 1A E,QEXXON COMPANY USA 097971 12697 BISSONNET AVE, HOUSTONGASOLINE 2/8/91 2 , 4 E,QEXXON COMPANY USA 098036 5138 SAN FELIPE, HOUSTONGASOLINE 8/1/90 2 , 2A E,QEXXON COMPANY USA 098091 5618 AVE B, CROSBYGASOLINE 2/22/91 2 , 4 E,QEXXON COMPANY USA 098681 10521 GULF FWY, HOUSTONGASOLINE 4/15/91 2 , 6 E,QEXXON COMPANY USA 098800 101 S ALEXANDER, BAYTOWNGASOLINE 4/22/91 2 , 6 E,QEXXON COMPANY USA 098962 201 CRAWFORD, HOUSTONGASOLINE 11/19/90 2A , 6 E,QEXXON COMPANY USA 098968 10831 BISSONNET, HOUSTONGASOLINE 10/15/90 2 , 4 E,QEXXON COMPANY USA 099016 12355 KATY FWY, HOUSTONGASOLINE 1/16/91 2 , 2A E,QEXXON COMPANY USA 099417 7050 SOUTHWEST FWY, HOUSTONGASOLINE 4/12/91 2 , 6 E,QEXXON COMPANY USA 099546 2800 DECKER DR, BAYTOWNGASOLINE, DIESEL 5/13/91 2 , 5 E,QEXXON COMPANY USA 099659 14101 HWY 290, HOUSTONGASOLINE 9/27/90 2 , 2A E,QEXXON COMPANY USA 099960 6802 KIRBY DR, HOUSTONGASOLINE 1/10/91 2 , 6 E,QEXXON COMPANY USA 100159 14602 MEMORIAL DR, HOUSTONGASOLINE 5/10/91 2 , 2A E,Q* EXXON COMPANY USA100800 2525 S SHEPHERD, HOUSTONGASOLINE 11/4/91 2 , 2A E,QEXXON COMPANY USA 101846 7202 BISSONNET RD, HOUSTONGASOLINE 10/7/91 2 , 2A E,QEXXON COMPANY USA 104760 5601 SOUTHWEST FWY, HOUSTONGASOLINE 10/11/91 2 , 2A E,QEXXON COMPANY USA 105866 1401 WIRT RD, HOUSTONGASOLINE 12/30/92 2 , 2A E,QEXXON COMPANY USA 106656 3139 DECKER DR, BAYTOWNUNKNOWN 12/30/92 2A , 6 E,Q* EXXON COMPANY USA106744 9600 FONDREN, HOUSTONGASOLINE 3/26/93 2A , 1A E,QEXXON COMPANY USA 107533 1315 BLALOCK, HOUSTONGASOLINE 10/27/93 2 , 6 E,Q* EXXON COMPANY USA107828 13643 HWY 249, HOUSTONGASOLINE 12/15/92 2 , 2A E,Q* EXXON COMPANY USA107926 12602 E IH-10, HOUSTONGASOLINE 10/22/93 2 , 2A E,Q* EXXON COMPANY USA107929 16750 EL CAMINO RD, HOUSTONGASOLINE 12/22/93 2 , 2A E,Q* EXXON COMPANY USA108012 8819 KATY FWY, HOUSTONGASOLINE 4/4/94 2 , 2A E,Q* EXXON COMPANY USA108657 738 LATHROP, HOUSTONGASOLINE 5/5/94 2A , 1A E,QTNRCC - 86

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPST* EXXON COMPANY USA108742 3102 BUFFALO SPEEDWAY, HOUSTONGASOLINE, DIESEL 10/14/94 2 , 2A E,Q* EXXON COMPANY USA109698 3423 KATY FWY, HOUSTONGASOLINE 6/19/95 2 , 2A E,QEXXON COMPANY USA 109876 6012 E IH-10, BAYTOWNGASOLINE 1/29/95 2 , 6 E,QEXXON COMPANY USA 110050 14760 WALLISVILLE, HOUSTONUNKNOWN 10/24/95 2 , 2A E,Q* EXXON COMPANY USA110541 3924 BELLAIRE BLVD, HOUSTONUNKNOWN 3/19/96 2 , 2A E,Q* EXXON COMPANY USA110749 9322 BISSONNET, HOUSTONGASOLINE 3/6/96 2 , 2A E,Q* EXXON COMPANY USA110754 21334 NORTH FWY, HOUSTONUNKNOWN 4/5/96 2 , 2A E,Q* EXXON COMPANY USA110789 9425 MESA DR, HOUSTONGASOLINE 4/1/96 2 , 2A E,Q* EXXON COMPANY USA110806 5805 PINEMONT, HOUSTONGASOLINE 4/1/96 2 , 2A E,QEXXON COMPANY USA 110914 5402 NORTH FWY, HUMBLEGASOLINE 4/17/96 2 , 2A E,QEXXON COMPANY USA 110932 6001 HILLCROFT, HOUSTONGASOLINE 5/1/96 2 , 6 E,Q* EXXON COMPANY USA110937 8604 SOUTHWEST FWY, HOUSTONGASOLINE 4/1/96 2 , 2A E,QEXXON COMPANY USA 110939 2401 GARTH RD, BAYTOWNGASOLINE 4/9/96 2 , 2A E,Q* EXXON COMPANY USA110940 518 PARK ST, BAYTOWNGASOLINE 4/10/96 1B , 1A E,QEXXON COMPANY USA 111016 8275 LOUETTA, SPRINGWASTE OIL 5/6/96 2 , 6 E,QEXXON COMPANY USA 111062 8234 BROADWAY, HOUSTONGASOLINE 4/10/96 1B , 1A E,Q* EXXON COMPANY USA111093 1002 GESSNER, HOUSTONGASOLINE 4/30/96 2 , 2A E,Q* EXXON COMPANY USA111095 12590 WESTHEIMER, HOUSTONGASOLINE 5/16/96 2 , 2A E,Q* EXXON COMPANY USA111097 3140 SOUTHWEST FWY, HOUSTONGASOLINE 5/24/96 2 , 2A E,Q* EXXON COMPANY USA111137 8525 GULF FWY, HOUSTONGASOLINE 6/3/96 2 , 2A E,Q* EXXON COMPANY USA111139 6015 LONG, HOUSTONGASOLINE 5/31/96 2 , 2A E,Q* EXXON COMPANY USA111152 3902 S SHAVER, PASADENAGASOLINE 6/4/96 2 , 2A E,Q* EXXON COMPANY USA111177 3903 SAN FELIPE, HOUSTONGASOLINE 5/23/96 2 , 2A E,Q* EXXON COMPANY USA111196 2416 MAGNUM, HOUSTONUNKNOWN 10/29/96 2 , 2A E,Q* EXXON COMPANY USA111197 1622 W 18TH ST, HOUSTONUNKNOWN 6/17/96 2 , 2A E,Q* EXXON COMPANY USA111212 3003 ELLA BLVD, HOUSTONUNKNOWN 6/17/96 2 , 2A E,Q* EXXON COMPANY USA111213 7101 TIDWELL, HOUSTONGASOLINE 6/11/96 2 , 2A E,Q* EXXON COMPANY USA111214 16803 STUEBNER AIRLINE, HOUSTONGASOLINE 6/11/96 2 , 2A E,Q* EXXON COMPANY USA111226 11402 NORTH FWY, HOUSTONWASTE OIL 5/9/97 2 , 2A E,Q* EXXON COMPANY USA111341 3807 MONTROSE, HOUSTONUNKNOWN 7/31/96 2 , 2A E,Q* EXXON COMPANY USA111382 102 CAVALCADE, HOUSTONGASOLINE 7/9/96 2 , 2A E,Q* EXXON COMPANY USA111591 6901 NAVIGATION, HOUSTONUNKNOWN 9/11/96 2 , 2A E,Q* EXXON COMPANY USA111732 8037 MARTIN LUTHER KING BLVD, HOUSTONGASOLINE 5/21/96 2 , 2A E,QEXXON COMPANY USA 111755 2203 HWY 90, CROSBYGASOLINE 6/5/96 1B , 1A E,Q* EXXON COMPANY USA112093 5710 MEMORIAL, HOUSTONGASOLINE 1/14/97 2 , 2A E,Q* EXXON COMPANY USA112267 6166 WESTHEIMER, HOUSTONUNKNOWN 4/25/97 1B , 1A E,QFDIC 093984 5611 SPENCER HWY, PASADENAGASOLINE 10/30/89 2 , 6 E,QFDIC 098098 812 SHELDON RD, CHANNELVIEWWASTE OIL, CHEMICAL 2/27/91 2 , 2A E,QFDIC 107178 440 LOUISIANA, HOUSTONUNKNOWN 2/21/92 5B , 2A E,QFEATHER CRAFT LAND CORP 106129 16801 FEATHER CRAFT LN, HOUSTONGASOLINE, WASTE OIL 2/15/93 2 , 2A E,QFIESTA MART INC 096407 6200 BELLAIRE BLVD, HOUSTONGASOLINE 7/17/90 2 , 4 E,QFIESTA MART INC 099731 5600 MYKAWA, HOUSTONGASOLINE 5/20/91 2 , 6 E,Q* FIESTA MART INC104224 4711 AIRLINE DR, HOUSTONGASOLINE 7/1/92 2 , 2A E,QFIESTA MART INC 104225 12200 EAST FWY, HOUSTONGASOLINE 6/30/92 2 , 2A E,QFIESTA MART INC 108609 2323 WIRT RD, HOUSTONGASOLINE, DIESEL 9/14/94 2 , 2A E,QFIESTA MART INC 109139 2807 N SHEPHERD, HOUSTONGASOLINE 2/15/95 2 , 2A E,QFIRST HEIGHTS BANK 109055 5341 AIRLINE DR, HOUSTONGASOLINE 7/21/94 2A , 6 E,QFIRST INTERSTATE BANK 101554 4010 S BRAESWOOD, HOUSTONGASOLINE, DIESEL, WASTE OIL 1/6/92 2 , 2A E,QTNRCC - 87

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTFIRST SOUTHEAST CORP 095224 3603 S SHEPHERD, HOUSTONGASOLINE 3/5/90 2 , 2A E,QFORD LEASING DEVELOPMENT CO. 099572 4410 WESTHEIMER RD, HOUSTONWASTE OIL 1/10/91 2 , 6 E,Q* FRANK MELCHER110903 4132 WILLOWBEND, HOUSTONUNKNOWN 7/19/96 2 , 2A E,QFRITO-LAY INC 094349 2222 CENTRAL, HOUSTONGASOLINE 12/14/89 2 , 2A E,QG & C PROPERTIES CORPORATION 095331 642 W GULF BANK, HOUSTONGASOLINE 3/16/90 2A , 2A E,QGARDNER CONSTRUCTION CO 104604 10150 OLD KATY RD, HOUSTONGASOLINE 9/11/92 2 , 6 E,QGASKEY CONSTRUCTION CORP 091919 8807 LIBERTY RD, HOUSTONGASOLINE 5/18/88 2 , 2A E,QGENERAL RENT A CAR 096405 7718 AIRPORT BLVD, HOUSTONGASOLINE 7/11/90 2 , 4 E,QGENERAL STEVEDORES INC 110213 6107 INDUSTRIAL WAY, HOUSTONGASOLINE 12/26/95 2 , 2A E,Q* GEORGE COTTINGHAM107691 9801 STELLA LINK, HOUSTONGASOLINE 1/14/94 2 , 2A E,Q* GEORGE QUANG NGUYEN108603 8899 E NORTH LOOP, HOUSTONGASOLINE 9/12/94 2 , 2A E,Q* GERRIE APOLONIA112119 900 STUDEWOOD, HOUSTONUNKNOWN 2/13/97 5B , 1A E,QGERRIE GERALD 091924 3209 HWY 146, BAYTOWNGASOLINE 5/11/88 5B , 2A E,QGLAZIER FOODS COMPANY 099431 1500 OLIVER, HOUSTONGASOLINE, DIESEL 6/12/91 1B , 1A E,QGOODSON HONDA 095219 9702 OLD KATY RD, HOUSTONGASOLINE, WASTE OIL 2/12/90 2 , 6 E,QGOODSON IMPORTS 101321 11711 S IH-45, HOUSTONGASOLINE, WASTE OIL 11/3/91 2 , 6 E,QGRAHAM, T C 094529 3645 UNIVERSITY, WEST UNIVERSITY PLGASOLINE 1/19/90 2 , 3 E,QGREENBERG & COMPANY 102635 9703 WESTEIMER, HOUSTONGASOLINE 4/9/92 2 , 2A E,QGREYHOUND LINES INC 091440 1710 DELANO, HOUSTONDIESEL 8/24/87 2 , 2A E,QGREYHOUND LINES INC 100396 1520 FRANKLIN, HOUSTONGASOLINE, WASTE OIL 9/25/91 2 , 2A E,Q* GROCERY SUPPLY112293 1700 DECKER DR, BAYTOWNGASOLINE 5/1/97 1B , 1A E,QGROTH CORP 095035 1202 HAHLO ST, HOUSTONGASOLINE 2/20/90 2A , 6 E,Q* GTE112347 6002 BAKER RD, BAYTOWNUNKNOWN 5/29/97 2A , 1A E,QGTE SOUTHWEST INC 091306 8200 N MAIN, BAYTOWNUNKNOWN 10/6/86 2 , 5 E,Q* GULF & BASCO WAREHOUSE111692 813 MCKEE ST, HOUSTONDIESEL 10/21/96 2 , 2A E,QHANDY HARDWARE WHOLESALE INC 094801 8300 TEWANTIN DR, HOUSTONDIESEL 2/20/90 2 , 2A E,QHARRIS COUNTY 097962 1320 PRESTON, HOUSTONGASOLINE 2/7/91 2 , 2A E,QHARRIS COUNTY (ENGINEERING DEP 106438 111 ATASCOCITA RD, HUMBLEGASOLINE 3/5/93 2A , 1A E,QHARRIS COUNTY FLOOD CONTROL 101838 5301 ALMEDA GENOA, HOUSTONWASTE OIL 1/21/92 2 , 6 E,QHARRIS COUNTY MUD #102 094980 15300 FALMOUTH, HOUSTONDIESEL 11/15/89 2 , 5 E,QHARRIS COUNTY OIL CO 093436 2802 WASHINGTON AVE, HOUSTONGASOLINE 8/7/89 2 , 3 E,QHARRIS COUNTY OIL CO 094392 3325 11TH, HOUSTONGASOLINE 12/29/89 2 , 2A E,QHARRIS COUNTY OIL CO 095113 11802 HEMPSTEAD, HOUSTONGASOLINE 2/8/90 2 , 4 E,Q* HARRIS COUNTY OIL CO096856 1001 YALE ST, HOUSTONGASOLINE 9/27/90 2A , 1A E,QHARRIS COUNTY OIL CO 096991 10130 HEMPSTEAD, HOUSTONGASOLINE, DIESEL 10/19/90 2A , 1A E,QHARRIS COUNTY OIL CO 096992 5361 KATY BLVD, KATYGASOLINE 10/19/90 2 , 6 E,QHARRIS COUNTY PRCT #3 105573 15115 CLAY RD, HOUSTONUNKNOWN 8/13/92 2 , 6 E,QHARRIS COUNTY PRECINCT #2 105515 1202 GENOA RED BLUFF, HOUSTONUNKNOWN 10/4/91 2 , 2A E,QHASK C/O R T HERRIN JR 112007 3940 FONDREN, HOUSTONGASOLINE 11/21/96 2 , 2A E,Q* HAZEL SCHAUER108965 1402 OXFORD, HOUSTONGASOLINE 9/1/94 2 , 2A E,QHEE BYUN 108821 4720 WASHINGTON, HOUSTONGASOLINE 11/14/94 5B , 1A E,Q* HELMUTS MERZ-EDES INC111834 2000 N MEMORIAL WAY, HOUSTONGASOLINE 10/18/96 2 , 2A E,QHERTZ CORP 091348 5050 WRIGHT BROTHERS RD, HOUSTONGASOLINE 6/5/87 2 , 2A E,Q* HI LO AUTOMOTIVE SUPPLY112158 3408 S SHAVER, HOUSTONUNKNOWN 3/5/97 2 , 2A E,QHIRSCH & WESTHEIMER 108168 2450 HOUSTON AVE, HOUSTONGASOLINE 3/29/94 2 , 2A E,Q* HOANG NGUYEN112793 9030 MARTIN LUTHER KING BLVD, HOUSTONGASOLINE 11/5/97 1B , 1A E,QHOMETOWN OIL CO INC 091044 7120 BAYWAY DR, BAYTOWNGASOLINE 9/26/85 1B , 1A E,QHOUSTON CHRONICLE 092424 711 PRAIRIE, HOUSTONUNKNOWN 12/10/88 2 , 2A E,QTNRCC - 88

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTHOUSTON FIRE MUSEUM INC 111964 MAIN ST, HOUSTONGASOLINE, DIESEL, WASTE OIL 12/31/92 1B , 1A E,QHOUSTON ISD 093465 7700 WALLISVILLE RD, HOUSTONGASOLINE 7/27/89 2 , 2A E,QHOUSTON ISD 096584 2020 MANGUM, HOUSTONUNKNOWN 8/20/90 2 , 2A E,QHOUSTON ISD 107447 6700 WINFREE, HOUSTONGASOLINE 7/12/93 2 , 2A E,QHOUSTON LIGHTING & POWER 092021 2301 W GEARS RD, HOUSTONGASOLINE, DIESEL 7/18/88 2 , 4 E,QHOUSTON LIGHTING & POWER 092092 10010 FM 1960, HUMBLEGASOLINE 8/18/88 2 , 4 E,QHOUSTON LIGHTING & POWER 092259 4700 S SHAVER, HOUSTONGASOLINE 11/3/88 2 , 4 E,QHOUSTON LIGHTING & POWER 094945 8706 E HARDY, HOUSTONDIESEL 2/1/90 2 , 6 E,QHOUSTON LIGHTING & POWER 096748 12301 KURLAND, HOUSTONGASOLINE 9/17/90 2 , 3 E,QHOUSTON LIGHTING & POWER 097534 4500 S SHAVER, HOUSTONUNKNOWN 12/13/90 2 , 2A E,QHOUSTON LIGHTING & POWER 098181 10310 OLD KATY RD, HOUSTONCHEMICAL 5/17/88 2 , 4 E,QHOUSTON LIGHTING & POWER 106655 104 N GREENWOOD, HOUSTONUNKNOWN 8/27/92 2 , 4 E,Q* HOUSTON LIGHTING & POWER112265 4300 BISSONNET, BELLAIREHYDR FLUID 4/16/97 2 , 6 E,QHOUSTON MARINE SER BULK TERM 109573 850 LYNCHBURG, BAYTOWNDIESEL 10/24/94 2 , 2A E,Q* HOUSTON METO112777 5700 EASTEX FWY, HOUSTONGASOLINE, DIESEL 9/18/97 2A , 1A E,QHOUSTON METRO ELECTRIC 097122 611 E TIDWELL, HOUSTONGASOLINE 10/30/90 2 , 2A E,QHOUSTON PIONEER DEVELOPMENT CO 095311 4402 GARTH RD, BAYTOWNGASOLINE 9/22/90 5B , 4 E,QHSAC - WOLF CORP 099952 711 WILLIAMS ST, HOUSTONCHEMICAL 9/18/90 2A , 6 E,QHUGHES JOE D 093733 14035 INDUSTRIAL RD, HOUSTONDIESEL 9/8/89 2 , 5 E,Q* I & U WIRTHWEIN GBR109736 8800 KATY FWY, HOUSTONUNKNOWN 7/11/95 2 , 2A E,QJ & T AUTOMOTIVE 110667 9046 WESTVIEW, HOUSTONGASOLINE, WASTE OIL 3/9/96 1B , 1A E,QJ L PROLER IRON AND STEEL 103798 4401 CLINTON DR, HOUSTONDIESEL 5/5/92 2A , 6 E,QJ. A. BILLIPP COMPANY 096477 16834 TITAN, CLEAR LAKEGASOLINE 7/16/90 2A , 6 E,Q* JACK ROACH III112271 9155 NORTH FWY, HOUSTONGASOLINE 9/30/96 2 , 2A E,QJAMES POWELL (BEST AMERICAN) 092714 5417 N MCCARTY, HOUSTONGASOLINE 3/3/89 2 , 2A E,QJANNET ENTERPRISES, INC. 093510 6815 JENSEN DR, HOUSTONGASOLINE 8/8/89 2A , 6 E,QJARI A S 101565 4702 BEECHNUT, HOUSTONGASOLINE 12/12/90 2 , 2A E,QJAVAID MALIK 091621 1530 CLINTON DR, GALENA PARKGASOLINE 1/11/88 2A , 1A E,QJAY R YIM 107616 105 S HWY 146, LA PORTEGASOLINE 7/2/93 2 , 2A E,Q* JENNIFER HUYNH112467 3420 W OREM DR, HOUSTONGASOLINE 6/30/97 1B , 1A E,QJOHN H BAKER ENTERPRISE 107584 VETERANS MEMORIAL, HOUSTONGASOLINE 9/13/93 2 , 2A E,Q* JOHN JOSHI & ABRAHAM ISAC112795 9545 RICHMOND AVE, HOUSTONUNKNOWN 11/20/97 1B , 1A E,QJOHNSON CLYDE 092123 5200 KELLY ST, HOUSTONWASTE OIL 8/22/88 2A , 1A E,Q* JONES OIL CO104481 4828 N SHEPHERD, HOUSTONGASOLINE, DIESEL 8/25/92 2 , 2A E,Q* JONES OIL CO109424 303 BARRY RD, HOUSTONGASOLINE, DIESEL, WASTE OIL 4/12/95 2 , 2A E,QJUDITH WAGNER 109751 5630 N SHEPHERD, HOUSTONGASOLINE 2/15/95 1B , 1A E,Q* KENTUCKY FRIED CHICKEN107200 3201 DOWLING, HOUSTONGASOLINE 8/24/93 2 , 2A E,Q* KENTUCKY FRIED CHICKEN109156 303 W GRAY ST, HOUSTONUNKNOWN 12/6/94 2A , 1A E,QKERR MCGEE REFINING CORP 093635 2506 E KELLEY ST, HOUSTONGASOLINE, DIESEL 9/18/89 2 , 2A E,QKERR MCGEE REFINING CORP 111063 5201 S MARTIN LUTHER KING, HOUSTONGASOLINE 5/23/96 2 , 2A E,Q* KING AUTO SALES112523 9255 LONG POINT, HOUSTONUNKNOWN 8/12/97 2 , 6 E,Q* KING BISCUIT ENTERTAINERS INC110680 1606 WHITE OAK DR, HOUSTONUNKNOWN 3/25/96 2 , 2A E,QKINGS STORE 097019 7111 MARTIN LUTHER KING BLVD, HOUSTONUNKNOWN 9/12/90 2 , 2A E,Q* KLEIN SUPERMARKET107311 1200 W MAIN, TOMBALLGASOLINE 10/4/93 2 , 2A E,QKNICKERBOCKER CORP C/O AM GEN 111999 2929 ALLEN PKWY, HOUSTONGASOLINE, DIESEL, WASTE OIL 5/30/95 2 , 2A E,QKNICKERBOCKER CORPORATION 111348 905 WAUGH DR, HOUSTONGASOLINE, DIESEL 3/21/96 2 , 2A E,QKOCH INDUSTRIES INC 109106 17620 CHANUTE RD, HOUSTONJET FUEL 1/5/95 2 , 2A E,Q* LANDRYS DEVELOPMENT112466 104 KIPP, KEMAHUNKNOWN 7/17/97 2 , 6 E,QTNRCC - 89

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPST* LANE EQUIPMENT106219 2030 RICHMOND, HOUSTONDIESEL 1/8/93 2 , 5 E,Q* LANNIE CHUNG106169 1810 BAYPORT BLVD, SEABROOKWASTE OIL 2/17/93 2 , 2A E,Q* LASATER LIMITED PARTNERSHIP110068 1310 MORIN PLACE, HOUSTONGASOLINE, WASTE OIL 11/15/95 2 , 2A E,Q* LAVERNE BATTESTIN112641 2600 S RICHEY, HOUSTONGASOLINE 9/22/97 1B , 1A E,QLEE O C TERMINALS 095221 5510 ARMOUR DR, HOUSTONDIESEL 2/6/90 2 , 2A E,Q* LENA HARRISON112179 4303 SAN FELIPE, HOUSTONGASOLINE 2/1/97 2 , 2A E,QLEO JARNAGIN PONTIAC 109213 12111 KATY FWY, HOUSTONGASOLINE 11/9/94 2A , 1A E,QLEROY MELCHER 099520 9715 STELLA LINK, HOUSTONGASOLINE 2/7/91 2 , 2A E,QLIQUID ENERGY CORP 091973 7701 ALMEDA RD, HOUSTONDIESEL 6/20/88 2 , 2A E,QLUCKY STORES INC 104508 8103 FONDREN, HOUSTONGASOLINE, WASTE OIL 9/2/92 2 , 2A E,Q* LY XUAN HOANG112784 1525 ELGIN, HOUSTONGASOLINE 11/5/97 1B , 1A E,QM C MANAGEMENT 109031 4643 BEECHNUT, HOUSTONGASOLINE 11/28/94 2A , 1A E,Q* M.B. & SONS, INC.107058 817 SHELDON RD, CHANNELVIEWDIESEL, GASOLINE 7/30/93 2 , 2A E,QMACGREGOR DENTAL CENTERS 107330 8470 GULF FWY, HOUSTONGASOLINE 9/13/93 2 , 2A E,QMAPCO PETROLEUM INC 109993 1901 THOMPSON RD, BAYTOWNDIESEL 10/31/95 2 , 2A E,QMAPCO PETROLEUM, INC. 094354 1910 IH-10, BAYTOWNDIESEL 1/10/89 2 , 2A E,QMARYLAND CLUB FOODS INC 092569 7105 OLD KATY RD, HOUSTONGASOLINE 5/12/88 2 , 4 E,QMAXWELL HOUSE COFFEE 094083 3900 HARRIS BLVD, HOUSTONUNKNOWN 11/17/89 2 , 4 E,QMCCLENDON SIDNEY SIII 102912 3210 N SHEPHERD, HOUSTONGASOLINE 3/3/92 2 , 2A E,QMELCHER INVESTMENTS 103944 6408 MARTIN LUTHER KING BLVD, HOUSTONUNKNOWN 3/14/91 2A , 1A E,QMELTON TRUCK LINES INC 096637 9110 LIBERTY RD, HOUSTONDIESEL 7/19/90 2 , 6 E,QMETRO 109276 11555 WESTPARK, HOUSTONDIESEL 3/1/95 2 , 4 E,QMETRO TRANSIT AUTHORITY 110735 5700 EASTEX FWY, HOUSTONHYDR FLUID 3/20/96 1B , 1A E,QMETROPOLITAN TRANSIT AUTHORITY 094552 6400 HWY 59, HOUSTONUNKNOWN 1/11/90 2 , 6 E,QMETROPOLITAN TRANSIT AUTHORITY 096579 5555 DEAUVILLE PLAZA DR, HOUSTONUNKNOWN 7/25/90 2A , 4 E,QMETROPOLITAN TRANSIT AUTHORITY 096608 6890 S HWY 59, HOUSTONGASOLINE, DIESEL, WASTE OIL 8/27/90 2 , 2A E,QMIKE CALVERT TOYOTA 107477 2121 S LOOP W, HOUSTONGASOLINE, DIESEL 11/23/93 2 , 6 E,QMIKE HALL CHEVROLET 109884 8100 S HWY 6, HOUSTONUNKNOWN 9/15/95 2 , 2A E,QMILLER HORNBERGER PARTNERSHIP 094868 2800 POLK, HOUSTONGASOLINE 1/16/90 2 , 2A E,QMILLER TRANSPORTERS INC 097982 15855 WOOD DR, CHANNELVIEWDIESEL 2/13/91 2 , 6 E,QMILTON BONIUK 111563 IH 45, HOUSTONGASOLINE, DIESEL 9/3/96 2 , 6 E,Q* MISSOURI PACIFIC RAILROAD111333 9226 KATY FWY, HOUSTONGASOLINE, DIESEL 6/7/96 2 , 2A E,QMOBIL OIL CO. 103766 3702 WESLAYAN, HOUSTONGASOLINE 7/19/90 2 , 2A E,QMOBIL OIL CORP 091026 2802 N SHEPHERD, HOUSTONGASOLINE 1/31/85 2 , 2A E,QMOBIL OIL CORP 091091 10271 NORTH FWY, HOUSTONGASOLINE 7/10/86 2 , 2A E,QMOBIL OIL CORP 091139 103 W NASA RD 1, WEBSTERGASOLINE 7/17/86 2 , 4 E,QMOBIL OIL CORP 091295 4444 W FUQUA, HOUSTONGASOLINE 5/29/86 2 , 5 E,QMOBIL OIL CORP 091375 3803 WESTHEIMER, HOUSTONGASOLINE 7/9/87 2 , 4 E,QMOBIL OIL CORP 091445 13210 MEMORIAL DR, HOUSTONGASOLINE 8/28/87 2 , 4 E,QMOBIL OIL CORP 091685 14603 MEMORIAL DR, HOUSTONGASOLINE 2/15/88 2 , 4 E,QMOBIL OIL CORP 091773 11017 KATY FWY, HOUSTONGASOLINE 4/1/88 2 , 4 E,QMOBIL OIL CORP 091832 6601 SOUTHWEST FWY, HOUSTONGASOLINE 11/1/87 2 , 4 E,QMOBIL OIL CORP 091859 12860 KIMBERLY LN, HOUSTONGASOLINE 4/28/88 2 , 4 E,QMOBIL OIL CORP 091965 10232 S POST OAK, HOUSTONUNKNOWN 6/15/88 2 , 4 E,QMOBIL OIL CORP 092293 8435 KATY FWY, HOUSTONGASOLINE 11/9/88 2A , 6 E,QMOBIL OIL CORP 092746 3141 SOUTHWEST FWY, HOUSTONGASOLINE 9/28/88 2 , 4 E,QMOBIL OIL CORP 093008 10541 ALMEDA GENOA RD, HOUSTONGASOLINE 5/11/89 2A , 6 E,QMOBIL OIL CORP 094800 1801 COLLINGSWORTH, HOUSTONWASTE OIL 7/22/88 2 , 4 E,QTNRCC - 90

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTMOBIL OIL CORP 095064 2202 GESSNER RD, HOUSTONGASOLINE 4/15/89 2 , 6 E,QMOBIL OIL CORP 095381 10601 FUQUA, HOUSTONGASOLINE 2/9/90 2 , 3 E,QMOBIL OIL CORP 095522 2540 UNIVERSITY BLVD, HOUSTONGASOLINE 4/23/90 2A , 6 E,QMOBIL OIL CORP 095525 224 SOUTH AVE, PASADENAGASOLINE 3/5/90 2 , 6 E,QMOBIL OIL CORP 096091 13161 VETERANS MEMORIAL, HOUSTONGASOLINE 6/11/90 2 , 4 E,QMOBIL OIL CORP 099479 3819 RED BLUFF RD, PASADENAGASOLINE 7/1/91 2 , 6 E,QMOBIL OIL CORP 099712 9402 NORTH FWY, HOUSTONGASOLINE 11/30/89 2A , 1A E,QMOBIL OIL CORP 099855 5010 WOODWAY DR, HOUSTONGASOLINE 6/21/91 2 , 2A E,QMOBIL OIL CORP 102076 5408 E FM 1960, HUMBLEGASOLINE 12/20/91 2 , 6 E,QMOBIL OIL CORP 102079 21327 N IH--45, SPRINGGASOLINE 12/9/91 2 , 2A E,QMOBIL OIL CORP 102434 7001 GULF FWY, HOUSTONGASOLINE 11/14/91 2 , 2A E,QMOBIL OIL CORP 102438 1052 NASA RD 1, WEBSTERGASOLINE 11/17/91 2 , 3 E,QMOBIL OIL CORP 102441 8335 S HWY 6, HOUSTONGASOLINE 11/18/91 2 , 3 E,QMOBIL OIL CORP 102448 8003 BEECHNUT, HOUSTONGASOLINE 12/5/91 2 , 2A E,QMOBIL OIL CORP 102449 8235 BROADWAY, HOUSTONGASOLINE 12/20/91 2 , 2A E,QMOBIL OIL CORP 102450 5800 S GESSNER RD, HOUSTONGASOLINE 12/3/91 2A , 6 E,QMOBIL OIL CORP 102451 6243 W FM 1960, HUMBLEGASOLINE 12/10/91 2 , 4 E,QMOBIL OIL CORP 102452 7402 FONDREN, HOUSTONGASOLINE 12/12/91 2 , 4 E,QMOBIL OIL CORP 102455 2747 S HWY 6, HOUSTONGASOLINE 12/16/91 2 , 2A E,QMOBIL OIL CORP 102456 1525 N LOOP 610 W, HOUSTONGASOLINE 11/25/91 2 , 3 E,QMOBIL OIL CORP 102457 5212 ANTOINE DR, HOUSTONGASOLINE 11/25/91 2 , 3 E,QMOBIL OIL CORP 102458 11503 SOUTHWEST FWY, HOUSTONGASOLINE 11/20/91 2 , 2A E,QMOBIL OIL CORP 102460 8497 N HWY 6, HOUSTONGASOLINE 12/3/91 2 , 2A E,QMOBIL OIL CORP 102461 6451 NORTH FWY, HOUSTONGASOLINE 12/2/91 2 , 2A E,QMOBIL OIL CORP 102463 11398 HARWIN DR, HOUSTONGASOLINE 12/17/91 2 , 2A E,QMOBIL OIL CORP 102466 13550 KUYKENDAHL RD, HOUSTONGASOLINE 12/27/91 2 , 2A E,QMOBIL OIL CORP 102469 4406 E SAM HOUSTON N PKWY, HOUSTONGASOLINE 11/27/91 2A , 6 E,QMOBIL OIL CORP 102637 8253 LOUETTA, SPRINGGASOLINE 12/17/91 2 , 2A E,Q* MOBIL OIL CORP103994 6522 WESTHEIMER DR, HOUSTONGASOLINE 5/27/92 2 , 2A E,QMOBIL OIL CORP/SHELL OIL CO 102080 803 S HWY 6, HOUSTONGASOLINE 11/27/91 2 , 6 E,QMOBIL OIL CORP/SHELL OIL CO 102091 10942 W FM 1960, HOUSTONUNKNOWN 1/27/92 2 , 5 E,QMOBIL OIL CORP/SHELL OIL CO 102447 11203 NORTHWEST FWY, HOUSTONGASOLINE 11/22/91 2 , 6 E,QMOBIL OIL CORP/SHELL OIL CO 102454 411 SHELDON RD, CHANNELVIEWGASOLINE 12/11/91 2A , 6 E,QMOBIL OIL CORPORATION 091089 10512 GULF FWY, HOUSTONGASOLINE 6/16/86 2 , 6 E,QMOBIL OIL CORPORATION 102075 9461 JONES RD, HOUSTONGASOLINE 12/3/91 2 , 3 E,Q* MOFFIT OIL112524 13002 KLUGE RD, CYPRESSUNKNOWN 8/12/97 2 , 6 E,QMONKEZ KILANI 091931 7075 BELLFORT, HOUSTONGASOLINE 4/25/88 2 , 2A E,QMONTGOMERY WARD 091016 7500 BELLAIRE BLVD, HOUSTONGASOLINE 8/22/84 2 , 4 E,QMOUNTASIA ENTERTAINMENT INTL 111445 1111 W LOOP NORTH, HOUSTONGASOLINE, OTHER 8/1/96 2 , 2A E,QMOUNTASIA ENTERTAINMENT INTL 111446 1105 W LOOP NORTH, HOUSTONGASOLINE 8/1/96 2 , 2A E,QMUSTANG TRACTOR & EQUIPMENT 108136 7607 WALLISVILLE, HOUSTONDIESEL, WASTE OIL 4/1/94 2 , 2A E,QMUSTANG TRACTOR & EQUIPMENT CO 104818 7607 WALLISVILLE RD, HOUSTONGASOLINE 9/25/92 2A , 1A E,QNAGRA, NARINDER S 107534 1722 S SHAVER, PASADENAGASOLINE 11/19/93 2A , 1A E,QNATIONAL CAR RENTAL SYSTEM 091748 4551 WILL CLAYTON PKWY, HOUSTONDIESEL, GASOLINE 3/16/88 2 , 4 E,QNATIONAL CAR RENTAL SYSTEM INC 093041 AMF, HOUSTONGASOLINE 6/2/89 2 , 2A E,QNATIONAL CONVENIENCE BANKRUPT 111574 17552 STEUBNER AIRLINE, SPRINGGASOLINE 8/19/96 5B , 1A E,QNATIONAL CONVENIENCE BANKRUPT 111585 12701 WINDFERN, HOUSTONGASOLINE 8/27/96 5B , 1A E,QNATIONAL CONVENIENCE BANKRUPT 111716 3944 W FM RD 1960, HOUSTONGASOLINE 9/5/96 5B , 1A E,QTNRCC - 91

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTNATIONAL CONVENIENCE BANKRUPT 111717 12630 TELGE, CYPRESSGASOLINE 9/5/96 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112208 6303 GRIGGS, HOUSTONUNKNOWN 4/3/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112209 7419 IRVINGTON, HOUSTONUNKNOWN 4/3/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112210 10855 TELEPHONE RD, HOUSTONUNKNOWN 4/3/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112283 9230 BUFFALO SPEEDWAY, HOUSTONGASOLINE 4/2/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112343 12520 HWY 90, HOUSTONGASOLINE 5/28/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112353 12801 HOMESTEAD RD, HOUSTONGASOLINE 6/4/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112371 1130 FREEPORT ST, HOUSTONGASOLINE 6/5/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112372 1363 FEDERAL RD, HOUSTONGASOLINE 6/6/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112403 9309 N WAYSIDE, HOUSTONGASOLINE 6/17/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112404 15929 ALDINE WESTFIELD, HOUSTONGASOLINE 6/9/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112405 11703 AIRLINE DR, HOUSTONGASOLINE 6/10/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112406 9545 RICHMOND AVE, HOUSTONUNKNOWN 6/26/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112407 11230 PLAINFIELD, HOUSTONUNKNOWN 6/26/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112408 8611 MOSLEY, HOUSTONUNKNOWN 6/26/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112430 1212 TEXAS AVE, BAYTOWNGASOLINE 6/18/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112478 2512 WARD RD, BAYTOWNGASOLINE 6/16/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112561 1740 JENKINS, PASADENAGASOLINE 11/17/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112562 15211 WOODFOREST, CHANNELVIEWGASOLINE 7/25/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112563 638 DELL DALE, CHANNELVIEWGASOLINE 7/25/97 5B , 1A E,Q* NATIONAL CONVENIENCE BANKRUPT112729 3010 DENKMAN, PASADENAGASOLINE 7/29/97 1B , 1A E,QNATIONAL CONVENIENCE STORES 100347 3202 E PASADENA HWY, PASADENAGASOLINE 9/9/91 5B , 1A E,QNATIONAL CONVENIENCE STORES 104403 16141 MARKET ST, CHANNELVIEWGASOLINE 9/29/92 2 , 5 E,QNATIONAL CONVENIENCE STORES 110177 1311 N GESSNER, HOUSTONGASOLINE 12/15/95 5B , 1A E,QNEWPARK SHIPBUILDING 094609 8502 CYPRESS ST, HOUSTONGASOLINE 1/18/90 2 , 6 E,Q* NORMA FISCHER109347 6020 WASHINGTON, HOUSTONGASOLINE, HYDR FLUID 4/6/95 2 , 2A E,QNORTH FREEWAY NISSAN 105159 8515 NORTH FWY, HOUSTONUNKNOWN 5/27/92 2 , 2A E,Q* NORTHLINE JOINT VENTURE/PCUMM112292 400 NORTHLINE MALL, HOUSTONHYDR FLUID 4/22/97 2A , 6 E,QNORTHWESTERN MUTUAL LIFE INS 098572 3955 RICHMOND AVE, HOUSTONGASOLINE, WASTE OIL 2/15/91 2 , 2A E,QO'ROURKE DISTRIBUTING CO, INC 105625 9624 LONG POINT, HOUSTONGASOLINE, DIESEL 12/3/92 2 , 5 E,QO'ROURKE PETROLEUM PRODUCTS 092408 8524 GULF FWY, HOUSTONGASOLINE 12/15/88 2 , 2A E,Q* OBRIEN POWER EQIUPMENT INC112522 3622 PINEMONT, HOUSTONUNKNOWN 8/12/97 2 , 6 E,Q* OCEAN HARVEST WHOLESALE104206 1111 LIVEOAK, HOUSTONGASOLINE 8/12/92 2 , 2A E,QOVERNITE TRANSPORTATION 094619 2525 CAVALCADE ST, HOUSTONDIESEL 1/22/90 2 , 2A E,QP & S RICE MILLS 095900 6600 LONG POINT, HOUSTONGASOLINE 4/23/90 2 , 2A E,QPANGLIA MANAGEMENT, INC. 096663 4120 S SHAVER, HOUSTONGASOLINE 9/5/90 5B , 2A E,Q* PARAMOUNT CAR WASH0109641 5102 KIRBY, HOUSTONGASOLINE 6/1/95 2 , 2A E,QPARK NATIONAL BANK 093270 3425 FONDREN, HOUSTONGASOLINE 7/5/89 2 , 4 E,Q* PATTON STREET CORP110540 4101 FULTON, HOUSTONUNKNOWN 3/11/96 2 , 2A E,QPENTRON INC 097730 5200 NAVIGATION, HOUSTONDIESEL 12/28/90 2 , 6 E,QPETROLEUM WHOLESALE INC 093617 203 E LITTLE YORK, HOUSTONGASOLINE 9/8/89 1B , 1A E,Q* PETROLEUM WHOLESALE INC112808 333 LUTCHER, ORANGEGASOLINE, DIESEL 11/26/97 1B , 1A E,QPETROLEUM WHOLESALE, INC. 094350 5795 N BELT, HOUSTONGASOLINE 12/8/89 2 , 2A E,QPHILLIPS 66 CO 097125 4910 WESLAYAN, HOUSTONGASOLINE 10/12/90 2 , 4 E,QPHILLIPS 66 CO 099587 7411 HILLCROFT, HOUSTONGASOLINE 2/7/90 2 , 5 E,QPHILLIPS 66 CO 105395 8569 LONG POINT, HOUSTONGASOLINE 8/20/92 2 , 2A E,Q* PHILLIPS 66 CO111144 9996 S MAIN, HOUSTONGASOLINE, DIESEL 5/21/96 2 , 2A E,Q* PHILLIPS 66 CO111185 11139 BELLAIRE BLVD, HOUSTONUNKNOWN 6/14/96 2 , 2A E,QTNRCC - 92

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPST* PHILLIPS 66 CO111198 2627 T C JESTER, HOUSTONGASOLINE, DIESEL 5/14/96 2 , 2A E,QPHILLIPS 66 CO 111342 8602 BEECHNUT, HOUSTONGASOLINE 5/10/96 2 , 2A E,QPINEMONT BANK 098028 823-825 THORTON ST, HOUSTONGASOLINE 1/31/91 2 , 2A E,QPIONEER CONCRETE OF TEXAS INC 094947 302 BENNINGTON, HOUSTONGASOLINE 1/18/90 2 , 2A E,QPORT OF HOUSTON AUTHORITY 099478 8200 CLINTON DR, HOUSTONGASOLINE 4/10/91 2 , 2A E,QPORT OF HOUSTON AUTHORITY 102741 WHARF 10 & 11, HOUSTONGASOLINE, DIESEL 3/26/92 2 , 2A E,QPRIME CAPITOL 110787 3002 LITTLE YORK, HOUSTONGASOLINE, WASTE OIL, HYDRFLUID4/5/96 2 , 2A E,QPRIME EQUIPMENT 107479 11003 BISSONNET, HOUSTONGASOLINE 11/29/93 2 , 2A E,Q* PRIMECO INC110786 2313 SPENCER HWY, PASADENAGASOLINE, DIESEL 4/4/96 2 , 2A E,Q* PRIMECO INC.110925 15210 FM 529, HOUSTONGASOLINE, DIESEL 4/12/96 2 , 2A E,QQUANTUM CHEMICAL CORP 097293 11603 STRANG RD, LA PORTEWASTE OIL 11/19/90 2A , 6 E,QR B EVERETT 095335 3118 TEXAS, HOUSTONDIESEL 4/2/90 2 , 2A E,QRAK DEVELOPMENT CORP 099627 4735 ANDERSON RD, HOUSTONGASOLINE 6/5/91 2 , 2A E,Q* RDI WOODFOREST L P112648 388 UVALDE, HOUSTONUNKNOWN 9/26/97 1B , 1A E,QREEF INDUSTRIES INC 099994 10020 MYKAWA, HOUSTONOTHER 5/2/91 2A , 6 E,QREYNOLDS METALS CO 097834 10000 N LOOP E, HOUSTONCHEMICAL 1/25/91 2 , 6 E,QRIAD A. SAIDI 101814 3102 LITTLE YORK RD, HOUSTONGASOLINE 7/12/91 2 , 2A E,QRICE FOOD MARKETS INC 095228 5333 GULFTON, HOUSTONGASOLINE 2/14/90 2A , 6 E,Q* ROADWAY SERVICES INC107717 9415 WALLISVILLE RD, HOUSTONGASOLINE, DIESEL, OTHER 1/17/94 2A , 1A E,Q* ROSEMORE ENTERPRISES INC111924 5902 TELEPHONE RD, HOUSTONGASOLINE 9/16/96 1B , 1A E,QROSSMORE ENTERPRISES 091413 3423 E FM 1960, HOUSTONUNKNOWN 11/14/86 2 , 6 E,QROSSMORE ENTERPRISES 095290 11249 BISSONNET, HOUSTONGASOLINE 3/13/90 2 , 4 E,QRUDERS, INC. 091797 11919 SPENCER RD, HOUSTONUNKNOWN 3/1/88 2 , 6 E,QRUPANI SALMAN 091192 13203 VETERANS MEMORIAL, HOUSTONGASOLINE 12/4/86 2 , 2A E,QRYDER TRUCK RENTAL INC 096427 11200 HEMPSTEAD HWY, HOUSTONDIESEL 7/7/90 2 , 2A E,Q* SADRU DIN & ALMAHRAN CORP.109734 707 N WAYSIDE, HOUSTONGASOLINE 7/27/95 2 , 2A E,QSAGE SOUTHWEST INC 092600 4645 BEECHNUT, HOUSTONGASOLINE 2/7/89 2 , 2A E,QSALVATION ARMY 094203 1015 HEMPHILL, HOUSTONDIESEL 12/13/89 2 , 2A E,QSANDHILL PRIME, LTD 096087 605 W GRAY, HOUSTONGASOLINE 6/19/90 2 , 4 E,QSCHNITZER STEEL INDUSTRIES 094821 7501 LIBERTY RD, HOUSTONGASOLINE 12/28/89 2 , 2A E,Q* SCURLOCK FOUNDATION105551 6532 MARTIN LUTHER KING BLVD, HOUSTONUNKNOWN 12/4/92 2 , 5 E,Q* SCURLOCK FOUNDATION105865 9514 HIRSCH RD, HOUSTONGASOLINE, HYDR FLUID 12/5/92 2 , 2A E,QSERVICE TRANSPORT COMPANY 093456 7900 ALMEDA GENOA, HOUSTONDIESEL 7/17/89 2 , 2A E,QSHADOW DALE ELEVATOR INC 109391 1235 SHADOW DALE, HOUSTONDIESEL 4/1/93 2A , 1A E,QSHAW'S GAS MART 098952 5606 S SHAVER, HOUSTONGASOLINE 5/2/91 2A , 1A E,QSHELL OIL CO 091046 11110 WESTHEIMER, HOUSTONGASOLINE 10/4/85 2 , 4 E,QSHELL OIL CO 091133 IH-45, HOUSTONGASOLINE 6/7/86 2 , 2A E,QSHELL OIL CO 091387 8555 BEECHNUT, HOUSTONGASOLINE 7/1/87 2 , 4 E,QSHELL OIL CO 091614 11639 KATY FWY, HOUSTONGASOLINE 1/18/88 2 , 6 E,QSHELL OIL CO 091693 2302 W HOLCOMBE, HOUSTONGASOLINE 2/23/88 2 , 4 E,QSHELL OIL CO 091790 10404 NORTHWEST FWY, HOUSTONGASOLINE 4/7/88 2 , 6 E,QSHELL OIL CO 092324 10801 S POST OAK, HOUSTONGASOLINE 11/4/88 2 , 6 E,QSHELL OIL CO 093202 402 UVALDE RD, HOUSTONGASOLINE 6/16/89 2 , 6 E,QSHELL OIL CO 093218 8 CENTER ST, DEER PARKGASOLINE 11/16/88 2 , 6 E,QSHELL OIL CO 093280 11997 S MAIN, HOUSTONGASOLINE 7/5/89 2 , 2A E,QSHELL OIL CO 093752 6031 IH-45, HOUSTONGASOLINE 9/27/89 2 , 6 E,QSHELL OIL CO 093754 9602 CHIMNEY ROCK, HOUSTONGASOLINE 9/27/89 2 , 2A E,QSHELL OIL CO 094995 4066 WESTHEIMER, HOUSTONGASOLINE 2/23/90 2 , 3 E,QTNRCC - 93

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTSHELL OIL CO 095709 7201 BISSONNET, HOUSTONUNKNOWN 5/21/90 2 , 2A E,QSHELL OIL CO 096096 S RICHEY RD, PASADENAGASOLINE, DIESEL 5/21/90 2 , 6 E,QSHELL OIL CO 096324 15831 DRUMMET BLVD, HOUSTONGASOLINE 6/13/90 2 , 2A E,QSHELL OIL CO 096916 3939 SOUTHWEST FWY, HOUSTONGASOLINE 10/9/90 2 , 6 E,QSHELL OIL CO 097417 13300 NORTHWEST FWY, HOUSTONGASOLINE 4/4/90 2 , 6 E,QSHELL OIL CO 100648 11500 SOUTHWEST FWY, HOUSTONGASOLINE 6/18/87 2 , 6 E,QSHELL OIL CO 100652 21403 N IH--45, SPRINGGASOLINE 10/18/91 2 , 2A E,QSHELL OIL CO 102445 8818 RICHMOND, HOUSTONGASOLINE 11/25/91 2 , 3 E,QSHELL OIL CO 104839 4646 SPENCER HWY, PASADENAGASOLINE 4/27/92 2 , 2A E,QSHELL OIL CO 107322 829 W PASADENA FWY, PASADENAWASTE OIL 10/7/93 2 , 2A E,QSHELL OIL CO 108798 7204 S LOOP E, HOUSTONGASOLINE 11/9/94 2 , 2A E,Q* SHELL OIL CO109083 5822 FM 1960, HOUSTONGASOLINE 1/17/95 2A , 1A E,QSHELL OIL CO 111795 202 W CROSSTIMBERS, HOUSTONGASOLINE 10/9/96 1B , 1A E,Q* SHELL OIL PRODUCTS CO112649 18535 FM 249, HOUSTONGASOLINE 8/1/97 2 , 6 E,QSHIPRA ENTERPRISE 104191 4701 SAN JACINTO ST, HOUSTONGASOLINE 8/23/91 5B , 1A E,QSHOP N' MARKET 100657 5008 ALDINE BENDER RD, HOUSTONGASOLINE 10/21/91 1B , 1A E,QSIERRA TERRACE INC 093203 7401 S MAIN, HOUSTONGASOLINE 6/15/89 2 , 5 E,QSMALL BUSINESS ADMINISTRATION 092338 12400 BEDFORD ST, HOUSTONDIESEL 10/10/88 2 , 6 E,Q* SMB PARTNERS LTD106788 2616 POLK, HOUSTONGASOLINE 6/4/93 2 , 2A E,QSOFT TOUCH CAR WASH 104692 8901 W BELFORT, HOUSTONGASOLINE 10/17/91 2 , 2A E,Q* SOUTHERN PACIFIC LINES109414 700 MCKEE ST, HOUSTONUNKNOWN 12/15/94 2 , 2A E,QSOUTHERN STEVEDORING CO., INC. 098869 7325 J W PEAVY, HOUSTONGASOLINE 5/7/91 2 , 2A E,QSOUTHLAND CORP 091798 6116 GULFTON, HOUSTONGASOLINE 11/12/87 5B , 2A E,QSOUTHLAND CORP 111803 9504 AIRLINE DR, HOUSTONUNKNOWN 10/24/96 2 , 2A E,QSOUTHWEST DISTRIBUTORS 093568 1301 WHITE ST, HOUSTONGASOLINE 8/28/89 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 092356 9216 OLD KATY RD, HOUSTONGASOLINE 11/30/88 2 , 4 E,QSOUTHWESTERN BELL TELEPHONE CO 096047 2032 MANSARD, HOUSTONUNKNOWN 7/3/90 2A , 6 E,QSOUTHWESTERN BELL TELEPHONE CO 096457 5434 GASMER, HOUSTONGASOLINE 7/15/90 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 098071 1210 BLUEBELL RD, HOUSTONGASOLINE 2/20/91 2 , 2A E,QSPEEDWAY SUPERAMERICA LLC 092272 322 RAYFORD, SPRINGGASOLINE 10/26/88 2 , 4 E,QSPRING BRANCH ISD 096583 1066 GESSNER, HOUSTONGASOLINE, DIESEL 8/22/90 2 , 6 E,QSPRING ISD 097377 24037 HARDY RD, SPRINGGASOLINE 6/28/90 2 , 6 E,Q* SST FOOD STORE099026 13103 HIRAM CLARK, HOUSTONGASOLINE 4/23/91 1B , 1A E,QSTAR ENTERPRISE 091363 9502 JONES RD, HOUSTONGASOLINE 6/25/87 2 , 4 E,QSTAR ENTERPRISE 091386 8610 ALMEDA, HOUSTONUNKNOWN 4/1/87 2 , 5 E,QSTAR ENTERPRISE 091860 12859 KIMBERLY LN, HOUSTONGASOLINE 4/1/88 2 , 4 E,QSTAR ENTERPRISE 092286 6502 SOUTHWEST FWY, HOUSTONGASOLINE 11/2/88 2 , 4 E,QSTAR ENTERPRISE 092318 5803 FONDREN, HOUSTONGASOLINE 11/16/88 2 , 4 E,QSTAR ENTERPRISE 092641 3105 RED BLUFF RD, PASADENAUNKNOWN 2/17/89 2 , 3 E,QSTAR ENTERPRISE 092725 6665 S BRAESWOOD, HOUSTONGASOLINE 3/17/89 2 , 2A E,QSTAR ENTERPRISE 093166 2103 WESTHEIMER, HOUSTONUNKNOWN 6/24/89 2 , 2A E,QSTAR ENTERPRISE 093872 4976 N HWY 6, HOUSTONDIESEL 10/31/89 2 , 6 E,QSTAR ENTERPRISE 093908 5601 MEMORIAL DR, HOUSTONGASOLINE 10/20/89 2 , 6 E,Q* STAR ENTERPRISE096627 8610 ALMEDA, HOUSTONGASOLINE 8/22/90 2 , 2A E,QSTAR ENTERPRISE 096799 8435 FM 1960, HUMBLEGASOLINE 2/12/88 2 , 4 E,QSTAR ENTERPRISE 098041 10202 WESTHEIMER RD, HOUSTONGASOLINE, WASTE OIL 2/20/91 2 , 4 E,QSTAR ENTERPRISE 098222 34 ALDINE BENDER, HOUSTONGASOLINE, DIESEL 3/12/91 2 , 2A E,QSTAR ENTERPRISE 098223 2502 N LOOP 610 W, HOUSTONGASOLINE, DIESEL 3/12/91 2 , 2A E,QTNRCC - 94

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTSTAR ENTERPRISE 098322 2122 GESSNER, HOUSTONGASOLINE 3/21/91 2 , 2A E,QSTAR ENTERPRISE 098323 11603 HWY 290, HOUSTONGASOLINE 3/21/91 2 , 2A E,QSTAR ENTERPRISE 098324 9492 KEMPWOOD, HOUSTONGASOLINE 3/21/91 2 , 6 E,QSTAR ENTERPRISE 098541 801 N LOOP 610, HOUSTONGASOLINE, WASTE OIL 4/4/91 2 , 2A E,QSTAR ENTERPRISE 098738 7148 BISSONNET RD, HOUSTONUNKNOWN 2/20/91 2 , 2A E,QSTAR ENTERPRISE 099153 9201 N LOOP E, HOUSTONGASOLINE 9/1/90 2 , 2A E,QSTAR ENTERPRISE 099252 8601 S HWY 59, HOUSTONGASOLINE 3/26/91 2 , 4 E,QSTAR ENTERPRISE 104017 718 N LOOP 610 E, HOUSTONUNKNOWN 4/18/92 2 , 2A E,QSTAR ENTERPRISE 104279 10097 GESSNER, HOUSTONGASOLINE 6/3/92 2 , 2A E,QSTAR ENTERPRISE 104646 6929 N LOOP E, HOUSTONGASOLINE 9/10/92 2 , 2A E,QSTAR ENTERPRISE 104714 1105 BAY AREA BLVD, HOUSTONGASOLINE, DIESEL 10/10/91 2 , 4 E,Q* STAR ENTERPRISE104787 3425 EASTEX FWY, HOUSTONGASOLINE 9/10/92 2A , 1A E,QSTAR ENTERPRISE 105103 2601 W LOOP S, HOUSTONGASOLINE 10/8/92 1B , 1A E,QSTAR ENTERPRISE 106047 4401 W 18TH ST, HOUSTONGASOLINE 1/26/93 2A , 1A E,QSTAR ENTERPRISE 106066 8702 BELLAIRE, HOUSTONGASOLINE 2/1/93 2 , 4 E,QSTAR ENTERPRISE 106067 7025 S LOOP E, HOUSTONGASOLINE 2/4/93 2 , 6 E,QSTAR ENTERPRISE 106194 14754 MEMORIAL DR, HOUSTONGASOLINE 2/22/93 2 , 2A E,Q* STAR ENTERPRISE106250 13402 HOLLY PARK, CHANNELVIEWGASOLINE 2/26/93 2 , 2A E,QSTAR ENTERPRISE 106517 12303 JONES RD, HOUSTONGASOLINE, DIESEL 3/2/93 2 , 6 E,QSTAR ENTERPRISE 106578 7025 S LOOP E, HOUSTONGASOLINE, DIESEL 2/5/93 2A , 1A E,Q* STAR ENTERPRISE106831 6923 ANTOINE, HOUSTONGASOLINE 6/11/93 2 , 4 E,Q* STAR ENTERPRISE107238 10230 IH--10, JACINTO CITYGASOLINE 7/23/93 2 , 2A E,QSTAR ENTERPRISE 108667 11905 BISSONNET, HOUSTONGASOLINE 9/29/94 2 , 2A E,Q* STAR ENTERPRISE108833 3936 KIRBY, HOUSTONHYDR FLUID, GASOLINE 11/15/94 2 , 2A E,Q* STAR ENTERPRISE110772 15515 KUYKENDAHL, HOUSTONUNKNOWN 4/5/96 2 , 2A E,QSTAR ENTERPRISE 110927 22560 ALDINE WESTFIELD, HOUSTONGASOLINE, DIESEL 4/3/96 1B , 1A E,QSTAR ENTERPRISE 111001 8402 HILLCROFT, HOUSTONGASOLINE 2/28/96 1B , 1A E,QSTAR ENTERPRISE 111002 8599 W BELLFORT, HOUSTONGASOLINE 2/24/96 2 , 2A E,Q* STAR ENTERPRISE111297 4750 FAIRMONT PKWY, HOUSTONUNKNOWN 7/10/96 1B , 1A E,QSTAR ENTERPRISE 111553 13102 MURPHY RD, STAFFORDGASOLINE, DIESEL 8/8/96 2 , 2A E,QSTAR ENTERPRISE 111570 16131 NORTHWEST FWY, HOUSTONGASOLINE, DIESEL 9/3/96 2 , 6 E,QSTAR ENTERPRISE 111571 1402 FM 1960, HOUSTONGASOLINE 9/3/96 1B , 1A E,QSTAR ENTERPRISE 111572 5103 W FM 1960, HOUSTONGASOLINE, DIESEL 9/3/96 1B , 1A E,QSTAR ENTERPRISE 111601 11019 BRIAR FOREST, HOUSTONGASOLINE 9/10/96 2 , 2A E,QSTAR ENTERPRISE 111644 1339 DAIRY ASHFORD, HOUSTONGASOLINE, DIESEL 8/8/96 2 , 2A E,Q* STAR ENTERPRISE112092 2203 SOUTHWEST FWY, HOUSTONUNKNOWN 1/30/97 2 , 2A E,Q* STAR ENTERPRISES112496 12776 EAST FWY, HOUSTONUNKNOWN 7/25/97 2 , 2A E,QSTEARNS CORPORATION 101360 8399 WESTVIEW, HOUSTONWASTE OIL 12/4/91 2 , 2A E,QSTEWART & STEVENSON SERVICES 102973 8631 EAST FWY, HOUSTONDIESEL 4/28/92 2 , 2A E,Q* STOP N SERV111004 20409 FM 2100, CROSBYUNKNOWN 5/17/96 2 , 2A E,QSTOP N SERVE 111007 1245 ATASCOCITA RD, HUMBLEGASOLINE 5/16/96 2 , 2A E,Q* STRAFCO INC110474 4003 LEELAND, HOUSTONGASOLINE 4/3/96 2 , 2A E,QSTRASBURGER ENTERPRISES INC 091357 8770 W TIDWELL, HOUSTONGASOLINE 6/11/87 2 , 6 E,Q* T E P P C O & CHEVRON112041 HARDY ST, HOUSTONUNKNOWN 1/3/97 2D , 1A E,QTALKINGTON DEAN MS 105207 12537 MARKET ST, HOUSTONUNKNOWN 10/29/92 2 , 2A E,QTARRANT DISTRIBUTORS INC 106403 9835 GENARD RD, HOUSTONGASOLINE 10/2/92 2 , 6 E,QTENNECO OIL INC 091308 8203 FONDREN RD, HOUSTONGASOLINE 5/1/84 2 , 2A E,QTENNECO OIL INC 092566 22102 N LOOP 494, KINGWOODGASOLINE 2/2/89 2 , 6 E,QTNRCC - 95

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPST* TENNESSEE GAS PIPELINE091025 22602 HEGAR RD, HOCKLEYGASOLINE 11/17/84 2 , 2A E,QTEXACO REFINING & MARKETING 091238 6213 LYONS AVE, HOUSTONGASOLINE 3/6/87 2 , 4 E,QTEXACO REFINING & MARKETING 092013 5012 BISSONNET, HOUSTONGASOLINE 7/19/88 2A , 6 E,QTEXACO REFINING & MARKETING 092234 8850 NORTH LOOP, HOUSTONGASOLINE 10/26/88 2 , 5 E,QTEXACO REFINING & MARKETING 092995 1702 CAPITOL AVE, HOUSTONGASOLINE 5/1/89 2 , 6 E,QTEXACO REFINING & MARKETING 093093 4902 MARTIN LUTHER KING BLVD, HOUSTONUNKNOWN 6/7/89 2 , 4 E,QTEXACO REFINING & MARKETING 093127 6250 BISSONNET RD, HOUSTONUNKNOWN 6/14/89 2 , 6 E,QTEXACO REFINING & MARKETING 093575 10902 BELLAIRE BLVD, HOUSTONWASTE OIL 8/29/89 2 , 2A E,QTEXACO REFINING & MARKETING 094130 995 BUNKER HILL, HOUSTONGASOLINE 4/25/89 2 , 2A E,QTEXACO REFINING & MARKETING 097713 2401 CAMPBELL RD, HOUSTONGASOLINE, WASTE OIL 11/8/90 2 , 2A E,QTEXACO REFINING & MARKETING 100223 6115 ROOT RD, SPRINGHYDR FLUID 2/6/91 2 , 3 E,QTEXACO REFINING & MARKETING 104593 4515 FUQUA ST, HOUSTONGASOLINE 9/20/91 2 , 2A E,QTEXAS BOLT CO 093960 3233 W 11TH ST, HOUSTONGASOLINE 10/20/89 2 , 2A E,QTEXAS PARKS & WILDLIFE DEPT 110563 105 SAN JACINTO, LA PORTEUNKNOWN 3/11/96 2 , 2A E,Q* THE FINGER CO112006 5320 N SHEPHERD RD, HOUSTONGASOLINE 12/12/96 1B , 1A E,QTHE MAY DESIGN & CONSTRUCT CO 096353 2103 EASTWOOD ST, HOUSTONUNKNOWN 7/18/90 2A , 6 E,QTHOMAS C F 096493 1713 BRITTMOORE RD, HOUSTONDIESEL 7/26/90 2 , 5 E,QTHOMAS MOSLEY 111151 4704 N SHEPHERD DR, HOUSTONGASOLINE 1/16/96 1B , 6 E,Q* THOMAS OLBRICHT099578 7100 SCHNEIDER ST, HOUSTONGASOLINE 7/12/91 2 , 2A E,QTHYSSEN STEEL GROUP 106522 1335 BOYLES ST, HOUSTONGASOLINE 3/5/93 2 , 2A E,QTIDE AIR INC 104898 4430 BRITTMOORE, HOUSTONGASOLINE, DIESEL, WASTE OIL 10/1/92 2 , 2A E,QTRANSCO ENERGY COMPANY 098591 17650 CHANUTE RD, HOUSTONWASTE OIL 4/8/91 2 , 2A E,QTRI CITY HOSPITAL 108367 4040 RED BLUFF, PASADENADIESEL 3/3/94 2 , 2A E,QTUBOSCOPE 092634 14940 TALCOTT, CHANNELVIEWCHEMICAL 11/21/88 2A , 2A E,QTXDOT 094427 11800 FM 1960, HUFFMANCHEMICAL 10/16/89 2 , 2A E,QTXDOT 096460 702 FM 1959, HOUSTONGASOLINE, DIESEL 7/27/90 2 , 2A E,QTXDOT 096461 19321 N IH-45, SPRINGGASOLINE 6/8/89 2 , 2A E,QTXDOT 096467 7303 MESA DR, HOUSTONGASOLINE, DIESEL 7/24/90 2 , 2A E,Q* TXDOT097038 14838 NORTHWEST FWY, HOUSTONGASOLINE 10/4/90 2 , 2A E,QTXDOT 098593 9279 EASTEX FWY, HOUSTONGASOLINE 4/2/91 2 , 2A E,QTXDOT 098826 3502 N HWY 59, HOUSTONGASOLINE 5/1/91 2 , 5 E,QTXDOT 098987 11222 EASTEX FWY, HOUSTONGASOLINE 5/16/91 2A , 1A E,QTXDOT 100059 3730 EASTEX FWY, HOUSTONGASOLINE, DIESEL 5/31/89 2 , 2A E,Q* TXDOT102814 BATTLEGROUND RD, LA PORTEGASOLINE 4/24/92 2 , 2A E,QTXDOT 107835 18827 HWY 249, HOUSTONGASOLINE 1/20/94 2A , 1A E,QU HAUL CO OF HOUSTON 096424 5333 NORTH FWY, HOUSTONGASOLINE, WASTE OIL 7/18/90 2 , 2A E,QU HAUL CO OF HOUSTON 096901 9411 W FM 1960, HOUSTONGASOLINE 5/16/90 2 , 4 E,QU HAUL CO OF HOUSTON 104869 6505 FONDREN, HOUSTONGASOLINE, WASTE OIL 10/6/92 2 , 2A E,QU HAUL CO OF HOUSTON 106724 8015 S GESSNER, HOUSTONGASOLINE 8/25/92 2A , 1A E,QU-HALL OF HOUSTON 103523 11356 EASTEX FWY, HOUSTONUNKNOWN 10/29/91 1B , 1A E,QU.S. PETROLEUM 091649 211 W CROSSTIMBERS, HOUSTONGASOLINE 2/4/88 2 , 6 E,QULTRAMAR DIAMOND SHAMROCK 092560 11900 BISSONNET RD, HOUSTONGASOLINE 11/15/88 2A , 6 E,QULTRAMAR DIAMOND SHAMROCK 097042 7963 BELLFORT RD, HOUSTONGASOLINE 10/22/90 2 , 2A E,QULTRAMAR DIAMOND SHAMROCK 098153 16602 EL CAMINO REAL, CLEAR LAKEGASOLINE 12/20/90 2 , 2A E,QUNION PACIFIC RAILROAD 108346 NASA RD #1, WEBSTERDIESEL 1/27/94 2A , 6 E,Q* UNION PACIFIC RR CO099580 6800 KIRKPATRICK BLVD, HOUSTONDIESEL 7/2/91 2 , 2A E,Q* UNITED INSURANCE CO OF AMERICA112547 3300 SMITH, HOUSTONGASOLINE, WASTE OIL 6/12/97 1B , 1A E,QUNITED PARCEL SERVICE 092770 8330 SWEETWATER, HOUSTONGASOLINE 3/10/89 2 , 2A E,QTNRCC - 96

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISPSTWUDHARRISONENF/WSTUNITED PARCEL SERVICE 094321 8200 SWEETWATER LN, HOUSTONGASOLINE 11/16/89 2 , 2A E,Q* UNIVERSITY OF HOUSTON099545 4211 ELGIN ST, HOUSTONGASOLINE 6/17/91 1B , 1A E,QUNIVERSITY OF HOUSTON 103341 4800 CALHOUN RD, HOUSTONGASOLINE, DIESEL 6/4/92 2 , 5 E,QUNIVERSITY OF HOUSTON 107074 3708 ELGIN, HOUSTONGASOLINE 6/21/93 2 , 2A E,QUNKNOWN 091439 KIMBERLY LN, HOUSTONGASOLINE 8/5/87 2 , 4 E,QUNKNOWN 096393 WESLAYAN, HOUSTONGASOLINE 7/2/90 2A , 1A E,QUNKNOWN 105596 GASOLINE 11/13/91 2A , 6 E,QUPS TRUCKING LEASING 092762 10800 NORTHWEST FWY, HOUSTONDIESEL 3/24/89 2 , 5 E,QUS AIR FORCE ANDREWS 099849 ELLINGTON FIELD, HOUSTONCHEMICAL 1/4/91 2 , 2A E,QUS COAST GUARD 107940 1178 ELLINGTON FIELD, HOUSTONDIESEL 2/4/94 2 , 2A E,QVAN LEER FLEXIBLES 096575 9505 BAMBOO, HOUSTONWASTE OIL 7/18/90 2 , 2A E,QVICTOR SMOLIK 095916 14301 S MAIN, HOUSTONGASOLINE 5/16/90 2 , 5 E,QVIKING FREIGHT SYSTEMS 096802 5800 MESA RD, HOUSTONDIESEL 9/11/90 2 , 2A E,QW C FOSTER 109423 1849 AIRLINE DR, HOUSTONGASOLINE 12/28/94 2A , 1A E,QWALGREENS COMPANY 106680 8110 KEMPWOOD, HOUSTONDIESEL 2/1/93 2 , 2A E,Q* WALTER ADKINS102411 10440 NORTHWEST FWY, HOUSTONGASOLINE 2/29/92 2 , 5 E,Q* WASTE MANAGEMENT INDUSTRIAL SE112818 602 S 16TH, LA PORTEUNKNOWN 12/8/97 2 , 6 E,QWEINGARTEN REALTY 094530 1911 EDGEBROOK, HOUSTONWASTE OIL 1/19/90 2A , 6 E,QWEINGARTEN REALTY 094621 3640 N MAIN, HOUSTONGASOLINE 6/7/89 2 , 2A E,QWELLS FARGO 093825 5301 SPENCER HWY, PASADENAGASOLINE 8/29/89 2A , 6 E,Q* WEST END LUMBER CO112722 9335 N HWY 69, HOUSTONGASOLINE, DIESEL 10/6/97 1B , 1A E,QWILLIAM G STOKES 099135 14002 HEMPSTEAD HWY, HOUSTONGASOLINE 5/24/91 2A , 6 E,Q* WILLIS HARGRAVE112588 8512 HEMPSTEAD HWY, HOUSTONGASOLINE 7/18/97 1B , 1A E,Q* WPW MANAGEMENT CORP110755 LOOP 336 TIMBERLINE, CONROEUNKNOWN 4/5/96 2 , 2A E,QZAKOIL INTERNATIONAL INC 111628 5722 LOCKWOOD, HOUSTONGASOLINE 8/28/96 2 , 2A E,QZAKOIL INTERNATIONAL INC 111768 11037 MARKET, HOUSTONGASOLINE 9/18/96 2 , 2A E,QZAKOIL INTERNATIONAL INC 111770 4101 ALMEDA RD, HOUSTONGASOLINE 9/9/96 2 , 2A E,QFOUNTAINHEAD MUNICIPAL UTIL DIST 1010435 WELL 2 (G1010435B) - 12706 MIDDLESBOURGH BENZENE, ETHYL BENZENE,ALKANES, CYCLOHEXANAE,CYCLOPROPANE, PROPANE,XYLENESHARRIS COUNTY MUD NO. 150 1011250 WELL 1 (G1011250A) - 11919 LOVELAND PASS /WELL 2 (G1011250B) 12010 ANTOINE DRIVEBENZENE, ETHYLBENZENE,CHLOROMETHANE,CHLOROETHANE,BROMOMETHANE, PROPANE,METHYLCYCLOHEXANEHARRIS COUNTY MUD NO. 217 1011983 (G1011983A) - 2535 SPEARS RD.BENZENE, CYCLOHEXANE,METHYL CYCLOHEXANE, 2-METHYL PROPANE, 2-METHYLBUTANE, BUTANEKITZWOOD 1011536 WELL 1 (G1011536A) & WELL 2 (G1011536B) - 0.85 MI BENZENE, XYLENES, ETHYLW BOURDEAUX & TELGE ROADS, END OF CAMELIA BENZENE, CYCLOHEXANE,ST.DICHLOROMETHANE,BROMOMETHANETHREE LAKES MUD NO 1 1011908 WELL 1 (G1011908A) - NW OF AMISTAD ST., ESE OFHYW 249 AND BOUDREAUX RD.BENZENE, CYCLOHEXANE,METHYL CYCLOHEXANE, METHYLCYCLOPENTANE, PROPANE, 2-METHYL BUTANE10/23/92 2C , 5 E,Q,V,28/4/87 2C , 5 E,Q,V,25/16/90 2C , 5 E,Q,V,23/15/91 2C , 5 E,Q,V,29/18/90 2 , 6 E,Q,V,2STAR ENTERPRISE - WASKOM 35841 FM 9, 2 MILES S. OF WASKOMPETROLEUM HYDROCARBONS 11/1/90 3B , 2A EQTNRCC - 97

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HARRISONENF/WSTPCD/CAPCD/ENFPCD/SUPPSTTRW-REDA PUMP 34132 3304 ROSBOROUGH SPRINGS RD., MARSHALL CHLORINATED SOLVENTS 1/22/85 4A , 5 EQV12US ARMY LONGHORN AMMO 30990 14 MI NE OF MARSHALL NEAR KARNACKMETHYLENE CHLORIDE, 1,1,1 - 9/1/84 3A , 2A EQVTRICHLOROETHWELLMAN INDUSTRIES (FORMER SITE OF) 33350 #7 INDUSTRIAL DRIVE, LONGVIEWCR, CD, NI, CU, ZN 5/15/90 4A , 2B ELONGHORN ARMY AMMUNITIONS PLANT 30990 KARNACK, 14 MI NORTHEAST OF MARSHALLORGANICS, METALS, EXPLOSIVES 9/1/84 5A , 3 E,Q,V,2,3WESCO VALVE & MFG. CO 34966 4000 AIRPORT ROAD, MARSHALLCHROMIUM 3/7/94 4 , 2 EMOBIL OIL CORP - WASCOM TERMINAL 31667 FM 9 SOUTH, 1/4 MI SOUTH OF WASKOMBTEX 11/7/86 2C , 2A EQ YTEXAS EASTMAN 30137 HWY 149 S., LONGVIEWSOLVENTS 6/26/89 3A , 5 EQV23LONGHORN ARMY AMMUNITION PLANTSUPERFUND SITEKARNACKMUNITIONS, HEAVY METALSMARSHALL WOOD PRESERVING 39804 2700 WEST HOUSTON STREET, MARSHALL, TX CREOSOTE,PENTACHLOROPHENOL5A , 2AE,Q,V,2,36/25/97 5B , 2A E,Q,V,3STEWCO, INC. SUPERFUND SITE SITE 1-LOCATED ON FM 9 APPROXIMATELY 1/2 MILE VOLITILE ORGANIC COMPOUNDS 5A , 3 E,Q,V,2,3SOUTH OF THE FM 9/IH 20 INTERSECTION. SITE 2-ONIH 20 1 MILE WEST OF FM 9/IH 20 INTERSEC.AMERICAN NORIT CO INC 095929 W UNIVERSITY DR, MARSHALLGASOLINE, DIESEL 6/12/90 2 , 5 E,Q* BONNIE SPANGLER105870 100 W WRIGHT, MARSHALLGASOLINE 1/14/92 2 , 2A E,QBOYD-HESSER TIRE CO 100598 1701 E GRAND AVE, MARSHALLGASOLINE 8/26/91 5B , 2A E,Q* BRADLEY EPPERSON112526 N HWY 59, MARSHALLUNKNOWN 8/12/97 1B , 1A E,QCAPPS ARTHUR 100767 OLD HWY 80, HALLSVILLEGASOLINE 10/30/91 2 , 2A E,QCHEROKEE COLUMBUS REAL ESTATE 094112 201 N ALLEN, MARSHALLGASOLINE 11/28/89 2 , 5 E,QCITY OF MARSHALL 099436 1600 STARR ST, MARSHALLGASOLINE, DIESEL 7/2/91 2 , 2A E,QCOASTAL UNILUBE 111748 2204 N LONGVIEW ST, KILGOREDIESEL 7/24/96 1B , 1A E,QCOCA COLA ENTERPRISES INC 091823 405 N WASHINGTON ST, MARSHALLGASOLINE 4/14/88 2 , 4 E,QHAMITER MARY FRANCES 103412 HWY 20, WASKOMGASOLINE 5/20/92 2A , 6 E,Q* HARELTON GROCERY112525 HWY 154, HARELTONGASOLINE, DIESEL 8/5/97 2 , 2A E,QMARSHALL ISD 094912 1205 W EMORY ST, MARSHALLGASOLINE 1/24/90 2 , 2A E,QMARSHALL POTTERY 095279 1308 LAKE, MARSHALLGASOLINE 3/27/90 2 , 2A E,QRALPH WATSON OIL COMPANY 093768 1800 VICTORY DR, MARSHALLGASOLINE 2/1/89 2 , 2A E,QREEVES OIL CO INC 102334 101 MAIN ST, HALLSVILLEGASOLINE 3/19/92 2 , 2A E,QSABINE MINING CO INC 101941 FM 968, HALLSVILLEGASOLINE, DIESEL 2/18/92 2 , 2A E,QSILVERWOOD PROPERTIES INC 111194 IH-20, WASKONGASOLINE 8/6/96 1B , 1A E,QSNIDER INDUSTRIES 107723 LOOP 390, MARSHALLGASOLINE 12/29/93 2A , 1A E,QSNIDER INDUSTRIES 107921 N GROVES, MARSHALLDIESEL 12/7/93 2 , 2A E,QSNIDER INDUSTRIES INC 111765 N GROVE, MARSHALLGASOLINE, DIESEL 9/30/96 2 , 2A E,QSTAGGERS OIL 107956 101 E END BLVD S, MARSHALLGASOLINE 3/16/94 2 , 2A E,QSTAGGERS OIL CO 100527 2602 W GRAND, MARSHALLDIESEL 8/13/91 2 , 2A E,QTOTAL PETROLEUM INC 108336 100 E END BLVD, MARSHALLGASOLINE 3/8/94 2 , 2A E,QTRUMAN ARNOLD COMPANIES 094190 5803 E END BLVD, MARSHALLGASOLINE 6/3/89 2 , 2A E,QTXDOT 097051 N HWY 59, MARSHALLGASOLINE, DIESEL, DIST F OIL 10/16/90 2 , 2A E,QV. J. MAYBERRY 092307 101 E END BLVD, MARSHALLGASOLINE 11/18/88 2 , 2A E,QWOOD MICHAEL L. 102208 907 E END BLVD, MARSHALLGASOLINE 3/11/92 2 , 2A E,QTNRCC - 98

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HASKELLPSTHAYSWQDPCD/ENFPCD/SUPPST* CLEATUS DRINNON112616 503 N 1ST, HASKELLUNKNOWN 9/15/97 5B , 1A E,QDRINNON CLEATUS W 106814 605 N 1ST, HASKELLGASOLINE 5/20/93 5B , 1A E,QHASKELL ISD 096693 605 N AVE G, HASKELLGASOLINE 8/20/90 2A , 6 E,QHASKELL NATIONAL BANK 100381 HWY 277, HASKELLDIESEL 9/23/91 2 , 2A E,QPENMAN CONOCO SERVICE 097955 201 N AVE E, HASKELLGASOLINE, DIESEL 2/5/91 2 , 2A E,QPRODUCERS GRAIN & SUPPLY 096006 MAIN AND CAROTHERS ST, ROCHESTERUNKNOWN 8/1/90 5B , 1A E,QRULE INDEPENDENT SCHOOL DIST 093765 1100 UNION AVE, RULEGASOLINE 8/24/89 2A , 1A E,QSAV M CONVENIENCE STORES 111266 400 E AVENUE, HASKELLGASOLINE 6/26/96 2 , 2A E,QSORRELLS TEXACO 094996 502 UNION, RULEGASOLINE 1/25/90 5B , 1A E,Q* STRICKLAND BRIDGE, INC.112133 S HWY 277, HASKELLDIESEL, GASOLINE 2/17/97 2 , 6 E,QSWAFFORD JOE 100123 HWY 283, SAGERTONGASOLINE 8/26/91 5B , 1A E,QUNKNOWN 095382 4TH, HASKELLGASOLINE 3/30/90 1B , 1A E,QTDA PESTICIDE SURVEY 2147407 WELL NO. 21-47-407 (SAMPLES REP 1 & REP 2) ATRAZINE 6/3/87 2D , 2B E,Q,V,2"HASKELL 5"TDA PESTICIDE SURVEY 2150650 WELL NO. 21-50-650 (SAMPLE REP 1) "HASKELL 2" DICAMBA 6/3/87 2D , 1 V,2,3CHUCK NASH F0011 SAN MARCOS PCE PLUMEBTEX,MTBE,CHLOR SOLVENTS 12/1/89 2D , 2 EGARY JOB CORPS 1161630644 1 MILE N.E. OF SAN MARCOS ON EAST SIDE OF DICHLOROETHANE 1B , 0 EHWY. 21* ACTION PETROLEUM108946 N RR 12, WIMBERLEYDIESEL 12/15/94 2 , 2A E,QAQUARENA SPRINGS RESORT 106907 BERT BROWN RD, SAN MARCOSGASOLINE 6/24/93 2 , 5 E,QBONNET RESOURCES CORP 108018 238 N LYNDON B JOHNSON DR, SAN MARCOS UNKNOWN 7/15/96 2 , 6 E,QCARSON W C 098383 IH--35, SAN MARCOSGASOLINE 3/11/91 2 , 2A E,Q* CIRCLE K STORE INC112394 731 BUGG LN, SAN MARCOSGASOLINE 6/16/97 1B , 1A E,QCITY OF SAN MARCOS 092680 630 E HOPKINS, SAN MARCOSGASOLINE 2/22/89 2 , 4 E,QISMAIL, DEAN 094328 1611 IH-35, SAN MARCOSUNKNOWN 5/21/87 1B , 1A E,QLACKEY & SONS OIL CO. 091384 N IH--35, SAN MARCOSGASOLINE 7/10/86 2 , 6 E,Q* PAC N SAC STORES112105 1503 POST RD, SAN MARCOSGASOLINE 3/11/96 2 , 2A E,Q* PHILLIPS PETROLEUM CO111019 IH-35, SAN MARCOSGASOLINE, DIESEL 5/16/96 2 , 2A E,QPHILLIPS PETROLEUM CO 111020 1439 IH-35, SAN MARCOSGASOLINE 5/16/96 2 , 2A E,QR T STOREY ESTATE 093266 205 W HOPKINS, SAN MARCOSGASOLINE 7/10/89 2A , 2A E,QR T STOREY ESTATE 094978 1903 IH--35, SAN MARCOSGASOLINE 1/24/90 2A , 6 E,Q* R. T. STOREY109872 1303 S IH-35, SAN MARCOSGASOLINE 5/13/93 1B , 1A E,QROGER SMITH 109021 336 W HOPKINS, SAN MARCOSGASOLINE 1/6/95 5B , 1A E,QSAC N PAC STORES INC 108601 CENTER PT RD, SAN MARCOSDIESEL 4/18/94 2 , 2A E,Q* SAC N PAC STORES INC111419 1618 LOOP 82, SAN MARCOSUNKNOWN 7/30/96 2 , 2A E,QSOUTHWEST TEXAS STATE UNIV 108217 601 UNIVERSITY DR, SAN MARCOSGASOLINE 5/26/94 2 , 4 E,QSOUTHWEST TEXAS STATE UNIV 109831 602 MOORE ST, SAN MARCOSDIESEL 8/29/95 2A , 2A E,QSTAR ENTERPRISE 104681 204 N IH--35, SAN MARCOSUNKNOWN 9/16/92 2 , 2A E,QSUPER SHOP INC 103475 1525 LOOP 82, SAN MARCOSUNKNOWN 6/28/92 2 , 6 E,QUNKNOWN 091316 BLANCO, SAN MARCOSUNKNOWN 4/1/85 5B , 4 E,QTNRCC - 99

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HAYSWQDCITY OF KYLE MUNICIPAL SUPPLY WELLS CITY OF KYLE, HAYS COUNTY, "SAN MARCOSTRIHALOMETHANES 3/1/89 2D , 2B E,Q,V,1,2NORTH" 7 1/2 MINUTE USGS TOPOGRAPHIC SHEETSAN MARCOS TRACE ORGANICSCITY OF SAN MARCOS, HAYS COUNTY, "SANMARCOS NORTH" AND "SAN MARCOS SOUTH" USGSTOPOGRAPHIC SHEETSTRIHALOMETHANES,CHLORINATED HYDROCARBON1/1/87 2D , 2B E,Q,V,1,2USGS FREON PLUME STUDY 1 WELL (68-09-111) AND 1 SPRING (68-01-801) IN CCL3F (FREON) 6/3/76 1 , 2B Q,V,2,3HAYS COUNTYHEMPHILLPSTHENDERSONPCD/CAPCD/SUPPSTALLSUP PETROLEUM, INC. 103262 219 N 2ND ST, CANADIANGASOLINE 5/26/92 2 , 2A E,QBOB WARD 109701 1ST ST, CANADIANGASOLINE 9/20/94 2 , 2A E,QCANADIAN FUEL SUPPLY INC 095834 2ND ST, CANADIANGASOLINE 5/8/90 5B , 1A E,QSMALL BUSINESS ADMINISTRATION 096276 217 S 2ND ST, CANADIANGASOLINE 7/23/90 2 , 2A E,QTXDOT 097738 N HWY 60, CANADIANGASOLINE, DIESEL 12/13/90 2 , 2A E,QWARD OIL CO 103943 HWY 60, CANADIANGASOLINE 7/23/92 2A , 6 E,QWARD OIL CO 104495 CANADIAN AIRFIELD, CANADIANGASOLINE 8/24/92 5B , 1A E,QFURON -STRUCTURAL BEARINGS DIV 33134 FM 2495@ PROGRESS WAY, ATHENSVOC 6/24/92 0 , 5 E,Q,VHARVEY INDUSTRIES 30069 INTERSECTION OF HWY 1616 AND 2495 IN ATHENS MEK, TOLUENE 5/6/86 5B , 2A E,Q,V,2,3* BUSH DEVELOPMENT112131 502 N PRAIREVILLE, ATHENSUNKNOWN 3/3/97 2 , 2A E,QCITY OF GUN BARREL CITY 108942 1810 W MAIN, GUN BARREL CITYGASOLINE 12/12/94 2 , 2A E,Q* COUNTRY FAMILY CORP112810 HWY 31, TRINIDADUNKNOWN 7/15/97 1B , 1A E,QCROUCH ENVIRONMENTAL SERVICES 092080 700 S HWY 59, CROSS ROADSGASOLINE 7/12/88 2 , 2A E,QDRAKE NANNY 095870 HWY 31, MALAKOFFGASOLINE 6/15/90 2 , 2A E,QELDER CHRYSLER PLYMOUTH DODGE 102921 1798 E HWY 31, ATHENSGASOLINE 4/23/92 2A , 1A E,QFDIC 099304 E HWY 31, MALAKOFFGASOLINE, DIESEL 6/17/91 2 , 2A E,QJOE TARRANT OIL CO 093593 E HWY 175, EUSTACEGASOLINE 9/6/89 5B , 2A E,QKIDD JONES OIL COMPANY 103132 HWY 334, SEVEN POINTSGASOLINE, DIESEL 5/20/92 2 , 2A E,QKOON KREEK KLUB 097169 S HWY 19, ATHENSGASOLINE 10/24/90 2 , 6 E,QLAMESA BRADLEY 108973 HWY 31, TRINIDADDIESEL 10/26/94 2A , 6 E,QLEO JONES OIL CO 103687 HWY 175, EUSTACEGASOLINE 7/2/92 2 , 2A E,QLEO JONES OIL CO 105424 HWY 175, ATHENSGASOLINE 11/30/92 2 , 2A E,QONE STOP FOOD STORES 111841 HWY 334, SEVEN POINTSGASOLINE 10/3/96 2 , 2A E,QRAY ROBERTS 104348 E HWY 334, SEVEN POINTSGASOLINE 8/24/92 2 , 2A E,QS 3 INC DBA FOOD FAST 108047 101 N GUN BARREL LN, GUN BARREL CITYGASOLINE, DIESEL 4/12/94 2 , 2A E,QS O WYLIE 106181 716 E CORSICANA, ATHENSGASOLINE 2/15/93 1B , 1A E,Q* SMITH & COFFMAN INC112231 510 S PALESTINE, ATHENSUNKNOWN 4/14/97 1B , 1A E,QSWITZER PETROLEUM PRODUCTS 111840 HWY 274, TOOLGASOLINE, DIESEL 10/3/96 2 , 2A E,QSWITZER PETROLEUM PRODUCTS CO 099207 HWY 334, GUN BARREL CITYGASOLINE, DIESEL 5/30/91 2A , 1A E,QTEXAS PARKS & WILDLIFE DEPT 109978 RT 1, EUSTACEGASOLINE 7/15/95 2 , 6 E,QTRIPLE A OIL CO INC 093140 KICKAPOO, BROWNSBOROGASOLINE 6/6/89 2 , 2A E,QTRIPLE A OIL CO INC 097109 216 S PALESTINE, ATHENSGASOLINE, DIESEL 10/11/90 2 , 2A E,QTRIPLE A OIL CO INC 099334 103 W ROYAL BLVD, MALAKOFFGASOLINE, DIESEL, WASTE OIL 6/24/91 2 , 2A E,QTNRCC - 100

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HIDALGOENF/WSTMSWPCD/CAPCD/SUPPCD/VCPSTDOWELL SCHLUMBERGER - MISSION 33568 INT. OF US HWY 83 & GLASSCOCK RD, MISSION VOCS, TPH 4/8/89 3B , 2A EQV2PHARR PLANTATION (PLANTATION SOUTH) 52175 APPROX 1 MI SOUTH PHARR ON HWY 281, PHARR PESTICIDES 6/23/92 3B , 1A EQV1REPUBLIC/C&T LANDFILL OF EDINBURG: MW-4,8, AND 14MSW00151ON S SIDE OF FM 1017, 4.0 MI. W OF INT. OF US 281AND FM 1017, NW OF EDINBURG.VOCs (TCE, METHYLENECHLORIDE)2/13/95 2B , 3 E,Q,V,2MISSOURI PACIFIC RR CO. - MCALLEN 83089 MCALLENPETROLEUM HYDROCARBONS 1/1/91 0 , 2 EMUNOZ BORROW PITS STATE SUPERFUND SITE 1/4 MILE SOUTH OF HWY.83 ON FM 1016PESTICIDES 4/30/90 5B , 5 E,Q,V,1,2,3ANGLO IRON AND METAL COMPANY - MCALLEN 196 2 SOUTH 21ST STREET, MCALLENTPH, TOTAL METALS, PCB 3/7/96 0 , 2 EANGLO IRON AND METAL COMPANY - SAN JUAN 194 426 WYOMING STREET, SAN JUANTPH, METALS 3/7/96 0 , 2 EANGLO IRON AND METAL COMPANY - SAN JUAN 195 426 WYOMING STREET, SAN JUANTPH, METALS 3/7/96 0 , 2 EKNAPP-SHERRILL DONNA - TAORMINA SITE 360 307 SOUTH 12TH STREET, DONNABETX, TPH, METALS 9/27/96 0 , 2 E* A C CUELLAR JR111237 204 W TORRITOS, WESLACOGASOLINE 6/1/96 2 , 2A E,QAUTO ZONE 092713 307 E HWY 83, WESLACOGASOLINE 3/2/89 2 , 2A E,QBARBEE-NEUHAUS IMPLEMENT CO 100885 2000 E EXPWY 83, WESLACOGASOLINE 10/30/91 2 , 6 E,QBENITO HERNANDEZ 097528 S HWY 281, PHARRGASOLINE 12/14/90 1B , 1A E,Q* BERMEA CHEVRON112558 504 LINCOLN DR, SAN JUANGASOLINE 8/21/97 1B , 1A E,QBERT OGDEN OLDS & NISSAN 106365 721 N JACKSON, MCALLENGASOLINE 3/23/93 2 , 2A E,QBILL HEAD ENTERPRISE 095765 2705 N CAGE, PHARRDIESEL 4/23/90 2A , 2A E,QBORDEN INC 093244 1001 W HWY 83, ALAMOGASOLINE 7/11/89 2 , 2A E,QCANTRELL OIL CO 098397 HWY 83, MERCEDESGASOLINE 3/21/91 2 , 2A E,QCANTRELL OIL CO 106807 124 E HWY 83, MCALLENGASOLINE 6/14/93 2 , 6 E,QCANTRELL OIL CO 107016 HWY 83, WESLACOGASOLINE 7/21/93 2 , 2A E,Q* CANTRELL OIL CO107263 1 MILE NORTH TAYLOR, MCALLENGASOLINE 9/23/93 2 , 2A E,QCANTRELL OIL CO 107833 131 NORTH BLVD, DONNAGASOLINE 2/24/94 2 , 2A E,Q* CANTRELL OIL CO108491 611 HOOKS AVE, DONNAGASOLINE 8/12/94 2 , 2A E,Q* CANTRELL OIL CO109852 623 N AIRPORT DR, WESLACOGASOLINE 9/1/95 2 , 2A E,QCAYETEANO BARRERA 107768 2101 NOLANA LOOP, MCALLENOTHER 2/2/94 2 , 6 E,QCINCO HERMANOS INC 095292 902 6TH ST, WESLACOGASOLINE 3/25/90 2 , 2A E,QCIRCLE K CORP 105448 402 E HWY 83, MISSIONGASOLINE 12/4/92 2 , 2A E,QCITY OF MCALLEN 103649 200 S MAIN ST, MCALLENGASOLINE, DIESEL 6/16/92 2 , 2A E,QCITY OF WESLACO 097546 500 S KANSAS, WESLACOGASOLINE 12/17/90 2 , 2A E,QCOASTAL 098464 712 S CAGE ST, PHARRGASOLINE 4/4/91 2 , 2A E,QCOASTAL MAVERICK 092362 328 E HWY 83, PHARRGASOLINE 12/8/88 2 , 6 E,QCOASTAL MAVERICK 092509 901 HWY 83, WESLACOGASOLINE 1/24/89 2 , 4 E,QCOASTAL MAVERICK 093494 1225 N 23RD ST, MCALLENGASOLINE 7/18/89 2 , 2A E,QCOASTAL MAVERICK 093613 311 S CONWAY, MISSIONGASOLINE 7/24/89 2 , 2A E,QCOASTAL MAVERICK 093614 401 E COMA AVE, HIDALGOGASOLINE 7/24/89 2 , 3 E,QCOASTAL MAVERICK 098396 801 N CLOSNER, EDINBURGGASOLINE 3/27/91 2 , 2A E,QCOASTAL MAVERICK 098401 W HWY 83, WESLACOGASOLINE 4/4/91 2 , 2A E,QCOASTAL MAVERICK 098443 100 W HWY 83, SAN JUANGASOLINE 4/4/91 2 , 2A E,QCOASTAL MAVERICK 098457 803 S BRIDGE ST, WESLACOGASOLINE 4/4/91 2A , 1A E,QCOASTAL MAVERICK 098468 721 N CLOSNER, EDINBURGGASOLINE 4/4/91 2 , 2A E,QTNRCC - 101

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HIDALGOPSTCOASTAL MAVERICK 098469 4820 S 23RD ST, MCALLENGASOLINE 4/4/91 2 , 2A E,QCOASTAL MAVERICK 098472 200 E HWY 83, MCALLENGASOLINE 4/4/91 2 , 4 E,QDILLARD BILL 102834 2910 N CLOSNER, EDINBURGGASOLINE, DIESEL 4/29/92 2 , 2A E,QDISCOUNT OILS,LUBES&FUELS INC. 097737 12 N BIRCH, PHARRGASOLINE 12/24/90 1B , 1A E,QDONNA IRRIGATION DISTRICT 110115 S FM 1423, DONNAGASOLINE 11/22/95 2 , 2A E,QDOWELL SCHLUMBERGER INC 093043 HWY 83, MISSIONDIESEL 6/2/89 2 , 4 E,Q* EDCOUCH ELSA ISD111767 FM 1015, EDCOUCHGASOLINE 8/12/96 2 , 2A E,Q* EDINBURG AUTO/TRUCK STOP093623 HWY 281, EDINBURGGASOLINE 9/12/89 2 , 2A E,QEDINBURG CISD 096621 921 E SCHUNIOR, EDINBURGGASOLINE 7/1/81 2 , 6 E,QERNIE MUNOZ 107428 101 HWY 83, SAN JUANGASOLINE 10/12/93 5B , 1A E,QESPARZA LUIS 099444 E EXPWY 83, WESLACOGASOLINE 7/10/91 2 , 4 E,QESTEBAN PEDRAZA 095770 1101 S AVENUE, DONNAGASOLINE 6/8/90 2 , 2A E,QEXXON COMPANY USA 099548 921 W HWY 83, MCALLENGASOLINE 6/21/91 2 , 2A E,QF. P. PHILLIPS, JR. INC. 101689 810 W HOOKS, DONNAGASOLINE 7/23/91 2 , 6 E,QFCLT REO TWO, L.P. 111132 2218 FOX DR, MCALLENGASOLINE, DIESEL 5/30/96 2 , 6 E,Q* FEDERICO PALACIOS110326 2527 S HWY 281, EDINBURGUNKNOWN 3/19/96 2 , 2A E,Q* FFP OPERATING PARTNERS092329 1603 W UNIVERSITY DR, EDINBURGGASOLINE 12/1/88 2 , 5 E,QFFP OPERATING PARTNERS 095410 4600 S 23RD ST, MCALLENGASOLINE 5/7/90 2 , 2A E,QFFP OPERATING PARTNERS 097559 S HWY 281, PHARRGASOLINE 12/18/90 2 , 2A E,QFFP OPERATING PARTNERS 106375 701 ALAMO RD, ALAMOGASOLINE 3/26/93 2 , 2A E,QFFP OPERATING PARTNERS 106812 LEO AVE, LA JOYAGASOLINE 6/17/93 2A , 1A E,Q* FFP OPERATING PARTNERS112123 621 N CLOSNER, EDINBURGGASOLINE 1/31/97 2 , 2A E,Q* FFP OPERATING PARTNERS112124 1029 W HWY 83, ALAMOGASOLINE 2/1/97 2 , 2A E,Q* FFP OPERATING PARTNERS112142 1901 LISSNER AVE, DONNAGASOLINE 10/18/95 2 , 2A E,Q* FIDEL PEREZ110156 201 N CLOSNER, EDINBURGDIESEL 12/1/95 2 , 2A E,Q* FINEK, L.L.P.110157 2401 S JACKSON RD #56, PHARRGASOLINE 10/30/95 2 , 2A E,QFIRST NATIONAL BANK EDINBURG 110970 524 S BRIDGE ST, HIDALGOGASOLINE 2/2/96 2 , 2A E,QFISCA OIL CO INC 095023 700 S CLOSNER, EDINBURGGASOLINE 3/5/90 2A , 1A E,QFLEMING CO INC 109929 2111 HESTER ST, DONNAGASOLINE, DIESEL 8/4/95 2 , 6 E,QFOODMAKER INC 107734 1520 N 10TH ST, MCALLENGASOLINE 7/15/93 2 , 2A E,QFOX KENNETH SUPPLY CO 099003 2200 FOX RD, MCALLENGASOLINE, CHEMICAL 5/15/91 2A , 6 E,QHELDT BROS TRUCKING-BANKRUPTCY 100884 N HWY 281, EDINBURGDIESEL 11/15/91 1B , 1A E,QHI JO HYDROCARBONS 104398 E FM 1926, EDINBURGGASOLINE 8/26/92 2 , 2A E,QHICKS OIL & BUTANE CO 107625 106 S AIRPORT DR, WESLACOGASOLINE 12/22/93 2 , 2A E,QHIDALGO CITY INVESTMENTS INC 095948 1301 N 23RD ST, MCALLENGASOLINE 6/22/90 2 , 3 E,QHIDALGO CITY INVESTMENTS INC 102271 ESPERANZA, HIDALGOGASOLINE 3/20/92 2 , 2A E,QHIDALGO COUNTY IRRIGATION 103556 4TH, SAN JUANGASOLINE 6/9/92 2 , 5 E,QHILDALGO COUNTY 101441 301 E STATE ST, PHARRGASOLINE 9/5/91 2 , 2A E,QHOLLON OIL CO 104830 906 N WESTGATE, WESLACOGASOLINE 10/5/92 2 , 6 E,Q* HOLLON OIL CO111983 N I9 RD, SAN JUANUNKNOWN 8/5/96 1B , 1A E,Q* HOLLON OIL CO111984 502 E EDINBURG, ELSAUNKNOWN 8/26/96 1B , 1A E,QHORACIO AGUIRRE 097177 401 E HWY 83, WESLACOGASOLINE 10/3/90 1B , 1A E,QINTER NATIONAL BANK OF MCALLEN 093587 1700 S 10TH ST, MCALLENGASOLINE 8/28/89 2 , 3 E,QJ & E OIL CO 109107 200 W EDINBURG, ELSAGASOLINE 2/6/95 1B , 1A E,Q* J & E OIL CO112671 S HWY 281, PHARRGASOLINE 9/26/97 1B , 1A E,Q* J & E OIL CO112672 S I RD, EDINBURGGASOLINE 9/26/97 1B , 1A E,Q* J & E OIL CO112673 300 E HWY 107, ELSAGASOLINE 9/26/97 1B , 1A E,Q* J & E OIL CO112674 4200 S 23RD ST, MCALLENGASOLINE 9/26/97 1B , 1A E,QTNRCC - 102

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HIDALGOPST* J & E OIL CO112675 3501 S SUGAR RD, EDINBURGGASOLINE 9/26/97 1B , 1A E,QJ & E OIL CO INC 097855 1015 W MONTE CHRISTO RD, EDINBURGGASOLINE 1/29/91 2 , 6 E,QJ & E OIL CO INC 098759 2504 N BRIDGE, WESLACOGASOLINE 4/26/91 5B , 1A E,Q* J & E OIL COMPANY112830 4 1/2 MI W EXP 183, MISSIONUNKNOWN 12/10/97 1B , 1A E,QJ & E OIL INC 097454 6001 N 23RD ST, MCALLENGASOLINE 12/7/90 2 , 2A E,QJ & E OIL INC 104405 HWY 83, LA JOYAGASOLINE 9/9/92 2 , 2A E,QJOE VERA 103671 411 N CAGE, PHARRGASOLINE 6/30/92 2 , 6 E,QJOSE A CERDA 108604 W GLASSCOCK, MISSIONGASOLINE 8/9/94 2A , 1A E,QJOSEPH PHILLIPS 111155 1600 W HWY 83, MISSIONGASOLINE 6/11/96 2A , 6 E,QJOSEPH PHILLIPS 111156 N 10TH, MCALLENGASOLINE 6/11/96 2 , 6 E,QJOSEPH PHILLIPS 111157 W EXPWY 83, LA JOYAGASOLINE 6/11/96 2 , 2A E,QJOSEPH PHILLIPS 111159 SUGAR RD, PHARRGASOLINE 6/11/96 2 , 2A E,QJOSEPH PHILLIPS 111160 VERMONT AVE, MERCEDESGASOLINE 6/11/96 2 , 2A E,QJOSEPH PHILLIPS 111161 FM 107, MISSIONGASOLINE 6/11/96 2A , 6 E,QJOSEPH PHILLIPS 111162 2701 W HWY 83, MCALLENGASOLINE 6/11/96 1B , 1A E,QJOSEPH PHILLIPS 111165 809 N CAGE, PHARRGASOLINE 6/11/96 2 , 2A E,QJOSEPH PHILLIPS 111166 BUS HWY 83, LA JOYAGASOLINE 6/11/96 2 , 2A E,QKLINCKGLOBE, WALGREENS, GLOBAL 099386 901 S 10TH ST, MCALLENGASOLINE 7/2/91 2 , 2A E,QLEO J LEO JR 108852 FM 495, PALMVIEWGASOLINE 9/13/94 1B , 1A E,QLINK INVESTMENTS LTD 110777 109 W HWY 83, MCALLENGASOLINE 3/21/96 2 , 2A E,QMARK V. RICHARDS 099816 1516 BEECH AVE, MCALLENDIESEL 8/8/91 2 , 2A E,QMCALLEN AVIATION SERVICES INC 092923 2812 S 10TH ST, MCALLENJET FUEL 5/2/89 2 , 4 E,Q* MCALLEN METRO INVESTMENTS109505 1621 W SAM HOUSTON, PHARRGASOLINE 3/20/95 2 , 2A E,QMERCEDES METRO INVESTMENT INC 100544 502 2ND ST, MERCEDESGASOLINE, DIESEL 10/17/91 2 , 2A E,QMISSION HOSPITAL 108596 900 S BRYAN RD, MISSIONDIESEL 7/28/94 2 , 3 E,QMONTES JOSIE (ABEL) 103228 FM 1015, WESLACOGASOLINE 5/27/92 2A , 1A E,Q* NOE MALDONADO109267 110 W EDINBURG, ELSAGASOLINE 1/19/95 2 , 2A E,QOSCAR GARCIA 091610 530 S BRIDGE ST, WESLACOGASOLINE 1/11/88 2 , 2A E,QPHILLIPS PROPERTIES 110122 2502 W HWY 83, MISSIONGASOLINE 11/30/95 2 , 2A E,QPHILLIPS PROPERTIES INC 091916 2330 N 10TH, MCALLENGASOLINE 5/23/88 2A , 6 E,QPHILLIPS PROPERTIES INC 093150 EXPWY 83, MISSIONGASOLINE 6/12/89 2 , 6 E,QPHILLIPS PROPERTIES INC 093780 200 N MAIN, MCALLENGASOLINE 10/11/89 2 , 6 E,QPHILLIPS PROPERTIES INC 095621 1015 W MONTE CRISTOL RD, EDINBURGDIESEL 5/22/90 2A , 6 E,QPHILLIPS PROPERTIES INC 097396 N I RD, SAN JUANGASOLINE 11/30/90 2 , 2A E,QPHILLIPS PROPERTIES INC 097875 FM 336, EDINBURGGASOLINE 1/28/91 2A , 6 E,QPHILLIPS PROPERTIES INC 106829 HWY 107, EDCOUCHGASOLINE 6/18/92 2A , 6 E,Q* PHILLIPS PROPERTIES INC107437 1901 N 10TH, MCALLENGASOLINE 11/4/93 2A , 1A E,Q* PHILLIPS PROPERTIES INC109427 1520 S WARE RD, MCALLENGASOLINE 5/1/95 2 , 2A E,QPHILLIPS PROPERTIES INC 110284 324 BRIDGE ST, HIDALGOGASOLINE 1/10/96 2 , 2A E,QPHILLIPS PROPERTIES INC 110888 1001 W HWY 83, MCALLENGASOLINE 4/17/96 2 , 2A E,QPHILLIPS PROPERTIES INC 110890 101 W SANTA ROSA AVE, EDCOUCHGASOLINE 4/29/96 2A , 6 E,QPIONEER HI-BRED INTERNATIONAL 103071 812 N INTERNATIONAL BLVD, WESLACOGASOLINE 2/18/92 2 , 2A E,QQ C ENERGY L C 095853 1000 N CAGE ST, PHARRUNKNOWN 6/14/90 2A , 6 E,QQ. C. ENERGY, L.C. 103058 1020 E UNIVERSITY, EDINBURGGASOLINE 4/23/92 2 , 2A E,QR W JONES WHOLESALE 093943 HWY 281, RELAMPAGOGASOLINE 11/14/89 2 , 2A E,QRAMIREZ RUDY 106644 2121 N 10TH, MCALLENGASOLINE 5/17/93 2 , 2A E,QRAMSHORST J V 100463 10TH ST, MCALLENGASOLINE 9/30/91 2 , 2A E,QRICKY IVEY 097344 724 N TEXAS, WESLACOGASOLINE 11/26/90 2 , 2A E,QTNRCC - 103

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HIDALGOPSTHILLPSTHOCKLEYPCD/SUPPSTRIOS RAUL 102532 202 N CLOSNER, EDINBURGGASOLINE 8/28/91 2 , 6 E,QSO TX WILDHORSE DESERT INT INC 110974 217 N CLOSNER, EDINBURGWASTE OIL, GASOLINE 5/7/96 2A , 6 E,Q* SOUTH TEXAS WILDHORSE DESERT109997 320 W UNIVERSITY, EDINBURGGASOLINE, DIESEL 10/10/95 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 101521 1181 FREDDY GONZALES DR, EDINBURGGASOLINE 1/16/92 2 , 6 E,QSSP PARTNERS 096989 1816 S 10TH ST, MCALLENGASOLINE 10/18/90 2 , 2A E,QSSP PARTNERS 099547 721 N MCCOLL, MCALLENGASOLINE 7/3/91 2 , 2A E,QSSP PARTNERS 102906 2800-A N 10TH ST, MCALLENGASOLINE 6/28/91 2 , 2A E,QSSP PARTNERS 104315 621 E NOLANA, MCALLENGASOLINE 7/12/90 2 , 6 E,QSSP PARTNERS 107223 602 N 1ST ST, HARLINGENGASOLINE 9/14/93 2 , 2A E,Q* SSP PARTNERS110614 802 W UNIVERSITY, EDINBURGUNKNOWN 1/25/96 2 , 2A E,QSSP PARTNERS 110615 904A N TEXAS BLVD, WESLACOUNKNOWN 1/25/96 2A , 1A E,QSSP PARTNERS 110616 711 N NEBRASKA, SAN JUANUNKNOWN 1/25/96 2 , 2A E,QSSP PARTNERS 110617 3620 TULIP, MCALLENUNKNOWN 1/23/96 2 , 5 E,QSSP PARTNERS 110618 1611 S CLOSNER, EDINBURGUNKNOWN 12/21/95 2A , 6 E,Q* SSP PARTNERS110622 1100 N CAGE, PHARRUNKNOWN 12/21/95 2 , 2A E,QSSP PARTNERS 110626 1622 N 23RD, MCALLENUNKNOWN 12/21/95 2A , 1A E,QSSP PARTNERS 110883 602 N 2ND ST, MERCEDESGASOLINE 4/1/96 2 , 2A E,QSSP PARTNERS 110884 1021 S 23RD ST, MCALLENGASOLINE 4/1/96 2 , 6 E,QSSP PARTNERS 110885 3620 W PECAN, MCALLENGASOLINE 4/1/96 2 , 6 E,QSSP PARTNERS 110886 720 BICENTENNIAL, MCALLENGASOLINE 4/1/96 1B , 1A E,Q* SSP PARTNERS111693 4824 N 10TH ST, WISTERIAGASOLINE 12/8/95 2 , 2A E,QTXDOT 101737 HWY 107, EDCOUCHGASOLINE 2/10/92 2A , 6 E,QU.S.D.A., ARS, SARL 095592 2301 S INTERNATIONAL, WESLACOGASOLINE 5/8/90 2 , 6 E,QUNITED BRAND 104115 217 N OHIO, MERCEDESGASOLINE 8/4/92 2 , 2A E,QUNIVERSITY OF TX-PAN AMERICAN 104497 501 N SUGAR RD, EDINBURGGASOLINE 9/11/92 2 , 6 E,QUS IMMIGRATION& NATURALIZATION 107159 2301 S MAIN ST, MCALLENGASOLINE 8/24/93 2 , 2A E,Q* VALLEY SHAMROCK111901 2220 E HWY 83, MISSIONGASOLINE 11/13/96 1B , 1A E,Q* VALLEY SHAMROCK111902 1813 HWY 83, DONNAGASOLINE 11/13/96 1B , 1A E,QVALLEY SHAMROCK 111903 701 S CAGE BLVD, PHARRGASOLINE 11/14/96 1B , 1A E,QVALLEY SHAMROCK 111904 601 E HWY 83, ALAMOGASOLINE 11/8/96 2 , 2A E,QVALLEY SHAMROCK INC 098371 600 E HWY 83, WESLACOGASOLINE, WASTE OIL 3/18/91 2 , 2A E,QVALLEY SHAMROCK INC 100509 1900 N 10TH ST, MCALLENGASOLINE 10/10/91 2 , 2A E,Q* VALLEY SHAMROCK INC109395 800 S 10TH ST, MCALLENGASOLINE 3/20/95 2 , 2A E,Q* VALLEY STAR INC111779 702 N TEXAS ST, WESLACOGASOLINE 10/16/96 2 , 2A E,QWALTER KELLER DISTRIBUTORS 098334 1701 S 10TH ST, MCALLENGASOLINE 3/22/91 2 , 3 E,QWESLACO METRO INVESTMENTS, INC 093216 119 W EXPWY 83, WESLACODIESEL 7/6/89 2A , 6 E,QCIRCLE K CORP 092626 200 S WACO ST, HILLSBOROGASOLINE 5/11/88 2 , 4 E,QPETROLEUM WHOLESALE INC 094745 IH 35, HILLSBOROGASOLINE 2/1/90 1B , 1A E,QUNKNOWN 102484 HWY 56, WHITNEYGASOLINE 4/1/92 2A , 1A E,QMOTOR FUELS HWY 114, APPROXIMATELY 2 MILES WEST OF BENZENE 4/17/91 3D , 1A E,Q,V,1,2,3LEVELLANDC B CANON 110100 903 S SLAUGHTER, SUNDOWNGASOLINE 11/27/95 5B , 1A E,QTNRCC - 104

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HOCKLEYPSTHOODWUDPSTHOPKINSPCD/CAPSTC B CANON 110101 911 S SLAUGHTER, SUNDOWNGASOLINE 11/27/95 5B , 1A E,QCITIZENS BANK 110245 700 S COLLEGE, LEVELLANDGASOLINE 12/29/95 2 , 2A E,QCITY OF LEVELLAND 106552 302 AVE G, LEVELLANDGASOLINE, WASTE OIL 4/29/93 2A , 6 E,Q* G & C CONTRACTING107270 501 N COLLEGE, LEVELLANDGASOLINE 9/14/93 2 , 2A E,QHOMER JOHNSON OIL & BUTANE 094303 HWY 114, SMYERGASOLINE 12/4/89 2 , 2A E,QHOMER JOHNSON OIL & BUTANE 094464 111 COLLEGE AVE, LEVELLANDGASOLINE, DIESEL, WASTE OIL 12/27/89 2 , 2A E,QHOMER JOHNSON OIL CO 110216 AVE Q, LEVELLANDGASOLINE 12/11/95 2 , 2A E,QHORKEY OIL CO 109042 HWY 597 HWY 84, ANTONGASOLINE, DIESEL 1/16/95 2 , 3 E,QJ. KELLY PARTNERSHIP 107886 701 COLLEGE AVE, LEVELLANDGASOLINE 2/23/94 2 , 2A E,QMCCLAIN OIL INC 111877 1210 AVE H, LEVELLANDGASOLINE 11/5/96 1B , 1A E,QMCLAIN OIL CO 111550 901 COLLEGE AVE, LEVELLANDGASOLINE 8/5/96 1B , 1A E,QPALMER BROTHERS 098293 300 COLLEGE AVE, LEVELLANDGASOLINE 3/14/91 2 , 2A E,QPAUL MUSSLEWHITE TRUCKING CO 094492 1700 10TH ST, LEVELLANDGASOLINE 12/22/89 2 , 2A E,QPETRO PRODUCTS CORP 100742 301 COLLEGE AVE, LEVELLANDGASOLINE 10/23/91 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 099733 HWY 62-82, ROPESVILLEGASOLINE 7/31/91 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 105549 801 SLAUGHTER, SUNDOWNGASOLINE 12/2/92 2 , 2A E,QROY REID TIRE CO 094493 908 AVE H, LEVELLANDGASOLINE 11/15/89 2 , 6 E,QSOUTH PLAINS BANK 110041 600 S COLLEGE, LEVELLANDGASOLINE 10/24/95 2 , 2A E,QSOUTH PLAINS COLLEGE 094001 1401 COLLEGE, LEVELLANDGASOLINE 11/7/89 2 , 2A E,QSOUTHWEST EVANS CORPORATION 099544 501 COLLEGE, LEVELLANDGASOLINE 7/10/91 2 , 2A E,QSPADE CO OP ANTON DIVISION 110858 SANTA FE RD, ANTONDIESEL 4/1/96 2A , 6 E,QSTANLEY JAMES 093227 608 WEST AVE, LEVELLANDGASOLINE 6/13/89 2 , 2A E,QTOWNSEND STRONG INC 100124 HWY 84, ROUNDUPDIESEL 8/28/91 2A , 6 E,QUNITED COTTON GROWERS 095282 HWY 385, LEVELLANDGASOLINE 3/29/90 2 , 2A E,QW & T TANK TRUCKS 101149 N SLAUGHTER AVE, SUNDOWNDIESEL 12/5/91 2 , 2A E,QWESTERN MARKETING 110044 212 COLLEGE AVE, LEVELLANDGASOLINE 9/29/95 2A , 1A E,QWESTERN MARKETING INC 103894 212 COLLEGE AVE, LEVELLANDDIESEL 7/15/92 2 , 2A E,QFRIENDS CONVENIENCE STORE #215 1100035 (G1100035A) - NW CORNER OF US HWY 84 AND TX BTEX, METHYL-TERT-BUTYLHWY 597ETHER10/6/95 2D , 6 E,Q,V,2* GRANBURY MARINA INC112307 630 E PEARL, GRANBURYUNKNOWN 5/9/97 2 , 2A E,QINGRAM ENTERPRISES 098820 FM 4, GRANBURYDIESEL 4/30/91 2 , 6 E,QKWIK GAS INC 098232 S HWY 144, GRANBURYGASOLINE 2/25/91 5B , 2A E,QLIPAN CONOCO 097324 HWY 4, LIPANGASOLINE, DIESEL 10/18/90 2 , 6 E,QSPENCER DISTRIBUTING 104806 902 E HWY 377, GRANBURYGASOLINE 9/17/92 2 , 2A E,QTXDOT 097784 HWY 144, GRANBURYDIESEL, WASTE OIL, KEROSENE 1/14/91 2A , 6 E,QUNKNOWN 091444 HWY 377, GRANBURYGASOLINE 8/31/87 5B , 2A E,QNORDSTROM VALVE - SULPHUR SPRINGS 30504 1511 JEFFERSON ST., SULPHUR SPRINGSCHLORINATEDSOLVENTS/PETROLEUMCONSTITUE12/1/88 1A , 2A EQV12DANIEL OIL CO 094960 IH-30, CUMBYGASOLINE 2/15/90 2 , 2A E,QE Z MART STORES INC 106422 732 MAIN ST, SULPHUR SPRINGSGASOLINE, DIESEL 3/15/93 2 , 2A E,QTNRCC - 105

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HOPKINSPSTHOUSTONPCD/CAPSTHOWARDENF/WSTIHWPCD/CAPSTEXXON COMPANY USA 096836 1234 BROADWAY, SULPHUR SPRINGSGASOLINE 7/21/90 2 , 2A E,QFFP OPERATING PARTNERS 100450 845 W MAIN, SULPHUR SPRINGSGASOLINE, DIESEL 8/2/88 2 , 2A E,Q* GENICO DISTRIBUTORS-BANKRUPTCY112063 1187 S BROADWAY, SULPHUR SPRINGSGASOLINE 12/11/96 1B , 1A E,QHERRIAGE J W 102620 316 MAIN ST, SULPHUR SPRINGSGASOLINE 4/10/92 5B , 6 E,QMARY BERGIN 101415 405 MAIN ST, SULPHUR SPRINGSGASOLINE 1/3/92 2A , 1A E,QNIBLETT OIL COMPANY 103814 IH--30, SULPHUR SPRINGSGASOLINE, DIESEL, WASTE OIL 7/7/92 2 , 2A E,Q* PEPSI COLA112931 117 W 1ST, COMODIESEL 12/18/97 1B , 1A E,QPOGUE OIL COMPANY 095288 426 W MAIN, SULPHUR SPRINGSGASOLINE 3/22/90 2 , 2A E,QTEXAS DEPT OF PUBLIC SAFETY 097780 1701 E SHANNON RD, SULPHUR SPRINGSGASOLINE 1/2/91 2 , 2A E,QTRUMAN ARNOLD COMPANIES 095277 1237 S BROADWAY, SULPHUR SPRINGSGASOLINE 3/28/90 2A , 6 E,QTXDOT 099801 1141 MAIN ST, SULPHUR SPRINGSUNKNOWN 8/8/91 1B , 1A E,QWALKER-HARRY OIL COMPANY 103022 1201 S BROADWAY, SULPHUR SPRINGSGASOLINE, DIESEL 5/7/92 2 , 2A E,QWASTE MANAGEMENT - DALLAS E 100105 1129 INDUSTRIAL BLVD, SULPHUR SPRINGSDIESEL 9/5/91 2A , 6 E,QWRIGHT FRANK 102159 151 E INDUSTRIAL, SULPHUR SPRINGSGASOLINE 1/31/92 2 , 2A E,QP CHEM, INC 31743 OLD LATEXO RD., LATEXOVOCS 9/25/91 0 , 4 EALSIDMA INC 091836 102 E GOLIAD, CROCKETTGASOLINE 4/4/88 2 , 6 E,QCHRISTIAN JERRY A 099182 FM 1280, AUSTONIOGASOLINE 6/3/91 2 , 2A E,QLACEY HOLLIS INC 092840 301 S 4TH, CROCKETTGASOLINE 4/8/89 1B , 1A E,QLOVELADY STATE BANK 103709 FM 1280, LOVELADYGASOLINE 6/25/92 2A , 1A E,QMINTER BOBBY 097808 609 E GOLIAD, CROCKETTGASOLINE 1/17/91 2 , 6 E,QOKAY FOOD STORES 099084 921 S 4TH ST, CROCKETTGASOLINE, DIESEL 5/15/91 2 , 2A E,QSTOWE LUMBER COMPANY 099258 N HWY 287, GRAPELANDGASOLINE 6/8/91 2 , 2A E,QTEXAS DEPT CRIMINAL JUSTICE 101030 FM 230, LOVELADYGASOLINE, DIESEL 12/2/91 2A , 1A E,QTXDOT 098589 LOOP 304, CROCKETTGASOLINE, DIESEL 4/9/91 2 , 5 E,QFINA OIL & CHEMICAL CO - BIG SPRING 30083 I-20 EAST AND REFINERY ROAD, BIG SPRINGHYDROCARBONS, BENZENE 11/18/86 3B , 3 EFINA PIPELINE CO. 52083 HWY 80 EAST OF COAHOMA, BIG SPRINGGASOLINE 1/1/78 3B , 2A EQV123FINA OIL & CHEMICAL CO - BIG SPRING 30083 I-20 EAST AND REFINERY ROAD, BIG SPRINGHYDROCARBONS, BENZENE 11/18/86 3A , 5 E,Q,V,2,3FINA OIL & CHEMICAL CO - BIG SPRING 30083 I-20 EAST AND REFINERY ROAD, BIG SPRINGHYDROCARBONS, BENZENE 11/18/86 3A , 2,3 E,Q* ACKERLY OIL CO (TRIO FUELS)111531 610 E 4TH, BIG SPRINGGASOLINE 8/22/96 2 , 2A E,QBIG SPRING FUELS 097733 1106 N LAMESA HWY, BIG SPRINGGASOLINE 11/14/90 5B , 1A E,QC X TRANSPORTATION 110700 IH-20, BIG SPRINGUNKNOWN 4/9/96 2A , 1A E,QCITY OF BIG SPRING 091733 WEBB AFB, BIG SPRINGGASOLINE 3/1/88 2 , 2A E,QCITY OF BIG SPRING 104221 911 E 2ND ST, BIG SPRINGGASOLINE 5/15/96 2 , 2A E,Q* CITY OF BIG SPRING112269 AIRPARK, BIG SPRINGGASOLINE, AV-GAS 4/25/97 1B , 1A E,QFDIC C/O AMRESCO MGMT INC 099898 FM 700, BIG SPRINGGASOLINE, DIESEL 8/7/91 2A , 1A E,QGREYHOUND LINES INC 102343 311 E 3RD ST, BIG SPRINGGASOLINE 2/3/92 2 , 2A E,QH W WRIGHT 095250 1610 E 4TH ST, BIG SPRINGGASOLINE 2/26/90 5B , 1A E,QTNRCC - 106

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HOWARDPSTHUNTWQDIHWPCD/CAPCD/SUPPCD/VCPSTHUTCHINSONENF/WSTHARDING G B 103866 214 N 1ST ST, COAHOMAWASTE OIL, GASOLINE, DIESEL 7/14/92 5B , 1A E,QJESS BAILEY 094396 605 E 2ND ST, BIG SPRINGGASOLINE 12/20/89 1B , 1A E,QLLOYD ROBINSON 111525 HWY 846, KNOTTUNKNOWN 10/23/96 5B , 1A E,QPARK'S FUEL INC 098674 303 E 1ST ST, BIG SPRINGGASOLINE 4/17/91 2 , 2A E,QREGAL OIL INC 107202 2501 GREGG ST, BIG SPRINGGASOLINE 8/30/93 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 111380 HWY 87, BIG SPRINGUNKNOWN 7/17/96 2 , 2A E,QSOUTHLAND CORP 101043 401 BIRDWELL LN, BIG SPRINGGASOLINE 11/11/91 2 , 2A E,QSOUTHLAND CORP 106970 300 OWENS, BIG SPRINGGASOLINE 7/22/93 2 , 2A E,QSOUTHWEST CONVENIENT STORE 105998 800 S GREGG, BIG SPRINGGASOLINE 11/5/92 2 , 2A E,QTOMCO-ESTATE OF TOMMY TOMPKINS 098728 500 W 3RD, BIG SPRINGGASOLINE 4/23/91 2A , 1A E,QTXDOT 102675 HWY 350, BIG SPRINGGASOLINE, DIESEL 4/17/92 2 , 6 E,QUNKNOWN 093578 1ST, BIG SPRINGUNKNOWN 6/26/89 2A , 1A E,QWOLFE ESTATE FAMILY TRUST 110919 804 E 3RD ST, BIG SPRINGUNKNOWN 5/16/96 1B , 1A E,QTDA PESTICIDE SURVEY KNOTT AREA #1; 13 WELLS IN HOWARD COUNTY (28- ARSENIC 4/6/88 2D , 1 E,Q,V,235-805, 806, 807, 808, 811, 812, 818, 819, 903, 904, &907; 28-43-204 & 301)TDA PESTICIDE SURVEY 2835906 WELL NO. 28-35-906 (SAMPLE REP 1) "HOWARD 9" BROMACIL, ARSENIC 4/20/88 2D , 1 V,2,3RATHEON E-SYSTEMS 30449 MAJORS FIELD, GREENVILLESOLVENTS 9/13/88 3A , 3,4,5 E,Q,V,2,3E-SYSTEMS 30449 MAJORS FIELD, GREENVILLECHLORINATED SOLVENTS,BENZENE, CADMIUM, ARSENIC9/13/88 3A , 2 E,Q,V,2,3HI-YIELD STATE SUPERFUND SITE NE SIDE OF SOUTHERN PACIFIC R.R., BOUNDED BY ARSENIC 5A , 6 E,Q,V,2,3SYCAMORE, JOHNSON, AND ROSS STS.,COMMERCE, TX.* FORMER FINA "GREENVILLE" TERMINAL #1755 452 I-30 AND FM 1903, CADDO MILLSTPH, VOCS, SVOCS 2/4/97 0 , 2 E* FORMER LIQUID PAPER FACILITY253 1001 ED RUTHERFORD ROAD, GREENVILLECHLORINATED SOLVENTS 5/14/96 0 , 5 E* SHERWOOD MEDICAL592 400 MAPLE STREET, COMMERCEVOCS 8/13/97 0 , 2 EWALKER MCDONALD MANUFACTURING, INC. 245 7101 INTERSTATE HIGHWAY 30, GREENVILLEMETALS, VOCS 4/29/96 0 , 2 ECIRCLE K BANKRUPTCY 097778 6502 WESLEY ST, GREENVILLEGASOLINE 1/14/91 1B , 1A E,QFINA OIL & CHEMICAL CO 092943 LEE ST, GREENVILLEGASOLINE 8/11/89 2A , 6 E,QKENNETH KIDD 109314 HWY 35, LAKE TAWAKONIGASOLINE 3/28/95 5B , 2A E,QPAUL OTTWELL 095860 2127 LEE ST, GREENVILLEGASOLINE 5/29/90 2 , 4 E,Q* PROVIDENT BANK105812 201 W MAIN ST, QUINLANGASOLINE 1/12/92 2 , 2A E,QSTRASBERGER ENTERPRISES, INC. 095957 5001 WESLEY, GREENVILLEGASOLINE 6/4/90 2A , 5 E,Q* TAWAKONI MARINA112565 2201 E RABBIT COVE RD, WEST TAWAKONIGASOLINE 8/25/97 1B , 1A E,QTOTAL PETROLEUM INC 099121 4801 MOULTON, GREENVILLEDIESEL 4/21/91 2 , 6 E,QCOMINCO AMERICAN, INC. - BORGER 30770 FM 1551, N OF BORGERARSENIC 3/22/93 3B , 5 EQV1DOWELL SCHLUMBERGER - BORGER 33597 424 LOCUST STREET,BORGERTPH, VOCS 11/9/88 3B , 2A EQV2TNRCC - 107

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236HUTCHINSONENF/WSTHarrisHaysJACKIHWPCD/CAPSTENF/WSTPSTPSTJACKSONPSTJASPERENF/WSTPCD/CAPCD/SUPPHILLIPS PETROLEUM CO - BORGER 30111 BARKELY/SAXON HWY 152 & SPUR, BORGER, TX ORGANICS 8/1/77 3A , 5 EQPHILLIPS 66 30043 4 MILES WEST OF BORGER ON ST HWY 136ORGANICS 12/17/86 3A , 2A E,Q,V,2,3PHILLIPS 66 30111 APPROXIMATELY 3 MILES NORTHEAST OF BORGER ORGANICS,METALS 2/18/88 3A , 4,5 E,Q,V,2,3PHILLIPS 66 30131 2 MILES NE OF BORGERSULFOLANE 10/24/89 1 , 2A E,V,2PHILLIPS 66 30043 4 MILES WEST OF BORGER ON ST HWY 136ORGANICS 12/17/86 3A , 2A E,Q,V,2,3PHILLIPS 66 30111 APPROXIMATELY 3 MILES NORTHEAST OF BORGER ORGANICS,METALS 2/18/88 3A , 5 E,Q,V,2,3PHILLIPS 66 COMPANY - PHILTEX/RYTON 30131 2 MILES NE OF BORGERSULFOLANE 10/24/89 1 , 1 E,V,2CLAUDE P ROBINSON 107946 401 S CEDAR ST, BORGERGASOLINE 2/22/94 2A , 1A E,QJACK OLDHAM OIL CO INC 098342 RT 2, STINNETTGASOLINE 3/18/91 2 , 2A E,QKERR MCGEE REFINING CORP 094103 800 S CEDAR, BORGERGASOLINE 10/25/89 2A , 2A E,QMJOLHUS KJEDTIL 098709 3400 S CEDAR, BORGERDIESEL 4/18/91 2 , 2A E,QO'NEAL & VINCENT 100373 1310 S FLORIDA, BORGERGASOLINE 9/11/91 2 , 6 E,QPHILLIPS 66 109760 N HWY 207, BORGERKEROSENE 3/27/95 2A , 1A E,QSOUTHWEST COCA COLA 098649 900 FRANKLIN, BORGERGASOLINE 4/16/91 2 , 2A E,QSTIGALL & BECHTHOLD 095384 810 ROOSEVELT, BORGERGASOLINE 4/18/90 5B , 3 E,QWRIGHT RAY 097451 811 S CEDAR, BORGERGASOLINE 11/15/90 5B , 1A E,QKOPPERS INC. - HOUSTON TAR PLANT(BEAZER) 31386 INDUSTRIAL ROAD AT GREENSPOINT GATE #5, DNAPL OF COAL TAR, PAH'S 5/4/88 3D , 2A EQV2HOUSTONUnknown 106038 1618 Loop 82, San MarcosUNKNOWN 9/29/93 2 , 6 E,QZIPCO INC. 097942 753 W BELKNAP, JACKSBOROGASOLINE 8/30/90 2 , 2A E,QGARCIA GREG 102717 HWY 35, WEEDHAVENGASOLINE 4/20/92 2 , 2A E,QJACOBS TOMMY/JACOBS ANIMAL HEA 099787 215 W MAIN ST, EDNADIESEL 7/25/91 2 , 2A E,QPATTERSON BROWNING 110257 COUNTY ROAD 304, EDNADIESEL 12/21/95 2A , 1A E,QSSP PARTNERS 091684 905 W MAIN, EDNAGASOLINE 2/18/88 2 , 4 E,QTEXAS ELECTRIC COOPERATIVES 31340 US 190 1 MI SE OF JASPERCREOSOTE, ARSENIC 12/21/82 3B , 4 EQVTEXAS ELECTRIC CO-OP 31340 1 MI SE OF JASPER ON HWY 190CREOSOTE, ARSENIC 12/21/82 3 , 3 V,3HART CREOSOTING CO. 32971 1 MILE SOUTH OF JASPER ON U.S.HWY. 96DINITROPHENOL,TXD050299577PENTACHLOROPHENOL,CREOSOTE CONSTITUENTSJASPER CREOSOTING 31849 NORTH MCQUEEN, JASPERCREOSOTE, 5A , 1A ETNRCC - 1085B , 2Q

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236JASPERPCD/SUPPENTACHLOROPHENOLPSTJEFF DAVISPSTJEFFERSONENF/WSTIHWPCD/CACAMPBELL OIL CO 100738 W HWY 63, JASPERGASOLINE 10/23/91 2 , 6 E,QE TEX OIL CO/ K-P OIL INC 096865 E HWY 63, JASPERGASOLINE 8/31/90 2A , 2A E,QFULLER OIL CO INC 105841 HWY 87, BUNAUNKNOWN 10/16/92 2 , 2A E,QGUY FISHER 102516 410 N WHEELER, JASPERGASOLINE 3/19/92 2 , 3 E,Q* JASPER OIL CO112023 RT 1, JASPERGASOLINE 12/3/96 2 , 2A E,QMCMAHAN OIL CO 091738 898 N WHEELER, JASPERDIESEL 2/24/88 2 , 4 E,QTXDOT 097160 HWY 96, BUNAGASOLINE 9/20/90 2 , 2A E,Q* TXDOT112457 HWY 96, BUNAUNKNOWN 9/8/97 1B , 1A E,QTXDOT 092743 S HWY 118, FORT DAVISUNKNOWN 11/1/89 2 , 6 E,QTXDOT 099017 S HWY 118, FORT DAVISGASOLINE, DIESEL 5/20/91 2 , 5 E,QDOWELL SCHLUMBERGER - BEAUMONT 33566 5155 N. CARDINAL DR.,BEAUMONTVOCS, TPH, BTEX 6/20/89 3B , 2A EQVMOBIL OIL 30587 BURT STREET, BEAUMONTVOLATILE ORGANICS & SEMI- 1/22/87 3B , 2A EVOLATILE ORGANIPPG INDUSTRIES (PD GLYCOL) 30583 GULF STATES RD., BEAUMONTTETRAETHYL LEAD; VOLATILEORGANICS3/21/84 3B , 3 ESTAR ENTERPRISE (1) (TEXACO) PT. ARTHUR 30121 NORTH END OF HOUSTON AVE., PORT ARTHUR HYDROCARBON 2/5/91 3D , 2A EQV3BASF (FORMERLY SANDOZ) 30053 WEST PORT ARTHUR ROAD, 2 MI NW OF AIRPORT, 2,4DICHLOROPHENOL 11/8/88 3A , 4,5 E,Q,V,2,3BEAUMONTCHEMICAL WASTE MGMT - PORT ARTHUR 33905 HWY 73 S OF PORT ARTHURNICKEL, ARSENIC, PHENOLS 10/13/89 3A , 3,4,5 E,Q,V,2DUPONT - BEAUMONT WORKS 30010 STATE HWY 347, 6 MI SE OF BEAUMONTTETRACHLORIDE, CHLOROFORM, 7/1/80 3A , 4,5 ETCE, LEAD, ETHYLENEFINA - PA 30002 P.O. BOX 849, PORT ARTHURPB, BARIUM, HG, AS, SE 1/24/92 3A , 3,4,5 E,Q* HUNTSMAN CORP - PA (FORMERLY TEXACO 31907 HWY 73 AND SAVANNAH RD, PORT ARTHURBETX 10/1/90 3A , 4,5 E,Q,V,2MOBIL OIL CORP - BEAUMONT 30587 BURT STREET, BEAUMONTTPH, BENZENE 8/1/85 3B&C , 2A E,QUNION OIL OF CALIFORNIA 30001 SMITH'S BLUFF ON HWY 366, NEDERLANDARSENIC, HYDROCARBONS,CYCLOHEANE, MTBE, NAPTHA5/2/90 1D , 1A,2A E,Q,V,1BFI RENNER FACILITY, NEDERLAND 39021 W. PORT ARTHUR ROAD, PORT ARTHURCHLOROBENZENE, ANILINE,PHENOL, BENZENE4/10/91 2A , 1,2A3 ECHEMICAL WASTE MGMT - PORT ARTHUR 33905 HWY 73 S OF PORT ARTHURNICKEL, ARSENIC, PHENOLS 10/13/89 3A , 3,4 E,Q,V,2CLARK REFINING & MARKETING - PORT ARTHUR 30004 INT OF HWY 82 & HWY 87, PORT ARTHUROIL, DIESEL, BENZENE, K048 8/30/91 3B , 2A,3 E,Q,V,2AREAWASTEWATERDUPONT - BEAUMONT WORKS 30010 STATE HWY 347, 6 MI SE OF BEAUMONTTETRACHLORIDE, CHLOROFORM,TCE, LEAD, ETHYLENE7/1/80 3 , 4,5 EFINA - PA 30002 P.O. BOX 849, PORT ARTHURPB, BARIUM, HG, AS, SE 1/24/92 3A , 1,2 E,Q* HUNTSMAN CORP (A&O PLANT)31907 SAVANAH AVENUE, PORT ARTHURBTEX, PHENOLS, PHTHALATES, 10/3/97 3A , 2 E,Q,V,1,2LNAPLHUNTSMAN CORPORATION - NECHES CHEMICAL 30029 FM 365 AND HOGABOOM RD., PORT NECHES1,2 DICHLOROETHANE,1,23/18/91 3A , 2 EPLANTDICHLOROPROPANEMOBIL OIL CORP - BEAUMONT (1) 30587 BURT STREET, BEAUMONTTPH,BENZENE 8/1/85 3B&C , 2B,3 E,QSTAR ENTERPRISE - PORT ARTHUR 30121 NORTH END OF HOUSTON AVE., EAST OF HWYS 214& 73 INTERSECTIONHYDROCARBON PLUME FROMRCRA UNITS2/5/91 3A,D , 2A345 E,Q,V,3TNRCC - 109

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236JEFFERSONPCD/CAPCD/ENFPCD/SUPPCD/VCPSTSTAR ENTERPRISE ASPHALT PLANT 30017 PORT NECHESBTEX, TPH 8/7/90 3 , 0 EUNION OIL OF CALIFORNIA 30001 SMITH'S BLUFF ON HWY 366, NEDERLANDARSENIC, HYDROCARBONS, 5/2/90 1D , 1A,3 E,Q,V,1CYCLOHEXANE, MTBE, NAPTHATEXACO CHEMICAL COMPANY (HUNTSMAN) 30029 600 HWY 366ETHYLENE DICHLORIDE 7/21/97 0 , 3 EQUNION OIL COMPANY OF CALIFORNIA -30001 NEDERLAND, TXARSENIC, HYDROCARBONS, 5/2/90 3B , 3 EQVBEAUMONTCYCLOHEXANE, MTBEINTERNATIONAL CREOSOTING STATESUPERFUND SITEMAINTECH INTERNATIONAL STATE SUPERFUNDSITETX00993935891110 PINE STREET, BEAUMONT8300 OLD FERRY ROAD, PORT ARTHUR, TX.CREOSOTE CONSTITUENTS,PENTACHLOROPHENOLNAPHTHALENE,ACENAPHTHALENE,PHENANTHRENE AND OTHERPOLYCHROMATICHYDROCARBONS2/21/92 3B , 2A E,Q,V,1,2,3OLIN CORPORATION, BEAUMONT PLANT 1400 OLIN ROADARSENIC, LEAD, CHROMIUM 4/22/85 1B , 1A ESTAR ENTERPRISE PETROLEUM FUELS401 W. 19TH ST., PORT ARTHUROIL, BTEX 5/21/93 0 , 4 EMARKETING* TEXACO REFINING NEDERLAND STORAGE 291 SW CORNER HIGHWAY 347 AND HIGHWAY 365, METALS 7/10/96 0 , 6 EFACILITYPORT ARTHURASHWOOD PROPERTIES 097020 2890 COLLEGE, BEAUMONTDIST F OIL 10/22/90 2A , 1A E,Q* AZIZ NADEEM102135 2498 CALDER, BEAUMONTGASOLINE 2/12/92 2 , 2A E,QBEAUMONT ISD 098696 1740 LIVEOAK, BEAUMONTDIESEL 4/9/91 2 , 2A E,QBEAUMONT ISD 104983 1650 CALDWELL, BEAUMONTUNKNOWN 8/25/92 2 , 2A E,QBROWN & ROOT INC 096569 7366 S 1ST AVE, SABINE PASSDIESEL 8/16/90 2A , 1A E,QCARDEN OIL, SUCESSION OF 097395 7000 EASTEX FWY, BEAUMONTGASOLINE 11/14/90 2 , 6 E,QCHEVRON PRODUCTS COMPANY 091503 1500 7TH ST, PORT ARTHURGASOLINE 10/16/87 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091778 50 N IH--10, BEAUMONTUNKNOWN 3/31/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 091999 4800 TWIN CITY HWY, GROVESGASOLINE 5/18/88 2 , 4 E,QCHEVRON PRODUCTS COMPANY 098694 3644 GULFWAY, PORT ARTHURGASOLINE 8/18/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 110589 195 IH 10, BEAUMONTGASOLINE 1/11/96 2 , 2A E,QCHEVRON USA INC 091342 8105 EASTEX FWY, BEAUMONTUNKNOWN 5/16/87 2A , 6 E,QCHEVRON USA INC 093259 4948 GULFWAY, PORT ARTHURUNKNOWN 6/20/89 2A , 6 E,QCHEVRON USA INC 096112 4115 E LUCAS ST, BEAUMONTGASOLINE 3/14/90 2 , 6 E,QCHEVRON USA INC 098899 4948 GULFWAY, PORT ARTHURGASOLINE 5/10/91 2 , 2A E,QCHEVRON USA PRODUCTS CO 095830 3549 TWIN CITY HWY, PORT ARTHURGASOLINE 5/17/90 2 , 6 E,QCIRCLE K CORP 108635 3015 TWIN CITY HWY, NEDERLANDGASOLINE 8/18/94 2 , 2A E,QCITY OF PORT ARTHUR 111191 301 4TH ST, PORT ARTHURGASOLINE, DIESEL 6/5/96 2A , 6 E,QCITY OF PORT ARTHUR 111192 444 4TH ST, PORT ARTHURDIESEL 6/5/96 2A , 6 E,QCONTAINER PRODUCTS INC 098695 HWY 87, PORT ARTHURDIST F OIL 4/3/91 2A , 6 E,Q* DARBY GAS & OIL111420 120 GULFWAY, PORT ARTHURGASOLINE 7/29/96 2 , 2A E,QDARBY GAS & OIL CO 110386 3002 NALL, PORT NECHESGASOLINE 12/12/95 2 , 2A E,Q* DARBY GAS & OIL CO110415 5991 JADE AVE, PORT ARTHURGASOLINE 12/12/95 2 , 2A E,QDARBY GAS & OIL CO. 097185 4248 MAIN AVE, GROVESGASOLINE 10/15/90 2 , 2A E,QDARBY OIL CO 091739 2501 PURE ATLANTIC RD, PORT NECHESGASOLINE 3/2/88 2 , 2A E,QDARBY OIL CO 092379 1901 PORT NECHES AVE, PORT NECHESGASOLINE 11/1/88 2 , 2A E,QDARBY OIL CO 099499 890 N 11TH ST, BEAUMONTGASOLINE 6/28/91 2 , 2A E,Q3B , 3E,Q,V,1,2,3TNRCC - 110

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236JEFFERSONPSTDARBY OIL CO 104525 2015 N 11TH, BEAUMONTGASOLINE 11/13/90 2 , 2A E,Q* DIAMOND SHAMROCK111458 6450 CALDER RD, BEAUMONTGASOLINE 8/7/96 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 092141 3060 NORTH ST, BEAUMONTGASOLINE 5/15/88 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO093849 1165 S 11TH ST, BEAUMONTDIESEL 10/13/89 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO108450 507 TWIN CITY HWY, NEDERLANDGASOLINE 3/21/94 2 , 2A E,QDOWELL SCHLUMBERGER INC 093791 5155 W CARDINAL DR, BEAUMONTGASOLINE 10/11/89 2 , 2A E,QE I DUPONT DE NEMOURS 092317 HWY 347, BEAUMONTGASOLINE 11/17/88 2 , 2A E,QE Z MART STORES INC 104919 4195 GLADYS, BEAUMONTGASOLINE 6/8/92 2 , 4 E,QE Z MART STORES INC 110387 710 S IH-10, BEAUMONTGASOLINE 12/8/95 2A , 1A E,Q* E Z MART STORES INC110418 7645 PHELAN BLVD, BEAUMONTGASOLINE 8/3/95 2 , 2A E,QE Z MART STORES INC 111739 1320 N 11TH ST, BEAUMONTGASOLINE 9/22/96 1B , 1A E,QESTATE OF WANZA ODOM 097635 3948 9TH AVE, PORT ARTHURGASOLINE 12/12/90 2 , 2A E,QESTATE OF WANZA ODOM 097636 6201 JADE AVE, PORT ARTHURGASOLINE 12/10/90 2 , 2A E,QESTATE OF WANZA ODOM 097988 6900 32ND ST, GROVESGASOLINE 2/7/91 2 , 2A E,QEXXON COMPANY USA 095181 107 N TWIN CITY HWY, NEDERLANDGASOLINE 3/21/90 2 , 6 E,QEXXON COMPANY USA 098305 7995 COLLEGE ST, BEAUMONTGASOLINE 10/6/90 2 , 2A E,QEXXON COMPANY USA 102063 3980 EASTEX FWY, BEAUMONTUNKNOWN 7/22/91 2 , 2A E,QEXXON COMPANY USA 104154 1397 WASHINGTON BLVD, BEAUMONTGASOLINE 4/30/91 2 , 2A E,QEXXON COMPANY USA 107042 550 W CARDINAL DR, BEAUMONTGASOLINE 1/8/93 2 , 2A E,QFDIC 096930 2625 CALDER ST, BEAUMONTGASOLINE, WASTE OIL 9/24/90 2 , 2A E,QFINA OIL & CHEMICAL CO 091392 6050 COLLEGE, BEAUMONTGASOLINE 7/30/87 2 , 2A E,QFINA OIL & CHEMICAL CO 091619 5266 GULFWAY DR, PORT ARTHURGASOLINE 12/14/87 2A , 6 E,QFINA OIL & CHEMICAL CO 103359 5266 GULFWAY DR, PORT ARTHURDIESEL 6/24/92 2A , 1A E,Q* G. M. GENESIS SERVICE CO098270 2910 WASHINGTON BLVD, BEAUMONTGASOLINE 3/2/91 5B , 2A E,QHARDING & LAWLER INC 095139 1903 PORT NECHES AVE, PORT NECHESDIESEL 3/19/90 2 , 6 E,QHEATH VAUGHN ENTERPRISES 091343 3355 GLAYDS, BEAUMONTUNKNOWN 4/10/87 2A , 2A E,QJ D KOCHIII 104483 5590 COLLEGE, BEAUMONTGASOLINE 8/18/92 2 , 2A E,QJASPER OIL CO 100244 9495 COLLEGE, BEAUMONTDIESEL 8/19/91 2 , 2A E,QJASPER OIL COMPANY INC 098267 2704 HWY 365, NEDERLANDGASOLINE 2/21/91 2 , 2A E,QJERRY PORTER OIL CO 091423 1504 WASHINGTON BLVD, BEAUMONTGASOLINE 8/5/87 2 , 3 E,Q* K S YOUNG INC112644 1219 MAGNOLIA, PORT NECHESGASOLINE 9/12/97 1B , 1A E,Q* KIM NGUYN & STEPHEN VO110312 1402 WASHINGTON, BEAUMONTGASOLINE 1/11/96 2 , 2A E,QKMART CORP 097164 3295 COLLEGE ST, BEAUMONTGASOLINE 10/19/90 2A , 4 E,Q* LEO THOMPSON112691 HWY 69, NEDERLANDGASOLINE 1/1/94 1B , 1A E,QMARTIN MATTHEWS OIL CO 091692 6515 HWY 105, BEAUMONTGASOLINE 2/18/88 2A , 1A E,Q* MARTIN MATTHEWS OIL CO093058 1245 W CARDINAL DR, BEAUMONTGASOLINE 5/16/89 2 , 2A E,QMARTIN MATTHEWS OIL CO 094514 2108 HWY 365, NEDERLANDGASOLINE 12/21/89 2 , 4 E,QMERCHANTS FAST MOTOR LINES 097770 HWY 347, BEAUMONTDIESEL 5/17/90 2 , 2A E,QMOBIL OIL CORP 091296 8095 EASTEX, BEAUMONTGASOLINE 11/1/85 2 , 2A E,QMOBIL OIL CORP 091854 510 N IH-10, BEAUMONTGASOLINE 11/5/87 2 , 2A E,Q* MUSTANG TRACTOR & EQUIP112163 7990 EASTEX FWY, BEAUMONTGASOLINE, DIESEL 12/14/93 2 , 2A E,Q* NECHES FOOD STORES110664 1900 HELENA, NEDERLANDUNKNOWN 3/27/96 2 , 2A E,QNOOR ALI JIVANI 091578 6048 MONROE, GROVESGASOLINE 12/21/87 2 , 2A E,QNORTH AUTO PARK INC 091771 5550 EASTEX FRWY, BEAUMONTUNKNOWN 3/23/88 2 , 2A E,QPARKER'S OF SOUTHEAST TEXAS 097183 7600 9TH AVE, PORT ARTHURGASOLINE 10/25/90 2 , 2A E,QPETRO TRUCK STOP 095573 5405 WALDEN RD, BEAUMONTDIESEL 5/3/90 2A , 6 E,QPFEIFFER P C 094317 1255 MAIN, BEAUMONTGASOLINE 12/14/89 2 , 2A E,QPORT OF BEAUMONT 102574 1255 MAIN ST, BEAUMONTDIESEL 10/22/91 2A , 1A E,QTNRCC - 111

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236JEFFERSONPSTJIM HOGGPSTJIM WELLSENF/WSTPCD/ENFPSTPORTER OIL COMPANY 091511 5595 COLLEGE ST, BEAUMONTGASOLINE 10/2/87 2A , 2A E,QSTAR ENTERPRISE 091059 205 IH-10, BEAUMONTGASOLINE 1/27/86 2 , 3 E,QSTAR ENTERPRISE 102064 4190 GLADYS AVE, BEAUMONTGASOLINE 9/22/91 2 , 3 E,QSTAR ENTERPRISE 110439 3949 TWIN CITY HWY, PORT ARTHURGASOLINE 7/2/93 2 , 2A E,QSTAR ENTERPRISE 110440 3700 GULFWAY, PORT ARTHURGASOLINE 9/3/93 2 , 2A E,QSTAR ENTERPRISE 110441 2549 MEMORIAL, PORT ARTHURGASOLINE 9/3/93 2A , 6 E,QSTAR ENTERPRISE 110442 6390 CALDER, BEAUMONTGASOLINE 7/2/93 2 , 2A E,QSTEINHAGEN OIL CO INC 091260 1602 MAGNOLIA, PORT NECHESUNKNOWN 3/18/87 2 , 2A E,QTEXACO REFINING & MARKETING 092071 5605 CALDER AVE, BEAUMONTGASOLINE 6/16/88 2A , 6 E,QTEXACO REFINING & MARKETING 092752 680 N 11TH ST, BEAUMONTWASTE OIL 3/11/89 2 , 2A E,QTHOMAS C L PETROLEUM 099327 501 WASHINGTON, BEAUMONTGASOLINE 5/24/91 2 , 2A E,Q* TXDOT105839 NE GLADYS, BEAUMONTGASOLINE 12/1/92 2 , 2A E,Q* TXDOT105843 MARTIN LUTHER KING, BEAUMONTGASOLINE, WASTE OIL 12/3/92 2 , 2A E,QUNITED PARCEL SERVICE 098817 6751 PROCTOR ST, PORT ARTHURGASOLINE 4/29/91 2 , 2A E,QVALLEY STAR INC 099799 3910 DELAWARE, BEAUMONTGASOLINE 8/5/91 2 , 2A E,QVIKING FREIGHT SYSTEMS 094480 6315 HWY 347, BEAUMONTGASOLINE 12/15/89 2 , 2A E,Q* WALMART STORES INC112305 3955 EASTEX FWY, BEAUMONTGASOLINE, DIESEL 12/10/96 2 , 2A E,QWIGGENS BRUCE SERVICE STATION 098025 2500 PARK ST, BEAUMONTGASOLINE 2/14/91 2 , 6 E,QWINDEMERE DEVELOPMENT COMPANY 091551 7410 HWY 105, BEAUMONTGASOLINE 11/30/87 2 , 2A E,QWINK, INC. 096849 3190 NORTH STREET, BEAUMONTGASOLINE 10/2/90 2 , 2A E,QH RAMIREZ 098793 411 S SMITH, HEBBRONVILLEGASOLINE 4/29/91 5B , 6 E,QSALINAS FRANK E 098794 602 W VIGGIE, HEBBRONVILLEGASOLINE 4/29/91 5B , 2A E,QDOWELL SCHLUMBERGER - ALICE 33569 INDUSTRIAL BLVD., ALICEVOC'S,PETROLEUMHYDROCARBONS4/20/89 3B , 2A EQV23COASTAL STATES CRUDE - JIM WELLS CO. 39987 FM 445, 3 MI NORTH OF FALFURRIASHYDROCARBONS 10/23/89 2B , 3 EQALICE ISD 098300 1212 N STADIUM DR, ALICEGASOLINE 3/18/91 2 , 2A E,QCIRCLE K STORES, INC. 097916 1800 E MAIN, ALICEGASOLINE 1/30/91 2 , 2A E,QCOASTAL MAVERICK 106826 1723 E MAIN, ALICEUNKNOWN 4/23/93 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 094302 315 N JOHNSON ST, ALICEGASOLINE 12/14/89 2 , 4 E,QDOWELL SCHLUMBERGER INC 097989 INDUSTRIAL BLVD, ALICEUNKNOWN 2/8/91 2 , 4 E,Q* E Z SERVE CONVENIENCE STORES111677 1401 SAN DIEGO HWY, ALICEGASOLINE 9/9/96 2 , 2A E,QE Z SERVE CONVENIENCE STORES 111697 1100 E FRONT, ALICEGASOLINE 9/6/96 2 , 2A E,QEXXON COMPANY USA 098037 301 N JOHNSON, ALICEGASOLINE 7/31/90 2A , 6 E,QFFP OPERATING PARTNERS 098173 709 N JOHNSON ST, ALICEGASOLINE 2/18/86 2 , 2A E,QGABRIELS DRIVE IN 100903 1710 S TEXAS BLVD, ALICEGASOLINE 11/5/91 2 , 2A E,QGROVER CAIN/SALLY W CAIN TRST 095095 1101 E MAIN ST, ALICEGASOLINE 3/16/90 2 , 2A E,Q* HELDT BROS TRUCKING CO100850 917 S JOHNSON, ALICEGASOLINE, DIESEL 11/13/91 2 , 2A E,QJ C PENNY COMPANY INC 091003 1401 E MAIN, ALICEGASOLINE 7/1/81 2 , 2A E,QJOHN WORSHAM 109795 FM 534, SANDIAGASOLINE 5/31/95 2 , 2A E,QP. R. ARGUINDEGUI JR 103229 S HWY 281, ALICEGASOLINE 5/29/92 2 , 6 E,QTEXAS STAR INVESTMENTS 093269 1617 E MAIN, ALICEGASOLINE 7/20/89 2 , 2A E,QTNRCC - 112

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236JIM WELLSPSTJOHNSONPCD/VCJONESPSTENF/WSTPCD/ENFPCD/VCPSTTEXAS STAR INVESTMENTS 111593 1605 S HWY 281, ALICEGASOLINE, DIESEL 4/17/96 2 , 2A E,QTEXAS STAR OIL CO 103438 215 N JOHNSON, ALICEGASOLINE 5/29/92 2 , 2A E,QGUNDERSON LEASE PROPERTY/ATSF RAILYARD 386 101 PARK STREET, CLEBURNEMETALS, VOCS, SVOCS, TPH 10/31/96 0 , 4 E* AL DOSSANI112953 FM 2280, CLEBURNEGASOLINE 10/28/97 1B , 1A E,QBENNETT EUGENE J 098119 1465 E RENFRO, BURLESONGASOLINE 2/25/91 2 , 2A E,Q* BOB HARRIS OIL CO108468 1490 W HENDERSON, CLEBURNEDIESEL 5/3/94 2 , 2A E,QCURRENT OCCUPANT 096754 201 N BURLESON BLVD, BURLESONGASOLINE 9/19/90 2A , 6 E,Q* E Z SERVE INC111719 1200 N MAIN, CLEBURNEGASOLINE 9/23/96 2 , 2A E,QE Z SERVE INC 111720 141 SW WILSHIRE BLVD, BURLESONGASOLINE 9/24/96 2 , 2A E,QHARRIS OIL COMPANY 094991 1001 S CADDO ST, CLEBURNEGASOLINE 8/14/89 2 , 2A E,QHARRIS OIL COMPANY 094992 HWY 377, WHISKEY FLATGASOLINE 8/14/89 2 , 2A E,QJOHNSON COUNTY -PRECINCT 4 104230 100 LOUISIANA ST, GRANDVIEWGASOLINE, DIESEL 7/24/92 2A , 1A E,Q* LAMBERT OIL CO105193 FM 916, GRANDVIEWGASOLINE, DIESEL, WASTE OIL 10/23/92 2 , 2A E,Q* LAMBERT OIL CO105195 S HWY 81, GRANDVIEWGASOLINE 10/23/92 2 , 2A E,QLAMBERT OIL CO 106424 504 HWY 174, JOSHUAGASOLINE 3/29/93 2 , 2A E,QMARTIN BILL 101018 IH--35 RD, BURLESONGASOLINE 11/18/91 2 , 5 E,QONE STOP FOOD STORES 111705 S HWY 174, RIO VISTAGASOLINE 9/11/96 2 , 3 E,QRESOLUTION TRUST CORP 100852 315 N MAIN ST, CLEBURNEGASOLINE 6/7/91 2 , 2A E,QRESTRUCTURE PETROLEUM MARKETIN 106672 RT 1, JOSHUAGASOLINE 4/13/93 2 , 2A E,Q* S & T OIL CO INC112542 100 N BURLESON BLVD, BURLESONUNKNOWN 8/15/97 2 , 5 E,QSMALL BUSINESS ADMINISTRATION 100080 400 N BROADWAY, JOSHUAGASOLINE 7/31/91 2 , 6 E,QSTAR ENTERPRISE 107822 100 SW WILSHIRE, BURLESONDIESEL 11/18/93 2 , 6 E,QSTAR ENTERPRISE 107823 701 NE ALSBURY BLVD, BURLESONGASOLINE 11/11/93 2 , 6 E,QTCL FIRE & CASUALTY INC 106247 303 N PARKWAY, ALVARADOGASOLINE 3/2/93 1B , 1A E,QTCL FIRE & CASUALTY INC 106248 301 N PARKWAY, ALVARADOGASOLINE, DIESEL 3/2/93 2A , 1A E,Q* TOWN & COUNTRY112606 440 SW WILSHIRE, BURLESONGASOLINE 6/5/97 1B , 1A E,QTXDOT 101215 1309 W HENDERSON, CLEBURNEGASOLINE, KEROSENE 11/8/91 2 , 6 E,QUNKNOWN 092473 700 HARRISON ST, CLEBURNEGASOLINE 10/1/88 5B , 2A E,QWORLOW DONALD & BOBBY 102810 601 S MAIN ST, CLEBURNEGASOLINE 4/23/92 2 , 2A E,QZIPCO INC 098528 241 E WILSHIRE, BURLESONGASOLINE 1/14/91 2 , 2A E,Q* PRIDE REFINING - ABILENE30889 3 MILES N. OF ABILENE ON HWY 277, ABILENE BTEX, PHENOL 2/12/92 4B , 0 EQAMERICAN PETROFINA MARKETING INC. 33770 US 277 3 MILES S OF HAWLEYFUEL CONSTITUENTS 12/13/89 2B , 2A EQV2ABILENE WEST FACILITY 396 300 WALL STREET, ABILENECHLORINATED SOLVENTS 11/14/96 0 , 2 EALLSUPS PETROLEUM 111615 1633 S COMMERCIAL ST, ANSONGASOLINE 3/29/96 2 , 2A E,QALVIN SCONCE 094785 402 N SWENSON, STAMFORDGASOLINE 1/30/90 1B , 1A E,QCIRCLE K STORES 110898 512 E HAMILTON, STAMFORDGASOLINE 4/11/96 2 , 6 E,QCITY OF ANSON 092663 6039 HWY 83, ANSONGASOLINE 3/3/89 5B , 1A E,QTNRCC - 113

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236JONESPSTKARNESENF/WSTIHWPCD/SUPPSTKAUFMANPSTCITY OF STAMFORD 095089 105 N WETHERBEE, STAMFORDGASOLINE 1/23/90 2 , 5 E,QJONES COUNTY PRECINCT ONE 092529 50 NE AVE C, HAMLINGASOLINE, DIESEL 12/15/88 2 , 2A E,QLEPARD OIL COMPANY 091966 202 N COMMERCIAL, ANSONGASOLINE 6/8/88 5B , 1A E,QLEPARD OIL COMPANY 091967 S HWY 277, ANSONGASOLINE 6/8/88 5B , 1A E,QLINER OIL CO 103446 HWY 6, LUEDERSGASOLINE 6/4/92 2 , 2A E,QNAVERT DWAIN 101653 301 HAMILTON, STAMFORDGASOLINE, DIESEL, WASTE OIL 1/23/92 2 , 2A E,QSAV M CONVENIENCE STORES 111265 13 S CENTRAL ST, HAMLINGASOLINE 6/26/96 2 , 2A E,QSKINNYS INC 111222 7TH, ANSONGASOLINE 6/13/96 2 , 2A E,QUNKNOWN 091145 UNKNOWN, ANSONUNKNOWN 10/20/86 5B , 1A E,QUNKNOWN 091339 832 17TH ST, ANSONUNKNOWN 3/14/87 5B , 1A E,QUNKNOWN 111646 1714 AVE K, ANSONUNKNOWN 9/25/96 5B , 1A E,QWYLIE INC 093931 330 N COMMERCIAL, ANSONGASOLINE 10/5/89 5B , 2A E,Q* WYLIE INC112174 1313 N SWENSON, STAMFORDGASOLINE, DIESEL 3/6/97 2 , 2A E,QTEXAS PROCESSING 39877 SH 72 APPROX 11 MI SW OF KENEDY, CORPUS BTEX, TPH 8/19/93 3B , 2B ECHRISTICHEVRON RESOURCES 02402 KARNES COUNTYAS,CL,SO4 3/1/80 0 , 5 E,QBUTLER RANCH STATE SUPERFUND SITE 11.8 MILES WEST OF FALLS CITY, TX. ON FM 791 STYRENE TARS, VINYL 5B , 6 E,Q,V,2,3* DIAMOND SHAMROCK REF & MKTG CO098861 322 S 2ND ST, KENEDYGASOLINE 5/3/91 2 , 2A E,QFFP OPERATING PARTNERS 098887 120 SUNSET STRIP, KENEDYGASOLINE 10/19/89 2 , 5 E,QFRANKES GROCERY 093344 HWY 81, RUNGEUNKNOWN 7/14/89 2A , 1A E,QPRESTON PARSONS INC 096397 2ND ST, KENEDYGASOLINE 8/2/90 2 , 2A E,Q* PRESTON PARSONS INC108793 HWY 181, FALLS CITYGASOLINE 10/31/94 2 , 2A E,Q* RIO GRANDE RESOURCES105710 HWY 123, PANNA MARIAGASOLINE, WASTE OIL 11/12/92 2 , 2A E,QTEXAS STAR INVESTMENTS 102253 102 N SUNSET STRIP, KENEDYGASOLINE, DIESEL 2/7/92 2 , 2A E,Q* BORDERS & LONG OIL CO INC112782 2006 S WASHINGTON, KAUFMANGASOLINE, DIESEL 10/29/97 1B , 1A E,QBRISCOE OIL CO 102174 420 E GROVE ST, TERRELLGASOLINE, WASTE OIL 2/26/92 2 , 2A E,QBRYAN BUTCH 108194 FM 429, TERRELLGASOLINE 5/16/94 5B , 1A E,Q* DONNELL TERRY D105911 HWY 175, KEMPGASOLINE 1/6/93 2 , 3 E,Q* FINA OIL & CHEMICAL CO098976 601 E MOORE ST, TERRELLGASOLINE 4/18/88 2 , 2A E,Q* FOOD FAST STORES111865 200 S 3RD ST, MABANKGASOLINE 10/12/96 2 , 2A E,QLALUMIA HENRY 092217 1109 MULBERRY, KAUFMANGASOLINE 9/16/88 5B , 6 E,QMILLER TRUCK STOP 104421 HWY 80, FORNEYGASOLINE 8/28/92 5B , 2A E,QMUSSER MOTORS INC 104548 1212 W MOORE ST, TERRELLUNKNOWN 9/9/92 2 , 2A E,Q* RICHEY CHEV-OLDS-PONTIAC108009 E HWY 175, KAUFMANWASTE OIL, GASOLINE 3/1/94 2A , 1A E,QSATARIO MOORE INC 109568 1744 S CARRIER PKWY, GRAND PRARIEWASTE OIL 3/17/95 2A , 1A E,QSOUTHLAND CORP 091710 2005-A S WASHINGTON, KAUFMANGASOLINE 2/5/88 2 , 2A E,QSOUTHLAND CORP 096858 2005 A S WASHINGTON ST, KAUFMANGASOLINE 10/4/90 2A , 1A E,QUNKNOWN 091713 S WASHINGTON, KAUFMANGASOLINE 2/3/88 2 , 2A E,QUNKNOWN 106395 1900 BLK S WASHINGTON, KAUFMANGASOLINE 3/29/93 1B , 1A E,QTNRCC - 114

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236KENDALLPSTKERRKIMBLEKINNEYPSTPSTPSTKLEBERGPCD/ENFPSTDIAMOND SHAMROCK REF & MKTG CO 102718 1241 S MAIN, BOERNEGASOLINE 4/9/92 2 , 2A E,QKENDALL COUNTY 104203 HWY 3160, KENDALIADIESEL 3/17/92 2A , 1A E,QV HOMILIUS & C SCHMIDT 110099 HWY 27, COMFORTGASOLINE 11/15/95 2 , 2A E,QESTATE OF BETTY BIEDENHARN, 110243 812 JUNCTION HWY, KERRVILLEGASOLINE 11/17/95 2A , 1A E,QEXXON COMPANY USA 099082 2303 SIDNEY BAKER, KERRVILLEGASOLINE 1/28/91 2 , 2A E,Q* INGRAM READY-MIX INC112852 2022C SIDNEY BAKER, KERRVILLEUNKNOWN 12/23/97 1B , 1A E,QMINI MART 104313 HWY 27, KERRVILLEGASOLINE 8/18/92 2 , 2A E,Q* MINI MART CONVENIENCE STORES112294 1001 S SIDNEY BAKER, KERRVILLEGASOLINE 12/19/96 2 , 2A E,QMINI MART INC 111104 1980 SIDNEY BAKER, KERRVILLEDIESEL 5/20/96 2 , 2A E,Q* RONNIE BOCK111991 1112 N SIDNEY BAKER RD, KERRVILLEUNKNOWN 1/2/97 2 , 6 E,QSTROEHER & SON INC 110373 920 SIDNEY BAKER, KERRVILLEGASOLINE 1/19/96 2 , 2A E,QUNKNOWN 091147 1523 JUNCTION HWY, KERRVILLEUNKNOWN 4/17/85 5B , 1A E,QV A MEDICAL CENTER 091403 3600 MEMORIAL BLVD, KERRVILLEDIESEL 7/23/87 2 , 6 E,Q* R C MCBRYDE112247 IH 10, JUNCTIONGASOLINE, DIESEL 11/6/96 2 , 2A E,QVICTOR & GERALD LOEFFLER 109833 702 MAIN ST, JUNCTIONWASTE OIL 8/2/95 2 , 2A E,QMICHAEL ROSALLE 111529 200 W HWY 90, BRACKETTVILLEGASOLINE 8/20/96 2 , 6 E,QUNKNOWN 092677 HWY 90, BRACKETTVILLEUNKNOWN 3/6/89 5B , 1A E,QCOASTAL STATES CRUDE - KLEBERG CO. 39493 4 MI EAST OF HY 77 NEAR RICARDOHYDROCARBONS 10/23/89 2A , 2A EQCHEVRON PRODUCTS COMPANY 093213 201 S HWY 77, KINGSVILLEUNKNOWN 6/30/89 2 , 4 E,QCURRENT OCCUPANT 096347 1202 N ARMSTRONG, KINGSVILLEGASOLINE 8/1/90 2 , 2A E,QDEAN A HARREL N SHARP N TRUSTE 094561 6TH, KINGSVILLEDIESEL 1/18/90 5B , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 098656 525 S 14TH ST, KINGSVILLEGASOLINE 2/28/91 2 , 6 E,QDON SKROBARCZYK 096300 1110 W KING, KINGSVILLEWASTE OIL 8/1/90 1B , 1A E,Q* DOROTHY ADAMS110402 1029 W KING ST, KINGSVILLEGASOLINE 2/13/96 2 , 2A E,QE Z SERVE CONVENIENCE STORES 111675 HWY 77, RIVIERAGASOLINE 9/9/96 2 , 2A E,QE Z SERVE CONVENIENCE STORES 111694 1624 S 6TH ST, KINGSVILLEGASOLINE 9/6/96 2 , 2A E,QE Z SERVE CONVENIENCE STORES 111695 1013 S 14TH ST, KINGSVILLEGASOLINE 9/6/96 2 , 2A E,QE Z SERVE CONVENIENCE STORES 111696 1105 N 14TH ST, KINGSVILLEGASOLINE 8/30/96 2 , 2A E,QE Z SERVE CONVENIENCE STORES 111698 128 W CORRAL ST, KINGSVILLEGASOLINE 9/4/96 2 , 2A E,QE Z SERVE PETROLEUM MARKETING 092163 703 W CORRAL, KINGSVILLEGASOLINE 7/29/88 2 , 2A E,QE Z SERVE PETROLEUM MARKETING 093204 809 W KING ST, KINGSVILLEGASOLINE 6/21/89 2 , 2A E,QFUEL MANAGEMENT SYSTEMS INC 093164 6TH HWY 77, KINGSVILLEGASOLINE 6/12/89 2A , 6 E,QGATES OIL CO INC 111547 HWY 77, RIVERAGASOLINE 6/14/96 1B , 1A E,QHOSE PETROLEUM 093615 800 S 6TH ST, KINGSVILLEGASOLINE 7/25/89 2 , 2A E,QHOSE PETROLEUM 094994 1110 W KING, KINGSVILLEGASOLINE 3/12/90 2 , 2A E,QHOSE PETROLEUM 096898 623 N 6TH ST, KINGSVILLEGASOLINE 9/26/90 2A , 6 E,Q* HOSE PETROLEUM108783 201 S 6TH ST, KINGSVILLEWASTE OIL 10/28/94 2 , 5 E,QTNRCC - 115

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236KLEBERGPSTKNOXPSTWQD* HOSE PETROLEUM108784 620 N ARMSTRONG, KINGSVILLEWASTE OIL 10/28/94 2 , 2A E,QHOSE PETROLEUM 111703 201 S 14TH ST, KINGSVILLEGASOLINE 9/27/96 2 , 2A E,QHOSE PETROLEUM CO 111777 701 N HWY 77 BYPASS, KINGSVILLEGASOLINE 10/15/96 2 , 2A E,Q* HOSE PETROLEUM CO112409 1101 S 6TH ST, KINGSVILLEUNKNOWN 7/25/89 2A , 1A E,Q* J & E OIL CO112613 119 S 14TH ST, KINGSVILLEGASOLINE 9/9/97 1B , 1A E,Q* J & E OIL INC112599 HWY 77, RIVIERAGASOLINE 9/4/97 1B , 1A E,Q* KING RANCH INC104972 KING RANCH, KINGSVILLEGASOLINE 10/15/92 2 , 2A E,QKLEBERG COUNTY PRECINCT 3 099776 E CTY RD 2310, RIVIERADIESEL 7/30/91 1B , 1A E,QNELSON FUELS, INC. 097423 400 S 6TH ST, KINGSVILLEGASOLINE 11/16/90 2A , 2A E,QPENA EVANGELINA/PENA OVIDIO 102750 700 N 6TH ST, KINGSVILLEUNKNOWN 12/10/91 5B , 6 E,QSHELBESTCO INC 096601 116 14TH ST, KINGSVILLEGASOLINE 8/27/90 2 , 2A E,QSSP PARTNERS 110702 1114 14TH ST, KINGSVILLEGASOLINE 3/18/96 2 , 2A E,QSTATE FARM INSURANCE 102978 515 S 14TH ST, KINGSVILLEGASOLINE, DIESEL 4/29/92 2 , 2A E,QTIGER AVIATION SERVICES INC 102316 HWY 141, KINGSVILLEAV-GAS 3/13/92 2 , 2A E,QTIGER AVIATION SERVICES INC 102975 HWY 141, KINGSVILLEAV-GAS 3/31/92 2 , 2A E,Q* TXDOT101354 1440 N 14TH, KINGSVILLEGASOLINE 12/23/91 2 , 2A E,QUS NAVY KINGSVILLE N A S 091613 KINGSVILLE NAS , KINGSVILLEUNKNOWN 11/1/85 2 , 3 E,QUS NAVY KINGSVILLE N A S 097130 BLDG 1770 BLDG 1770, KINGSVILLEGASOLINE 10/23/90 2 , 2A E,QUS NAVY KINGSVILLE N A S 100136 NAS KINGSVILLE, KINGSVILLEAV-GAS 5/8/91 2 , 6 E,QUS NAVY KINGSVILLE N A S 107203 BLDG 1715, KINGSVILLEGASOLINE 2/4/90 2 , 2A E,Q* V T COLLINS108092 522 N 5TH ST, KINGSVILLEGASOLINE, DIESEL 4/13/94 2 , 2A E,QALLSUPS PETROLEUM 111611 105 S CENTRAL ST, KNOX CITYGASOLINE 4/2/96 2 , 2A E,QBRIDGES OIL COMPANY 092299 109 MAIN ST, KNOX CITYDIESEL 11/9/88 5B , 2A E,QHARMEL OIL CO 095179 312 N CENTRAL, KNOX CITYGASOLINE 3/14/90 2A , 1A E,QJ C EATON AND SON INC 094828 100 MAIN ST, KNOX CITYGASOLINE 1/29/90 2 , 2A E,Q* K C OIL CO112507 N HWY 277, MUNDAYDIESEL 6/19/97 2 , 2A E,QMOORHOUSE L/DUNKLE S ESTATE 096611 HWY 82, BENJAMINGASOLINE 8/16/90 2 , 6 E,QPENMAN CONOCO SERVICE 093877 HWY 82, BENJAMINGASOLINE 10/17/89 2A , 1A E,QRON LANEY OIL CO 111470 210 E MAIN, KNOX CITYGASOLINE 8/9/96 2 , 2A E,QTERRA INTERNATIONAL INC 094598 COUNTRY CLUB LN, KNOX CITYGASOLINE 1/4/90 2A , 6 E,QTYRA SAM 092126 BLK 164, MUNDAYGASOLINE 9/6/88 1B , 1A E,QUSDA-NRCS 093222 FM 1292, KNOX CITYGASOLINE 6/26/89 2A , 2A E,QTDA PESTICIDE SURVEY 2134102 WELL NO. 21-34-102 (SAMPLE 4761-91-030) "KNOX PROMETON 10/1/90 2D , 1 V,2,336"TDA PESTICIDE SURVEY 2134104 WELL NO. 21-34-104 (SAMPLES REP 1 & REP 2) ATRAZINE 8/16/88 2D , 2B E,Q,V,2"KNOX 7"TDA PESTICIDE SURVEY 2134129 WELL NO. 21-34-129 (SAMPLE 4761-91-012) "KNOX41"PROMETON 9/17/90 2D , 1 V,2,3TDA PESTICIDE SURVEY 2134213 WELL NO. 21-34-213 (SAMPLE 4761-91-005) "KNOX PROMETON 9/5/90 2D , 1 V,2,335"TDA PESTICIDE SURVEY 2134220 WELL NO. 21-34-220 (SAMPLES REP 1 & REP 2) PROMETON 6/2/87 2D , 2B E,Q,V,2"KNOX 21"TDA PESTICIDE SURVEY 2134225 WELL NO. 21-34-225 (SAMPLES REP 1 & REP 2) PROMETON 8/10/88 2D , 2B E,Q,V,2"KNOX 5"TDA PESTICIDE SURVEY 2134402 WELL NO. 21-34-402 (SAMPLE 4761-91-038) "KNOX PROMETON 10/2/90 2D , 1 V,2,353"TDA PESTICIDE SURVEY 2134403 WELL NO. 21-34-403 (SAMPLE 4761-91-037) "KNOX PROMETON 10/2/90 2D , 1 V,2,3TNRCC - 116

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236KNOXWQD52"TDA PESTICIDE SURVEY 2134516 WELL NO. 21-34-516 (SAMPLES REP 1 & REP 2) PROMETON 5/27/87 2D , 2B E,Q,V,2"KNOX 1"TDA PESTICIDE SURVEY 2134547 WELL NO. 21-34-547 (SAMPLE 4761-91-025) "KNOX 4" PROMETON 9/19/90 2D , 1 V,2,3TDA PESTICIDE SURVEY 2134549 WELL NO. 21-34-549 (SAMPLE 4761-91-044) "KNOX ATRAZINE 10/3/90 2D , 1 V,2,358"TDA PESTICIDE SURVEY 2134550 WELL NO. 21-34-550 (SAMPLE 4761-91-043) "KNOX PROMETON 10/3/90 2D , 1 V,2,364"TDA PESTICIDE SURVEY 2134584 WELL NO. 21-34-584 (SAMPLE 4761-91-027) "KNOX PROPAZINE, ATRAZINE 9/19/90 2D , 1 V,2,342"TDA PESTICIDE SURVEY 2134647 WELL NO. 21-34-647 (SAMPLE 4761-91-026) "KNOX PROMETON 9/19/90 2D , 1 V,2,355"TDA PESTICIDE SURVEY 2134854 WELL NO. 21-34-854 (SAMPLE 0686-91-019) "KNOX PROMETON 9/25/90 2D , 1 V,2,359"LA SALLEPSTLAMARMSWLEE R OIL CO INC 109460 101 SHELDON BLVD, ARTESIA WELLSGASOLINE 4/17/95 2A , 6 E,QCITY OF PARIS: MW-1, 3, 6, AND 11 MSW00144 ON STILLHOUSE RD., 3 MI. NE OF LOOP 286, PARIS, VOCs (TCE, PCE, BENZENE, 1,1-TX.DICHLOROETHENE, AND CIS-1,2-DICHLOROETHENE)8/20/91 2B , 2A E,Q,V,2LAMBPCD/CAPSTPSTKIMBERLY-CLARK CORPORATION 33890 2200 19TH ST., PARISDIESEL FUEL 12/13/93 0 , 4 EA R W INC 092361 2805 N MAIN, PARISGASOLINE 12/1/88 2A , 2A E,QCIRCLE K CORP 092607 1870 BONHAM ST, PARISGASOLINE 5/3/88 2 , 2A E,QCIRCLE K CORP 093887 2705 CLARKSVILLE ST, PARISGASOLINE 11/1/89 2 , 2A E,QCOCA COLA ENTERPRISES INC 101469 1033 BONHAM ST, PARISGASOLINE, DIESEL 1/14/92 2 , 5 E,QHARMAR BOTTLING CO 098727 1303 N MAIN, PARISGASOLINE 4/19/91 2 , 5 E,QJOE GRIZZLE 097269 E HWY 82, BLOSSOMGASOLINE 11/9/90 2 , 2A E,QLAMAR COUNTY 102958 MAIN ST, ROXTONGASOLINE, DIESEL 5/5/92 2 , 2A E,QLAMAR COUNTY 103317 119 N MAIN, PARISGASOLINE 5/5/92 2 , 6 E,QLAMAR COUNTY ELECTRIC COOP 092224 1485 N MAIN, PARISGASOLINE 10/12/88 2A , 1A E,QMACK WILSON PETROLEUM DIST INC 092718 1548 S CHURCH ST, PARISGASOLINE 3/3/89 1B , 1A E,QPHILLIPS LIGHTING 092450 3010 CLARKSVILLE ST, PARISDIESEL 12/22/88 2 , 2A E,QTEXAS DEPT OF PUBLIC SAFETY 098275 2885 N MAIN, PARISGASOLINE 3/12/91 2 , 4 E,QTXDOT 097240 1365 N MAIN, PARISGASOLINE, DIESEL 10/31/90 2 , 6 E,QTXDOT 097243 1365 N MAIN ST, PARISGASOLINE, DIESEL 10/8/90 2 , 6 E,QWRW ENTERPRISES 092135 2205 CLARKSVILLE ST, PARISGASOLINE 8/31/88 2A , 6 E,Q* DAVID ESLINGER096283 521 HALL AVE, LITTLEFIELDGASOLINE 7/25/90 2 , 2A E,QDOUGLASS OIL CO 098737 DELANO ST, LITTLEFIELDGASOLINE 4/23/91 2 , 2A E,QEARTH TEXACO 093334 HWY 70, EARTHGASOLINE 6/27/89 2 , 6 E,QJ L JONES OIL CO 097866 2315 S PHELPS, LITTLEFIELDGASOLINE 10/22/90 2 , 2A E,QLITTLEFIELD ISD 096333 200 N LAKE AVE, LITTLEFIELDGASOLINE 7/25/90 2 , 2A E,QSPADE CO-OP GIN 100161 FM 54, SPADEDIESEL 9/11/91 2A , 6 E,QTNRCC - 117

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LAMBPSTWQDLAMPASASPSTLAVACAPCD/ENFLEELEONPSTPSTPSTLIBERTYPCD/ENFPCD/SUPPST* TOWN & COUNTRY FOOD STORES105128 700 E 9TH ST, LITTLEFIELDGASOLINE 10/16/92 2 , 2A E,Q* TXDOT102263 W LOOP 430, LITTLEFIELDGASOLINE 2/28/92 2 , 2A E,QHIGH PLAINS UWCD NO. 1 SAMPLING PROGRAM 1054205 WELL NO. 10-54-205 (SAMPLE 279-3-8)ATRAZINE 4/17/89 1D,1B , 1B E,Q,V,2BALLOW OIL CO 099969 HWY 281, ADAMSVILLEGASOLINE 8/21/91 2 , 2A E,QEBCO OIL COMPANY 104807 401 S KEY, LAMPASASGASOLINE 9/23/92 2 , 2A E,QSANTA FE RAILWAY 097400 SANTA FE RAILWAY, LOMETADIESEL 11/7/90 2 , 2A E,QTEXAS DEPT OF PUBLIC SAFETY 099965 N HWY 281, LAMPASASGASOLINE 8/23/91 2 , 3 E,QSOUTHERN PACIFIC LINES - YOAKUM 81864 CARRUTH AND PRUITT ST., YOAKUM, TXTPH 8/3/90 3B , 3 E,Q,VCINCO J INVESTMENTS INC 108619 FM 958, YOAKUMGASOLINE 9/15/94 2A , 1A E,QCLARENCE BESETSNY 109532 706 E 4TH ST, HALLETTSVILLEGASOLINE 4/1/95 2A , 1A E,QE J SEIFERT OIL CO 095539 HWY 90, SUBLIMEGASOLINE 7/3/90 2 , 2A E,QFARMCO INC 098559 HWY 77, HALLETTSVILLEGASOLINE 3/12/91 2 , 2A E,QHUBERT SCHULTE 095700 116 N TEXANA, HALLETTSVILLEGASOLINE 5/29/90 2 , 2A E,QKLOESEL HARVEY & DIANE 106537 501 E BOBCAT DR, MOULTONUNKNOWN 4/4/93 2 , 2A E,QPATEK MARVIN 102998 109 E 1ST ST, HALLETTSVILLEGASOLINE, DIESEL, KEROSENE 5/4/92 2 , 3 E,QSSP PARTNERS 111794 106 FAIRWINDS, HALLETSVILLEGASOLINE 1/25/96 2 , 2A E,QEDWIN KISSMANN 098131 607 W AUSTIN, GIDDINGSGASOLINE, WASTE OIL 11/26/90 2 , 2A E,QGLENN MUTSCHER 103086 E HWY 290, GIDDINGSGASOLINE 5/11/92 2 , 2A E,QHOFFMAN GUS 096302 591 E AUSTIN, GIDDINGSGASOLINE 5/29/90 2 , 2A E,QC & S STORES INC 105444 S HWY 79, OAKWOODGASOLINE 11/23/92 2 , 2A E,Q* COMMERCE NATIONAL BANK112113 E HWY 7, MARQUEZGASOLINE 12/30/96 1B , 1A E,QDONALD KENT 110076 HWY 79, OAKWOODGASOLINE 10/24/95 2 , 2A E,QEXXON COMPANY USA 101217 HWY 79, BUFFALOGASOLINE 5/23/91 2 , 2A E,Q* GLICK BROTHERS INC100680 HWY 79, BUFFALOGASOLINE 10/28/91 2A , 2A E,Q* STAR ENTERPRISE098679 IH--45, BUFFALOGASOLINE 3/16/91 2 , 2A E,QSTAR ENTERPRISE 109891 IH-45, CENTERVILLEGASOLINE 1/17/94 2 , 2A E,QSOUTHERN PACIFIC TRANS. CO. - CLEVELAND 39870 US 59 2 MI SOUTH OF CLEVELANDCHLORINATED SOLVENTS 2/15/87 2B , 5 E YPETRO-CHEMICAL SYSTEMS INC. SUPERFUNDSITESOUTH OF LIBERTY, TX. ON FRONTIER PARK RD., 1MILE EAST OF FM 563 AND 7 MILES NORTH OF I-10VOLATILE ORGANIC COMPOUNDS,BTEX5/31/84 3B , 3 E,Q,V,2,3ALLISON FUNERAL HOME 100295 1101 N TRAVIS, LIBERTYGASOLINE 9/20/91 2 , 2A E,QTNRCC - 118

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LIBERTYPSTLIMESTONEPSTLIPSCOMBPSTLIVE OAKENF/WSTIHWPCD/CAPSTWUDALUMA WALL INC 096866 HWY 321, CLEVELANDGASOLINE, DIESEL 7/10/90 2 , 2A E,Q* CIRCLE K CORP107811 306 E HWY 90, DAYTONGASOLINE 11/15/93 2 , 2A E,Q* CLEAR CHANNEL RADIO INC112657 3 MI E OF DEVERS, DEVERSDIESEL 9/5/97 1B , 1A E,Q* DIAMOND SHAMROCK112494 1109 E HOUSTON, CLEVELANDGASOLINE 7/22/97 1B , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 092229 201 S WASHINGTON, CLEVELANDGASOLINE 10/7/88 2 , 2A E,QESTATE OF HILDA DAVIS 111075 MILAM, LIBERTYUNKNOWN 6/4/96 1B , 1A E,Q* FLINTEX OIL111941 701 WASHINGTON, CLEVELANDGASOLINE 11/15/96 1B , 1A E,QHEBERT DISTRIBUTING CO 094600 HWY 90 AT AUSTIN ST, LIBERTYGASOLINE, DIESEL 10/6/89 2 , 2A E,QHEBERT DISTRIBUTING CO 094601 EDGEWOOD, LIBERTYGASOLINE 9/28/89 2 , 2A E,Q* JOHN HEBERT DISTRIBUTORS INC110086 108 E HWY 90, DAYTONUNKNOWN 11/17/95 2 , 2A E,QMOBIL PRODUCING TX & NM 092334 FM 1413, DAYTONGASOLINE 11/18/88 2 , 5 E,Q* NATIONAL CONVENIENCE BANKRUPT112350 1924 HWY 90, LIBERTYGASOLINE 5/30/97 5B , 1A E,Q* STUBBS PETROLEUM CO INC109576 900 N WASHINGTON, CLEVELANDGASOLINE 2/10/95 2A , 1A E,QTULLOS ENTERPRISES 093124 1906 N MAIN, LIBERTYUNKNOWN 5/31/89 2 , 2A E,QTXDOT 101479 207 LAYL DR, LIBERTYGASOLINE, DIESEL 11/11/91 2 , 2A E,QW D MILLER INC 096392 HWY 90, RAYWOODGASOLINE, DIESEL 8/15/89 2 , 3 E,QWILLIAM BISCAMP 109657 LAKESIDE DR, ROMAYERGASOLINE 6/30/95 5B , 1A E,Q* CARLILE CHEVRON112087 201 N ELLIS, GROESBECKUNKNOWN 1/29/97 1B , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 091953 209 E MILAM, MEXIAGASOLINE 5/9/88 2 , 6 E,QTIMMONS K D INC 100478 HWY 14, SEALEGASOLINE 10/7/91 2 , 2A E,QEQUITY COUNTRY INC 096890 109 W SANTA FE, DARROUZETTGASOLINE 8/10/90 2 , 2A E,QDIAMOND SHAMROCK - 3 RIVERS 31553 301 LEROY ST., THREE RIVERS, SAN ANTONIO PETROLEUM HYDROCARBONS 1/15/96 3B , 4 EQV123DIAMOND SHAMROCK - 3 RIVERS 31553 301 LEROY ST., THREE RIVERSJP-5, DIESEL, GASOLINE 10/7/88 3A,3B , 2A,3 E,Q,V,2DIAMOND SHAMROCK - 3 RIVERS 31553 301 LEROY ST., THREE RIVERSJP-5, DIESEL, GASOLINE 10/7/88 3A,3B , 2A,34 E,Q,V,2DIAMOND SHAMROCK REF & MKTG CO 104291 HWY 281, THREE RIVERSGASOLINE 8/20/92 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO108072 304 NUECES, GEORGEWESTGASOLINE 10/21/93 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO108216 HWY 281, THREE RIVERSGASOLINE 1/25/94 2 , 2A E,QDONALD MOORE 099686 600 NUECES, GEORGEWESTGASOLINE, DIESEL 7/23/91 2 , 2A E,QSOUTHMOST TERMINAL INC 100774 IH--37, GEORGE WESTUNKNOWN 10/11/91 2 , 2A E,QCHOKE CANYON WATER SYSTEM 1490025 WHELLER WELL (G1490025B) - S. OF HWY 72 INMCMULLEN COUNTY, 3.5 MILES SW OF CALLIHANBENZENE, TOLUENE, PROPANE,BUTANE, PENTANE,CHLOROMETHANE,CHLOROETHANE,BROMOMETHANE, ISOBUTANE1/11/96 2C , 3B E,Q,V,2TNRCC - 119

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LLANOFODA & D ACRES WATER SUPPLY HWY 261 BUCHANAN DAMTOLUENE, M&P-ZYLENE, O-ZYLENE, NAPTHALUNE, 1,2,4-TRIMETHYLBENZENE, 1,2,5-TRIMETHYLBENZENE, ACETONE,10/31/96 ,PCD/CAPCD/SUPPSTWUDLUBBOCKENF/WSTIHWPCD/CAPCD/VCPSTT H AGRICULTURE & NUTRITION 30818 210 E. TARRANT, LLANOPESTICIDES AND ARSENIC 1/30/89 2B , 2 EQCITY OF KINGSLAND 80842 FM 1431 BETWEEN HWY. 2545 AND HWY. 2900, 1,2 DICHLOROETHANE,KINGSLAND, TXD988088688CHLOROMETHANE,ETHYLBENZENE, TOLUENE1/1/89 2D , 1B E,QCIRCLE K CORP 091843 904 FORD, LLANOGASOLINE 4/19/88 2 , 4 E,QCOUNTY OF LLANO 103700 801 FORD ST, LLANOGASOLINE, DIESEL 5/4/92 2 , 2A E,QHORSESHOE BAY COUNTRY CLUB 099696 PO BOX 7766, HORSESHOE BAYGASOLINE, DIESEL 6/6/91 2 , 3 E,Q* LARY PETROLEUM112090 FM 1422, TOWGASOLINE 12/28/96 2 , 2A E,Q YLSI - CIRCK 3852 101356 406 E YOUNG, LLANOGASOLINE 8/8/91 2 , 2A E,Q* MARVIN BROWN111263 HWY 261, BLUFFTONGASOLINE 6/26/96 2A , 1A E,QSECURITY STATE BANK & TRUST 102571 FM 1431, KINGSLANDGASOLINE 4/6/92 2 , 2A E,QSTROEHER & SON INC 092656 411 MOORE DR, KINGSLANDGASOLINE 12/22/88 5B , 1A E,QTHOMAS M. TIETZ-DECEASED 093576 HWY 29, BUCHANAN DAMGASOLINE 9/4/89 5B , 1A E,QUNKNOWN 091262 BUCHANAN DAM, BUCHANAN DAMUNKNOWN 3/27/87 5B , 1A E,QVILLAGE AT KINGSLAND, THE 1500100 WELL 2 (G1500100B) - AT THE FIRE STATION W. OF TRICHLOROETHENE,INTERSECTION OF HWYS 2900 AND 1431TETRACHLOROETHENE, CIS 1,2-DICHLOROETHENE8/15/90 2C , 5 E,Q,V,2LUBBOCK ELECTROCOATING/WILKERSON 52129 1716 AVE. E., LUBBOCK1,1,1 TRICHLOROEHYLENE 7/11/89 3B , 4 EVREESE AIR FORCE BASE 62005 6 MILES WEST OF LUBBOCKF001, F002, BTEX, ORGANICS 9/12/88 3A , 2,3,4 E,Q,V,2,3LUBBOCK POWER AND LIGHT - HOLLY STREET 37374 3500 E SLAYTON, LUBBOCKNO. 2 FUEL OIL 3/1/94 0 , 4 EREESE AIR FORCE BASE 62005 6 MILES WEST OF LUBBOCKF001, F002, BTEX, ORGANICS 9/12/88 3A , 1A,2A E,Q,V,2,3TEXACO REFG & MKTG INC. - LUBBOCK 33445 3002 CLOVIS, LUBBOCKGASOLINE CONSTITUENTS 6/1/88 2 , 4 E* UNIVERSITY PLAZA653 1001 UNIVERSITY AVENUE, LUBBOCKCL SOLVENTS 11/14/97 0 , 2 EACUFF BUTANE COMPANY 092298 FM 40, ACUFFGASOLINE 11/16/88 5B , 1A E,QALVARADO RAUL & JOSIE 096612 223 N UNIVERSITY, LUBBOCKGASOLINE 8/22/90 5B , 1A E,QAMWEST SAVINGS 097970 5002 AVE U, LUBBOCKGASOLINE 2/8/91 2 , 2A E,QANADARKO DEVELOPMENT CO. 092007 3704 34TH, LUBBOCKGASOLINE 7/13/88 2 , 4 E,QATEX GAS, INC. 093099 1956 34TH ST, LUBBOCKGASOLINE 5/30/89 2 , 3 E,QBALCH OIL CO 097529 1550 34TH ST, LUBBOCKGASOLINE 11/23/90 2 , 2A E,QBALCH OIL CO 101169 920 9TH ST, SLATONGASOLINE 12/9/91 2 , 2A E,QBALCH OIL CO 108860 HWY 84, SLATONGASOLINE 11/16/94 2 , 2A E,Q* BALCH OIL CO INC111587 INDUSTRIAL DR, SLATONGASOLINE, DIESEL 8/7/96 2 , 2A E,QTNRCC - 120

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LUBBOCKPSTBARTLETT HENRY 093149 2601 34TH ST, LUBBOCKGASOLINE 5/24/89 2 , 2A E,QBENTON OIL CO 091532 4553 BROWNFIELD HWY, LUBBOCKGASOLINE 11/9/87 2 , 2A E,QBENTON OIL CO 094114 3723 19TH ST, LUBBOCKGASOLINE 11/20/89 2 , 4 E,QBENTON OIL CO 095806 2902 PARKWAY, LUBBOCKGASOLINE 5/29/90 2 , 2A E,QBENTON OIL CO 096220 LUBBOCK REG AIRPORT, LUBBOCKJET FUEL 6/20/90 2A , 6 E,QBENTON OIL CO 096752 3702 AVE A, LUBBOCKDIESEL 9/18/90 2 , 2A E,QBENTON OIL CO 098416 58TH, LUBBOCKGASOLINE 3/7/91 2 , 2A E,QBENTON OIL CO 104676 2705 AVE Q, LUBBOCKGASOLINE 9/15/92 2 , 2A E,QBENTON OIL CO 107702 LOOP 461, NEW DEALGASOLINE 1/17/94 2 , 2A E,Q* BERGSTEIN OIL SERVICES107458 2416 ERSKINE, LUBBOCKGASOLINE 11/4/93 2 , 2A E,QBOBBY JOE REED 104647 806 CLOVIS RD, SHALLOWATERGASOLINE 9/11/92 2 , 2A E,QBOLTON OIL CO 092060 2116 50TH ST, LUBBOCKGASOLINE 7/12/88 2 , 2A E,QBOLTON OIL CO 095557 3709 AVE Q, LUBBOCKGASOLINE 2/14/90 2 , 2A E,QBOLTON OIL CO 096845 4250 AVE A, LUBBOCKDIESEL 9/28/90 2 , 2A E,QBOLTON OIL CO 101338 4511 AVE Q, LUBBOCKGASOLINE 12/17/91 2 , 2A E,QBOLTON OIL CO 102131 2167 50TH ST, LUBBOCKGASOLINE 3/3/92 2 , 2A E,QBOLTON OIL CO 103208 4416 50TH, LUBBOCKGASOLINE 5/15/92 2 , 2A E,QBOLTON OIL CO 104389 2702 AVE O, LUBBOCKGASOLINE 8/25/92 2 , 2A E,QBOLTON OIL CO 111769 5622 BROWNFIELD HWY, LUBBOCKGASOLINE 9/13/96 2 , 2A E,QBORDEN INC 094334 519 AVE J, LUBBOCKDIESEL 9/29/89 5B , 1A E,QBRIDGESTONE/FIRESTONE INC 092824 6002 SLIDE RD, LUBBOCKGASOLINE 3/28/89 2 , 2A E,QC.E. BRAY 094309 3334 34TH, LUBBOCKGASOLINE 11/20/89 2 , 4 E,QC.E. BRAY 094310 3538 34TH, LUBBOCKGASOLINE 11/22/89 2 , 2A E,QCAVALCADE DEVELOPMENT, L.P. 096653 3001 50TH ST, LUBBOCKGASOLINE, WASTE OIL 8/27/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092160 5735 W 19TH ST, LUBBOCKGASOLINE 9/16/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108529 1401 ERSKINE ST, LUBBOCKOTHER 10/1/88 2 , 2A E,QCHRYSLER REALTY CORP 108211 4611 AVE Q, LUBBOCKOTHER 5/6/94 2A , 1A E,QCITY OF LUBBOCK 092462 5TH ST, LUBBOCKDIESEL 1/3/89 5B , 1A E,QCITY OF LUBBOCK 093153 5TH ST, LUBBOCKGASOLINE 5/25/89 5B , 1A E,QCITY OF LUBBOCK 093157 5TH ST, LUBBOCKGASOLINE 5/24/89 5B , 1A E,QCITY OF LUBBOCK 093557 AVE J, LUBBOCKDIESEL 6/30/89 5B , 2A E,QCITY OF LUBBOCK 094822 324 MUNICIPAL, LUBBOCKGASOLINE 1/30/90 2 , 2A E,QCITY OF LUBBOCK 098622 8401 AVE Q, LUBBOCKGASOLINE 1/15/91 2 , 2A E,QCITY OF LUBBOCK 102845 801 TEXAS AVE, LUBBOCKUNKNOWN 4/28/92 2 , 2A E,QCLARK F B MRS 096368 40TH ST, LUBBOCKGASOLINE 7/31/90 2A , 6 E,QCONLEY LOTT NICHOLS MACHINERY 094391 3601 AVE H, LUBBOCKGASOLINE 12/15/89 2 , 2A E,QCONTINENTAL AIRLINES INC 106584 LUBBOCK INTL AIRPORT, LUBBOCKJET FUEL 4/20/93 2 , 2A E,QCOPLAND KENT & DOZIER KEN 103949 RT 3, LUBBOCKAV-GAS 7/14/92 2 , 2A E,Q* DERREL BOEPPLE112809 FM 1294, LUBBOCKGASOLINE, DIESEL 11/24/97 1B , 1A E,QDURHAM PETER 098893 1702 34TH ST, LUBBOCKGASOLINE 5/7/91 2A , 2A E,QE Z MART STORES INC 092862 7402 QUAKER, LUBBOCKGASOLINE 4/24/89 2 , 4 E,QE Z MART STORES INC 099467 4202 19TH ST, LUBBOCKGASOLINE 6/20/91 2 , 2A E,QE Z MART STORES INC 103213 2200 DIVISION ST, SLATONGASOLINE 5/4/92 2 , 4 E,QE Z MART STORES INC 104724 5719 66TH ST, LUBBOCKGASOLINE 9/14/92 2 , 2A E,QEDDINS WALCHER CO 103445 5002 SOUTHEAST DR, LUBBOCKGASOLINE, KEROSENE, OTHER 6/8/92 2 , 2A E,QENVIROSOURCE MGMT. CORP. 097272 2604 TEXAS AVE, LUBBOCKDIESEL 10/22/90 2 , 6 E,QEXXON COMPANY USA 092717 1656 BROADWAY AVE, LUBBOCKGASOLINE 10/28/88 2 , 6 E,QEXXON COMPANY USA 093219 4328 50TH, LUBBOCKGASOLINE 6/20/89 2 , 6 E,QTNRCC - 121

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LUBBOCKPSTEXXON COMPANY USA 099637 4847 SLIDE RD, LUBBOCKGASOLINE 5/23/91 2 , 6 E,QFAULK ROBERT DR 094955 3601 34TH ST, LUBBOCKGASOLINE 2/16/90 2 , 2A E,QFIELDS AND COMPANY 107303 1613 5TH ST, LUBBOCKGASOLINE 9/27/93 2 , 2A E,QFINA OIL & CHEMICAL CO 099841 HWY 84, SLATONGASOLINE, DIESEL 7/29/91 2 , 2A E,QFLEMING CO. INC. 099023 5824 ELM ST, LUBBOCKGASOLINE 2/22/91 2 , 2A E,QFLEMING COMPANIES INC 095019 508 50TH, LUBBOCKDIESEL 2/26/90 2 , 4 E,QFLEMMING COMPANIES INC 106585 53RD, LUBBOCKDIESEL, WASTE OIL 4/30/93 2 , 2A E,QFRANK HODGES 099128 7902 CEDAR AVE, LUBBOCKGASOLINE 5/20/91 5B , 2A E,QFRENSHIP ISD 107357 400 MAIN ST, WOLFFORTHDIESEL, GASOLINE 10/12/93 2 , 2A E,QFRONTIER WHOLESALE CO INC 095745 833 E 40TH ST, LUBBOCKGASOLINE, DIESEL 5/31/90 2 , 2A E,Q* FSO FACILITIES SERVICE OFFICE101485 1515 AVE G, LUBBOCKGASOLINE 1/10/92 2 , 2A E,QGABBERT OIL CO 107358 7401 UNIVERSITY, LUBBOCKGASOLINE 10/20/93 2 , 2A E,QGALBRAITH WHOLESALE 095530 4225 AVE A, LUBBOCKGASOLINE 5/3/90 2 , 2A E,QGESKOS CHRIS 100934 1902 34TH ST, LUBBOCKGASOLINE 11/6/91 1B , 1A E,Q* GIBSON PLUMBING, INC107269 5279 34TH ST, LUBBOCKGASOLINE 9/7/93 2 , 2A E,QGRABBER CONSTRUCTION 108118 3045 CLOVIS RD, LUBBOCKOTHER 4/21/94 1B , 1A E,QGREYHOUND LINES INC 100614 1313 13TH ST, LUBBOCKUNKNOWN 10/11/91 2 , 2A E,QGROUX BILL 105345 7002 INDIANA, LUBBOCKUNKNOWN 11/18/92 2 , 2A E,QHEATH TRUCKING 104797 2909 AVE C, LUBBOCKDIESEL, WASTE OIL 9/10/92 2 , 2A E,QHENRY BARTLETT 093156 2555 34TH ST, LUBBOCKGASOLINE 5/24/89 2 , 2A E,QHIGH PLAINS WATER CONSV DIST1 096766 2930 AVE Q, LUBBOCKGASOLINE 8/27/90 2 , 2A E,QHOLLAND GARDENS 110224 4315 50TH, LUBBOCKGASOLINE 1/3/96 2 , 2A E,QHOLLINGSWORTH LONNIE 107379 4202 BOSTON, LUBBOCKGASOLINE 10/26/93 2 , 2A E,QHORKEY OIL 105576 50TH, LUBBOCKGASOLINE 11/9/92 2 , 2A E,QHORKEY OIL CO INC 093642 620 19TH ST, LUBBOCKGASOLINE 9/7/89 2 , 2A E,QHORKEY OIL CO INC 097274 406 ERSKINE RD, LUBBOCKDIESEL 11/5/90 2 , 2A E,QHORKEY OIL CO INC 099881 5643 BROWNFIELD HWY, LUBBOCKGASOLINE 8/9/91 2 , 2A E,QHORKEY OIL CO INC 100515 1511 UNIVERSITY DR, LUBBOCKGASOLINE 10/1/91 2 , 2A E,QHORKEY OIL CO INC 102659 5616 SLIDE RD, LUBBOCKGASOLINE 8/28/91 2 , 2A E,QHORKEY OIL CO INC 102824 50TH, LUBBOCKGASOLINE, WASTE OIL 4/6/92 2 , 2A E,QHORKEY OIL CO INC 109406 6601 UNIVERSITY, LUBBOCKGASOLINE 4/10/95 2 , 2A E,QHORKEY OIL CO INC 111923 4350 19TH ST, LUBBOCKGASOLINE 11/20/96 2 , 2A E,QHORN JUANITA 093077 2203 CLOVIS RD, LUBBOCKGASOLINE 5/12/89 5B , 1A E,QIDALOU CO-OP GIN CO 098628 HWY 62, IDALOUGASOLINE 4/4/91 2 , 2A E,QINCE OIL 104086 3602 50TH ST, LUBBOCKGASOLINE 7/22/92 2 , 2A E,QINCE OIL CO INC 093680 2602 34TH ST, LUBBOCKGASOLINE 7/20/89 2 , 2A E,QJ W BUSH 093388 7213 W 19TH ST, LUBBOCKGASOLINE 6/27/89 2 , 2A E,QJET 66 109128 FM 1585, LUBBOCKGASOLINE 2/9/95 2 , 2A E,QJOHN GIANNATTASIO 097318 405 30TH ST, LUBBOCKGASOLINE 11/19/90 2 , 4 E,QLASHOMB EUGENE 092951 3501 34TH ST, LUBBOCKGASOLINE 5/9/89 5B , 1A E,QLEFTWICH & OLIVER 109616 601 N IH-27, LUBBOCKGASOLINE 6/6/95 2A , 1A E,QLEWIS & CHAPMAN 096442 MAIN & AVENUE K, LUBBOCKGASOLINE 8/10/90 2 , 2A E,QLIBERTY CO-OP GIN 103376 FM 1294, LUBBOCKGASOLINE, DIESEL 6/2/92 2 , 2A E,QLONNIE HOLLINGSWORTH 093247 3001 34TH ST, LUBBOCKGASOLINE 6/23/89 2 , 2A E,QLOWRIMORE JOHN 093387 811 UNIVERSITY, LUBBOCKGASOLINE 6/5/89 5B , 1A E,QLUBBOCK AERO 099662 LUBBOCK INTL AIRPORT, LUBBOCKGASOLINE 12/15/90 2 , 6 E,QLUBBOCK BUILDING PRODUCTS 095176 214 AVE M, LUBBOCKDIESEL 3/6/90 2 , 2A E,QLUBBOCK COUNTY 094611 801 8TH ST, SHALLOWATERGASOLINE 1/18/90 2 , 2A E,QTNRCC - 122

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LUBBOCKPSTLUBBOCK COUNTY 109534 800 BROADWAY, LUBBOCKGASOLINE, DIESEL 5/19/95 2A , 2A E,QLUBBOCK FEEDLOT INC 095556 6601 SOUTHEAST DR, LUBBOCKGASOLINE 4/17/90 2 , 2A E,QLUBBOCK ISD 101002 2004 19TH ST, LUBBOCKWASTE OIL 11/14/91 2A , 1A E,QMACS OLDS PONTIAC & GMC, INC. 109110 HWY 84 SLATON BYPASS, SLATONGASOLINE 1/16/95 2 , 2A E,QMARLIN HAYHURST 097261 1118 16TH ST, LUBBOCKGASOLINE 11/9/90 2 , 2A E,QMASSEY MOTORS 098624 4402 AVE Q, LUBBOCKGASOLINE 4/12/91 2 , 2A E,QMAYFIELD MOVING & STORAGE 092061 1333 E 44TH ST, LUBBOCKGASOLINE 12/15/87 2 , 2A E,QMCCLAIN OIL CO 096007 98TH ST, LUBBOCKGASOLINE 6/28/90 2 , 2A E,QMCCLAIN OIL INC 111875 302 19TH ST, LUBBOCKGASOLINE 11/5/96 2 , 2A E,QMCCLAIN OIL INC 111876 301 AVE H, LUBBOCKGASOLINE 11/5/96 2 , 2A E,QMCKESSON WATER PRODUCTS CO 091110 405 AVE U, LUBBOCKGASOLINE 8/19/86 2 , 4 E,QMCLAIN OIL CO 093155 1702 N UNIVERSITY, LUBBOCKGASOLINE 5/22/89 2 , 2A E,QMCLAIN OIL CO 097361 2323 4TH ST, LUBBOCKGASOLINE 10/30/90 5B , 2A E,QMCLAIN OIL CO 104845 3314 4TH, LUBBOCKGASOLINE 9/16/92 2 , 2A E,QMCLAIN OIL CO 108645 724 BROWNFIELD HWY, WOLFFORTHGASOLINE 9/22/94 2 , 2A E,QMCLAIN OIL CO 108854 3034 SLIDE RD, LUBBOCKGASOLINE 11/18/94 2 , 2A E,QMCLAIN OIL CO 109194 5201 80TH STREET, LUBBOCKGASOLINE 2/15/95 2 , 2A E,QMERCHANTS FAST MOTOR LINES 093997 4201 MARTIN LUTHER KING BLVD, LUBBOCKGASOLINE 9/27/89 2 , 4 E,QMETHODIST HOSPITAL 097864 3615 19TH ST, LUBBOCKDIESEL 1/17/91 2A , 1A E,QMETHODIST HOSPITAL LUBBOCK 110083 3801 19TH ST, LUBBOCKHYDR FLUID 3/13/95 1B , 1A E,QMIDTOWN PRESS INC 095665 1602 TEXAS AVE, LUBBOCKGASOLINE 5/24/90 2 , 2A E,QMISTLETOE TEX PACK EXPRESS 103634 702 E 40TH ST, LUBBOCKGASOLINE, DIESEL 6/24/92 2A , 1A E,Q* MOBIL BUSINESS RESOURCE CORP112465 4923 AVE Q, LUBBOCKUNKNOWN 7/14/97 1B , 1A E,QMRS BAIRDS BAKERY 093526 202 BROADWAY, LUBBOCKGASOLINE 8/18/89 2 , 4 E,Q* NEEDLES BELVERD E JR105548 1502 AVE H, LUBBOCKGASOLINE 12/10/92 2 , 2A E,QNOEL J EDWARDS 095330 3801 34TH ST, LUBBOCKGASOLINE 2/1/90 2 , 6 E,QO K KWIK STOP 096765 508 5TH ST, WOLFFORTHGASOLINE 8/23/90 2 , 6 E,QP A JACOB 093996 3002 34TH ST, LUBBOCKGASOLINE 10/31/89 2 , 2A E,QPAGE & ASSOC CONSTRUCTION CO 093098 4405 CLOVIS RD, LUBBOCKGASOLINE 6/1/89 2 , 2A E,QPALMER BROTHERS 098283 6201 W 19TH ST, LUBBOCKGASOLINE 3/11/91 2 , 2A E,QPANHANDLE-SOUTH PLANS FAIR 105577 818 AVE A, LUBBOCKGASOLINE, WASTE OIL 11/23/92 2 , 2A E,QPARAGON INVESTMENT CORPORATION 097957 4115 BROWNFIELD HWY, LUBBOCKGASOLINE 2/1/91 2 , 6 E,QRAILTON 095937 1901 HARVARD RD, LUBBOCKGASOLINE 6/13/90 1B , 1A E,QRALPH CARLISLE MOTORS 100703 4302 AVE Q, LUBBOCKGASOLINE 10/24/91 2 , 2A E,QRED ARROW FREIGHT LINES 100992 128 E 13TH ST, LUBBOCKDIESEL, WASTE OIL 11/19/91 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 095642 1919 TEXAS AVE, LUBBOCKGASOLINE 4/18/90 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 096990 1502 19TH ST, LUBBOCKGASOLINE 10/10/90 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 097712 4702 4TH ST, LUBBOCKGASOLINE 1/7/91 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 098957 5002 AVE A, LUBBOCKGASOLINE 5/15/91 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 103652 HWY 84, SHALLOWATERGASOLINE, DIESEL, WASTE OIL 6/12/92 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 104558 1414 AVE L, LUBBOCKGASOLINE 9/2/92 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 104956 DOWDEN RD, WOLFFORTHGASOLINE 9/24/92 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 106484 4601 34TH ST, LUBBOCKGASOLINE 4/13/93 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 107596 LOOP 289, LUBBOCKGASOLINE 12/17/93 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 109989 4609 AVE A, LUBBOCKGASOLINE, DIESEL 10/13/95 2 , 2A E,QROBERT HEATH TRUCKING INC 102312 1201 E 40TH ST, LUBBOCKDIESEL 3/13/92 2 , 2A E,QROY GEORGE ESTATE 093876 2801 FORDHAM, LUBBOCKGASOLINE 10/9/89 2 , 2A E,QS B CAMPBELL JR TRUCKING CO 092233 3906 (FORMER) QUIRT AVE, LUBBOCKGASOLINE 10/21/88 5B , 1A E,QTNRCC - 123

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LUBBOCKPSTSHING KAN HON 108326 3535 34TH ST, LUBBOCKGASOLINE 6/26/94 2 , 2A E,QSIMMONS PUMP CORP 091780 2803 AVE H, LUBBOCKGASOLINE 3/24/88 2 , 3 E,QSIMMONS PUMP CORP 097362 2605 AVE H, LUBBOCKGASOLINE 10/31/90 2 , 2A E,QSOUTH PLAINS ELECTRIC COOP 098806 110 N IH--27, LUBBOCKGASOLINE, WASTE OIL 4/18/91 2 , 5 E,QSOUTH PLAINS TELEPHONE COOP 096605 2425 MARSHALL ST, LUBBOCKGASOLINE 8/21/90 2 , 3 E,QSOUTHLAND CORP 097477 2902 4TH ST, LUBBOCKGASOLINE 12/3/90 2 , 2A E,QSOUTHLAND CORP 097586 2102 50TH ST, LUBBOCKGASOLINE 12/13/90 2A , 6 E,QSOUTHLAND CORP 097587 8126 UNIVERSITY, LUBBOCKGASOLINE 12/12/90 2 , 3 E,QSOUTHLAND CORP 100803 4601 BROWNFIELD HWY, LUBBOCKGASOLINE 11/5/91 2 , 2A E,QSOUTHLAND CORP 101386 802 AVE Q, LUBBOCKGASOLINE 12/19/91 2 , 2A E,QSOUTHLAND CORP 106497 2608 AVENUE Q, LUBBOCKGASOLINE 4/6/93 2 , 2A E,QSOUTHLAND CORP 107855 3802 34TH STREET, LUBBOCKGASOLINE 7/19/93 2 , 3 E,QSOUTHWEST CONVENIENCE STORES 101410 3402 UNIVERSITY, LUBBOCKGASOLINE 12/19/91 2 , 2A E,QSOUTHWEST CONVENIENCE STORES 109121 5710 4TH ST, LUBBOCKGASOLINE 2/1/95 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 100996 1405 MAIN ST, LUBBOCKDIESEL 11/7/91 2 , 2A E,QSPELCE ENTERPRISES INC 100125 1405 AVE A, LUBBOCKGASOLINE 9/10/91 5B , 1A E,QSPELCE ENTERPRISES INC 100126 103 E BROADWAY, LUBBOCKGASOLINE, DIESEL 9/10/91 5B , 1A E,QSTEERE TANK LINES INC 093332 1501 N GARY AVE, LUBBOCKDIESEL 7/17/89 2 , 3 E,QSUPERIOR BAG & SUPPLY 097116 4640 34TH ST, LUBBOCKGASOLINE 11/1/90 5B , 1A E,QTEXACO REFINING & MARKETING 091944 928 SLIDE RD, LUBBOCKGASOLINE 5/24/88 2 , 2A E,QTEXACO REFINING & MARKETING 096322 1415 UNIVERSITY, LUBBOCKGASOLINE 7/20/90 2A , 2A E,QTEXACO REFINING & MARKETING 096694 4257 34TH ST, LUBBOCKGASOLINE 9/4/90 2 , 2A E,QTEXACO REFINING & MARKETING 097094 3311 AVE Q, LUBBOCKGASOLINE 10/19/90 2 , 2A E,QTEXACO REFINING & MARKETING 097530 4401 50TH ST, LUBBOCKGASOLINE 10/26/90 2 , 2A E,QTEXACO REFINING & MARKETING 098690 5002 SLIDE RD, LUBBOCKGASOLINE 4/18/91 2 , 4 E,QTEXACO REFINING & MARKETING 106805 2815 SLIDE RD, LUBBOCKGASOLINE 6/10/93 2 , 2A E,QTEXAS GASMAN L.P. 108724 7301 BROWNFIELD HWY, LUBBOCKGASOLINE 10/3/94 2 , 2A E,QTEXAS ROOFING CO 096715 1902 AVE F, LUBBOCKGASOLINE 9/17/90 2 , 2A E,QTEXAS TECH UNIVERSITY 094308 BROADWAY, LUBBOCKGASOLINE 11/28/89 2 , 2A E,QTEXAS TECH UNIVERSITY 104542 9TH, LUBBOCKDIESEL 9/8/92 2 , 2A E,QTOWN & COUNTRY FOOD STORES 093851 2025 CLOVIS RD, LUBBOCKGASOLINE 9/29/89 2 , 4 E,QTOWN & COUNTRY FOOD STORES 100291 2510 QUIRT, LUBBOCKGASOLINE 8/6/91 2 , 2A E,Q* TOWN & COUNTRY FOOD STORES107218 5801 19TH ST, LUBBOCKGASOLINE 8/27/93 2 , 2A E,QTOWN & COUNTRY FOOD STORES 107268 7753 W 19TH ST, LUBBOCKGASOLINE 9/10/93 2 , 6 E,QTOWN & COUNTRY FOOD STORES INC 110397 3901 AVE A, LUBBOCKGASOLINE 1/12/96 2 , 2A E,QTOWN & COUNTRY FOOD STORES, IN 098650 6519 UNIVERSITY, LUBBOCKGASOLINE 4/4/91 2 , 2A E,QTOWNSEND STRONG INC 093471 918 E 50TH ST, LUBBOCKGASOLINE 7/13/89 2 , 4 E,QTOWNSEND STRONG INC 093753 2901 SLIDE RD, LUBBOCKGASOLINE 8/11/90 2 , 2A E,QTOWNSEND STRONG INC 096786 2602 PARKWAY, LUBBOCKGASOLINE, WASTE OIL 9/19/90 2 , 2A E,QTOWNSEND STRONG INC 097259 FM 40, LUBBOCKGASOLINE 11/1/90 2 , 2A E,QTOWNSEND STRONG INC 098445 HWY 1585, WOLFFORTHGASOLINE 3/13/91 2 , 2A E,QTOWNSEND STRONG INC 101892 TAHOKA HWY, LUBBOCKGASOLINE 2/5/92 2 , 2A E,QTOWNSEND STRONG INC 106021 6530 FRANKFORD, LUBBOCKGASOLINE 2/2/93 2A , 1A E,QTOWNSEND STRONG INC 108173 3618 34TH ST, LUBBOCKGASOLINE 5/13/94 2 , 2A E,QTOWNSEND STRONG INC 109665 1755 S 9TH ST, SLATONGASOLINE 6/27/95 2 , 2A E,QTOWNSEND STRONG INC 110293 110 UNIVERSITY, LUBBOCKGASOLINE 1/16/96 2A , 1A E,QTOWNSEND STRONG INC 111829 5605 BROWNFIELD HWY, LUBBOCKUNKNOWN 2 , 6 E,Q* TOWNSEND STRONG INC111830 1320 E BROADWAY, LUBBOCKUNKNOWN 11/1/96 2 , 2A E,QTNRCC - 124

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LUBBOCKPSTWQDWUD* TOWNSEND STRONG INC112213 3664 50TH ST, LUBBOCKUNKNOWN 4/4/97 2 , 2A E,Q* TOWNSEND STRONG INC112214 5801 4TH ST, LUBBOCKGASOLINE 3/19/97 2 , 2A E,Q* TOWNSEND STRONG INC112215 2618 50TH ST, LUBBOCKGASOLINE 3/17/97 2 , 2A E,QTOWNSEND-STRONG INC 109824 323 UNIVERSITY, LUBBOCKGASOLINE 8/24/95 2 , 2A E,QTUCKER OIL CO 097258 850 S 9TH ST, SLATONGASOLINE 4/3/90 2 , 2A E,QTUCKER OIL COMPANY INC 099858 HWY 87, WOODROWGASOLINE 8/6/91 2A , 1A E,QTXDOT 094807 3202 AVE H, LUBBOCKGASOLINE 2/6/90 2 , 3 E,QTXDOT 094816 2901 TEXAS AVE, LUBBOCKGASOLINE, WASTE OIL 2/5/90 1B , 1A E,QTXDOT 094829 802 38TH ST, LUBBOCKGASOLINE 2/5/90 2 , 2A E,Q* TXDOT101748 601 SLATON RD, LUBBOCKGASOLINE, DIESEL 1/17/92 2 , 2A E,QTXDOT 102125 308 MUNICIPAL DR, LUBBOCKGASOLINE, DIESEL 2/6/92 2 , 3 E,QTXDOT 104474 2705 NE LOOP 289, LUBBOCKGASOLINE, DIESEL, KEROSENE 8/3/92 2 , 6 E,QUNITED PARCEL SERVICE 103951 515 E 44TH, LUBBOCKGASOLINE 6/19/92 2 , 2A E,QUNIVERSITY MEDICAL CENTER 096036 602 INDIANA, LUBBOCKJET FUEL 6/21/90 2 , 2A E,QUNKNOWN 102823 SHALLOWATERGASOLINE, DIESEL, CHEMICAL 5/22/92 2A , 1A E,Q* UNKNOWN112706 4TH, LUBBOCKUNKNOWN 10/10/97 1B , 1A E,Q* UNKNOWN112732 WOODROW & HWY 87, WOODROWUNKNOWN 10/23/97 5B , 1A E,QWEST TEXAS GAS INC 102052 308 E BROADWAY, DENVER CITYGASOLINE 3/5/92 2 , 2A E,QWEST TEXAS WAREHOUSE INC 093221 2501 AVE C, LUBBOCKDIESEL 6/21/89 2A , 1A E,Q* WESTERN MARKETING104210 98TH, LUBBOCKGASOLINE 8/13/92 2 , 2A E,QWESTERN MARKETING INC 109960 4102 34TH ST, LUBBOCKGASOLINE 8/29/95 2 , 2A E,QWESTERN MARKETING INC 111873 4701 AVE H, LUBBOCKGASOLINE 11/4/96 2 , 2A E,QWESTERN MARKETING INC 111874 1101 34TH ST, LUBBOCKGASOLINE 11/4/96 2 , 2A E,QWHITE SWAN INC 100230 915 E 50TH ST, LUBBOCKDIESEL 8/22/91 2 , 4 E,QWILLIAMSON RALPH 094557 HWY 87, LUBBOCKGASOLINE 1/2/90 2 , 3 E,QWRIGHT WRIGHT THACKER & PEELER 095333 19TH, LUBBOCKGASOLINE 3/27/90 2 , 2A E,QYOUNG-BAKER ENTERPRISES 093987 2143 19TH ST, LUBBOCKGASOLINE 10/31/89 2 , 2A E,QCITY OF LUBBOCK WQ10353-02 EASTERN TERMINUS OF 38TH STREET JUST SOUTHOF THE FORT WORTH AND DENVER RAILROADCROSSING OF DOUBLE MNT.FORT BRAZOS RIVER,EAST LUBBOCK COUNTY. (GRAY FARMS SITE)NITRATE 1/1/68 3A,B , 4,5 E,Q,VHIGH PLAINS UWCD NO. 1 SAMPLING PROGRAM 2327904 WELL NO. 23-27-904 (SAMPLE 303-1-3)DIURON 4/10/89 1D,1B , 1B E,Q,V,2LIBERTY CO-OP GIN 1520111 (G1520111A) - 280 FT S. OF FM 1294; 4 MILES E OF I- BTEX 10/13/95 2C , 5 E,Q,V,227; S OF GIN OFFICE IN LIBERTYSHALLOWATER, CITY OF 1520003 WELL 1 (G1520003A) - 7TH AND TEXAS1,2 DICHLOROETHANE, ETHYLENEDIBROMIDE1/16/90 2C , 5 E,Q,V,2LYNNENF/WTRPSTCITY OF LUBBOCK 10353 HANCOCK FARM SITE; 1 MI. N OF WILSONNITRATE 3A , 5B E,Q,VBALCH OIL CO 101339 PO BOX , NEW HOMEGASOLINE 12/20/91 2 , 2A E,Q* INCE OIL CO INC112143 HWY 87 BYPASS, ODONNELLGASOLINE, HYDR FLUID 2/18/97 2 , 2A E,QLYNN COUNTY FUEL ASSOC 108819 1208 LOCKWOOD, TAHOKAGASOLINE, DIESEL 11/3/94 5B , 1A E,QMAURICE JACKSON 110751 700 DOAK ST, ODONNELLUNKNOWN 4/9/96 2 , 2A E,QO'DONNELL ISD 098629 501 5TH ST, ODONNELLGASOLINE 4/2/91 2 , 2A E,QO'DONNELL OIL & BUTANE CO 093078 700 DOAK ST, ODONNELLDIESEL 5/22/89 2 , 2A E,QTNRCC - 125

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236LYNNPSTWQDWUDTOM HEINRICH 101749 MAIN ST, WILSONGASOLINE, DIESEL 1/27/92 2 , 2A E,QTXDOT 108903 FM 1730, NEW HOMEGASOLINE, DIESEL 12/9/94 2A , 1A E,QWALKER SIMS OIL CO INC 092633 1028 AVE J, TAHOKAGASOLINE 2/14/89 2 , 2A E,QWOODRUM OIL CO 094824 N 9TH, ODONNELLGASOLINE 1/24/90 5B , 2A E,QTDA PESTICIDE SURVEY 2456601 WELL NO. 24-56-601 (SAMPLES REP 1, REP 2) "LYNN PICLORAM 7/28/88 2D , 1 V,2,31"WILSON, CITY OF 1530003 WELL 4 (G1530003C) - SW OF WELLHAUSEN AVE. & CARBON TETRACHLORIDE 4/19/90 2C , 5 E,Q,V,2NW OF HWY 440, AND WELL 7 (G1530003F) - NW OFHWY 440 AT SW EDGE OF CITY OF WILSONMADISONPSTMARIONPSTMARTINMASONPSTWQDPSTMATAGORDAENF/WSTPCD/CAPSTUNKNOWN 091079 HWY 21, MADISONVILLEGASOLINE 5/6/86 5B , 6 E,QDUNCAN THOMPSON PETROLEUM 097086 HWY 59, JEFFERSONGASOLINE 10/11/90 2A , 2A E,Q* E Z MART112120 1015 S KAUFMAN, ENNISGASOLINE 2/7/97 1B , 1A E,QBLOCKER OIL COMPANY 091258 N FRONT, STANTONGASOLINE 1/1/80 5B , 1A E,QFINA OIL & CHEMICAL CO 092591 IH-20, STANTONGASOLINE 1/27/89 2 , 6 E,QTXDOT 099011 N HWY 137, STANTONGASOLINE, DIESEL 3/12/91 2 , 2A E,QPERMIAN BASIN (MARTIN CO) UWCD SAMPLING 2841201 WELL NO. 28-41-201 (SAMPLE GW 01919)HEPTACHLOR EPOXIDE 11/19/90 1D,1B , 1B E,Q,V,2PROGRAMTDA PESTICIDE SURVEY KNOTT AREA #2; 10 WELLS IN MARTIN COUNTY (28-34-701; 28-35-503, 504, 505, 804, 813, & 814; 28-42-301;28-43- 202 & 203)ARSENIC 4/6/88 2D , 1 E,Q,V,2TDA PESTICIDE SURVEY 2835701 WELL NO. 28-35-701 (NO SAMPLE NO. GIVEN)TRICLOPYR, ARSENIC 4/26/88 2D , 1 V,2,3"MARTIN 3"LOEFFLER OIL CO 103069 405 SAN ANTONIO HWY, MASONGASOLINE 5/5/92 2 , 2A E,QHU-MAR CHEMICALS, INC. 31171 PALACIOSORGANICS, TOLUENE, BENZIDINE 7/1/87 4A , 2B EQHOECHST CELANESE - BAY CITY 30134 FM 3057, BAY CITYORGANICS 12/20/95 0 , 2 E,Q,V,2* AMEROIL CORP112612 HWY 35, PALACIOSGASOLINE 8/4/97 1B , 1A E,QCHARLES TEUTSCH 102562 3121 7TH ST, BAY CITYGASOLINE 9/10/91 2 , 2A E,QCITY OF BAY CITY 100730 1217 AVE J, BAY CITYGASOLINE 5/29/91 2 , 2A E,QCLAYTON LEE SR 111688 100 MAIN ST, PALACIOSGASOLINE 8/21/96 2 , 2A E,QCLEAN CLOSURE INVESTMENTS, INC 096917 1602 7TH ST, BAY CITYGASOLINE 9/19/90 2 , 6 E,Q* DIAMOND MINI MART112756 2120 7TH ST, BAY CITYUNKNOWN 11/4/97 2 , 2A E,QTNRCC - 126

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236MATAGORDAPSTMAVERICKPCD/CAPSTMCCULLOCHPSTMCLENNANENF/WSTPCD/CADIEBEL OIL COMPANY 106567 N HWY 35, PALACIOSGASOLINE 4/26/93 2 , 6 E,Q* EDCO ENVIRONMENTAL SYSTEMS INC111890 2041 AVE F, BAY CITYGASOLINE 10/31/96 2 , 2A E,QEDCO INC 096454 AVE B, BLESSINGGASOLINE 7/25/90 2 , 2A E,QEDCO INC 098984 2217 7TH ST, BAY CITYGASOLINE 5/1/91 2 , 6 E,QEDCO INC 103963 N HWY 60, BAY CITYDIESEL 1/6/92 2 , 2A E,Q* EVANS SYSTEMS INC111346 1705 MATTHEWS, BAY CITYGASOLINE 7/8/96 2 , 2A E,Q* FLINTEX OIL CO111833 7TH, BAY CITYGASOLINE, WASTE OIL 10/17/96 2 , 2A E,QFLINTEX OIL COMPANY 107999 3001 AVE F, BAY CITYGASOLINE 3/24/94 2 , 2A E,Q* HURLEY BUTANE CO108024 E HWY 35, BAY CITYGASOLINE, DIESEL 4/6/94 2 , 2A E,QJONES BACKHOE SERVICE 097649 BUCKS BAYOU RD, BAY CITYGASOLINE 12/15/90 2 , 3 E,QMATAGORDA COUNTY DRAINAGE D #1 103124 3520 NICHOLS ST, BAY CITYGASOLINE, DIESEL 12/17/91 2 , 2A E,QMELTON MALONE 110748 FM 1728, PLEDGERUNKNOWN 4/1/96 2 , 2A E,Q YPALACIOS ISD 095585 1304 NEWSON BLVD, PALACIOSGASOLINE, ALCOH FUEL 5/4/90 2A , 6 E,QSEALAND PRODUCTS CO INC 105862 1401 1ST ST, PALACIOSWASTE OIL 7/15/91 2 , 2A E,Q* STONE DON102774 1817 AVE F, BAY CITYUNKNOWN 3/31/92 2 , 2A E,Q* W A THOMPSON112264 3333 E 7TH ST, BAY CITYGASOLINE 4/18/97 2 , 2A E,Q* CITY OF EAGLE PASSNA INTERNATIONAL BRIDGE, EAGLE PASSNITRATE 6/15/95 0A , 4A EDIAMOND SHAMROCK REF & MKTG CO 099870 1200 MAIN ST, EAGLE PASSGASOLINE 8/8/91 2 , 2A E,QE Z SERVE PETROLEUM MARKETING 111684 3164 N HWY 277, EAGLE PASSGASOLINE 9/11/96 2 , 5 E,QFERNANDO MARTINEZ 096976 602 MAIN ST, EAGLE PASSGASOLINE 10/16/90 2 , 2A E,QGROSSENBACHER J F 091869 HWY 277, QUEMADOGASOLINE 4/15/88 5B , 4 E,QRAY VILLAREAL 091143 HWY 227, QUEMADOGASOLINE 10/27/86 5B , 1A E,QTRAVELERS INSURANCE COMPANY 102943 FM 1665, NORMANDYDIESEL 4/28/92 2 , 2A E,QTXDOT 098733 S HWY 277, EAGLE PASSGASOLINE 4/24/91 2 , 6 E,Q* UNKNOWN112310 MAIN, MAVERICKUNKNOWN 5/29/97 1B , 1A E,QCIRCLE K CORP 109563 1800 S BRIDGE, BRADYGASOLINE 5/14/95 2 , 2A E,QCITY OF BRADY 092844 HWY 377, BRADYJET FUEL 4/13/89 2 , 6 E,QDODDS ANN 103161 N HWY 87, BRADYGASOLINE 5/13/92 2A , 1A E,QEPPS GARY/HOLLOWAY RONNIE 103156 210 N BRIDGE, BRADYGASOLINE 5/11/92 1B , 1A E,QMOORE OIL CO-STANLEY MOORE INC 103163 800 S BRIDGE, BRADYGASOLINE 3/4/92 2 , 2A E,Q* STANLEY MOORE INC109977 1914 S BRIDGE, BRADYWASTE OIL 10/14/95 2A , 1A E,Q* WIGGINTON OIL109747 1307 N BRIDGE, BRADYWASTE OIL 7/19/95 2 , 2A E,QWIGGINTON OIL 109748 1900 S BRIDGE, BRADYWASTE OIL 7/19/95 2 , 2A E,QPRECISE HARD CHROME (TEXAS HYDRAULICS) 38542 6613 NORTH 19TH STREET, WACOCHROMIUM 12/18/91 3B , 3 EIDEAL COMPANY, INC. 31873 2400 MARY, WACOPENTACHLOROPHENOL,HYDROCARBONS, NAPTHANAVAL WEAPONS INDUSTRIAL RESERVE PLANTHWY 84, MCGREGOR- MCGREGOR3/29/88 2B , 6 EQV2330056 ORGANICS, PESTICIDES 3/1/93 3A , 2A E,QTNRCC - 127

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236MCLENNANPCD/SUPPCD/VCPSTPRECISE HARD CHROME COMPANY 38542 6613 NORTH 19TH STREET, WACO, TXHEXAVALENT CHROMIUM 1/3/92 2C , 2A,4 E,Q,V,2,3* 19.58 ACRE TRACT, BLOCKER ADDITION573 UNIVERSITY PARKS DR. AND LASALLE AVENUE, METALS 7/22/97 0 , 2 EWACO* FORMER RAINBOW BAKING PLANT PROPERTY 581 215 SOUTH 23RD STREET, WACOHYDROCARBONS 7/31/97 0 , 2 E* IDEAL WOOD515 2400 MARY STREET, WACOHYDROCARBONS, WOODPRESERVATIVE4/23/97 0 , 3 EPACKLESS METAL HOSE, INC. 341 8401 IMPERIAL DRIVE, WACOMETALS 9/9/96 0 , 2A E* PRECISION NATIONAL PLATING SERVICES, INC. 505 333 SOUTH VALLEY MILLS DRIVE, WACOMETALS 4/15/97 1 , 2 EAMERICAN BANK OF WACO 102399 3218 BELLMEAD DR, WACOGASOLINE 3/26/92 2 , 2A E,QAWAY MARKETING INC 093315 318 HEWITT DR, HEWITTGASOLINE 7/6/89 2A , 2A E,Q* BARSH CONSTRUCTION CO112056 304 DOUGLAS ST, WOODWAYGASOLINE, DIESEL 7/17/96 1B , 1A E,Q* BURGESS MARKETING097029 600 N VALLEY MILLS, WACOGASOLINE 8/15/90 2 , 2A E,QBURGESS MARKETING 097031 4716 BOSQUE BLVD, WACOGASOLINE 8/15/90 2 , 2A E,QBURGESS MARKETING 097032 300 LASALLE, WACOGASOLINE 8/15/90 2 , 2A E,QBURGESS MARKETING 097035 2004 BELLMEAD DR, WACOGASOLINE 8/15/90 5B , 1A E,QCENTEX AG SUPPLY 108994 HWY 317, CRAWFORDGASOLINE 1/4/95 2 , 2A E,Q* CITY OF HEWITT108735 140 S 2ND, HEWITTGASOLINE 9/13/94 2 , 2A E,QCITY OF WACO 096259 324 COLCORD, WACOGASOLINE, DIESEL 7/20/90 1B , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 099736 1724 S VALLEY MILLS, WACOGASOLINE 7/15/91 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099737 1601 S JACK KULTGEN FWY, WACOGASOLINE 7/15/91 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099743 2233 AIR BASE RD, LACY LAKEVIEWGASOLINE 7/15/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 099758 901 S 5TH ST, WACOGASOLINE 7/15/91 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099761 1800 S 5TH, WACOGASOLINE 7/15/91 2 , 6 E,QEXXON COMPANY USA 096115 4325 W WACO DR, WACOGASOLINE 3/30/90 2A , 6 E,QEXXON COMPANY USA 096121 5801 BOSQUE BLVD, WACOGASOLINE 3/30/90 2 , 6 E,QEXXON COMPANY USA 107047 1020 S 5TH ST, WACOGASOLINE 1/6/93 2A , 6 E,QFEDERAL LINEN & UNIFORM SVCS. 102276 1224 DUTTON ST, WACODIESEL 3/9/92 2A , 6 E,Q* G W DISTRIBUTING112302 103 ESTATES DR, WACOGASOLINE 5/1/97 2 , 4 E,QGIFFORD-HILL & CO. 098388 1200 E WEBSTER, WACOGASOLINE 3/26/91 2 , 2A E,Q* H E BUTT GROCERY CO099711 2501 S UNIVERSITY PARKS, WACODIESEL 7/29/91 2 , 2A E,QHACK BRANCH DISTRIBUTING CO 099212 320 S UNIVERSITY PARKS, WACOGASOLINE 6/5/91 2A , 1A E,QHALTOM OIL CO 110028 3612 BELLMEAD DR, BELLMEADGASOLINE 11/1/95 2 , 2A E,Q* HERBERT PEBSWORTH102661 2326 N 18TH, WACOGASOLINE 5/1/92 2 , 2A E,Q* JIM PARK111544 201 W OAK, WESTGASOLINE 8/28/96 2 , 2A E,QMCLENNAN COUNTY DEPT OF EDUCAT 094887 MAIN, RIESELGASOLINE 2/9/90 2 , 2A E,QMERCHANTS FAST MOTOR LINES 096076 324 S LACY DR, WACOGASOLINE, DIESEL 5/15/90 2 , 2A E,Q* NIX REALTY111364 511 S ROBINSON DR, ROBINSONGASOLINE 2/7/96 1B , 1A E,QSERVION INC (TRITON AIR HLDGS) 094135 7377 AIRPORT DR, WACOUNKNOWN 10/9/89 2 , 5 E,QSOUTHLAND CORP 092121 421 S 9TH ST, WACOGASOLINE 8/9/88 2 , 2A E,QSOUTHLAND CORP 092608 600 S 11TH ST, WACOGASOLINE 4/30/88 2A , 6 E,Q* STAR ENTERPRISE099552 1025 S 5TH ST, WACOGASOLINE 7/1/91 2 , 2A E,QTEXAS STATE TECHNICAL COLLEGE 100174 3801 CAMPUS DR, WACOGASOLINE, DIESEL 7/29/91 2 , 2A E,QUNION PACIFIC RAILROAD CO 094387 3700 KATY LN, BELLMEADDIESEL 1/23/90 2 , 2A E,QUNKNOWN 091560 1724 VALLEY MILLS, WACOGASOLINE 11/4/87 5B , 6 E,QUNKNOWN 091682 116 FRONT ST, MARTGASOLINE 1/25/88 2 , 2A E,QTNRCC - 128

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236MEDINAENF/WSTPCD/VCPSTMIDLANDENF/WSTPCD/CAPCD/ENFPCD/VCPSTGARY AEROSPACE 32159 HONDO AIRFIELD, HONDOCR, PB, CD, AS, VOCS,BTEX,CHLORINATED H5/3/85 5B , 4 EQV* HONDO, CITY OFT0017 1600 AVENUE M, HONDOPB, CR, AS, VOC'S, BTEX 5/3/85 5B , 4 EQVTEXAS OIL SALVAGE 40777 2 MI SE OF NATALIA IN MEDINA CITYVOLATILES 10/1/91 3B , 2A E* STRAIT FARM EQUIPMENT583 301 US HIGHWAY 90 EAST, HONDOHYDROCARBONS 8/6/97 1 , 2 E* CITY OF DEVINE112254 304 E PARK ST, DEVINEUNKNOWN 5/14/97 1B , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 108908 E HWY 90, HONDOGASOLINE 9/19/94 2 , 2A E,QE Z SERVE PETROLEUM MARKETING 111652 401 19TH ST, HONDOGASOLINE 8/30/96 2 , 2A E,QWINKLER PARTNERS 097820 2005 19TH ST, HONDOGASOLINE 12/29/90 2 , 2A E,Q3-B RATTLESNAKE (WICKETT) 36030 1ST & MONAHANS, WICKETTVOLATILES 5/19/94 3B , 0 EDOWELL SCHLUMBERGER - MIDLAND 33591 HWY 80, MIDLANDVOLATILE ORGANIC COMPOUNDS 12/29/89 3B , 4 EQRED SNAPPER REAMERS 39508 2700 WEST FRANCIS, MIDLANDDICHLOROETHANE,CHLOROFORM, CARBON TETRA3/1/91 2B , 2 EQKAY AND KOMPANY (GENERAL ELEC) 52086 704 S. JOHNSTON STREET, MIDLANDORGANICS, PCBS 12/20/93 1B , 0 E,Q,VCENTRILIFT-HUGHES SERVICES 67488 2065 MARKET ST., MIDLANDTPH,CHLORINATED SOLVENTS,BTEX2/12/91 2A , 4 EQV2PETROLITE CORPORATION-MIDLAND 30698 I 20 & FM 1788, MIDLANDORGANICS 12/19/86 2C , 3 EQV23 YTRI CITY BEVERAGES 52102 2101 MARKET ST., MIDLANDVOC'S,GASOLINE,TPH 3/5/90 2C , 4 EQVCITY OF MIDLAND RIGHT-OF-WAY 238 ADJACENT TO W. FLORIDA/S. JOHNSTON ST.,TRANSFORMER/CAPACITORMIDLANDFLUIDS, PCBS4/22/96 0 , 6 ECORNERSTONE SHOPPING CENTER 199 4400 NORTH MIDLAND DRIVE, MIDLANDCHLORINATED SOLVENTS 3/7/96 0 , 5 ERAINBOW TRADE CENTER 240 1503 WEST INDUSTRIAL AVENUE, MIDLANDTRANSFORMER/CAPACITOR 4/22/96 0 , 3 EFLUIDS, PCBS* SMITH INTERNATIONAL/DRILCO COMPLEX 433 3100 GARDEN CITY HIGHWAY, MIDLANDCHLORINATED SOLVENTS 1/11/97 0 , 2 ESMITH INTERNATIONAL/DRILCO392 3100 GARDEN CITY HIGHWAY, MIDLANDCHLORINATED SOLVENTS 11/6/96 0 , 2 ECOMPLEX/LANDFILLSOLAR INJECTION SYSTEMS 239 1501 WEST INDUSTRIAL AVENUE, MIDLANDTRANSFORMER/CAPACITORFLUIDS, PCBS4/22/96 0 , 2 ECHAPARRAL CARS INC 097667 6605 S HWY 349, MIDLANDGASOLINE 1/3/91 2 , 2A E,Q* CHAPARRAL SYSTEMS112340 2300 N BIG SPRING, MIDLANDUNKNOWN 5/28/97 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092994 4401 W WADLEY, MIDLANDGASOLINE 5/5/89 2 , 4 E,QCHEVRON USA INC 092351 TANK FARM, MIDLANDGASOLINE 12/1/88 2 , 4 E,QCITY OF MIDLAND 094819 500 N CARVER AVE, MIDLANDGASOLINE, DIESEL 2/5/90 2 , 2A E,QCITY OF MIDLAND 095049 600 N CARVER, MIDLANDWASTE OIL 1/29/90 2 , 2A E,Q* E E HENSLEY & SON112663 801 W IH 20, MIDLANDUNKNOWN 9/29/97 2A , 1A E,QE Z SERVE PETROLEUM MARKETING 104001 1308 N LAMESA RD, MIDLANDGASOLINE 7/29/92 2 , 2A E,QEDDINS WALCHER CO 108813 3015 GARDEN CITY HWY, MIDLANDDIESEL 9/30/94 2 , 2A E,QEXXON COMPANY USA 099053 702 W WALL ST, MIDLANDGASOLINE, WASTE OIL 4/9/91 2A , 6 E,QEXXON COMPANY USA 100828 661 E FRONT ST, MIDLANDGASOLINE 2/17/91 2 , 2A E,QTNRCC - 129

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236MIDLANDPSTMILAMPCD/CAPCD/SUPEXXON COMPANY USA 100878 3603 W WALL ST, MIDLANDGASOLINE 5/20/91 2 , 6 E,QHALLIBURTON SERVICES 095310 12924 W HWY 80, ODESSAGASOLINE 3/26/90 2A , 6 E,QHINKLE DISTRIBUTING CO 093342 2300 WADLEY, MIDLANDUNKNOWN 7/11/89 2 , 2A E,QHINKLE DISTRIBUTORS, INC 093525 10400 W IH-20, MIDLANDUNKNOWN 8/18/89 2 , 2A E,QHINKLE DISTRIBUTORS, INC 095055 3301 N MIDKIFF, MIDLANDGASOLINE 2/15/90 2A , 6 E,Q* HINKLE ENTERPRISES111925 3910 FM 1788, MIDLANDGASOLINE, DIESEL 10/22/96 2 , 2A E,QHORKEY OIL CO INC 104216 3614 W WALL, MIDLANDGASOLINE 8/10/92 2 , 2A E,QJOHNSON TED 096289 2200 W FRONT ST, MIDLANDGASOLINE 7/30/90 2 , 2A E,QKENT DISTRIBUTORS 091700 3310 W WALL, MIDLANDDIESEL 2/16/88 2 , 2A E,QKENT DISTRIBUTORS 091718 3314 W LOOP 250 N, MIDLANDGASOLINE 2/16/88 5B , 2A E,QLINDSEY JIM 105942 2301 W WADLEY, MIDLANDGASOLINE 1/16/93 2 , 2A E,QLORAINE PROPERTIES LW-SSP2 107363 500 N LORAINE, MIDLANDGASOLINE 11/22/93 2 , 6 E,QMCCLATCHY BROS INC 103526 3901 W INDUSTRIAL, MIDLANDGASOLINE, DIESEL 6/18/92 2 , 5 E,QMIDLAND 66 OIL CO INC 096251 1612 GARDEN CITY HWY, MIDLANDGASOLINE, WASTE OIL 7/24/90 2 , 6 E,Q* MIDLAND 66 OIL CO INC109421 2410 RANKIN HWY, MIDLANDGASOLINE 4/9/95 2 , 2A E,QMIDLAND COUNTY 097668 200 S HENDERSON BLVD, MIDLANDGASOLINE 1/3/91 2 , 2A E,QMIDSAN CO 099056 710 W SCHARBAUER DR, MIDLANDGASOLINE 5/14/91 2 , 2A E,QPERMIAN CORP(SCURLOCK PERMIAN) 098876 GARDEN CITY HWY, MIDLANDDIESEL 5/5/91 2 , 3 E,Q* RAY LINDSEY112137 607 S BIG SPRING ST, MIDLANDUNKNOWN 5/16/97 2 , 2A E,QRENAISSANCE PARK INC 100724 4340 W ILLINOIS AVE, MIDLANDUNKNOWN 8/8/91 2 , 3 E,QROGERS FORD SALES 098539 4200 W HWY 80, MIDLANDWASTE OIL 4/5/91 2 , 6 E,QSANCHEZ ESTATE 091272 IH-20, MIDLANDUNKNOWN 12/15/86 2 , 3 E,QSMITH MARVIN 097946 3307 ANDREWS HWY, MIDLANDGASOLINE, DIESEL 2/5/91 2 , 2A E,QSOUTHLAND CORP 097310 1112 S MIDLAND DR, MIDLANDGASOLINE 10/29/90 2 , 4 E,QSOUTHLAND CORP 100851 4415 N GARFIELD, MIDLANDGASOLINE 10/30/91 2 , 2A E,QSOUTHLAND CORP 105716 3301 W ILLINOIS, MIDLANDGASOLINE 12/15/92 2 , 2A E,QSOUTHLAND CORP 106915 900 S BIG SPRING, MIDLANDGASOLINE 7/6/93 2 , 2A E,QSOUTHLAND CORP 106916 4601 N AVE A, MIDLANDGASOLINE 7/9/93 2 , 3 E,QSOUTHLAND CORP 106962 4325 ANDREWS HWY, MIDLANDGASOLINE 7/13/93 2 , 2A E,QSOUTHLAND CORP 107577 2111 W WALL, MIDLANDGASOLINE 7/8/93 2 , 3 E,QSOUTHWEST ENERGY 109393 LOOP 250, MIDLANDDIESEL 4/12/95 2A , 1A E,Q YSOUTHWESTERN BELL TELEPHONE CO 096434 305 N MIDLAND DR, MIDLANDDIESEL 8/1/90 2 , 2A E,QTEXACO 098764 501 N BAIRD, MIDLANDGASOLINE 4/26/91 2 , 6 E,QTEXACO REFINING & MARKETING 091364 3301 ANDREWS HWY, MIDLANDGASOLINE 6/1/87 2 , 2A E,QTEXACO REFINING & MARKETING 091694 701 N BIG SPRINGS, MIDLANDGASOLINE 6/1/85 2 , 4 E,QTEXACO REFINING & MARKETING 097893 3300 N MIDKIFF, MIDLANDGASOLINE 1/25/91 2 , 2A E,QTEXACO REFINING & MARKETING 099664 2200 W WALL, MIDLANDGASOLINE, WASTE OIL 10/1/90 2 , 2A E,QTOWN & COUNTRY FOOD STORES 100181 3115 GARDEN CITY HWY, MIDLANDGASOLINE 9/12/91 2 , 2A E,QUNKNOWN 091534 111 W OAK, MIDLANDGASOLINE 4/18/86 5B , 1A E,QUS POSTAL SERVICE 108252 100 E WALL ST, MIDLANDGASOLINE 6/3/94 2 , 6 E,QWALLED LAKE DOOR COMPANY T0234 INDUSTRIAL DRIVE, CAMERONVOC'S 2/22/93 0 , 1 E,Q,VCOFFIELD/MINERVA REFINERY 8 MILES NORTH OF ROCKDALE, TX. ON U.S. HWY 77 HYDROCARBONS 3C , 3 E,Q,V,1,2,3IN THE TOWN OF MINERVATNRCC - 130

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236MILAMPCD/VC* WALLED LAKE DOOR FACILITY463 1201 INDUSTRIAL BOULEVARD, CAMERONHYDROCARBONS, CHLORINATEDSOLVENTS2/14/97 0 , 5 EPSTMITCHELLENF/WSTPCD/ENFPCD/SUPPSTMONTAGUEPSTMONTGOMERYMSWPCD/CACIRCLE K CORP 101123 902 N TRAVIS, CAMERONGASOLINE 8/23/90 2 , 6 E,Q* FARMCO INC110305 607 TRAVIS, CAMERONGASOLINE 12/21/95 2A , 1A E,Q* THREADGILL OIL CO INC111884 200 E HWY 79, THORNDALEGASOLINE, DIESEL 8/12/96 2 , 2A E,QUNKNOWN 091486 600 N FANNIN, CAMERONGASOLINE 9/24/87 5B , 1A E,QDOWELL SCHLUMBERGER - COLORADO CITY 33589 ROUTE 3, COLORADO CITYBTEX,TPH,VOCS 11/1/89 3B , 3 EQV 1,2NATIONAL FOAM MFG. CO. 81720 E. HWY 80 COLORADO CITY, TXVOC, SVOC 6/10/96 0 , 1B EQV2COL-TEX STATE SUPERFUND SITE SH 377, COLORADO CITYPETROLEUM HYDROCARBONS 9/15/91 3B , 2 E,Q,V,1,2,3ADK INVESTMENTS, INC. 103337 IH--20, COLORADO CITYGASOLINE 5/21/92 2A , 1A E,QCITY OF COLORADO CITY 095242 1444 WESTPOINT, COLORADO CITYGASOLINE 4/18/90 2 , 6 E,QCITY OF COLORADO CITY 095244 HWY 163, COLORADO CITYGASOLINE 3/16/90 2 , 2A E,QCITY OF COLORADO CITY 095308 180 W 3RD ST, COLORADO CITYGASOLINE 3/20/90 2A , 2A E,QD & S CORNER STORE 098065 IH--20, WESTBROOKGASOLINE 2/13/91 2 , 2A E,QLORAINE ISD 095309 800 S LOOBY, LORAINEGASOLINE 3/21/90 2 , 2A E,QSKINNY'S INC. 111029 395 E 2ND, COLORADO CITYGASOLINE 5/19/96 2 , 3 E,QTU ELECTRIC 095550 HWY 1639, COLORADO CITYDIESEL 5/8/90 2 , 4 E,Q* ABELL OIL CO111934 HWY 59, BOWIEGASOLINE 11/6/96 1B , 1A E,Q* BOWIE ISD111862 412 LAMB, BOWIEGASOLINE 10/1/96 2 , 2A E,QBOWIE ISD SCHOOLS 097292 508 LAMB ST, BOWIEGASOLINE 11/19/90 2A , 1A E,QCOLLIER ESTATE 110358 W HWY 82, SAINT JOGASOLINE 1/24/96 2 , 2A E,Q* FFP OPERATING PARTNERS LP109780 W HWY 82, SAINT JOGASOLINE 7/24/95 2 , 2A E,Q* HERR OIL CO112109 203 E BROAD, SAINT JOGASOLINE 2/4/97 1B , 1A E,QJANICE DURHAM SMITH 106671 FM 677, SAINT JOGASOLINE 4/30/93 2 , 2A E,Q* SANDFORD OIL CO112397 801 PARK AVE, BOWIEGASOLINE, DIESEL 5/8/97 2 , 2A E,QTXDOT 101727 HWY 175, NOCONAGASOLINE, DIESEL 1/29/92 2 , 2A E,QTXDOT 108532 318 CLAY ST, NOCONAGASOLINE, DIESEL 8/16/94 2 , 6 E,QWHITE PAUL 100743 603 E WISE, BOWIEGASOLINE 10/11/91 5B , 1A E,QCITY OF CONROE: MW-9. MSW00081A LOOP 336, 2 MI. NE OF CONROE; 1.3 MI. FROM LOOP VOCs (1,1-DICHLOROETHANE,336 AND SH 105 INTERSECTION.TCE, AND BTEX COMPOUNDS.CITY OF WILLIS: MW-7 AND 8.MSW00706 &1901NE OF WILLIS, APPROX. 1 MI. NE OF CITY CENTER,ADJ. TO AND ON THE NW SIDE OF MT. ZION RD.,WILLIS, TX.7/5/93 2B , 6C E,Q,V,2TDS AND Cl. 6/26/89 2A , 2B E,Q,V,1,2EXXON CO USA - CONROE 23417 CRIGHTON ROAD, CONROEPCP, TPH, DIOXINS 5/24/90 2B , 4 ETNRCC - 131

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236MONTGOMERYPCD/SUPUNITED CREOSOTING COMPANY (OUT OFBUSINESS)HILBIG RD AND 2ND ST, CONROE UNITEDCREOSOTING WOOD PRESERVING SUPERFUNDSITEPENTACHLOROPHENOL,NAPTHALENE8/1/85 5A , 4 E,Q,V,2,3MOOREPSTWUDENF/WST* AFZAL GEHHWAL112173 22106 W HWY 105, MONTGOMERYUNKNOWN 3/12/97 2 , 2A E,Q* AMERCO REAL ESTATE CO112059 1305 S IH 45, CONROEUNKNOWN 1/15/97 1B , 1A E,Q* BARNETT AND PEEBLES110994 WASHINGTON, CLEVELANDUNKNOWN 5/16/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 094811 309 N FRAZIER, CONROEGASOLINE 2/20/90 2A , 6 E,QCHEVRON PRODUCTS COMPANY 098349 710 SAWDUST RD, THE WOODLANDSGASOLINE 3/22/91 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110434 HWY 59, NEW CANEYGASOLINE 1/26/96 2 , 2A E,QCIRCLE A SUPER STOP 094938 23077 FM 1314, PORTERGASOLINE 2/1/90 2 , 2A E,Q* COCA COLA BOTTLING CO107011 RT 23, CONROEGASOLINE, DIESEL 7/13/93 2 , 2A E,QDELBERT HEAD & ANNE ST. PIERRE 096871 214 E DAVIS, CONROEGASOLINE 9/29/90 5B , 1A E,QDIAMOND SHAMROCK 092174 HWY 149, MONTGOMERYGASOLINE 9/20/88 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091666 3010 W DAVIS, CONROEGASOLINE 2/16/88 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 092215 1101 W LOOP 336, CONROEUNKNOWN 9/12/88 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 094205 812 W DAVIS, CONROEGASOLINE 12/10/89 2 , 2A E,QEXXON COMPANY USA 091049 530 FM 1314, PORTERGASOLINE 10/16/85 2A , 6 E,QEXXON COMPANY USA 099813 26914 N IH-45, OAK RIDGEGASOLINE 6/27/91 2 , 6 E,QGEORGE MCCRAY 091928 201-B PINEWOOD, CONROEGASOLINE 6/8/88 2A , 1A E,QK P OIL CO 104055 1519 S IH--45, CONROEUNKNOWN 2/10/92 2A , 1A E,QK P OIL CO 104056 1519 S IH--45, CONROEUNKNOWN 2/10/92 2A , 1A E,Q* LAWRENCE LAVENDER112074 606 N LOOP 336 E, CONROEGASOLINE 1/8/97 2 , 2A E,Q* MAGNOLIA ISD112085 8040 KEN LAKE, MAGNOLIAGASOLINE 1/17/97 2 , 3 E,Q* MAYER ROY100045 115 LOOP 494, PORTERGASOLINE 8/28/91 2 , 2A E,QMOBIL OIL CORP 102446 1395 MANY PINES, THE WOODLANDSGASOLINE 12/9/91 2 , 6 E,Q* MONTGOMERY COUNTY105637 HWY 105, MONTGOMERYGASOLINE, DIESEL 12/18/92 1B , 1A E,QPEET MATINA 093533 3802 HWY 105, CONROEUNKNOWN 8/24/89 2 , 2A E,QPINEY WOODS MART 108725 2040 CALVARY RD, WILLISGASOLINE 10/14/94 2 , 2A E,QRESOLUTION TRUST CORP 105547 43 STEPHEN F AUSTIN DR, CONROEGASOLINE 12/14/92 2 , 2A E,QSPEEDWAY SUPER AMERICA LLC 092241 8901 S IH--45, CONROEGASOLINE, DIESEL 10/17/88 2 , 4 E,Q* STOP N SERV111005 FM 1314, PORTERGASOLINE 5/2/96 2 , 2A E,QSTOP N SERV 111006 FM 13143, PORTERGASOLINE 5/2/96 2 , 2A E,QSTUBBS PETROLEUM CO INC 109988 HWY 59, NEW CANEYUNKNOWN 6/26/95 2 , 2A E,QTENNECO OIL INC 092336 FM 1488, CONROEGASOLINE 9/16/88 2 , 3 E,Q* THE WOODLANDS FIRE DEPT111814 9951 GROGANS MILL RD, THE WOODLANDSGASOLINE, DIESEL 10/3/96 2 , 2A E,Q* VERNON HARRIS112395 26860 HWY 75, SPRINGGASOLINE, HYDR FLUID 5/13/97 1B , 1A E,QWALDEN ON LAKE CONROE 095269 12050 MELVILLE RD, MONTGOMERYGASOLINE 3/30/90 2 , 2A E,QWELLS FARGO 093143 615 W DAVIS ST, CONROEGASOLINE 6/9/89 2A , 6 E,Q* WHITENER ENTERPRISES INC112633 N HWY 59, SPLENDORAGASOLINE 9/9/97 1B , 1A E,QEXXON CONROE 1700181 WELL 1 (G1700181B) AND WELL 3 (G1700181C)- METHYL-T-BUTYL ETHER,EXXON CONROE GAS PLANT 6 MILES SE OFTOLUENECONROE3/18/93 2D , 3 E,Q,V,2DIAMOND SHAMROCK - MCKEE 30871 5 MI SOUTH OF TOWN, SUNRAYBENZENE 2/25/92 3B , 3 ETNRCC - 132

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236MOOREPSTMORRISENF/WSTPCD/ENFPSTMOTLEYPSTNACOGDOCHESPCD/ENFPSTFIRST STATE BANK OF DUMAS 096903 HWY 287, CACTUSGASOLINE, DIESEL 8/13/90 2 , 6 E,QJACK OLDHAM OIL CO INC 095193 423 S DUMAS AVE, DUMASGASOLINE 3/20/90 2 , 2A E,QJACK OLDHAM OIL INC 098618 1ST, DUMASGASOLINE 4/15/91 2 , 2A E,Q* LONE STAR STEEL30093 HWY 259 SOUTH, LONE STARMETALS 1/5/85 3B , 5 EQREILLY INDUSTRIES 30660 HWY. 259, LONE STARPHENOLS, CREOSOTE 3/1/89 2B , 3A ESOUTHWESTERN ELECTRIC POWER 31086 3 MILES EAST OF PITTSBURGTPH, BTEX 3/31/94 2B , 3 EQVHAWKINS NOEL 092592 CITY BLK 1, NAPLESGASOLINE 2/2/89 2A , 1A E,QNAPLES KWIK STOP, INC. 103318 HWY 67, NAPLESGASOLINE 10/21/91 2 , 2A E,QNIBLETT OIL CO 104964 104 N MAIN ST, OMAHAGASOLINE 10/13/92 2 , 2A E,Q* SCOT INDUSTRIES107838 HWY 250, LONE STARGASOLINE, HYDR FLUID 1/25/94 2 , 2A E,QDAVIS OIL COMPANY 098447 1201 BAILEY ST, MATADORDIESEL 3/27/91 2 , 2A E,QRONALD DAVIS CORPORATION 092723 FM 684, ROARING SPRINGSGASOLINE 3/13/89 2 , 2A E,QRED T COIL CO. (COLEMAN CO) 37143 5004 SOUTH ST., NACOGDOCHESCHLORINATED SOLVENTS,GASOLINE CONST.7/1/89 2C , 4 EQVCARL MONK 100267 309 MOUND ST, NACOGDOCHESGASOLINE, WASTE OIL 9/9/91 2A , 6 E,QCIRCLE K CORP 093455 1516 E MAIN, NACOGDOCHESGASOLINE 7/28/89 2 , 6 E,QCIRCLE K CORPORATION 092578 1504 NORTH ST, NACOGDOCHESGASOLINE 8/24/88 2 , 4 E,Q* COCA COLA BOTTLING CO104603 3321 NW STALLINGS, NACOGDOCHESGASOLINE, DIESEL 9/2/92 2 , 5 E,QDENNY OIL CO 092341 1501 NORTH ST, NACOGDOCHESGASOLINE 11/17/88 2 , 2A E,QDENNY OIL CO 102309 3101 SOUTH ST, NACOGDOCHESGASOLINE 3/18/92 2 , 2A E,QJERRY BAKER 092854 1629 SOUTH ST, NACOGDOCHESGASOLINE 4/10/89 2 , 2A E,QJERRY EVANS 095612 HWY 7, NACOGDOCHESGASOLINE 5/24/90 1B , 6 E,QLACEY & HOLLIS PETROLEUM INC 091499 SMITH ST, NACOGDOCHESGASOLINE 10/27/87 2 , 2A E,QM & M MINIT MARKET INC #2 103685 4512 N ST, NACOGDOCHESGASOLINE 6/26/92 1B , 1A E,QMOORE SUPPLY CO 104655 120 BREMOND, NACOGDOCHESGASOLINE 9/15/92 2 , 6 E,QMORGAN OIL CO 097703 314 E SPRADLEY ST, NACOGDOCHESGASOLINE, DIESEL 1/4/91 2 , 2A E,QMORGAN OIL CO 110095 1302 NORTH ST, NACOGDOCHESGASOLINE 10/11/95 2 , 3 E,QREED DISTRIBUTING CO INC 104936 409 BREMOND, NACOGDOCHESUNKNOWN 10/1/92 2A , 1A E,QRUBLE P.,RUBLE J.,YOUNG R.,EST 099260 1501 N DOUGLAS RD, NACOGDOCHESGASOLINE, DIESEL 6/13/91 2 , 2A E,QSOUTHLAND CORP 092577 1612 SOUTH ST, NACOGDOCHESGASOLINE 8/15/88 2 , 4 E,QSWBT COMPANY 102819 1700 SW STALLINGS DR, NACOGDOCHESGASOLINE 2/6/92 5B , 1A E,QTEXAS FARM PRODUCTS 104654 613 W MAIN, NACOGDOCHESGASOLINE 9/15/92 2A , 6 E,QTEXAS FARM PRODUCTS CO 103487 915 S FREDONIA, NACOGDOCHESGASOLINE, DIESEL, WASTE OIL 6/15/92 2 , 2A E,QTOTAL PETROLEUM INC 100335 3220 SOUTH ST, NACOGDOCHESGASOLINE 6/24/91 2 , 2A E,QTXDOT 095141 HWY 21, NACOGDOCHESGASOLINE 3/21/90 2 , 6 E,QTYSON FOODS 102160 2208 SE STALLINGS DR, NACOGDOCHESDIESEL 3/3/92 2A , 2A E,QTNRCC - 133

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236NAVARROPCD/ENFPSTNEWTONPSTNOLANPCD/ENFPSTCHEVRON U.S.A. INC. - DAWSON TERMINAL 31863 STATE HWY. 31-E ABOUT 1 MI NE OF DAWSON BTEX,TPH 3/30/87 3B , 4 EQ YAVENUE FUEL DISTRIBUTORS 092929 IH--45 & 15TH STREET, CORSICANAGASOLINE 5/3/89 2 , 2A E,QCIRCLE K CORP 092630 1139 W 7TH AVE, CORSICANAGASOLINE 5/11/88 2 , 4 E,QCITY OF CORSICANA 106607 NAVARRO RD, CORSICANAAV-GAS 5/19/93 2A , 6 E,Q* CONOCO INC112118 856 W 2ND AVE, CORSICANAUNKNOWN 2/18/97 2 , 2A E,QCORP OF ENGINEERS 094166 NAVARRO MILLS LAKE, NAVARRO MILLSGASOLINE 8/19/88 2 , 2A E,QCORSICANA NATIONAL BANK 092984 222 S 7TH ST, CORSICANAGASOLINE 4/7/89 2 , 2A E,QCORSICANA NATIONAL BANK 102616 HWY 31, KERENSGASOLINE 9/19/91 2 , 2A E,QCORSICANA NATIONAL BANK 102965 2901 W 7TH ST, CORSICANAGASOLINE 5/5/92 2 , 2A E,QDYESS BILL 092985 103 N 7TH, CORSICANAGASOLINE 4/6/89 5B , 2A E,QFDIC 097348 301 W COLLIN, CORSICANAGASOLINE 11/26/90 2 , 2A E,Q* GENE KELLY103801 S HWY 287, EUREKAGASOLINE, DIESEL 7/8/92 2 , 2A E,QGRAVES BILLY 103765 123 N 7TH, CORSICANAUNKNOWN 6/9/92 5B , 1A E,QHARMAN, NELLE S. & OTHERS 093217 521 S 7TH ST, CORSICANAUNKNOWN 6/1/89 2 , 4 E,QJACK THOMAS 096710 628 S 7TH ST, CORSICANAGASOLINE 9/13/90 2 , 2A E,QLEE HOLSEY SAND & GRAVEL 105574 2201 S HWY 75, CORSICANADIESEL 12/2/92 1B , 1A E,Q* NAVARRO TRUCK STOP, INC.110995 IH-45, RICEUNKNOWN 5/16/96 2 , 2A E,QPHILLIPS GROCERY 098901 2821 W 7TH AVE, CORSICANAGASOLINE 5/10/91 2 , 2A E,QRESOLUTION TRUST CORP 098344 1107 W SEVENTH AVE, CORSICANAGASOLINE 3/19/91 2A , 2A E,QREYNOLDS CHARLES 092986 104 N 7TH ST, CORSICANAGASOLINE 4/6/89 5B , 2A E,QRYDER TRUCK RENTAL INC 106315 1890 S HWY 75, CORSICANADIESEL, WASTE OIL 2/25/93 2A , 6 E,QSOUTHLAND CORP 091779 E HWY 31, CORSICANAGASOLINE 3/25/88 2 , 2A E,QTXDOT 097047 3513 W 7TH AVE, CORSICANAGASOLINE 10/4/90 2D , 6 E,QTXDOT 097048 3513 W 7TH AVE, CORSICANADIESEL 10/4/90 2 , 6 E,QWINTERS OIL CO 093097 300 S 7TH ST, CORSICANAUNKNOWN 3/17/89 5B , 1A E,QCIRCLE K CORP 109864 HWY 12, DEWEYVILLEGASOLINE, DIESEL 1/7/95 2 , 2A E,QE TEX OIL CO/ K-P OIL INC 091005 7 HWY 87, NEWTONGASOLINE 6/9/83 2A , 1A E,Q* HOLMES, THOMAS093861 HWY 190, NEWTONWASTE OIL 10/18/89 5B , 2A E,Q* NOLAN OIL CO INC112296 S HWY 87, CALLUNKNOWN 4/14/97 2 , 2A E,QGULF REFINERY (FORMERLY ENROD) 52139 W OF SH 70, S OF I-20, SWEETWATERBENZENE, XYLENE, TPH 6/30/88 2C , 2 EQV23BILL BURNS OIL CO 098713 W BRADFORD LN, SWEETWATERGASOLINE 3/26/91 2 , 2A E,QBILL BURNS OIL CO 109939 2001 LAMAR, SWEETWATERGASOLINE 9/29/95 2 , 2A E,QBILL BURNS OIL CO 111310 301 E BROADWAY, SWEETWATERGASOLINE 6/20/96 2 , 2A E,QBILL BURNS OIL CO 111313 14TH, SWEETWATERGASOLINE 6/20/96 2 , 2A E,QBILL BURNS OIL CO 111493 1306 ELM ST, SWEETWATERGASOLINE 8/5/96 2 , 2A E,QBILL BURNS OIL CO. 098714 301 W 1ST, SWEETWATERGASOLINE 3/25/91 2 , 2A E,QEXXON COMPANY USA 097650 IH-20, SWEETWATERGASOLINE, DIESEL 12/10/90 2 , 6 E,QMCCORMICK MARKETING 093537 E BROADWAY, SWEETWATERGASOLINE 8/18/89 2 , 2A E,Q* NATIONAL AUTO TRUCK STOPS109857 IH-20, SWEETWATERGASOLINE, DIESEL 8/10/95 2A , 1A E,QSKINNY'S INC 109940 1400 HAILEY, SWEETWATERGASOLINE 10/3/95 2 , 3 E,QSKINNY'S INC. 110097 1811 LAMAR, SWEETWATERGASOLINE 4/5/95 2 , 2A E,QTNRCC - 134

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236NOLANPSTNUECESENF/WSTIHWPCD/CAPCD/ENF* SKINNY'S INC.110098 2100 LAMAR, SWEETWATERGASOLINE 5/12/95 2 , 2A E,QSTANLEY MORRIS 099822 1509 LAMAR ST, SWEETWATERGASOLINE, DIESEL 8/9/91 2 , 2A E,QSTROMAN OIL COMPANY INC 091144 UNKNOWN, MARYNEALGASOLINE 6/18/86 5B , 1A E,QTXDOT 101510 IH--20, SWEETWATERGASOLINE, DIESEL 1/7/92 2 , 2A E,QWATTS SPEIGHT 094440 1209 HAILEY, SWEETWATERGASOLINE 12/11/89 5B , 2A E,QAMERADA HESS CORP. 39033 1802 POTH LANE, CORPUS CHRISTIHYDROCARBONS; BTEX 7/12/90 2B , 3 EAMERICAN CHROME & CHEMICALS 31661 3800 BUDDY LAWRENCE DR, CORPUS CHRISTI CHROME, HYDROCARBONS 1/1/80 3B , 4 ECITGO REFINING & CHEMICALS - C CHRISTI 32501 CANTWELL LANE, CORPUS CHRISTIHYDROCARBONS/NAPTHA 12/6/89 2D , 3 ECITGO REFINING & CHEMICALS - EAST 30532 1801 NUECES BAY BLVD., CORPUS CHRISTIHYDROCARBONS 10/1/81 2D , 3 ECITGO REFINING & CHEMICALS - WEST 33763 1801 NUECES BAY, CORPUS CHRISTITPH 10/25/93 1 , 0 EQV* COASTAL REFINING AND MARKETING INC 30530 1300 CANTWELL ROAD, CORPUS CHRISTIHYDROCARBONS 1/1/89 4A , 3 EQV2HALE DUSTING 32963 HWY 44 W OF ROBSTOWNARSENIC 3/20/85 3B , 2A EQHOECHST CELANESE CORPORATION-CORPUS 30483 SH 44 WEST OF CORPUS CHRISTICR, PB, AS, PHENOL, METHANOL 1/1/83 2B , 5 EQCHRI* INDUSTRIAL ROAD/ METALS31251 3000 AGNES ST, CORPUS CHRISTICHLORINATED BENZENECOMPOUNDS11/1/96 4A , 5 EQV2KOCH REFINING 30529 8787 UPRIVER RD,APPRX 6 M W-NW OF CORPUS FREE AND DISSOLVED PHASECHRISTIHYDROCARBONS10/1/81 3B , 3 EQVMUSTANG OIL AND TOOL COMPANY, INC. 80367 802 N. CLARKWOOD, CORPUS CHRISTICHROMIUM 10/24/91 2 , 1 ESOUTHWESTERN REFINING CO 30033 1700 NUECES BAY BLVD, CORPUS CHRISTIHYDROCARBONS 6/22/89 3B , 3 EQV23TEXAS ECOLOGISTS, INC. 39023 P.O. BOX 308, PETRONILA RD., ROBSTOWNBENZENE, C-DISULFIDE, CRESOL,CHL-BENZEN2/17/87 3 , 4 EQV23VALERO REFINING 30478 5900 UPRIVER ROAD, CORPUS CHRISTIPETROLEUM HYDROCARBONS 7/1/88 2D , 4 V3CHEMICAL WASTE MANAGEMENT INC. - CORPUSCHRISTI32325 6901 GREENWOOD RD, CORPUS CHRISTIPHENOL,CHLOROFORM,CARBONTETRACHLORIDE,TOLUENE,ETHYLBENZENE,TCE4/14/88 3A , 4,5 E,Q,V,2,3CITGO WEST PLANT - CC 33763 1801 NUECES BAY BLVD CORPUS CHRISTITPH, BENZENE, TOLUENE, LEAD 10/25/93 2A , 2A E,Q,VCOASTAL REFINING AND MARKETING 30530 1300 CANTWELL ROAD, CORPUSHYDROCARBONS 4/27/92 3B , 2A E,Q,V,2CHRISTI/TECHNICAL CENTERHOECHST CELANESE ENGINEERING, INC. 30084 ONE MILE SOUTHWEST OF BISHOPORGANICS, METALS 2/24/87 3A , 4,5 E,Q,V,2,3* TEXAS ECOLOGY39023 FM2826 AND PETRONILA RD,ORGANICS 12/1/87 3A , 3,4,5 E,Q,V,2CHEMICAL WASTE MANAGEMENT INC. - CORPUS 32325 6901 GREENWOOD RD, CORPUS CHRISTIPHENOL,CHLOROFORM,CARBON 4/14/88 3A , 6C E,Q,V,2,3CHRISTITETRACHLORIDE,TOLUENE,ETHYLBENZENE,TCECITGO WEST PLANT - C.C. 33763 1801 NUECES BAY BLVD, CORPUS CHRISTITPH, BENZENE, TOLUENE, LEAD 10/25/93 2A , 2 E,Q,VCITGO/CHAMPLIN PETROLEUM 30532 1801 NUECES BAY BLVD., CORPUS CHRISTIHYDROCARBONS 11/1/85 2C , 4 E,QHOECHST CELANESE - CORPUS CHRISTI 30483 SH 44 WEST OF CORPUS CHRISTI/TECHNICALCENTERORGANICS,METALS,TPH 1/1/83 2B , 5 E,Q,V,2,3HOECHST CELANESE ENGINEERING, INC. 30084 ONE MILE SOUTHWEST OF BISHOPORGANICS, METALS 2/24/87 3A , 5 E,Q,V,2,3KOCH REFINING 30529 SUNTIDE ROAD, CORPUS CHRISTIHYDROCARBONS-TOLUENE, 6/1/83 3A&D , 3456A EXYLENE, BA, VNNAVAL AIR STATION - CORPUS CHRISTI 30479 CORPUS CHRISTIHYDROCARBONS, METALS, PH 3/13/87 3A , 2A E,Q,V,2COASTAL STATES CRUDE - NUECES CO. 39988 1.5 MI E OF INT OF HWY 77 AND FM665, NUEHYDROCARBONS 10/23/89 2A , 2A EQHOECHST CELANESE CORPORATION-CORPUS 30483 SH 44 WEST OF CORPUS CHRISTI/TECHNICAL C CR, PB, AS, PHENOL, METHANOL 1/1/83 2B , 5 EQCHRITNRCC - 135

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236NUECESPCD/ENFPCD/SUPPCD/VCPSTPORT OF CORPUS CHRISTI AUTHORITY 39876 RINCON POINT N OF BURLESON RD, CORPUS CH BTEX,TPH 12/15/89 2B , 3 EQV1ROGERS DELINTED COTTON SEED SH 77, NORTH OF ROBSTOWNORGANIC ACIDS 5/6/87 1B , 1A QSOUTH TEXAS SOLVENTS STATE SUPERFUNDSITE32367 F.M. 666, 4 MILES SOUTH OF BANQUETE, TX.BENZINE, TOLUENE, XYLENE,OTHER SOLVENT CONSTITUENTS3C , 3 E,Q,V,1,2,3COMMERCIAL METALS COMPANY 222 4614 AGNES STREET, CORPUS CHRISTIMETALS AND PCBS 4/2/96 0 , 2 E* HELDENFELS/FORDYCE PROPERTY252 PORT OF CORPUS CHRISTI INDUS. DISTRICT,TPH 5/10/96 0 , 6 ECORPUS CHRISTI* HOLMAN BOILER WORKS244 3921 AGNES STREET, CORPUS CHRISTIBTEX 4/29/96 0 , 2 E* KEEPER'S LOCKER, INC.556 LAWRENCE STREET T-HEAD, CORPUS CHRISTI TPH, BTEX 6/27/97 0 , 2 E* MCBRIDE LANE TRUCK STOP494 INTERSTATE 37 AND MCBRIDE LANE, CORPUSCHRISTIPETROLEUM HYDROCARBONS 3/24/97 0 , 2 EA & W SPORTSMAN 106546 9705 S PADRE ISLAND DR, CORPUS CHRISTIUNKNOWN 4/24/93 5B , 1A E,Q* A L RANKIN108357 4440 PRESCOTT, CORPUS CHRISTIGASOLINE 4/13/94 2A , 1A E,QA&W PROPERTIES %BAYCOGIBSON 107377 9729 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 10/13/93 5B , 1A E,Q* AIR LIQUIDE AMERICA, INC.108618 301 HEREFORD ST, CORPUS CHRISTIGASOLINE 5/11/94 2 , 2A E,QALLWASTE ENVIRONMENTAL SERVICE 103343 1840 SUNTIDE RD, CORPUS CHRISTIDIESEL 4/15/92 2A , 6 E,QAMERICAN LINEN SUPPLY CO 094326 502 MCCAMPBELL RD, CORPUS CHRISTIGASOLINE 12/20/89 2 , 2A E,Q* ARGUINDEGUI OIL CO110985 300 N JOHNSON, ALICEUNKNOWN 5/16/96 2 , 2A E,Q* AUSTIN PITTMAN107194 4249 MCARDLE, CORPUS CHRISTIGASOLINE 8/11/93 2A , 1A E,Q* BENEFIELD FAMILY TRUST110413 5622 WEBER, CORPUS CHRISTIUNKNOWN 4/3/96 2 , 2A E,QBOOMERANG CORPORATION 095542 7402 UPRIVER RD, CORPUS CHRISTIGASOLINE 4/20/90 2 , 2A E,QBROOKE TRUST 111870 1602 AGNES ST, CORPUS CHRISTIGASOLINE, WASTE OIL 3/20/95 2 , 2A E,QBROWN DOYLE & PRISCILLA 104560 1340 S STAPLES, CORPUS CHRISTIGASOLINE 9/10/92 5B , 1A E,Q* BURNUP AND SIMS108904 1616 N PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 12/12/94 2 , 2A E,QCASTENADA FRANK 101139 2729 GOLLIHAR, CORPUS CHRISTIGASOLINE 12/3/91 5B , 1A E,QCELANESE ENGINEERING RESINS 099029 S HWY 77, BISHOPGASOLINE 5/20/91 2A , 6 E,QCENTRAL POWER & LIGHT 101958 2510 LIPAN ST, CORPUS CHRISTIUNKNOWN 10/17/92 2 , 2A E,Q* CENTRAL POWER & LIGHT106200 LOT 1-8 BLK 1, CORPUS CHRISTIGASOLINE 2/23/93 2 , 2A E,Q* CHANG YONG IM112462 4702 KOSTORYZ, CORPUS CHRISTIGASOLINE 6/30/97 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093430 1621 LEOPARD, CORPUS CHRISTIGASOLINE 7/1/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093431 4730 S ALAMEDA, CORPUS CHRISTIGASOLINE 7/1/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 094262 5601 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 1/2/90 2 , 4 E,QCHEVRON PRODUCTS COMPANY 099856 5940 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 8/13/91 2A , 6 E,Q* CHU KIM112463 514 OLD ROBSTOWN RD, CORPUS CHRISTIGASOLINE 6/30/97 2 , 2A E,QCITY OF CORPUS CHRISTI 091808 1024 SAM RANKIN ST, CORPUS CHRISTIDIESEL 4/14/88 2 , 2A E,QCITY OF CORPUS CHRISTI 107545 1901 N SHORELINE, CORPUS CHRISTIDIESEL 11/29/93 2 , 6 E,Q* CITY OF CORPUS CHRISTI109850 1550 HORNE RD, CORPUS CHRISTIDIESEL 9/6/95 2A , 1A E,Q* CITY OF CORPUS CHRISTI112203 5352 AYERS, CORPUS CHRISTIUNKNOWN 3/31/97 2A , 6 E,QCLARK REED 095025 2901 SURFSIDE, CORPUS CHRISTIGASOLINE 2/13/90 2A , 2A E,QCOASTAL BEND RENT A CAR INC 104602 PINSON DR, CORPUS CHRISTIGASOLINE 9/9/92 2 , 6 E,QCOASTAL MARKETS 109702 7510 MCARDLE, CORPUS CHRISTIGASOLINE 3/24/95 2A , 6 E,QCOASTAL MAVERICK 091960 15302 S PADRE ISLAND DR, CORPUS CHRISTI GASOLINE 6/21/88 2 , 4 E,QCOASTAL MAVERICK 093936 13947 S PADRE ISLAND DR, CORPUS CHRISTI GASOLINE 10/31/89 2 , 4 E,QCOASTAL MAVERICK 100552 4900 OLD BROWNSVILLE RD, CORPUS CHRISTI GASOLINE 10/14/91 2 , 2A E,QCOASTAL MAVERICK 101248 9360 LEOPARD ST, CORPUS CHRISTIGASOLINE 12/13/91 2 , 3 E,QTNRCC - 136

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236NUECESPST* COASTAL MAVERICK105474 6001 S STAPLES, CORPUS CHRISTIWASTE OIL 12/4/92 2 , 4 E,QCOASTAL MAVERICK 109545 N HWY 77 BYPASS, BISHOPGASOLINE 3/26/95 2 , 2A E,QCOASTAL MAVERICK 109546 6802 EVERHART, CORPUS CHRISTIGASOLINE 3/24/95 2A , 1A E,QCOASTAL MAVERICK 109547 4222 KOSTORYZ, CORPUS CHRISTIGASOLINE 3/23/95 2A , 1A E,QCOASTAL MAVERICK 109548 5641 CARROLL LN, CORPUS CHRISTIGASOLINE 3/23/95 2A , 1A E,Q* COASTAL MAVERICK109553 5536 SARATOGA, CORPUS CHRISTIGASOLINE 3/22/95 2 , 2A E,QCOASTAL MAVERICK 109554 2034 AIRLINE, CORPUS CHRISTIGASOLINE 3/22/95 2A , 6 E,QCOASTAL MAVERICK 109555 6410 WEBER RD, CORPUS CHRISTIGASOLINE 3/25/95 2A , 1A E,QCOASTAL MAVERICK 109556 HWY 77, DRISCOLLGASOLINE 3/26/95 2A , 1A E,QCOASTAL TRANSPORT CO INC 095318 821 CORN PRODUCTS RD, CORPUS CHRISTIGASOLINE 1/2/90 2 , 2A E,QCOCA COLA BOTTLING CO 098604 1519 LEOPARD, CORPUS CHRISTIGASOLINE, DIESEL 4/9/91 2 , 2A E,QCONOCO, INC. 095097 3757 S STAPLES, CORPUS CHRISTIGASOLINE 3/6/90 2 , 6 E,Q* CORPUS CHRISTI EQUIPMENT CO IN098908 410 WESTCHESTER, CORPUS CHRISTIGASOLINE 5/1/91 2 , 2A E,QCORPUS CHRISTI ISD 099774 2525 BELTON ST, CORPUS CHRISTIDIESEL 7/30/91 2 , 2A E,Q* CORPUS CHRISTI ISD104292 1210 AGNES ST, CORPUS CHRISTIGASOLINE 8/7/92 2 , 2A E,QCORPUS CHRISTI ISD 106937 2902 OSO DR, CORPUS CHRISTIWASTE OIL 6/29/93 2 , 2A E,QCPH INVESTMENTS 097914 HWY 77, ROBSTOWNDIESEL 1/23/91 2A , 3 E,QDANVIR CORP 092827 8201 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 4/5/89 1B , 1A E,QDENTON PETROLEUM 102397 HWY 77, DRISCOLLGASOLINE, DIESEL 3/24/92 2 , 2A E,Q* DIAMOND SHAMROCK111451 4102 GREENWOOD, CORPUS CHRISTIUNKNOWN 7/16/96 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091198 713 AIRLINE, CORPUS CHRISTIGASOLINE 12/22/86 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 094049 6330 MCARDLE, CORPUS CHRISTIGASOLINE 10/30/89 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 094559 3401 LEOPARD, CORPUS CHRISTIGASOLINE 1/3/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 094654 2700 TEXACO RD, CORPUS CHRISTIGASOLINE 12/27/89 2A , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO095706 201 E AVE A, ROBSTOWNGASOLINE 6/1/90 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 099574 HWY 77, DRISCOLLGASOLINE 7/19/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 101291 HWY 44, AGUA DULCEGASOLINE 12/16/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 102193 1806 N SAM RANKIN, CORPUS CHRISTIGASOLINE 3/9/92 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 102833 5656 EVERHART, CORPUS CHRISTIGASOLINE 4/28/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 102994 3925 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE, WASTE OIL 5/6/92 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO110247 4101 GOLLIHAR RD, CORPUS CHRISTIGASOLINE 12/21/95 2 , 2A E,QDIX SHIPPING COMPANY 094541 1149 HARBOR DR, CORPUS CHRISTIGASOLINE 1/16/90 2 , 6 E,QE Z SERVE CONVENIENCE STORES 111676 4045 AYERS, CORPUS CHRISTIGASOLINE, DIESEL 9/9/96 2 , 2A E,QE Z SERVE MANAGEMENT CO 093511 102 W MAIN, BISHOPGASOLINE 7/14/89 2 , 2A E,QED MASSMAN 111952 850 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 11/21/96 2 , 2A E,QESTATE T A HARRELL JR 103575 8005 UP RIVER RD, CORPUS CHRISTIGASOLINE, DIESEL 3/20/92 2 , 6 E,QEXXON COMPANY USA 091529 3955 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 11/13/87 2 , 4 E,QEXXON COMPANY USA 091884 4101 AYERS, CORPUS CHRISTIGASOLINE 1/28/86 2 , 2A E,QEXXON COMPANY USA 092864 5746 EVERHART ST, CORPUS CHRISTIGASOLINE 12/17/84 2A , 6 E,QEXXON COMPANY USA 096600 1541 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 8/27/90 2 , 6 E,Q* EXXON COMPANY USA097078 1233 17TH ST, CORPUS CHRISTIGASOLINE 10/11/90 2 , 4 E,QEXXON COMPANY USA 104146 2314 AYERS ST, CORPUS CHRISTIGASOLINE 7/15/92 2 , 2A E,Q* EXXON COMPANY USA111259 5602 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 9/11/97 2 , 2A E,Q* EXXON COMPANY USA111279 4754 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE, WASTE OIL 6/26/96 1B , 1A E,QFDL AUTO CLINIC 100520 3812 BALDWIN, CORPUS CHRISTIGASOLINE 10/15/91 5B , 1A E,QFFP OPERATING PARTNERS 100455 S HWY 77, DRISCOLLDIESEL 10/3/91 2 , 2A E,QFOERSTER, LEROY 098824 585 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 4/23/91 2 , 2A E,QFONDREN PROPERTIES 110862 4233 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 3/19/96 2 , 6 E,QTNRCC - 137

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236NUECESPSTFUEL MANAGEMENT 104117 950 1/2 E PORT, CORPUS CHRISTIGASOLINE 8/3/92 2 , 2A E,QGENERAL SERVICE ADMINISTRATION 109368 6300 OCEAN DR, CORPUS CHRISTIUNKNOWN 4/4/95 1B , 1A E,QGEORGIA PACIFIC CORP 102708 230 OMAHA DR, CORPUS CHRISTIGASOLINE 4/14/92 2A , 6 E,QGRAND LODGE SONS OF HERMANN 102074 6704 RANGER, CORPUS CHRISTIGASOLINE 2/27/92 2A , 6 E,QGUNDERLAND MARINE 101681 1221 CANTWELL, CORPUS CHRISTIGASOLINE 1/22/92 2 , 2A E,QH E BUTT GROCERY CO 105833 102 MCBRIDE LN, CORPUS CHRISTIUNKNOWN 12/30/92 2 , 6 E,Q* HAAS PAVING CO110110 1401 HOLLY RD, CORPUS CHRISTIGASOLINE 11/22/95 2 , 2A E,QHALL OIL CO 098363 10010 S PADRE ISLAND DR, CORPUS CHRISTI GASOLINE 3/25/91 2 , 2A E,QHARRISON W O 104910 LAWRENCE ST, CORPUS CHRISTIUNKNOWN 10/9/92 2 , 2A E,QHELDENFELS BROTHERS INC 101684 521 MCBRIDE LN, CORPUS CHRISTIGASOLINE 2/10/92 2 , 2A E,Q* HUNT MCBRIDE PROPERTIES106846 349 MCBRIDE, CORPUS CHRISTIUNKNOWN 6/10/93 2 , 2A E,QINDUSTRIAL STAINLESS & ALLOYS 097840 211 MCBRIDE LN, CORPUS CHRISTIGASOLINE 1/23/91 2A , 6 E,Q* INTERNATIONAL BANK COMMERCE104729 510 CHANCELLOR ROW, CORPUS CHRISTIGASOLINE 9/18/92 2 , 2A E,QJENKINS BETTY 093580 9320 UP RIVER RD, CORPUS CHRISTIGASOLINE 8/10/89 2A , 1A E,Q* JOHNSTON N R ELECTRIC INC102730 4717 WESTWAY, CORPUS CHRISTIGASOLINE 4/22/92 2 , 2A E,QKING ISLES INC 109598 1402 HOLLY RD, CORPUS CHRISTIGASOLINE 5/26/95 2 , 2A E,QKINGSVILLE LAUNDRY & CLEANERS 095545 1111 NW BLUCHER ST, CORPUS CHRISTIGASOLINE 5/1/90 2 , 2A E,QKMART CORP 108628 4717 S PADRE ISLAND DR, CORPUS CHRISTIHYDR FLUID 4/14/94 2 , 2A E,QLAMBERT TRUSTS 096247 1421 N CHAPARRAL ST, CORPUS CHRISTIGASOLINE 5/2/90 2A , 6 E,QLOIS HALL PROPERTY 097129 BROWNLEE, CORPUS CHRISTIGASOLINE, DIESEL 10/25/90 2 , 5 E,QLSI SERVICES CO 091509 5634 WEBER RD, CORPUS CHRISTIGASOLINE 9/4/87 2 , 2A E,Q* M V JONES112107 3030 MARTIN LUTHER KING BLVD, CORPUS CHRISTI GASOLINE 1/30/97 1B , 1A E,QMALEK INC 096999 2521 ANTELOPE, CORPUS CHRISTIGASOLINE 10/19/90 2 , 2A E,Q* MANUEL LOPEZ108541 432 W MAIN ST, ROBSTOWNGASOLINE 7/14/94 2A , 1A E,Q* MARIA LUISA GARZA110268 4245 COLUMBIA, CORPUS CHRISTIGASOLINE 1/12/96 2 , 2A E,QMARSHALL SCHUYLER BIII 098524 2641 BALDWIN BLVD, CORPUS CHRISTIGASOLINE 4/5/91 2 , 4 E,Q* MARY SPISAK MOSES IND TRUSTEE110111 3501 S STAPLES, CORPUS CHRISTIGASOLINE 11/27/95 2 , 2A E,QMCCOY CORP 095561 5909 HOLLY RD, CORPUS CHRISTIGASOLINE 4/17/90 2 , 2A E,QNATIONAL CAR RENTAL OF CC INC 099585 335 PINSON, CORPUS CHRISTIGASOLINE 7/19/91 2 , 6 E,QNUECES COUNTY ROAD DEPT 094647 5655 BUSH RD, CORPUS CHRISTIGASOLINE 12/18/89 2 , 2A E,QOCEAN CORAL, L. C. 108470 6902 MCARDLE, CORPUS CHRISTIGASOLINE 6/22/94 2A , 1A E,QOIL PATCH TEXACO 110752 HWY 77, BISHOPUNKNOWN 4/1/96 2 , 2A E,QOK MEATS 103365 2341 PEARSE, CORPUS CHRISTIGASOLINE 6/4/92 2 , 2A E,QOMNIFLIGHT OFFSHORE 096133 13636 SMITH DR, CORPUS CHRISTIUNKNOWN 7/10/90 2 , 2A E,QPAUL'S TEXACO 096553 4742 KOSTORYZ, CORPUS CHRISTIGASOLINE 8/23/90 2 , 2A E,QPETROLEUM WHOLESALE INC 092024 2100 HORNE RD, CORPUS CHRISTIGASOLINE 7/7/88 2A , 1A E,Q* PRONTO DISTRIBUTING095752 4237 KOSTORYZ, CORPUS CHRISTIGASOLINE 6/11/90 2 , 2A E,QPRONTO DISTRIBUTING 101212 2701 S PORT, CORPUS CHRISTIGASOLINE 12/11/91 2 , 2A E,QPRONTO DISTRIBUTING, INC. 093208 2002 S STAPLES, CORPUS CHRISTIGASOLINE 6/21/89 2 , 4 E,QRAY WEST WAREHOUSES INC 100940 4801 BALDWIN BLVD, CORPUS CHRISTIGASOLINE 11/5/91 2 , 2A E,Q* RED CARPET CAR WASH INC100029 2740 S STAPLES, CORPUS CHRISTIGASOLINE 8/28/91 2 , 2A E,QRESOLUTION TRUST CORP 108091 4200 S ALAMEDA, CORPUS CHRISTIGASOLINE 9/15/93 2 , 2A E,QROBERT SALDANA 100646 HWY 77, DRISCOLLGASOLINE 10/21/91 2 , 3 E,Q* ROSE HILL PARK CEMETARY110244 2731 COMANCHE, CORPUS CHRISTIGASOLINE 2/20/93 2 , 3 E,Q* RYDER TRUCK RENTAL INC110930 4705 AGNES ST, CORPUS CHRISTIUNKNOWN 5/6/96 2 , 2A E,QS & B FINANCIAL 098907 MCBRIDE LN, CORPUS CHRISTIGASOLINE 5/6/91 2 , 2A E,QSCOTT ELECTRIC CO 098672 1919 N PORT AVE, CORPUS CHRISTIGASOLINE 4/17/91 2 , 2A E,QSEARS, ROEBUCK, & COMPANY 091807 4515 AGNES, CORPUS CHRISTIGASOLINE 4/14/88 2 , 2A E,QTNRCC - 138

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236NUECESPSTSEASIDE MEMORIAL CEMETERY 097076 255 ROBERT, CORPUS CHRISTIGASOLINE 10/24/90 2 , 2A E,QSECHRIST HALL CO 096360 102 OMAHA DR, CORPUS CHRISTIGASOLINE 6/11/90 2 , 2A E,Q* SOUTHWESTERN BELL TELEPHONE110345 6901 YORKTOWN, CORPUS CHRISTIGASOLINE 1/22/96 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 093938 4605 SOUTHWOOD ST, CORPUS CHRISTIGASOLINE 10/18/89 2 , 2A E,QSPOHN HOSPITAL 105976 600 ELIZABETH, CORPUS CHRISTIDIESEL 1/26/93 2A , 1A E,QSPORTS & REHABLITATION INC 104559 1502 S STAPLES, CORPUS CHRISTIGASOLINE 3/26/92 5B , 1A E,QSSP PARTNERS 092388 4425 KOSTORYZ, CORPUS CHRISTIGASOLINE 11/18/88 2A , 6 E,QSSP PARTNERS 092390 15733 S PADRE ISLAND DR, CORPUS CHRISTI GASOLINE 11/18/88 2 , 2A E,QSSP PARTNERS 092391 3802 STAPLES, CORPUS CHRISTIGASOLINE 11/18/88 2A , 6 E,QSSP PARTNERS 092393 701 ALISTER, PORT ARANSASGASOLINE 11/18/88 2 , 2A E,QSSP PARTNERS 092394 601 PORT, CORPUS CHRISTIGASOLINE 11/18/88 2 , 4 E,QSSP PARTNERS 094543 5555 UP RIVER RD, CORPUS CHRISTIGASOLINE 1/8/90 2 , 4 E,QSSP PARTNERS 094564 5007 EVERHART, CORPUS CHRISTIGASOLINE 12/12/89 2 , 2A E,QSSP PARTNERS 096119 4502 AYERS, CORPUS CHRISTIGASOLINE 7/6/90 2 , 6 E,QSSP PARTNERS 097405 1802 BALDWIN ST, CORPUS CHRISTIGASOLINE 12/3/90 2 , 4 E,QSSP PARTNERS 100881 3601 S STAPLES, CORPUS CHRISTIGASOLINE 10/29/91 2 , 2A E,QSSP PARTNERS 101491 701 N STAPLES, CORPUS CHRISTIGASOLINE 11/29/91 2A , 6 E,QSSP PARTNERS 101492 4515 WEBER RD, CORPUS CHRISTIGASOLINE 11/15/91 2 , 2A E,QSSP PARTNERS 101495 3102 AYERS RD, CORPUS CHRISTIGASOLINE 11/20/91 2 , 2A E,QSSP PARTNERS 101505 1601 AGNES ST, CORPUS CHRISTIGASOLINE 10/25/91 2 , 2A E,QSSP PARTNERS 101506 3302 BALDWIN BLVD, CORPUS CHRISTIGASOLINE 10/23/91 2 , 6 E,QSSP PARTNERS 101535 3042 S PORT AVE, CORPUS CHRISTIGASOLINE 11/29/91 2 , 5 E,QSSP PARTNERS 101539 5701 EVERHART RD, CORPUS CHRISTIGASOLINE 11/29/91 2 , 2A E,Q* SSP PARTNERS103975 4102 BALDWIN AVE, CORPUS CHRISTIGASOLINE 7/20/92 2 , 2A E,QSSP PARTNERS 106274 5995 WILLIAMS, CORPUS CHRISTIGASOLINE 11/1/92 2 , 2A E,QSSP PARTNERS 110125 219 N ALISTER, PORT ARANSASGASOLINE, DIESEL 11/29/95 2 , 2A E,QSSP PARTNERS 110147 628 HWY 44, ROBSTOWNGASOLINE 12/8/95 2A , 1A E,Q* SSP PARTNERS110149 2714 S STAPLES, CORPUS CHRISTIGASOLINE 12/8/96 2 , 2A E,Q* SSP PARTNERS110150 1050 NUECES BAY BLVD, CORPUS CHRISTIGASOLINE 12/8/95 2 , 2A E,QSSP PARTNERS 110151 11901 LEOPARD ST, CORPUS CHRISTIGASOLINE 12/12/95 2 , 2A E,QSSP PARTNERS 110341 1926 HORNE RD, CORPUS CHRISTIGASOLINE 1/23/96 2 , 2A E,QSSP PARTNERS 110342 4502 EVELYN, CORPUS CHRISTIGASOLINE 1/23/96 2 , 2A E,QSSP PARTNERS 110343 4214 CARROLL LN, CORPUS CHRISTIGASOLINE 1/23/96 2 , 2A E,QSSP PARTNERS 110380 5301 S STAPLES, CORPUS CHRISTIGASOLINE 1/30/96 2 , 2A E,Q* SSP PARTNERS110464 4101 HORNE RD, CORPUS CHRISTIUNKNOWN 1/15/96 2 , 2A E,Q* SSP PARTNERS110469 2202 WALDRON, CORPUS CHRISTIUNKNOWN 3/6/96 1B , 1A E,QSSP PARTNERS 110509 10801 LEOPARD, CORPUS CHRISTIUNKNOWN 3/8/96 2 , 2A E,Q* SSP PARTNERS110632 1303 3RD ST, CORPUS CHRISTIUNKNOWN 3/20/96 1B , 1A E,QSSP PARTNERS 111034 240 NAS DR, CORPUS CHRISTIUNKNOWN 5/22/96 2 , 6 E,QSSP PARTNERS 111035 3058 LAGUNA SHORES RD, CORPUS CHRISTIGASOLINE 12/8/95 2 , 6 E,QSUNBURST ENERGIES INC 091941 9702 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 6/8/88 2 , 4 E,Q* SYLVIA DEAN ESTATE108101 5501 LEOPARD LN, CORPUS CHRISTIGASOLINE 4/14/94 2 , 2A E,Q* TACO BELL112311 4501 AYERS, CORPUS CHRISTIGASOLINE 3/13/97 2 , 2A E,QTEXACO REFINING & MARKETING 092401 2201 GOLLIHAR, CORPUS CHRISTIGASOLINE 12/1/88 2 , 2A E,Q* TEXAS DEPT OF PUBLIC SAFETY096163 1922 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE 7/6/90 2 , 2A E,QTEXAS INDUSTRIES INC 105265 5330 AGNES, CORPUS CHRISTIGASOLINE, DIESEL 11/2/92 2A , 6 E,QTEXAS PARKS & WILDLIFE DEPT 099133 PARK RD 53, PORT ARANSASGASOLINE 5/28/91 2 , 6 E,QTEXAS STAR INVESTMENTS 100775 5758 GREENWOOD, CORPUS CHRISTIGASOLINE 10/22/91 2A , 1A E,QTNRCC - 139

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236NUECESPSTWQDOCHILTREEPCD/SUPPSTORANGEENF/WSTPCD/CAPCD/ENFPCD/SUPPCD/VCPSTTEXAS STAR INVESTMENTS 111821 1902 BALDWIN, CORPUS CHRISTIGASOLINE, DIESEL 10/22/96 2 , 2A E,QTEXAS STAR INVESTMENTS 111822 105 N PORT, CORPUS CHRISTIGASOLINE, DIESEL, OTHER 10/10/96 2 , 2A E,QTEXAS STAR OIL CO 093438 10361 S PADRE ISLAND DR, CORPUS CHRISTI GASOLINE 8/1/89 2 , 2A E,QTEXAS STAR OIL CO 099471 2730 AGNES, CORPUS CHRISTIGASOLINE 7/3/91 2 , 2A E,QTOM PYLE 109829 2801 S PADRE ISLAND DR, CORPUS CHRISTIGASOLINE, DIESEL 8/2/95 2A , 1A E,QTXDOT 100907 PORT, CORPUS CHRISTIGASOLINE, DIESEL 11/13/91 2 , 2A E,QUS NAVY CORPUS CHRISIT N A S 095272 BLDG 216A, CORPUS CHRISTICHEMICAL 3/7/90 2 , 2A E,QUS NAVY CORPUS CHRISTI N A S 091734 FUEL FARM 216, CORPUS CHRISTIUNKNOWN 3/15/88 2 , 3 E,QUS NAVY CORPUS CHRISTI N A S 096711 TANK SITE 290, CORPUS CHRISTIDIESEL 9/17/90 2 , 2A E,QUS NAVY CORPUS CHRISTI N A S 101358 BLDG 1153A, CORPUS CHRISTIGASOLINE 12/31/91 2 , 2A E,QUS NAVY CORPUS CHRISTI N A S 101682 TANK SITE H100-0, CORPUS CHRISTIKEROSENE 1/21/92 2 , 4 E,QUS NAVY CORPUS CHRISTI N A S 105847 BLDG 1263, CORPUS CHRISTIGASOLINE 12/10/92 2 , 2A E,QVAN DUSEN AIRPORT SERVICES CO 092829 506 INTERNATIONAL DR, CORPUS CHRISTIGASOLINE 11/11/88 2 , 5 E,QVAN DUSEN AIRPORT SERVICES CO 097480 506 INTERNATIONAL DR, CORPUS CHRISTIJET FUEL 11/17/90 2A , 1A E,QWALLY'S CENTER TIRE & GARAGE 097117 1501 S STAPLES ST, CORPUS CHRISTIGASOLINE 10/24/90 5B , 1A E,QWESTERN STEEL 109885 105 VILLA DR, CORPUS CHRISTIDIESEL 9/12/95 2 , 2A E,QWHATABURGER INC 094717 2349 PEARSE ST, CORPUS CHRISTIGASOLINE 12/27/89 2 , 2A E,Q* WILLIAM OLIVER JR108094 902 POWER ST, CORPUS CHRISTIGASOLINE 4/20/94 2 , 2A E,QCENTRAL POWER & LIGHT WQ01490 BARNEY M. DAVIS POWER STATION, 4301 WALDRON CHLORIDE, TDS 12/9/92 1B , 2 E,QDR., CORPUS CHRISTICITY OF PERRYTON MUNICIPAL WELL #2, PERRYTONCARBON TETRACHLORIDE 11/12/90 1A , 1B Q* TXDOT097740 HWY 15, PERRYTONGASOLINE 12/13/90 2 , 2A E,QFIRESTONE - ORANGE 30581 FM ROAD 1006, ORANGEGASOLINE,METALS (CR,CU,HG,P 1/1/85 3B , 2A EQV123NORTH STAR STEEL TEXAS 31237 OLD HWY 90, ROSE CITYCADMIUM, CHROMIUM, LEAD 7/25/94 2 , 1 EDUPONT - SABINE RIVER WORKS, BEAUMONT 30019 DU PONT DRIVE, ORANGECHLOROBENZENE 8/1/87 2B , 5 E,Q,V,2STAR ENTERPRISE - PORT ARTHUR 35851 401 W. 19TH STREET, PORT ARTHURBTEX TPH 7/7/92 0 , 5 E,Q,VSALVAGE MASTERS 83789 204 E MYERS2A , 0TRIANGLE CHEMICAL-ORPHAN SUPERFUND SITETRIANGLE CHEMICAL CO.- SOUTH OF ORANGE CO.AIRPORT ON SH 87, BRIDGE CITYORGAN CHEM, INDUSCOMPOUNDS11/22/87 5B , 5 E,Q,V,2,3* CBW TRANSPORT SERVICE, INC.516 INTERSECTION FM 105 AND FM 1442, BRIDGE CITY HYDROCARBONS 4/28/97 0 , 6 ECAMPBELL GAS & OIL CO 104670 8628 N HWY 87, ORANGEGASOLINE 9/10/92 2 , 2A E,QCAMPBELL TAYLOR OIL CO 091278 1025 TEXAS AVE, BRIDGE CITYGASOLINE 2/16/87 2 , 2A E,QCHEVRON PRODUCTS COMPANY 095268 155 IH-10, VIDORGASOLINE 11/1/89 2 , 4 E,QTNRCC - 140

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ORANGEPSTPALO PINTOPCD/ENFPSTCHEVRON PRODUCTS COMPANY 099725 2490 TEXAS AVE, BRIDGE CITYWASTE OIL 7/23/91 2 , 2A E,QCIRCLE K STORES 110865 1280 N MAIN, VIDORUNKNOWN 4/23/96 2 , 2A E,QCRAFT OIL CO 100241 1001 PARK AVE, ORANGEGASOLINE 9/3/91 2 , 2A E,QCRAFT OIL CO 102162 HWY 62, ORANGEGASOLINE, DIESEL 8/8/91 2 , 6 E,QCRAFT OIL CO 103251 HWY 62, ORANGEGASOLINE, WASTE OIL 4/13/92 2 , 2A E,Q* CRAFT OIL CO106836 1402 16TH ST, ORANGEGASOLINE 4/19/93 2 , 2A E,QCYPRESS BAYOU, INC. 092629 1610 W PARK ST, ORANGEGASOLINE 5/5/88 2 , 4 E,Q* DAIGLE L M OIL COMPANY INC100817 TEXAS AVE, BRIDGE CITYGASOLINE 1/2/91 2 , 2A E,Q* DARBY GAS & OIL CO110384 1115 N MAIN, VIDORGASOLINE 12/12/95 2 , 2A E,Q* DATAI ENTERPRISE INC112640 1107 CORDERY, ORANGEUNKNOWN 9/23/97 1B , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 091437 1010 N MAIN, VIDORGASOLINE 8/21/87 2 , 5 E,QDUPONT DE NEMOURS E I 093083 FM 1006, ORANGEDIESEL 5/15/89 2A , 6 E,Q* E Z MART STORES INC110416 712 DUPONT DR, ORANGEGASOLINE 2/23/95 2 , 2A E,Q* E Z MART STORES INC110417 1940 SIMMONS, ORANGEGASOLINE 10/24/94 2 , 2A E,QEXXON COMPANY USA 092196 1415 N 6TH ST, ORANGEGASOLINE 7/5/88 2 , 4 E,QEXXON COMPANY USA 098366 690 N MAIN, VIDORGASOLINE 9/11/90 2 , 2A E,QEXXON COMPANY USA 103406 IH-10, ORANGEUNKNOWN 12/13/91 2 , 6 E,QFINA OIL & CHEMICAL CO 104156 601 DUPONT DR, ORANGEGASOLINE 6/17/92 2 , 2A E,QMAPCO INC 092692 2205 HWY 62, ORANGEGASOLINE, DIESEL 10/3/88 2 , 2A E,Q* MARTIN MATTHEWS112630 2210 S MAIN, VIDORUNKNOWN 9/19/97 1B , 1A E,QMELVIN COOK 095658 FM 1130, ORANGEGASOLINE 5/22/90 2A , 2A E,QMOBIL OIL CORP 092492 115 IH--10, VIDORGASOLINE 11/9/88 2 , 2A E,QMOTT ALLEN SR 095722 1923 WESTERN AVE, ORANGEGASOLINE 3/23/90 5B , 2A E,QSHEZAD HUSSAIN ASGHER 091726 1519 37TH ST, ORANGEGASOLINE 1/29/88 2A , 2A E,QTEXAS COMMERCE BANK, N.A. 095664 635 W RAILROAD, VIDORGASOLINE, DIESEL 4/30/90 2 , 6 E,QTRI CON, INC. 099330 1743 TEXAS AVE, BRIDGE CITYGASOLINE, WASTE OIL 5/14/91 2 , 2A E,QPHILIPS COMPONENTS (MEPCO) 30930 AIRPORT ROAD, MINERAL WELLSSOLVENT CONSTITUENTS 1/1/85 2B , 4 EQV123 Y* 97 CIRCLE S CONVENIENCE STORES112427 101 SE 25TH ST, MINERAL WELLSGASOLINE 6/17/97 2 , 2A E,Q* BARB MANAGMENT INC107490 IH--20, GORDONGASOLINE 12/2/93 2 , 2A E,Q* CATHOLIC DIOCESE OF FORT WORTH112823 108 NW 4TH AVE, MINERAL WELLSUNKNOWN 12/18/97 2 , 6 E,Q* CITY OF MINERAL WELLS112193 AIRPORT RD, MINERAL WELLSUNKNOWN 3/20/97 2 , 6 E,QILLINOIS TOOL WORKS INC 106098 201 GARRETT MORRIS PKWY, MINERAL WELLS OTHER 2/9/93 2 , 6 E,Q* J A CARDWELL PROPERTIES112244 FM 4, SANTOUNKNOWN 4/10/97 1B , 1A E,Q* MARK KAHN112539 IH 20, GORDONDIESEL 7/31/97 1B , 1A E,QPETROLEUM WHOLESALE INC 091101 604 SE FIRST ST, MINERAL WELLSGASOLINE 8/1/86 2A , 2A E,Q* S & D OIL112432 6103 E HWY 180, MINERAL WELLSUNKNOWN 6/30/97 1B , 1A E,Q* SANDFORD OIL COMPANY, INC.112503 902 N OAK, MINERAL WELLSGASOLINE, DIESEL 7/21/97 2 , 2A E,Q* SANFORD OIL CO INC112485 3805 E HUBBARD, MINERAL WELLSGASOLINE 6/18/97 1B , 1A E,Q* SOUTHERN UNION GAS CO111180 217 W HUBBARD ST, MINERAL WELLSGASOLINE 6/5/96 2 , 2A E,QSTURDIVAN DUNAWAY OIL CO 091359 HWY 281, PEADENVILLEGASOLINE 6/4/87 2 , 2A E,QTOM SIMENTON 104345 3703 E HUBBARD, MINERAL WELLSGASOLINE 8/13/92 2 , 6 E,Q* TRIPLE A OIL CO112776 HOUSTON, STRAWNGASOLINE 5/21/97 2A , 1A E,Q* TRIPLE A OIL CO INC098412 HWY 206, GORDONGASOLINE 3/27/91 2 , 2A E,QTRIPLE A OIL CO INC 107157 502 SE 1ST ST, MINERAL WELLSUNKNOWN 7/28/93 2 , 5 E,QTNRCC - 141

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236PALO PINTOPSTPANOLAPSTPARKERFODPCD/ENFPCD/VCPST* TRIPLE A OIL CO INC107207 1103 E HUBBARD, MINERAL WELLSGASOLINE, DIESEL 9/1/93 2 , 2A E,QTRIPLE A OIL CO INC 107451 2102 E HUBBARD, MINERAL WELLSGASOLINE 7/30/93 2 , 2A E,QUNKNOWN 096570 E HWY 180, MINERAL WELLSUNKNOWN 8/26/90 2A , 1A E,QUS ARMY ENGINEER DISTRICT 109667 AIRPORT RD, MINERAL WELLSWASTE OIL, OTHER 2/17/94 2 , 2A E,QBESSERE CORP 109328 902 W PANDA, CARTHAGEGASOLINE 3/21/95 2 , 2A E,QFFP OPERATING PARTNERS 092781 1107 W SABINE, CARTHAGEGASOLINE 3/30/89 2 , 2A E,QKIRKLAND OIL COMPANY 099243 HWY 149, BECKVILLEGASOLINE 6/7/91 2 , 2A E,QMORGAN OIL CO 098357 FM 999, GARYGASOLINE 3/20/91 2 , 6 E,QMORTON JACK T 099705 701 N ST MARY ST, CARTHAGEGASOLINE 7/31/91 5B , 2A E,QNUTT OIL CO 105782 S LOOP 59, CARTHAGEGASOLINE 1/7/93 2 , 2A E,Q* PANOLA COUNTY108566 N HWY 79, CARTHAGEGASOLINE 6/13/94 2 , 2A E,QPANOLA NATIONAL BANK 097337 HWY 79, CARTHAGEGASOLINE 11/26/90 2 , 2A E,Q* SUE PARISH103411 309 S SHELBY ST, CARTHAGEGASOLINE 6/5/92 2 , 2A E,QTXDOT 095500 HWY 79, CARTHAGEGASOLINE 5/11/90 2 , 6 E,QUNKNOWN 091476 1/2 CLAYTON, CLAYTONUNKNOWN 8/6/87 5B , 2A E,QWHITAKER FRED 100103 226 N ST MARY ST, CARTHAGEWASTE OIL 8/30/91 2 , 2A E,Q* WILLIAMS ESTATE107136 E FM 999, GARYGASOLINE 8/11/93 2 , 2A E,QYOUNGBLOOD OIL CO 099921 710 E SABINE ST, CARTHAGEGASOLINE 8/13/91 2 , 2A E,Q* YOUNGBLOOD OIL CO110880 FM 1971, LONG BRANCHUNKNOWN 4/29/96 2 , 2A E,QCHEVRON PIPELINE CO.3711,3629,3818,TIN TO PRD AND 215 & 239MONTGOMERY LANE WEATHERFORD TX. 76087WEATHERFORD (CHEMICAL DYNAMICS) 30117 610 WEST 3RD ST.NI, AS, MG, AL 3/26/91 0 , 2AF EQWEATHERFORD (CHEMICAL DYNAMICS) 33990 1020 E. COLUMBIA, WEATHERFORDNI, ZN 6/20/90 0 , 1A EQWEATHERFORD - EAST COLUMBIA STREET 33590 1020 EAST COLUMBIA STREET, WEATHERFORD NI, ZN 1/23/98 0 , 1A EQ Y* FORMER LEVEL'S FOOD STORE500 SOUTH MAIN AND EAST LEE STREET,TPH, BTEX 4/8/97 0 , 6C EWEATHERFORD* 97 CIRCLE S CONVENIENCE STORES112365 2034 FORT WORTH HWY, WEATHERFORDGASOLINE 5/12/97 2 , 2A E,Q* 97 CRICLE S CONVENIENCE STORES112364 2020 S MAIN, WEATHERFORDGASOLINE 5/12/97 2 , 2A E,Q* ALEDO ISD098099 412 S FM 1187, ALEDODIESEL 7/27/91 2 , 2A E,QCHEVRON PIPELINE CO 099196 FM 1189, WEATHERFORDGASOLINE 6/6/91 2 , 2A E,QEXXON COMPANY USA 093253 3601 FORT WORTH HWY, WEATHERFORDUNKNOWN 5/4/89 2 , 6 E,Q* HARRIS BOB OIL COMPANY095880 3004 AZLE HWY, WEATHERFORDGASOLINE 3/15/90 2 , 2A E,QINEZ BENNETT 096059 HWY 1187, ALEDOGASOLINE 6/27/90 5B , 6 E,QINGRAM ENTERPRISES 093271 HWY 199, SPRINGTOWNDIESEL 6/8/89 2 , 6 E,Q* MOUGHON OIL CO INC112220 410 S MAIN, WEATHERFORDGASOLINE 7/21/97 5B , 1A E,QMOUGHON OIL COMPANY 092778 1001 N MAIN ST, WEATHERFORDGASOLINE 2/16/89 5B , 2A E,QNORTHSIDE BAPTIST CHURCH 096170 900 N MAIN ST, WEATHERFORDGASOLINE 6/1/90 5B , 6 E,QPETROLEUM WHOLESALE INC 099152 14001 IH--20, ALEDODIESEL 3/18/91 1B , 1A E,Q* ROADSIDE STATIONS INC106747 FM 55, SPRINGTOWNGASOLINE 6/3/93 2 , 2A E,Q* SANDFORD OIL CO INC112426 1401 S MAIN, WEATHERFORDGASOLINE, DIESEL 6/19/97 2 , 2A E,QTNRCC - 1422 , 6E,Q,V,2,3

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236PARKERPSTPARMERPCD/CAPECOSPOLKPSTPSTENF/WSTIHWPCD/CAPSTPOTTERENF/WSTFODIHWSOUTHLAND CORP 110839 901 MAIN, WEATHERFORDGASOLINE 4/15/96 2 , 2A E,Q* TRIPLE C ENERGY CO112202 102 E IH 20, WEATHERFORDGASOLINE 3/26/97 1B , 1A E,Q* TRIPLE C ENERGY CO112651 133 W WATER ST, WEATHERFORDKEROSENE 5/20/97 1B , 1A E,QTXDOT 101703 HWY 199, SPRINGTOWNGASOLINE 11/22/91 2 , 6 E,QUNKNOWN 104855 708 PALO PINTO DR, WEATHERFORDGASOLINE 9/17/92 2A , 6 E,QWAYNE CARTER OIL CO 108882 1126 FORT WORTH ST, WEATHERFORDGASOLINE, WASTE OIL 11/29/94 2 , 2A E,QCHEMICAL ENTERPRISES (W. R. GRACE) 34599 806 AREK, BOVINAPESTICIDES 8/3/89 0 , 5 ECHARLES OIL & GAS INC 099991 502 GARDNER, BOVINAGASOLINE 8/20/91 2 , 6 E,QFRANK LIGON OIL CO 095050 310 W DICKINSON, FORT STOCKTONGASOLINE 2/5/90 2 , 2A E,QFRANK LIGON OIL CO 095578 805 N ROONEY, FORT STOCKTONWASTE OIL 5/17/90 2 , 2A E,QJAMES E COLES ESTATE OF 097817 101 W 6TH ST, IRAANGASOLINE, DIESEL 1/24/91 5B , 2A E,Q* NEWELL OIL CO107527 102 E DICKINSON, FORT STOCKTONGASOLINE 10/25/93 2 , 2A E,QPECOS COUNTY 095247 PECOS CTY AIRPORT, FORT STOCKTONGASOLINE 3/12/90 2 , 6 E,Q* SOUTHWEST MARKETERS112816 405 RAILROAD AVE, FORT STOCKTONGASOLINE 12/1/97 1B , 1A E,QTHOMPSON OIL CO 099367 418 W DICKINSON, FORT STOCKTONGASOLINE 6/27/91 1B , 6 E,QWEST TEXAS GAS INC 098228 N HWY 349, SHEFFIELDGASOLINE 2/22/91 2 , 2A E,QWEST TEXAS GAS INC 103705 302 E DICKENSON, FORT STOCKTONGASOLINE 4/4/92 2 , 2A E,QWALKER WOOD 34399 HWY 1465,4 MI S OF LIVINGSTONCREOSOTE 9/11/89 3 , 5 EWALKER WOOD PRESERVING 34399 HIGHWAY 1465, 4 MILES S. OF LIVINGSTONCREOSOTE 10/13/86 3A , 4,5 EWALKER WOOD PRESERVING 34399 HIGHWAY 1465, 4 MILES S. OF LIVINGSTONCREOSOTE 10/13/86 3 , 6A E* POLK OIL CO INC093980 HWY 59, GOODRICHDIESEL 10/29/89 2A , 1A E,Q* VIOLA JONES112421 RT 1, LIVINGSTONUNKNOWN 6/20/97 2 , 2A E,QVIVIAN ORR 111678 HWY 190, LIVINGSTONGASOLINE 7/10/96 5B , 2A E,Q* WILLIAM WATSON112228 W HWY 190, LIVINGSTONUNKNOWN 4/4/97 1B , 1A E,QTEXACO AMARILLO 30005 315 S. GRAND, AMARILLOHYDROCARBONS 12/17/86 3A , 2B EQBURLINGTON NORTHERN RR INTERSECTION OF BURLINGTON AND BUCHANNAN DIESEL , 6STREETS AMARILLO, TXTEXACO REFG & MKTG INC. - AMARILLO 30005 315 S. GRAND, AMARILLOHYDROCARBONS 12/17/86 3A , 4,5 E,QTNRCC - 143

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236POTTERPCD/CAPSTWQDPRESIDIOPSTRAINSPSTRANDALLMSWTEXACO REFG & MKTG INC. - AMARILLO 30005 315 S. GRAND, AMARILLOHYDROCARBONS 12/17/86 3A , 5 E,QWAYNE CHEMICAL CORP 61027 9510 WAREHOUSE RD, AMARILLOCHROMIUM 1/1/88 1B , 4 EAMARILLO COUNTRY CLUB 098343 4800 BUSHLAND BLVD, AMARILLOGASOLINE 3/21/91 2 , 2A E,QBANK ONE 094015 7TH, AMARILLOGASOLINE 10/26/89 2A , 6 E,QBILL INNES 102202 10500 E IH-40, AMARILLOGASOLINE 2/21/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 102786 7301 W IH--40, AMARILLOGASOLINE 3/1/92 2 , 2A E,QCITY OF AMARILLO 093607 800 E 23RD, AMARILLOGASOLINE 6/26/89 2 , 2A E,QCITY OF AMARILLO 097024 609 S PIERCE, AMARILLOGASOLINE 10/9/90 2 , 2A E,QCONTINENTAL PANHANDLE LINES 100137 700 S TYLER, AMARILLODIESEL 9/12/91 2 , 2A E,QDEPAUW CONSTRUCTION CO 092559 2700 W ST FRANCIS, AMARILLOGASOLINE 1/24/89 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 093721 6212 RIVER RD, AMARILLOGASOLINE 9/18/89 2A , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 094211 4201 WESTERN, AMARILLOGASOLINE 9/1/89 2 , 6 E,Q* DIAMOND SHAMROCK REF & MKTG CO110137 2601 PARAMOUNT BLVD, AMARILLOGASOLINE 12/5/95 2 , 2A E,QE Z MART STORES INC 102977 2015 S WESTERN, AMARILLOGASOLINE 4/28/92 2 , 2A E,QFDIC C/O NATIONAL STONEHENGE 095016 8010 BELL, AMARILLOGASOLINE 3/12/90 2 , 4 E,QFLYING J CORP 092220 9601 AIRPORT, AMARILLOGASOLINE 7/22/88 2 , 3 E,QJ LEE MILLIGAN INC 108424 9200 TRIANGLE DR, AMARILLOGASOLINE 7/15/94 2 , 2A E,QKATHARIN OBRIEN 101931 3501 E AMARILLO BLVD, AMARILLOGASOLINE, DIESEL 2/10/92 2A , 1A E,Q* KERR MCGEE REFINING CORP094099 300 AMARILLO, AMARILLOGASOLINE 11/3/89 2 , 2A E,Q* LOVES COUNTRY STORES112536 6930 E IH 40, AMARILLOUNKNOWN 8/15/97 1B , 1A E,QMACKS SUPER MARKET 095344 5631 AMARILLO, AMARILLOGASOLINE 4/9/90 2 , 2A E,Q* PRO AM III TRUCK STOP112575 IH 40, AMARILLOGASOLINE, DIESEL 8/19/97 1B , 1A E,Q* SCOTT, GLENNA095341 4308 CANYON DR, AMARILLOGASOLINE 3/27/90 2 , 2A E,Q* SOUTHWESTERN PORTLAND CEMENT099604 BUSHLAND MILL, BUSHLANDDIESEL 6/18/91 2 , 2A E,QST ANTHONYS HOSPITAL 104844 200 NW 7TH ST, AMARILLODIESEL 10/27/92 2 , 2A E,QSTEERE TANK LINES 094269 2401 N MIRROR, AMARILLOGASOLINE 10/12/89 1B , 1A E,QTASCOSA COUNTRY CLUB 098937 2400 N WESTERN, AMARILLOGASOLINE 5/9/91 2 , 2A E,QTEXACO REFINING & MARKETING 093600 5815 BELL ST, AMARILLOGASOLINE 6/26/89 2 , 2A E,Q* TOOT N TOTUM FOOD STORES INC101928 301 S ROSS, AMARILLOGASOLINE 2/20/92 2 , 2A E,Q* TOOT' N TOTUM FOOD STORES, INC098301 1500 S WASHINGTON, AMARILLOGASOLINE 3/4/91 2 , 2A E,QTOOT'N TOTUM FOOD STORES, INC. 100194 3601 W 45TH ST, AMARILLOGASOLINE 9/16/91 2 , 2A E,QWESTERN MARKETING 109946 1215 S GRAND ST, AMARILLOGASOLINE 6/14/95 2A , 6 E,QSOUTHWESTERN PUBLIC SERVICE CO. WQ01990 1.25 MILES WEST OF STATE HWY 136 AND 6 MILES NITRATE, CHLORIDE, SULFATE 1/1/78 3C,2C , 4,5 E,QNORTHEAST OF AMARILLO, TX.TXDOT 099012 W FM 170, PRESIDIOGASOLINE, DIESEL 3/7/91 2 , 2A E,Q* GTE108382 HWY 69, POINTGASOLINE, DIESEL 7/11/94 2 , 2A E,QBFI/SOUTHWEST: MW-10 AND 12 MSW01663A 1 MI. N OF CANYON CITY LIMITS, 1.2 MI. SW OF INT. VOCS (METHYLENE CHLORIDE) 2/1/96 2B , 3 E,Q,V,2OF FM2590 AND BUFFALOE STADIUM RDTNRCC - 144

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236RANDALLPSTWQDWUDREAGANPCD/CAREALPSTPSTRED RIVERPSTREEVESFODPSTAIR SPEED OIL CO 102201 CITY HALL BLDG AREA, LAKE TANGLEWOODGASOLINE 3/11/92 2 , 2A E,QANNIE WEAVER 095334 2113 2ND, CANYONGASOLINE 4/9/90 5B , 2A E,QCITY OF CANYON 103056 1509 3RD ST, CANYONGASOLINE 5/13/92 2 , 2A E,QCONSUMERS FUEL INC OF CANYON 097192 W 1ST, CANYONGASOLINE 10/26/90 5B , 1A E,QEXXON COMPANY USA 093874 311 23RD ST, CANYONGASOLINE 10/11/89 2 , 4 E,QLAGRONE H ODELL 095015 2300 4TH AVE, CANYONGASOLINE 7/21/89 5B , 1A E,QMCKEE DALE 102257 2800 4TH AVE, CANYONGASOLINE 3/19/92 2 , 6 E,QHIGH PLAINS UWCD NO. 1 SAMPLING PROGRAM 1109806 WELL NO. 11-09-806 (SAMPLE 381-2-4)ATRAZINE 7/17/89 1D,1B , 1B E,Q,V,2COUNTRY ESTATES MOBILE HOME PARK 1910005 WELL 4 (G1910005C) - S. WELL ON E. SIDE OF TETRACHLOROETHENE 4/8/91 2C , 5 E,Q,V,2TRAILER PARK, AND WELL 5 (G1910005D) - N. WELLON E. SIDE OF TRAILER PARKWESTERN MOBILE HOME PARK 1910010 (G1910010A) - O.1 MI. W. OF WESTEN AVE. AND O.2 TETRACHLOROETHENE 12/4/91 2C , 6 E,Q,V,2MI. N. OF HOLLYWOOD RD.KERLEY CHEMICAL 44013 12 MILES FROM EAST OF BIG LAKE ON US 67SOLVENTS 6/9/86 0 , 5 E* MANN JAMES110947 98 MAIN ST, BIG LAKEGASOLINE 3/26/96 2 , 2A E,QSOUTHWEST BANK 101334 409 2ND ST, BIG LAKEGASOLINE 12/10/91 2 , 2A E,Q* BILLY JOE BRICE110191 HWY 83, LEAKEYGASOLINE 3/4/95 2 , 2A E,QMAXEY ENERGY CO 106848 HWY 83, LEAKEYGASOLINE 6/21/93 2 , 4 E,Q* C & S STORES INC112194 HWY 271, BOGATAUNKNOWN 3/28/97 2 , 2A E,QCLARKSVILLE HISTORICAL SOCIETY 101262 401 W BROADWAY, CLARKSVILLEGASOLINE 12/17/91 2A , 1A E,QCLARKSVILLE OIL & GAS CO INC 100887 906 W MAIN ST, CLARKSVILLEGASOLINE 11/25/91 1B , 1A E,QFFP OPERATING PARTNERS, LP 099187 HWY 82, ANNONAGASOLINE 6/3/91 2 , 2A E,QKELLY ROBINSON 097759 HWY 82, AVERYGASOLINE 9/25/90 1B , 1A E,QPYEATT GAS & OIL CO 101025 315 W MAIN ST, CLARKSVILLEDIESEL 11/25/91 1B , 1A E,QWOOLEY OIL CO 101027 300 W MAIN ST, CLARKSVILLEGASOLINE, DIESEL 11/25/91 2 , 2A E,QDICK PATILLO - OWNER OF WAYNE FEEDS 8708250101 WAYNE FEED STORE - NEAR INTERSECTION OF 2ND DDT, DIELDRIN, METHYLAND PLUM IN PECOS, TXPARATHIONALLSUP'S CONVENIENCE STORES 091630 708 S CEDAR, PECOSGASOLINE 1/14/88 2 , 2A E,Q* C F J PROPERTIES109493 100 PINEHURST, PECOSDIESEL 5/9/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092993 3RD, PECOSGASOLINE 5/5/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 105532 2100 VETERANS BLVD, PECOSGASOLINE, DIESEL 9/7/90 2 , 4 E,QCITY OF PECOS 105319 200 WALTHAL AVE, PECOSDIESEL 7/20/92 2A , 1A E,Q* ESTATE W E HOLLIS112863 2430 BALMORHEA HWY, PECOSUNKNOWN 12/29/97 1B , 1A E,QGAS-N-GO INC 091533 1500 W WASHINGTON, PECOSGASOLINE 11/4/87 2 , 2A E,Q2D , 2BE,Q,V,2,3TNRCC - 145

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236REEVESPSTREFUGIOPSTROBERTSPSTWUDJIM WAFER 108060 2300 VETERANS BLVD, PECOSGASOLINE 4/18/94 2 , 2A E,Q* JIM WAFER OIL CO INC100340 2108 VETERANS BLVD, PECOSWASTE OIL 9/25/91 1B , 1A E,QJIM WAFER OIL CO INC 101820 9TH ST, PECOSGASOLINE 2/6/92 5B , 1A E,Q* JIM WAFER OIL COMPANY101268 701 S EDDY, PECOSGASOLINE 12/6/91 2 , 2A E,QLOCKER OIL & CHEMICAL CO 095588 5001 S CEDAR, PECOSGASOLINE 5/14/90 2 , 2A E,QMERCHANTS FAST MOTOR LINES 093432 2ND ST, PECOSDIESEL 7/27/89 2 , 2A E,QNEWELL OIL 111500 104 N CYPRESS, PECOSGASOLINE 8/9/96 2 , 2A E,QNEWELL OIL CO 092765 702 W 3RD ST, PECOSGASOLINE 3/17/89 5B , 4 E,QNEWELL OIL CO 098110 5102 S CEDAR, PECOSGASOLINE 3/4/91 2 , 2A E,QPARKER BROTHERS INVESTMENT 102667 914 S EDDY, PECOSGASOLINE 4/9/92 1B , 1A E,QPECOS TIRE AND FUEL 094301 714 W 3RD ST, PECOSGASOLINE 10/5/89 2A , 1A E,QPOOL CO 095813 2000 BALMORHEA HWY, PECOSDIESEL 6/12/90 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 091544 IH-20, PECOSGASOLINE 11/5/87 2 , 3 E,QRIO GRANDE DISTRIBUTORS INC 093591 620 W 3RD, PECOSGASOLINE 8/25/89 5B , 4 E,QRIO GRANDE DISTRIBUTORS INC 111787 101 N CYPRESS, PECOSGASOLINE, DIESEL 10/9/96 1B , 1A E,QSIROCCO DEVELOPMENT CORP 111501 1100 S EDDY ST, PECOSGASOLINE 8/9/96 2 , 2A E,QSMITHERS AUTOMOTIVE TEST OF TX 099970 FM 1450, PECOSGASOLINE 8/22/91 2A , 6 E,QTOWN & COUNTRY FOOD STORES 091597 915 W 3RD, PECOSGASOLINE 1/11/88 2 , 2A E,QTRANS PECOS GAS COMPANY INC 093354 134 3RD, PECOSGASOLINE 7/13/89 2 , 2A E,QTUMBLEWEED PETROLEUM CORP 111548 402 W 3RD ST, PECOSGASOLINE 8/23/96 2 , 2A E,QTUMBLEWEED PETROLEUM INC 111940 2323 TOLIVER, PECOSGASOLINE, DIESEL 10/10/96 2 , 2A E,QTUMBLEWEED PETROLEUM, INC. 094063 414 W 3RD ST, PECOSGASOLINE 11/15/89 2 , 2A E,QWEST TEXAS GAS INC 091515 2422 BALMORHEA HWY, PECOSGASOLINE 10/5/87 2 , 2A E,QWEST TEXAS GAS INC 101611 115 E 3RD ST, PECOSGASOLINE 1/17/92 2 , 2A E,QWEST TEXAS GAS INC 102980 10TH ST, PECOSGASOLINE 5/4/92 2 , 2A E,Q* WEST TEXAS GAS INC112872 201 E 3RD ST, PECOSGASOLINE 11/7/97 1B , 1A E,QCLAYBROOK VANCE 093384 201 S ALAMO, REFUGIOUNKNOWN 7/12/89 2 , 2A E,QCOASTLINE CONSTRUCTION CORP 097629 1000 W HOUSTON ST, REFUGIOGASOLINE, DIESEL 1/2/91 5B , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 094381 105 N ALAMO, REFUGIOGASOLINE 11/16/89 2 , 6 E,QMARTIN OCONNOR 106195 HWY 239, TIVOLIDIESEL 2/24/93 2 , 2A E,Q* NAYLOR OIL CO INC112589 519 N ALAMO, REFUGIOGASOLINE, DIESEL 8/22/97 2 , 2A E,QNAYLOR OIL CO., INC. 093516 611 S ALAMO, REFUGIOGASOLINE, DIESEL 8/17/89 2 , 3 E,Q* NEW DISTRIBUTING CO INC111565 801 S ALAMO, REFUGIOUNKNOWN 9/6/96 2 , 2A E,QREFUGIO MOTOR CO 111276 612 S ALAMO, REFUGIOUNKNOWN 7/1/96 2 , 2A E,QSSP PARTNERS 110143 218 N ALAMO, REFUGIOGASOLINE 11/14/95 2 , 2A E,QTAYLOR PRODUCTS 099882 411 S ALAMO, REFUGIOGASOLINE 8/12/91 2 , 2A E,QTEXAS STAR INVESTMENTS 102255 211 N ALAMO, REFUGIOGASOLINE 2/25/92 2 , 2A E,QUS DEPT OF INTERIOR 093319 FM 2040, AUSTWELLGASOLINE 7/14/89 2 , 2A E,QUS FISH & WILDLIFE 100222 HWY 774, AUSTWELLGASOLINE 9/19/91 2A , 1A E,QBAILEY OIL PRODUCTS CO 096902 104 COMMERCIAL ST, MIAMIGASOLINE 8/29/90 5B , 2A E,QUNKNOWN 096931 MIAMIGASOLINE 8/20/90 1B , 1A E,QMIAMI, CITY OF 1970002 SANTA FE WELL (G1970002B) - RAILROAD AND BENZENE, 1,2-DICHLOROETHANE,BIRGE ST. (FORMERLY CONSOLIDATED UTILITIES XYLENESTNRCC - 1468/31/90 2C , 5 E,Q,V,2

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236ROBERTSWUDWELL 2)ROBERTSONPCD/CAPCD/SUPPCD/VCPSTROCKWALLPSTRUNNELSPSTGATX - HEARNE 32643 HWY 6, HEARNE"OILY" SLUDGES, VOC'S,CHLORINATED SOLVENT7/15/90 2B , 4 ESTAR ENTERPRISE - HEARNE 35844 HWY 6, HEARNEBTEX, TPH 10/2/92 0 , 2A ESTAR ENTERPRISE PETROLEUM MARKETINGTERMINALHWY 6 SOUTH, HEARNEOIL, BTEX 6/17/93 0 , 4 E* HEARNE TERMINAL623 HIGHWAY 6 SOUTH, HEARNEPETROLEUM HYDROCARBONS 10/3/97 0 , 2 ECIRCLE K CORP 108769 606 MARKET ST, HEARNEGASOLINE 4/14/94 2 , 2A E,QE Z SERVE PETRO MARKETING CO. 099345 506 MARKET ST, HEARNEGASOLINE 6/26/91 2 , 2A E,QSOUTHLAND CORP 092611 901 BROWN ST, HEARNEGASOLINE 5/16/88 2 , 6 E,QBRISCOE OIL INC 093464 112 W RUSK, ROCKWALLGASOLINE 7/14/89 2A , 1A E,QE Z MART STORES INC 092018 2600 RIDGE RD, ROCKWALLGASOLINE 6/3/88 2 , 2A E,Q* MIKE BRADY112346 2500 FM 740, HEATHUNKNOWN 5/29/97 5B , 1A E,Q* PEKIM INC111780 2600 CHAMPION DR, ROCKWALLGASOLINE 10/15/96 2 , 2A E,QRESOLUTION TRUST CORPORATION 098274 ONE HARBORVIEW DR, ROCKWALLGASOLINE 3/13/91 2 , 4 E,QRICHARD SLAUGHTER 109155 407 A S GOLIAD, ROCKWALLGASOLINE 2/17/95 2 , 2A E,QTOTAL PETROLEUM INC 103724 2804 RIDGE RD, ROCKWALLGASOLINE 7/7/92 2 , 2A E,Q* TOTAL PETROLEUM INC111404 2255 S GOLIAD, ROCKWALLGASOLINE 7/17/96 2 , 2A E,Q* UNIVERSAL METRO HOLDINGS111721 715 W RUSK, ROCKWALLGASOLINE 9/19/96 2 , 2A E,QBAGWELL OIL CO 103729 413 HUTCHINGS, BALLINGERGASOLINE, WASTE OIL 7/3/92 2A , 1A E,QBOB LOYD L P GAS CO 099892 301 S MAIN, WINTERSGASOLINE, DIESEL 7/17/91 5B , 1A E,QBOB LOYD L P GAS CO 106255 HWY 153, WINGATEGASOLINE 2/3/93 5B , 1A E,Q* BOB LOYD L P GAS CO112328 620 HUTCHINS, BALLINGERWASTE OIL 5/13/97 2 , 2A E,Q* BOB LOYD L P GAS CO112341 201 N MAIN, WINTERSGASOLINE 5/28/97 2 , 2A E,Q* BOB LOYD L P GAS CO112726 104 E PARSONAGE, WINTERSGASOLINE 10/14/97 1B , 1A E,Q* BOB LOYD L P GAS CO112727 200 N MAIN ST, WINTERSGASOLINE 10/14/97 2A , 1A E,QCONTINENTAL PRODUCTS OF TEXAS 103806 1030 N MAIN, WINTERSGASOLINE 6/10/92 2A , 6 E,QHALLIBURTON SERVICES 102705 HWY 153, WINTERSGASOLINE, DIESEL 4/8/92 2 , 2A E,QPRIDE REFINING INC 102615 908 S MAIN ST, WINTERSGASOLINE, DIESEL 1/3/92 2 , 4 E,Q* R A BAGWELL OIL CO111367 HWY 67, ROWENAGASOLINE 6/28/96 2 , 2A E,QR A BAGWELL OIL CO 111368 903 N MAIN, WINTERSGASOLINE 6/28/96 2 , 2A E,QR A BAGWELL OIL CO 111369 1201 HUTCHINGS AVE ., BALLINGERGASOLINE, DIESEL 6/28/96 2 , 2A E,QR A BAGWELL OIL CO 111370 HUTCHINGS, BALLINGERGASOLINE, DIESEL 6/28/96 2 , 2A E,Q* R A BAGWELL OIL CO111468 6TH, BALLINGERGASOLINE, DIESEL 8/8/96 1B , 1A E,QRUNNELS COUNTY 105317 BALLINGER COURTHOUSE, MILESGASOLINE 11/6/92 2 , 2A E,QSCHNEIDER DIST CO 096114 1001 ROBINSON RD, MILESGASOLINE 6/25/90 2 , 5 E,QSKINNY'S INC. 110234 211 MAIN, WINTERSGASOLINE 5/19/96 2 , 2A E,QTNRCC - 147

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236RUNNELSPSTRUSKSABINEPSTPSTSAN AUGUSTINEPSTSAN JACINTOPSTSAN PATRICIOENF/WST* UNKNOWN112801 610 HUTCHINS, BALLINGERGASOLINE 11/24/97 1B , 1A E,Q* BATEMAN INC106695 100 HWY 795, HENDERSONGASOLINE, WASTE OIL 5/25/93 2 , 2A E,QBOLT FUEL OIL CO 101143 CTY RD 1122, LAIRD HILLGASOLINE, DIESEL 12/10/91 2 , 2A E,Q* CHUCK SWINDELL112698 HWY 79, HENDERSONGASOLINE, DIESEL 10/3/97 1B , 1A E,QCLIFFORD STARCHER 096683 FM 840, HENDERSONGASOLINE, DIESEL 9/7/90 5B , 2A E,QCOOPER SCOTT 100765 100 N HWY 79, HENDERSONGASOLINE, DIESEL 6/26/91 2 , 2A E,Q* D C DISTRIBUTORS110201 411 S HWY 79, HENDERSONGASOLINE 11/8/95 2 , 2A E,QD C DISTRIBUTORS INC 099685 701 W HWY 64, HENDERSONGASOLINE, CHEMICAL 7/30/91 2 , 5 E,Q* DOYLE GREEN109010 404 N HWY 79, HENDERSONGASOLINE, DIESEL 4/29/94 2 , 2A E,QGIBSON RAYFORD 106154 FM 1716, HENDERSONGASOLINE 2/15/93 2 , 2A E,QHARRIS BROS CO 099245 HWY 42, NEW LONDONGASOLINE 6/11/91 2 , 5 E,QJ. W. GREEN CONTRACTORS, INC. 104848 201 E HWY 323, OVERTONGASOLINE, DIESEL 10/1/92 1B , 1A E,Q* JOHN BATEMAN101543 314 HWY 79, HENDERSONGASOLINE 11/6/91 2 , 2A E,QJOHN LEE JONES 104967 3200 COUNTY RD, HENDERSONGASOLINE, DIESEL 10/14/92 1B , 1A E,Q* JOHN M BATEMAN CO INC103965 HWY 42, OVERTONGASOLINE, WASTE OIL 7/22/92 2 , 2A E,Q* JOHN M BATEMAN CO INC106921 HWY 13, PRICEGASOLINE 2/22/93 2 , 2A E,Q* KRIBY OIL CO INC112920 1001 COMMERCE, OVERTONGASOLINE 10/8/97 1B , 1A E,QMAY JOE R PIPE & SUPPLY CO 098276 513 E MCKAY ST, OVERTONGASOLINE 3/11/91 2 , 2A E,QNACOGDOCHES COCA COLA BOTTLING 099303 819 N MARSHALL ST, HENDERSONGASOLINE 6/19/91 2 , 6 E,QTATUM ISD 109727 HILL ST, TATUMGASOLINE, DIESEL 7/20/95 2 , 2A E,QTEXAS UTILITIES MINING CO 096798 HWY 149, TATUMGASOLINE 9/19/90 2 , 6 E,Q* TU ELECTRIC111462 FM 2658, TATUMUNKNOWN 9/17/96 2 , 2A E,Q* ZIPPY JS INC112169 1203 KILGORE DR, HENDERSONGASOLINE 3/7/97 2 , 2A E,Q* DAVID CAIN109506 HCR 1, MILAMUNKNOWN 10/18/94 5B , 1A E,QPENDLETON ASSOCIATES, INC. 092549 HWY 21, HEMPHILLGASOLINE 11/9/88 2 , 2A E,QTXDOT 098370 FM 1, BRONSONGASOLINE 3/18/91 2 , 2A E,QFINA OIL & CHEMICAL CO 092539 HWY 21, SAN AUGUSTINEGASOLINE 1/11/89 2 , 5 E,QTENNECO OIL INC 092230 IH--59, SHEPHERDGASOLINE 8/23/88 2 , 6 E,QTRINITY TEMPLE PENTECOSTAL CH 093508 HWY 59, SHEPHERDUNKNOWN 6/14/89 1B , 1A E,QE. I. DUPONT - INGLESIDE 30018 HWY 361, 3 MI EAST OF GREGORY, INGLESIDE TCE,CARBON TET,AS, CHLO 1/1/76 3B , 4 EGREENWAY AVIATION 36884 3 MI W. OF SINTON ON FM 881, SINTONARSENIC,PESTICIDES,HERBICIDES 7/28/89 4A , 2B EQVSAN PATRICIO COUNTY T0006 FM 881 3 MI W OF SINTON, SINTONARSENIC, PESTICIDES,HERBICIDES7/28/89 3B , 4A EQVWRIGHTWAY SPRAYING SERVICE 33773 FM 881 3 MI W OF SINTONARSENIC, PESTICIDES,HERBICIDES7/28/89 4A , 2B EQVTNRCC - 148

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236SAN PATRICIOMSWBFI/CITY OF SINTON: MW-6A, 6S, AND 12S. MSW00242A APPROX. 3 MI. SW OF SINTON, NW CORNER OF VOCs (TCE, PCE, VINYL CHLORIDE,INTERSECTION OF FM 1945 AND COUNTY RD. 39, 1,1-DICHLOROETHANE, AND 1,1-SINTON, TX.DICHLOROETHENE)6/7/91 3B , 4 E,Q,V,1,2PCD/CAPCD/ENFPCD/SUPPCD/VCPSTCHICAGO BRIDGE & IRON (CBI-NA-CON) 30309 FM 1069, INGLESIDESULFATES, ACID 11/30/71 2B , 5 EDUPONT - INGLESIDE 30018 HWY 361, 3 MI EAST OF GREGORYTCE, CARBON TETRACHLORIDE,ARSENIC, CHLORIDES,CHLOROFORMOCCIDENTAL CHEM CORP - GREGORY 38280 HWY 361, GREGORYCHLORIDES, CARBONTETRACHLORIDE,TETRACHLOROETHANE, TOX10/7/92 2 , 6C E,Q3/1/76 1B,3A , 1,4 ECOASTAL STATES CRUDE - SAN PAT. CO. 39989 NEAR INTER OF FM 1074 AND SH67, SAN PATR HYDROCARBONS 10/23/89 2A , 2A ECOASTAL STATES DIESEL RELEASE 83092 0.4 MI NORTH CR 72 AND CR 75BTEX, MTBE 2B , 3 EQV3COASTAL STATES JET FUEL RELEASE 83087 0.2 MI NORTH FM 1074 AND CR 893HYDROCARBONS AND BTEXCOMPOUND2B , 2A EQV3SINTON WATER WELLS 484930 1 MI. S. OF HWY. 77 AND FM 1945, SINTON, TX. BENZENE 10/12/94 5B , 4 E,Q,2* FORMER INGLESIDE OFFSHORE SERVICES 488 CARUTHERS COVE, OLD INGLESIDETPH, BTEX 3/10/97 0 , 2 EPROPERTY* PLX INGLESIDE, INC.449 1269 SUNRAY ROAD, INGLESIDETPH, SVOCS, METALS 2/5/97 1 , 2 E* UNDEVELOPED LAND - NEW PUBLIC SAFETYFACILITY150 8TH STREET AND STATE HIGHWAY 1069, INGLESIDE PETROLEUM 12/18/95 0 , 6 ECIRCLE K CORP 094129 102 SUNSET RD, GREGORYGASOLINE 11/27/89 2 , 4 E,QCIRCLE K CORP 098398 200 N VINYARD, SINTONGASOLINE 3/27/91 2 , 2A E,QCITIZENS BANK 104145 HWY 181, TAFTGASOLINE 8/12/92 2A , 1A E,QCITY OF ARANSAS PASS 110340 338 S ARCH, ARANSAS PASSGASOLINE 12/7/95 2 , 2A E,QCOASTAL MAVERICK 109544 706 MOORE AVE, PORTLANDGASOLINE 3/21/95 2 , 2A E,Q* COONROD ELECTRIC CO111324 224 N RACHAL, SINTONUNKNOWN 7/15/96 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO094452 1402 WILDCAT DR, PORTLANDGASOLINE 12/12/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 098683 302 HWY 181, TAFTGASOLINE 3/11/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 101867 320 W SINTON ST, SINTONGASOLINE 2/13/92 2 , 2A E,Q* E H GREEN MOTOR COMPANY105206 700 VOSS AVE, ODEMGASOLINE 11/5/92 2 , 2A E,QE I DUPONT DE NEMOURS 094072 HWY 361, INGLESIDEDIESEL 11/20/89 2 , 5 E,QFFP OPERATING PARTNERS 098208 716 MOORE AVE, PORTLANDGASOLINE 3/11/91 2 , 2A E,QFFP OPERATING PARTNERS 099833 N HWY 181, TAFTGASOLINE 8/1/91 2 , 2A E,Q* FFP OPERATING PARTNERS, LLP112654 500 BLK W SINTON, SINTONGASOLINE, DIESEL 12/12/97 1B , 1A E,QLYKES BROTHERS INC 102569 CTY 25, EDROYGASOLINE 4/3/92 2 , 2A E,QM I DRILLING FLUIDS CO 107635 HWY 361, ARANSAS PASSDIESEL 11/2/93 2 , 2A E,QMAGEE GASKINS INC 110127 1509 RAHT, ROCKPORTGASOLINE, DIESEL 11/29/95 2A , 1A E,QMAGEE GASKINS INC 110128 1627 WILDCAT, PORTLANDGASOLINE, DIESEL 11/29/95 2 , 2A E,QMAGEE GASKINS INC 110129 235 W CLEVELAND, ARANSAS PASSGASOLINE 11/29/95 2A , 1A E,QMOODY OIL CO 111256 839 WHEELER, ARANSAS PASSGASOLINE, DIESEL 7/1/96 2 , 2A E,Q* MOSS J.G.101009 400 S SAN PATRICIO, SINTONGASOLINE 11/25/91 2 , 2A E,QRAUL & ANGELITA GONZALES 096760 112 N MCCALL, SINTONDIESEL, GASOLINE 9/18/90 2 , 5 E,QROB DARVILLE 110126 133 N AVE B, INGLESIDEGASOLINE, DIESEL 11/29/95 2 , 2A E,QTNRCC - 149

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236SAN PATRICIOPSTSAN SABAPSTSCHLEICHERPSTSCURRYPSTSHACKELFORDPSTSHELBYMSWROBERT HARGROVE 101323 259 S COMMERCIAL, ARANSAS PASSGASOLINE, DIESEL, WASTE OIL 12/23/91 5B , 1A E,QROCKPORT HARBORFRONT LP 109614 1114 MAINSTREET, ROCKPORTDIESEL, WASTE OIL 12/16/94 2 , 6 E,QSAN PATRICIO COUNTY 097178 IH--37, EDROYGASOLINE, DIESEL 11/6/90 2 , 4 E,QSAN PATRICIO COUNTY 103627 221 SCOFIELD, SINTONUNKNOWN 6/26/92 2A , 6 E,QSSP PARTNERS 091912 204 E SINTON ST, SINTONGASOLINE 6/1/88 2 , 4 E,QSSP PARTNERS 092392 201 HWY 181, TAFTGASOLINE 11/18/88 2 , 4 E,QSSP PARTNERS 111121 430 S MAIN, INGLESIDEUNKNOWN 6/4/96 2 , 2A E,QT M GUNN CONSTRUCTION 100795 1902 W WHEELER, ARANSAS PASSDIESEL 11/5/91 2A , 6 E,QTESORO PETROLEUM DIST CO 104173 BISHOP RD, INGLESIDEDIESEL 6/3/92 2 , 4 E,Q* TIDEPORT PETROLEUM INC106052 121 GREEN AVE, TAFTUNKNOWN 2/8/93 2 , 2A E,QCITY OF SAN SABA 101513 302 E WALLACE, SAN SABAGASOLINE 1/8/92 2 , 2A E,QRICHLAND SPRINGS ISD 109895 W HWY 190, RICHLAND SPRINGSUNKNOWN 8/31/95 2 , 6 E,QSAN SABA BUTANE 101511 113 S HIGH, SAN SABAGASOLINE 1/8/92 2 , 2A E,QHALBERT L P GAS 091526 101 S DIVIDE, ELDORADOGASOLINE 10/27/87 2A , 1A E,QALLSUPS PETROLEUM 111612 3911 COLLEGE AVE, SNYDERGASOLINE 4/6/96 2 , 2A E,QBILL BURNS OIL CO 111316 1511 26TH ST, SNYDERGASOLINE, DIESEL 6/28/96 2 , 2A E,QBUNCH OIL CO 099144 3611 COLLEGE AVE, SNYDERGASOLINE 5/28/91 5B , 1A E,Q* CARL BALLARD112197 1304 E COLISEUM, SNYDERUNKNOWN 3/28/97 2 , 2A E,QCITY OF SNYDER 098621 37TH, SNYDERGASOLINE 2/20/91 2 , 2A E,QCITY OF SNYDER 108955 1111 37TH ST, SNYDERGASOLINE 10/14/94 2 , 2A E,Q* DENSON HAROLD111049 300 COLISEUM DR, SNYDERUNKNOWN 5/22/96 2 , 2A E,QE L FARMER & CO 093536 1905 11TH ST, SNYDERGASOLINE 7/24/89 2 , 4 E,QEXXON COMPANY USA 095885 FM 1610, SNYDERUNKNOWN 6/11/90 2 , 6 E,Q* LINE AND LINE OIL COMPANY112268 3501 COLLEGE AVE, SCURRYUNKNOWN 4/25/97 1B , 1A E,QM & M FUELS 109673 HWY 84, HERMLEIGHGASOLINE 5/30/95 1B , 1A E,QMIDWEST ELECTRIC CO-OP INC 093472 2300 COLLEGE AVE, SNYDERGASOLINE 7/18/89 2 , 2A E,QPRIDE COMPANIES LP 096189 HWY 84, SNYDERGASOLINE 6/19/90 2 , 2A E,QSCURRY COUNTY 094461 RT 1, SNYDERAV-GAS 12/13/89 2 , 2A E,QSNYDER PUBLIC SCHOOLS 093762 2901 37TH ST, SNYDERGASOLINE 8/29/89 2 , 2A E,QCAWTHRON OIL INC 104125 HWY 180, ALBANYUNKNOWN 7/24/92 2 , 2A E,QCONOCO SERVICE CENTER, INC. 099502 135 MAIN ST, ALBANYGASOLINE, DIESEL 7/11/91 2 , 2A E,QHAROLD G LAW 100993 421 S MAIN ST, ALBANYGASOLINE 11/22/91 2A , 1A E,QSAZAMA FUEL 104725 127 HILL ST, ALBANYGASOLINE, DIESEL 9/4/92 1B , 1A E,QUNKNOWN 099055 317 S 3RD, ALBANYGASOLINE 5/24/91 5B , 1A E,QCITY OF CENTER: P-2S AND 5S. MSW00409 END OF MAXWELL ST., CENTER, TX.VOCs (CHLOROBENZENE, 1,4-DICHLOROBENZE, AND 1,1-DCIHLOROETHANE)2/4/91 2A , 1A E,Q,V,2TNRCC - 150

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236SHELBYPSTSHERMANPSTSMITHENF/WSTMSWPCD/CAPCD/VCPSTCRAWFORD ROBYN 098455 HWY 59, TIMPSONDIESEL 3/14/91 2 , 6 E,QCRUMP OIL COMPANY 100847 HWY 96, TENAHAGASOLINE 10/4/91 2 , 2A E,QCURRENT OCCUPANT 101398 202 TENAHA, CENTERGASOLINE 12/27/91 2A , 1A E,Q* FFP OPERATING PARTNERS094602 907 HURST, CENTERGASOLINE 1/23/90 2 , 2A E,QFFP OPERATING PARTNERS 098292 815 SHELBYVILLE ST, CENTERGASOLINE 3/13/91 1B , 1A E,QJONES MAURENE 103280 225 SAN AUGUSTINE, CENTERGASOLINE 6/2/92 2A , 6 E,QPARK D E 099484 FM 139, SHELBYVILLEGASOLINE 7/11/91 2 , 6 E,QROY HUTTO 108652 HWY 59, TIMPSONGASOLINE 4/6/94 5B , 2A E,QOLIVE BOSTON ESTATE 103192 301 TEXAS AVE, STRATFORDGASOLINE 5/15/92 2 , 2A E,QALLIED MOTOR OILS/ALLIED TRANSPORT 96141 1602 W. HOUSTON, TYLERTPH,BTEX 3/28/89 4A , 1B EQAMERICAN ECOLOGY 32123 13640 HWY 155N,TYLERCHLOROBENZENE,1,1-10/30/90 0 , 2 EDICHLOROETHENE,METHYLEAMERICAN ECOLOGY (GIBRALTAR CHEMICAL) 39299 2 MI SOUTH OF WINONACHLORINATED SOLVENTS 10/3/90 0 , 2 EHOWE-BAKER ENGINEERS, INC 39421 FM 850 EAST OF TYLERVOC (TOLUENE, MEK) 7/31/91 1A , 3B EQV2LA GLORIA OIL & GAS CO. 30872 EAST COMMERCE AT MCMURTRY, TYLERPETROLEUM, GASOLINE, BTEX 12/1/85 3B , 5 EQV23CITY OF TYLER: MW-1, 2, 5, 6, AND B2 MSW00690 1.0 MI. W OF INTERSECTION OF FM 2908 AND FM VOCs (TCE, PCE) 9/18/90 2A , 2A E,Q,V,22767, ON S SIDE OF FM 2767, TYLER, TX.FERRO CORP. 32680 1812 E. DUNCAN, TYLERTPH, BTEX, SPENT SOLVENTS 10/15/93 2A , 1A EQV2LA GLORIA OIL & GAS CO. 30872 EAST COMMERCE AT MCMURTRY, TYLERPETROLEUM, GASOLINE, BETX 12/1/85 3B , 5 E,Q,V,2TYLER PIPE 30140 US 69, 4 MILES N OF LOOP 323, TYLERCHLORIDE, FLOURIDE, SODIUMSULFATE5/19/83 3A , 2A E,QCOLOR TILE STORE 379 1621 SOUTH BROADWAY, TYLERVOC 10/22/96 0 , 0 E* COOPER CAMERON CORPORATION550 1520 EAST LAUREL STREET, TYLERMETALS 6/23/97 0 , 2 EA 1 RENT ALL INC 100609 117 SHELLEY DR, TYLERGASOLINE 10/4/91 2 , 2A E,QABF FREIGHT SYSTEMS INC 098780 3201 E GENTRY BLVD, TYLERGASOLINE, DIESEL, WASTE OIL 4/22/91 2 , 2A E,QABRAHAM OIL COMPANY 093263 1515 S VINE ST, TYLERGASOLINE 5/30/89 2 , 2A E,QALLIED MOTOR OILS INC 096141 1609 W HOUSTON ST, TYLERGASOLINE, DIESEL 6/10/88 2 , 3 E,QALLIED TRANSPORT CO 097103 734 FLEISHEL, TYLERGASOLINE 10/24/90 2 , 2A E,QARP ISD 096038 105 SCHOOL ST, ARPGASOLINE 6/27/90 2 , 6 E,QATLAS WIRELINE SERVICE 095981 FM 2767, TYLERGASOLINE 5/8/90 2 , 2A E,QAUTOMATED & CUSTOM FOOD SERVIC 098309 FREEDLINE, TYLERGASOLINE, WASTE OIL 3/19/91 2 , 4 E,Q* BAROID DRILLING FLUIDS INC109615 1625 JOHN CARVEY DR, TYLERGASOLINE 6/9/95 2 , 2A E,QCARR CARRY 104932 HWY 69 AND FM 344, BULLARDGASOLINE 10/8/92 2A , 2A E,QCHEROKEE COLUMBUS REAL ESTATE 093917 805 W FRONT ST, TYLERGASOLINE 10/25/89 2 , 2A E,QCITY OF TYLER 098812 400 W OAKWOOD ST, TYLERGASOLINE, DIESEL 4/14/91 2 , 2A E,QCITY OF TYLER 105584 TYLERGASOLINE 12/2/92 2 , 2A E,QCOCA COLA ENTERPRISES INC 091479 3200 W GENTRY PKWY, TYLERDIESEL 10/1/87 2 , 4 E,QCOLLECTING BANK NATIONAL ASSOC 094554 1328 E GENTRY RD, TYLERGASOLINE 6/2/89 2 , 3 E,QTNRCC - 151

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236SMITHPSTDENNIS DARRYL 097210 825 BERGFIELD, TYLERGASOLINE 11/7/90 5B , 1A E,QENTEX INC 094337 310 MCMURRAY, TYLERGASOLINE 12/6/89 2 , 2A E,QFDIC 096374 E HWY 31, TYLERDIESEL 8/1/90 2 , 2A E,QFDIC 100102 313 MARTIN LUTHER KING BLVD, TYLERGASOLINE, WASTE OIL 9/6/91 2A , 1A E,QFERRO CORP 102212 1812 E DUNCAN ST, TYLERGASOLINE 2/25/92 2 , 2A E,QFFP OPERATING PARTNERS 093181 351 S GLENWOOD, TYLERUNKNOWN 6/17/89 2 , 2A E,Q* FFP OPERATING PARTNERS, LP104367 907 S MAIN, LINDALEGASOLINE 8/14/92 2A , 1A E,QFIRST CITY SERVICING CORP 101636 OLD JACKSONVILLE HWY, FLINTGASOLINE 1/23/92 2 , 2A E,QFLOWERS BAKING CO 097445 1200 W ERWIN, TYLERGASOLINE, DIESEL 11/28/90 2A , 2A E,QFOOD FAST CO 111856 13168 E HWY 64, CHAPEL HILLGASOLINE, DIESEL 10/9/96 2 , 2A E,QFUEL DISTRIBUTORS INC 095757 205 E VALENTINE, TYLERGASOLINE 3/8/90 2A , 2A E,QGLASS OIL COMPANY 093261 1634 S VINE ST, TYLERGASOLINE 6/15/89 2 , 2A E,QGLASS OIL COMPANY 093539 2523 SE LOOP 323, TYLERDIESEL 8/22/89 2 , 2A E,QGREEN OIL CO 106772 HWY 155, WINONAGASOLINE, DIESEL 4/30/93 2 , 2A E,QHAROLD POPE & KENNY POPE 097966 5225 S BROADWAY, TYLERGASOLINE 2/7/91 5B , 2A E,QHIDE A WAY LAKE MARINA 095682 HIDE A WAY LN, LINDALEGASOLINE 5/3/90 2A , 2A E,QJAMAL MOHARER 095526 401 BOIS D'ARC, TYLERGASOLINE 5/1/90 2A , 1A E,QJEWELL ENVIRONMENTAL INC 106877 603 WHITESIDE RD, TYLERDIESEL 5/5/93 2 , 2A E,QJFM, INC.(SUNBURST ENERGY DIV) 100854 101 N HWY 110, WHITEHOUSEGASOLINE 11/12/91 2 , 2A E,QJOE TARRANT OIL CO 091898 N HWY 271, TYLERGASOLINE 5/13/88 2 , 2A E,QJOHN SOULES FOOD INC 108846 308 N PALACE AVE, TYLERGASOLINE 5/25/93 2A , 1A E,QKEELING EVIE ESTATE 092964 GEORGIA, TROUPUNKNOWN 4/25/89 1B , 1A E,QKENT KELLUM 092104 N HWY 135, ARPUNKNOWN 5/13/88 1B , 1A E,QKIM HAWKINS 098035 312 W MARTIN LUTHER KING BLVD, TYLERGASOLINE 7/17/90 5B , 2A E,QKIRBY OIL CO 095391 403 MARTIN LUTHER KING BLVD, TYLERGASOLINE 4/10/90 2 , 2A E,Q* KIRBY OIL CO107758 2010 W GENTRY, TYLERGASOLINE 11/16/93 2 , 2A E,QKIRBY OIL CO 108845 500 N PALACE AVE, TYLERGASOLINE 11/1/93 1B , 1A E,Q* KIRBY OIL CO112751 6500 S BROADWAY, TYLERGASOLINE 9/25/97 1B , 1A E,Q* KIRBY OIL CO INC112921 HWY 110, TROUPGASOLINE 10/8/97 1B , 1A E,Q* KIRBY OIL CO INC112922 16772 FM 2493 3, GRESHAMGASOLINE 10/14/97 1B , 1A E,QLAUGHLIN STAN 105212 1405 TROUP HWY, TYLERGASOLINE, WASTE OIL 10/19/92 2 , 2A E,QM-PAX CONVENIENCE STORES 091236 1516 S VINE AVE, TYLERGASOLINE 1/1/84 2 , 6 E,QMARVIN ELLIS 103494 2021 GENTRY, TYLERGASOLINE 11/12/91 5B , 1A E,QMARY ETTA SALAS -HSBD DECEASED 096447 110 N CLAYTON, TYLERGASOLINE, DIESEL 6/21/90 5B , 2A E,QPACE OIL CO 094412 1811 S GRAND, TYLERGASOLINE 12/21/89 2 , 2A E,QPARROTT BILL 102406 COOPER ST, LINDALEGASOLINE, WASTE OIL 3/27/92 2 , 5 E,QR T HOPSON 106212 W HWY 64, TYLERGASOLINE 2/22/93 2 , 6 E,QREX HIDE INDUSTRIES INC 097742 705 S LYONS, TYLERCHEMICAL 1/8/91 2 , 2A E,QSAM R. HILL WAREHOUSE CORP. 096443 N FLEISHEL, TYLERGASOLINE 8/7/90 2 , 2A E,QSMITH COUNTY FIRE MARSHAL 098602 CTY RD 4112, LINDALEGASOLINE, DIESEL 4/10/91 2 , 2A E,QSOUTHLAND CORP 091822 109 N CLAYTON, TYLERUNKNOWN 4/15/88 2 , 2A E,QSOUTHLAND CORP 103925 2121 E LOOP 323, TYLERGASOLINE 7/20/92 2 , 2A E,Q* SPEEDY STOP/RETAIL PROPERTY PA108771 532 S BROADWAY, TYLERGASOLINE 10/4/94 2 , 2A E,QSTAR ENTERPRISE 099051 IH--20, SWANGASOLINE 5/16/91 2 , 2A E,QSTRASBURGER ENTERPRISES INC 103684 2626 E TH, TYLERGASOLINE 6/30/92 2 , 2A E,QSTRASBURGER ENTERPRISES INC 103708 334 S BECKHAM, TYLERGASOLINE, DIESEL 6/30/92 2 , 2A E,QSTRASBURGER ENTERPRISES INC 103736 2715 N NW LOOP 323, TYLERGASOLINE, DIESEL 6/28/92 2 , 2A E,QSTRASBURGER ENTERPRISES, INC. 099358 1400 E COMMERCE ST, TYLERGASOLINE 6/21/91 2 , 4 E,QTNRCC - 152

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236SMITHPSTSOMERVELLPCD/ENFSTARRPSTSTEPHENSPSTSTERLINGPSTSTONEWALLPSTTEXACO REF. & MARKETING 094034 IH-20, TYLERGASOLINE 11/2/89 1B , 1A E,QTEXACO REFINING & MARKETING 093328 IH-20, TYLERUNKNOWN 7/31/89 2 , 4 E,Q YTJB PARTNERS 098638 1321 LAKE PLACID, TYLERGASOLINE, DIESEL 4/12/91 2 , 2A E,QTOEWS MRS DONNA JEAN 098461 825 N BECKHAM, TYLERGASOLINE, DIESEL, CHEMICAL 4/2/91 2A , 1A E,Q* TOTAL PETROLEUM INC111475 3801 CHANDLER HWY, TYLERGASOLINE 8/1/96 2 , 2A E,QTRUMAN ARNOLD COMPANIES 093262 1637 S VINE ST, TYLERGASOLINE 6/15/89 2 , 2A E,QTRUMAN ARNOLD COMPANIES 093772 IH-20, TYLERGASOLINE 5/24/89 2 , 2A E,QTRUST/FIRST CITY TEXAS BANK 094852 124 S COLLEGE, TYLERGASOLINE 2/6/90 2 , 2A E,QTUNEUP MASTERS INC 095736 400 S BECKHAM ST, TYLERWASTE OIL 6/5/90 1B , 6 E,QTX E 1ST LIMITED LIABILITY CO 093463 4219 S BROADWAY, TYLERGASOLINE 7/20/89 2 , 2A E,QTXDOT 098970 NEW FRANKSTON HWY, TYLERDIST F OIL 5/15/91 2 , 2A E,Q* TYLER AERO112106 TYLER POUNDS FIELD, TYLERUNKNOWN 2/3/97 2 , 2A E,Q* TYLER BANK & TRUST N A112716 422 N HWY 110, WHITEHOUSEUNKNOWN 10/14/97 1B , 1A E,QTYLER ISD 099485 1335 W 8TH ST, TYLERWASTE OIL 7/11/91 2 , 2A E,QTYNER R D 099242 425 N BOIS D'ARC, TYLERGASOLINE 6/11/91 5B , 6 E,QUNKNOWN 092079 N HWY 135, ARPGASOLINE 5/13/88 1B , 1A E,QUNKNOWN 109800 1800 BROADWAY, TYLERUNKNOWN 2/20/95 2A , 1A E,QWAGNER CADILLAC CO 096648 4100 S BROADWAY, TYLERGASOLINE, WASTE OIL 8/31/90 2 , 6 E,Q* WALTER JOHNSTON110637 1326 W BOW, TYLERUNKNOWN 3/20/96 2A , 1A E,QWRIGHT STORY 103369 415 N BONNER, TYLERGASOLINE 6/3/92 5B , 1A E,QYOUNG CLARENCE PROPERTY 094056 301 E FRONT ST, TYLERGASOLINE 11/15/89 5B , 1A E,QTU ELECRIC - COMANCHE PEAK STEAMELECTRIC STATION33306 GLEN ROSE, TXORGANICS 3/12/89 3A , 3 EQVDIAZ UBALDO 105643 4343 E HWY 83, RIO GRANDE CITYGASOLINE 3/10/93 2 , 2A E,QDIAZ UBALDO 105652 4359 E HWY 83, RIO GRANDE CITYGASOLINE 12/23/92 2 , 2A E,QELOY GARZA 108163 E HWY 83, RIO GRANDE CITYGASOLINE, DIESEL 5/4/94 2A , 1A E,QTHOMAS ARMSTRONG 102288 FORT RINGOLD, RIO GRANDE CITYGASOLINE 4/13/92 1B , 1A E,QBILLY SAM FAMBRO 091668 BAYLOR, BRECKENRIDGEGASOLINE 9/1/87 5B , 2A E,QCAWTHRON OIL 109685 1602 W WALKER, BRECKENRIDGEGASOLINE 7/10/95 2 , 2A E,QCITY OF BRECKENRIDGE 100776 507 E WALKER, BRECKENRIDGEGASOLINE 11/4/91 2 , 6 E,Q* CRIDER & PEEKS110008 301 S BRECKENRIDGE AVE, BRECKENRIDGEGASOLINE 10/30/95 2 , 2A E,QKING HOERMANN OIL CO 091661 114 N BRECKENRIDGE AVE, BRECKENRIDGEGASOLINE, WASTE OIL 3/1/86 2 , 6 E,QTXDOT 099531 HWY 87, STERLING CITYGASOLINE 6/21/91 2 , 6 E,QWYN-LOR 109994 401 WASHINGTON, STERLING CITYDIESEL 10/18/95 2 , 2A E,QASPERMONT ISD 094784 PO BOX 549, ASPERMONTGASOLINE 1/29/90 2 , 2A E,QG & M OIL CO INC 094833 HWY 83, ASPERMONTDIESEL 1/30/90 2A , 2A E,QTNRCC - 153

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236STONEWALLWQDSUTTONPSTSWISHERPCD/SUPPSTTARRANTENF/WSTENF/WTRFODIHWMSWPCD/CATDA PESTICIDE SURVEY 2141406 WELL NO. 21-41-406 (SAMPLE NO. 0686-91-026) ATRAZINE, PROMETON 10/24/90 2D , 1 V,2,3"STONEWALL 1"TDA PESTICIDE SURVEY 2141426 WELL NO. 21-41-426 (SAMPLE NO. 0686-91-027) PROMETON 10/24/90 2D , 1 V,2,3"STONEWALL 4"DOWELL SCHLUMBERGER INC 094126 106 3RD, SONORACHEMICAL 10/19/89 2 , 6 E,QCITY OF HAPPYTDH#2190001MUNICIPAL WELL #3, HAPPY, TX.CARBON TETRACHLORIDE 5/6/91 1B , 1B Q* TULIA WHEAT GROWERS INC109954 HWY 86, TULIAGASOLINE 10/19/95 2 , 2A E,Q* TXDOT107266 HWY 87, TULIAGASOLINE 7/25/92 2 , 2A E,QYOUNG & ELLIS 095342 N HWY 87, KRESSGASOLINE 3/26/90 2 , 2A E,QADVANCED GRAPHICS 30346 942 MINTERS CHAPEL ROAD, GRAPEVINECHROMIUM 7/2/91 2C , 3 EQAMBER PIPELINE COMPANY F0010 6700 PLEASANT RUN ROAD, COLLEYVILLEBTEX, GASOLINE 11/2/94 3B , 2A EQVAMBER REFINING 30980 INT. OF NE 28TH AND SYLVANIA ST., FORT WORTH BTEX, HYDROCARBONS 2/22/87 4A , 2A EQVBOYLES GALVANIZING 30016 625 HURST BLVD., HURSTMETALS, CHLORIDES 11/15/83 3B , 2A ECHEMSCOPE CORPORATION 65395 3200 EAST RANDALL MILL RD, ARLINGTONVOCS 3B , 2A V2HUNTINGTON TILE/PACIFIC CERAMICS 38142 3600 CONWAY, FORT WORTHLEAD 3/3/89 3A , 5 EQV23TU ELECTRIC - FT. WORTH 39927 210 N.W. 4TH ST., FORT WORTHPB,CADMIUM,CR,TPH,EPTOXLEAD 7/7/92 2B , 4 EUNION PACIFIC 00780 1 MI. SW OF I30 AND UNIVERSITY DRHYDROCARBON 3B , 4 E,Q,VUSGS - TRINITY RIVER NAWQA PROJECT XU-32-23-315 1308 BOWEN ROAD, ARLINGTON, TXVINYLCHLORIDE,TRICHLOROETHYLENE8/10/93 1D , 6BORDEN GRAPHICS FACILITY 31260 3221 E. RANDOL MILL ROAD, ARLINGTONBENZENE, TOLUENE 5/2/97 3A , 2A ELAIDLAW/CITY OF FORT WORTH: MW-9 AND 103 MSW00464A BETW. LITTLE FOSSIL AND BIG FOSSIL CREEKS, SOF MIDWAY RD & ROCK ISLAND RR, 300 FT S OF SH121, AND 0.4 MI. N OF ELLIOT READERS RD., FORTWORTH, TX.VOCs (ACETONE, BENZENE,CHLOROBENZENE, AND 1,4-DICHLOROBENZENE)WMI, INC./CITY OF FORT WORTH (EASTSIDE):MW-1R1/30/91 2A , 2A E,Q,V,2MSW01004 ADJ. TO AND ON THE S. SIDE OF E. FIRST ST. BETW. TOC, AND SODIUM 4/19/93 0 , 2B E,Q,V,1,2THE W. FORK OF THE TRINITY R. AND RANDOL MILLROAD, FORT WORTH, TXAIR FORCE PLANT #4 (LOCKHEED FORT WORTH 30584 1500 NORTH GRANTS LANE, FORT WORTHORGANICS, TCE, METALS 10/1/82 5A , 3 E,QCO.)ANCHOR METALS INC 34659 645 W. HURST BLVD., HURSTSOLVENTS, CHROMIUM, ZINC 10/19/89 2A , 2A EBELL HELICOPTER TEXTRON 30406 600 E HARST BLVD, FORT WORTHCHROMIUM 6/8/92 2B3AB , 2A E,QCARSWELL AIR FORCE BASE 65004 NAVAL AIR STATION FT.WORTH JOINT RESERVE TCE,ORGANICS 11/8/91 3A , 4 E,Q,V,2,3BASETNRCC - 154

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPCD/CAPCD/ENFPCD/SUPPCD/VCFAMCO /CLOVER CORNER PROPERTY T0058 4101 CAMP BOWIE BLVD., FT. WORTHVOC 3/24/92 0 , 3 E,Q,VJEMTEX ACQ. INC. T0025 BEDFORDARSENIC, BARIUM, CADMIUM, 8/15/90 0 , 2A EQCHROMIUM, NICKSTAR ENTERPRISE - FT. WORTH 34146 701 RD TO SIX FLAGS, FT. WORTHPETROLEUM HYDROCARBONS 8/10/93 0 , 2A EAMERICAN CYANAMID COMPANY (CYTEC) 30023 600 NORTH JONES ST., FORT WORTHMB,CO,NI,CU,VA 9/20/89 2B , 2A EAVIALL OF TEXAS, INC. 30430 6114 FOREST PARK ROAD, SUITE BJET FUEL, TCE, HALOCARBONS 12/1/89 0 , 4 EQV2BORDEN CHEMICAL 31260 3221 EAST RANDOL MILL RD., ARLINGTONVOC'S 10/12/89 2B , 2A EQV23BUMPER SERVICE 34480 2726 CHESSER BOYER ROAD, FORT WORTHCHROMIUM ,2C,2ACHEVRON USA - FORT WORTH 31862 2525 BRENNAN ST.,FORT WORTH, TXBTEX,TPH 7/22/93 2C , 2A ECONOCO/CITGO TERMINAL 33988 SOUTHLAKE TERMINAL, GRAPEVINE, TXBTEX 1/22/93 0 , 2A QHUNTINGTON TILE/PACIFIC CERAMICS 38142 FT. WORTH, TXLEAD 3/3/89 3A , 5 EQV23TANDY MAGNETICS 31442 401 NORTHEAST 38TH ST, FT WORTHTHF, TCE, TOLUENE 12/1/89 1A , 4 EQV23BELL HELICOPTER/TEXTRON 600 E. HURST BLVD., FT. WORTHCHROMIUM 3/5/93 0 , 1 EMISSOURI PACIFIC RAILWAY AKA:TX PACIFICCENTENNIAL YARD, FORT WORTHCHROMIUM, ARSENIC, LEAD 11/22/85 1B , 1A ERAILROADSTAR ENTERPRISE PETROLEUM MARKETING3200 N. SYLVANIA AVE., FT. WORTHOIL, BTEX 9/30/92 0 , 2 ETERMINALSUPERIOR CHROME AKA:SENTRY, TX.2025 EAST ROSEDALE, FORT WORTHCHROMIUM 8/5/82 1B , 1A QAIRCRAFT ENGINEU.S. AIR FORCE PLANT #4 SUPERFUND SITE 19890515001 6 MILES WEST OF THE CENTER OF FORT WORTH.BORDERED BY LAKE WORTH ON THE NORTH, ANDCARSWELL AFB ON THE EASTTRICHLOROETHENE, VINYLCHLORIDE, DICHLOROETHENE5A , 3 E,Q,V,2,3* 2400 WEST FREEWAY AND 2000 NORTH FOREST 273 2400 WEST FREEWAY/2000 NORTH FOREST PARK, METALS, PETROLEUM6/13/96 0 , 2 EPARKFORT WORTHHYDROCARBONS* 25 ACRE TRACT465 WEST SEVENTH, FOCH AND STAYTON STREETS, HYDROCARBONS (GAS, DIESEL?) 2/19/97 0 , 2 EFORT WORTH* 4.7573 ACRE TRACT OF LAND (MESCO METAL) 446 NW CORNER OF HIGHWAY 114 AND KIMBALL AVE,SOUTHLAKEHYDROCARBONS 1/29/97 0 , 6 E* A-CLEANERS557 SW CORNER NW HIGHWAY AND PARK BOULEVARD, CHLORINATED SOLVENTS 7/1/97 0 , 4 EGRAPEVINE* ANADITE, INC.471 711 WEST HURST BOULEVARD, HURSTMETALS 2/19/97 0 , 2 E* ARLINGTON STONERIDGE SHOPPING CENTER 352 2400-2424 SOUTH COLLINS ROAD, ARLINGTON CHLORINATED SOLVENTS 9/24/96 0 , 3 EARMSTRONG HUGHES PROPERTY 321 12000 SOUTH PIPELINE ROAD, FORT WORTHTPH/METALS 8/14/96 0 , 2 E* AVENUE J BUILDING (PINNACLE BRANDS) 486 924 AVENUE J EAST, GRAND PRAIRIESOLVENTS 3/11/97 0 , 3 E* BERRY VILLAGE SHOPPING CENTER279 701 WEST BERRY STREET, FORT WORTHBETX 6/21/96 0 , 5 E* COACHMEN INDUSTRIES OF TEXAS, INC.518 729 EAST DALLAS ROAD, GRAPEVINESOLVENTS 5/2/97 0 , 2A E* DAVIS INDUSTRIAL PARK469 5205 DAVIS BOULEVARD, N. RICHLAND HILLSCHLORINATED SOLVENTS 2/19/97 0 , 2 EESTATE OF ADRIENNE GANS SIMON 141 5101 DAVIS BOULEVARD, N. RICHLAND HILLSPETROLEUM HYDROCARBONS,PERC11/8/95 0 , 1 E* HARWOOD CENTRAL VILLAGE SHOPPING 541 2101-2113 HARWOOD ROAD, BEDFORDCHLORINATED SOLVENTS 5/30/97 0 , 3 ECENTERINTERTURBINE DALLAS CASINGS DIVISION 250 2800 AVENUE E EAST, ARLINGTONSOLVENTS, METALS 5/10/96 0 , 3 EMAYFIELD VILLAGE SHOPPING CENTER 132 2501 MAYFIELD ROAD, ARLINGTONCHLORINATED SOLVENTS 10/19/95 0 , 3 E* OAKS AT CENTREPOINT I AND II APARTMENTS 441 14300 STATLER COURT, FORT WORTHMETALS 1/22/97 0 , 6 EONE HOUR MARTINIZING DRY CLEANERS 271 MAYFAIR VILLAGE/698 GRAPEVINE HIGHWAY,HURSTSOLVENTS 6/6/96 0 , 5 EROCK ISLAND/HILL SIDE REDEVELOPMENTPROPERTY266 CORNER OF HARDING AND FOURTH STREETS, FORT SOLVENTS, VOCS, SVOCS 5/28/96 0 , 2B EWORTHTNRCC - 155

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPCD/VCPST* S & B TECHNICAL PRODUCTS497 1300 EAST BERRY STREET, FORT WORTHSOLVENTS 4/3/97 0 , 2A E* W. J. HOLLAND SURVEY168 SE CORNER US HWY 377/ WALL-PRICE KELLER, METALS 1/25/96 0 , 6 EKELLER* 846274 TEXAS INC111232 1631 NEW YORK AVE, ARLINGTONUNKNOWN 6/21/96 2 , 2A E,QA1 CLASSIC AUTO BODY & SALE 103861 2117 W DIVISION ST, ARLINGTONGASOLINE 7/14/92 5B , 2A E,QABF FREIGHT SYSTEM, INC. 091559 2802 CULLEN, FORT WORTHGASOLINE 10/15/87 2 , 6 E,QADMAN, CECIL 106611 5738 CAMP BOWIE BLVD, FORT WORTHGASOLINE 5/10/93 2A , 1A E,QADVANCE PETROLEUM 091314 7108 JACKSBORO HWY, LAKE WORTHUNKNOWN 1/1/84 2A , 6 E,QADVANCE PETROLEUM 100844 8401 CLIFFORD, WHITE SETTLEMENTGASOLINE 11/12/91 2 , 2A E,Q* AKRAMS F RIHANI INC107595 5400 BRENTWOOD STAIR RD, FORT WORTHDIESEL 12/10/93 2A , 1A E,QALLEN SAMUELS ENTERPRISE 108262 7740 NE LOOP 280, NORTH RICHLAND HILLSHYDR FLUID 4/11/94 2 , 6 E,Q* ALTON FOSTER112680 5112 COLLEYVILLE BLVD, COLLEYVILLEUNKNOWN 10/1/97 1B , 1A E,QAMERICAN AIRLINES INC 110404 2000 EAGLE PKWY, FORT WORTHGASOLINE 1/9/96 2A , 6 E,QAMERICAN RED CROSS 093087 1308 S RETTA, FORT WORTHGASOLINE 5/9/89 2 , 6 E,QANTHONY CRANE RENTAL INC 097836 5701 DENTON HWY, FORT WORTHDIESEL 1/22/91 2A , 2A E,QAPAC TEXAS INC 103911 505 NW 5TH ST, FORT WORTHGASOLINE, DIESEL 7/20/92 2 , 4 E,QARLINGTON LAND JOINT VENTURE 093404 2005 E COPELAND, ARLINGTONGASOLINE 7/20/89 2 , 4 E,QAZLE STATE BANK 091745 HWY 199, AZLEGASOLINE 3/1/87 5B , 2A E,QB J CORNERS C/O GUDIA SLAVICH 111967 3000 W 7TH ST, FORT WORTHGASOLINE, DIESEL, WASTE OIL 12/2/96 2 , 2A E,Q* B J SERVICES112942 7609 WHITE SETTLEMENT RD, WHITE SETTLEMENT WASTE OIL 8/13/97 1B , 1A E,QB N S F 111447 1198 KELLER HASLET RD, HASLETOTHER 8/5/96 1B , 6 E,QBARNEY HOLLAND OIL CO 091868 103 N SAGINAW BLVD, SAGINAWGASOLINE 2/28/88 2 , 6 E,QBARNEY HOLLAND OIL CO 096932 2701 GREEN OAKS RD, FORT WORTHGASOLINE 10/10/90 2 , 6 E,QBARNEY HOLLAND OIL CO 103390 801 N MAIN ST, MANSFIELDGASOLINE 6/5/92 2 , 2A E,Q* BARNEY HOLLAND OIL CO112492 1200 E WEATHERFORD, FORT WORTHGASOLINE, DIESEL 8/19/97 1B , 1A E,QBATES CONTAINER INC 091667 6433 DAVIS BLVD, NORTH RICHLAND HILLSDIESEL 2/16/88 2 , 2A E,Q* BERNARD MCGARRY112240 780 BEDFORD EULESS RD, HURSTUNKNOWN 3/17/97 2A , 6 E,QBERRY STREET CENTRE LTD PRTSHP 105628 3100 S UNIVERSITY DR, FORT WORTHUNKNOWN 10/9/92 1B , 1A E,QBERRYMAN PRODUCTS INC 092015 3800 E RANDOL MILL RD, ARLINGTONCHEMICAL 7/20/88 2 , 2A E,QBILL HOLDER 106220 4413 TRAIL LAKE DR, FORT WORTHGASOLINE 11/12/92 5B , 2A E,QBONNET RESOURCES CORP 097660 935 N MAIN, FORT WORTHGASOLINE, DIESEL, WASTE OIL 10/1/90 2 , 6 E,QBROWN & ROOT 109730 3120 S PRECINCT LINE RD, HURSTGASOLINE, DIESEL 4/11/95 2 , 2A E,Q* BUDGET RENT A CAR111233 3212 E ABRAMS, ARLINGTONUNKNOWN 6/28/96 2 , 2A E,QBUNGE FOODS 101882 400 E EXCHANGE AVE, FORT WORTHDIESEL 12/25/91 2 , 2A E,QBURFORD ESTATE 091587 2601 NE 28TH ST, FORT WORTHGASOLINE 11/18/87 2 , 2A E,Q* BURLY FENCE & HARDWARE INC104609 754 N BURLESON BLVD, BURLESONDIESEL 9/9/92 2 , 5 E,QBUZ POST PONTIAC 097686 1500 W IH-20, ARLINGTONWASTE OIL 12/6/90 2 , 3 E,QCARLISLE PROPERTIES 110998 701 W BERRY, FORT WORTHGASOLINE 5/10/96 2 , 6 E,QCENTURY MACHINE & METAL 102048 5904 EDEN DR, HALTOM CITYGASOLINE 2/15/92 2 , 2A E,QCHAN KANG 111772 3221 N MAIN ST, FORT WORTHGASOLINE 10/11/96 2A , 6 E,QCHEVRON PRODUCTS COMPANY 091234 4533 S BELLAIRE DR, FORT WORTHUNKNOWN 2/23/87 2 , 4 E,QCHEVRON PRODUCTS COMPANY 091438 700 E BERRY, FORT WORTHGASOLINE 8/20/87 2 , 2A E,QCHEVRON PRODUCTS COMPANY 092518 3251 N IH--35, FORT WORTHGASOLINE 1/10/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 092887 2961 W BERRY ST, FORT WORTHGASOLINE 3/29/89 2A , 6 E,QCHEVRON PRODUCTS COMPANY 093740 1440 S BOWEN, ARLINGTONGASOLINE 8/16/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 095845 8522 S HWY 377, BENBROOKGASOLINE 4/27/90 2 , 2A E,QCHEVRON PRODUCTS COMPANY 097265 3017 W 7TH, FORT WORTHGASOLINE 11/16/90 2 , 2A E,QTNRCC - 156

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPSTCHEVRON PRODUCTS COMPANY 097715 1601 PARK ROW, ARLINGTONGASOLINE 1/10/91 2 , 3 E,QCHEVRON PRODUCTS COMPANY 097927 1225 BARDIN RD, ARLINGTONGASOLINE 1/11/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 098393 1512 BROWN TRL, BEDFORDGASOLINE 3/22/91 2 , 2A E,QCHEVRON PRODUCTS COMPANY 103151 6101 E ROSEDALE, FORT WORTHUNKNOWN 5/15/92 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY105801 801 E ALLEN AVE, FORT WORTHGASOLINE 9/11/92 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106054 900 E PIONEER HWY, ARLINGTONGASOLINE 2/5/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106369 911 N COLLINS, ARLINGTONGASOLINE 3/5/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 106738 101 E HWY 114, GRAPEVINEGASOLINE 4/23/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 107484 5711 GREEN OAKS BLVD, ARLINGTONGASOLINE 8/30/93 2 , 2A E,QCHEVRON PRODUCTS COMPANY 108114 1500 PRECINCT LINE RD, HURSTGASOLINE 5/2/94 2 , 2A E,QCHEVRON PRODUCTS COMPANY 109385 8540 N IH-30, WHITE SETTLEMENTGASOLINE 4/14/95 2 , 2A E,QCHEVRON PRODUCTS COMPANY 109578 809 FOREST PARK, FORT WORTHGASOLINE 6/15/94 2A , 6 E,QCHEVRON PRODUCTS COMPANY 109828 3301 POLLY FWY, FORT WORTHGASOLINE 6/16/94 2A , 6 E,QCHEVRON PRODUCTS COMPANY 110496 6600 MEADOWBROOK, FORT WORTHGASOLINE 1/22/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110497 2128 HARWOOD, BEDFORDGASOLINE 1/1/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110524 6350 CAMP BOWIE, FORT WORTHGASOLINE 1/16/96 2 , 6 E,QCHEVRON PRODUCTS COMPANY 110534 4000 W PIONEER PKWY, ARLINGTONGASOLINE 3/1/96 2 , 2A E,QCHEVRON PRODUCTS COMPANY 110569 1014 N INDUSTRIAL, EULESSGASOLINE 1/10/96 2 , 2A E,QCHEVRON USA 110498 15200 HENDERSON, FORT WORTHGASOLINE 1/22/96 2 , 6 E,QCHEVRON USA 110571 6600 N BEACH, FORT WORTHGASOLINE 1/25/96 2A , 6 E,QCHEVRON USA INC 096290 5925 OVERTON RIDGE BLVD, FORT WORTHGASOLINE 7/24/90 2A , 6 E,QCHEVRON USA INC 097205 5400 S HULEN, FORT WORTHGASOLINE 4/3/90 2A , 6 E,QCHEVRON USA PRODUCTS CO 098382 3394 S WATSON RD, ARLINGTONGASOLINE 4/16/91 2A , 6 E,QCHEVRON USA PRODUCTS CO 101000 2961 W BERRY ST, FORT WORTHGASOLINE 11/22/91 2 , 2A E,QCHEVRON USA PRODUCTS CO 104817 4340 LITTLE RD, ARLINGTONGASOLINE 10/2/92 2A , 6 E,QCHRISTON COMPANY 098557 725-827 E PARK ROW DR, ARLINGTONGASOLINE 4/10/91 2 , 2A E,QCIRCLE K CORP 095031 3201 IH-35, FORT WORTHDIESEL 2/12/90 2 , 2A E,QCIRCLE K CORP 107735 1151 E SEMINARY DR, FORT WORTHGASOLINE 11/8/93 2A , 6 E,QCITY OF ARLINGTON 095785 201 W ABRAMS, ARLINGTONGASOLINE, WASTE OIL 5/14/90 2 , 2A E,QCITY OF ARLINGTON 100090 1011 W MAIN, ARLINGTONGASOLINE, DIESEL 8/21/91 2 , 2A E,Q* CITY OF ARLINGTON106196 2801 MATLOCK, ARLINGTONGASOLINE 12/23/92 2 , 2A E,Q* CITY OF ARLINGTON-DEPT ENG SVC109888 2101 WEBB-LYNN RD, ARLINGTONGASOLINE 9/15/95 2 , 2A E,QCITY OF EULESS 097304 117 W EULESS BLVD, EULESSDIESEL 11/20/90 2 , 5 E,Q* CITY OF EULESS112088 1517 WESTPARK WAY, EULESSGASOLINE, DIESEL 1/24/97 1B , 1A E,QCITY OF FORT WORTH 095012 2500 BRENNAN, FORT WORTHGASOLINE 1/18/90 2 , 2A E,QCITY OF FORT WORTH 098875 3409 HARLEY ST, FORT WORTHGASOLINE, WASTE OIL 4/8/91 2A , 6 E,QCITY OF FORT WORTH 099503 2201 W DAGGETT ST, FORT WORTHUNKNOWN 7/10/91 2 , 2A E,QCITY OF FORT WORTH 103643 1013 CHERRY ST, FORT WORTHGASOLINE 5/29/92 2A , 1A E,QCITY OF FORT WORTH 108239 1120 FOURNIER ST, FORT WORTHGASOLINE 6/28/90 2 , 2A E,Q* CITY OF FORT WORTH112543 14650 STATLER, FORT WORTHUNKNOWN 8/18/97 2 , 6 E,QCITY OF LAKE WORTH 110364 6720 TELEPHONE RD, LAKE WORTHGASOLINE 1/16/96 2 , 2A E,QCITY VENDING COMPANY 097469 420 W MAGNOLIA AVE, FORT WORTHGASOLINE, WASTE OIL 11/28/90 2 , 3 E,QCLARKLIFT 105387 5108 AIRPORT FWY, HALTOM CITYGASOLINE 10/1/92 1B , 1A E,QCONCOLIDATED C STORES INC 108226 4940 DAVIS BLVD, NORTH RICHLAND HILLSGASOLINE 4/19/94 2 , 2A E,QCONOCO INC 093559 2025 CHERRY LN, WHITE SETTLEMENTGASOLINE 8/29/89 2 , 2A E,QCONOCO INC 096439 5530 S JAMES AVE, FORT WORTHGASOLINE 8/9/90 2 , 6 E,QCONOCO INC 098010 8401 BEDFORD EULESS RD, NEW RICHLAND HILLS GASOLINE 2/11/91 2 , 6 E,QCONOCO INC 098504 1510 S UNIVERSITY, FORT WORTHGASOLINE 11/21/89 2 , 4 E,QTNRCC - 157

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPSTCONOCO INC 106598 6101 S HULEN, FORT WORTHGASOLINE 4/6/93 2 , 2A E,QCONOCO, INC. 106597 814 E PARK ROW, ARLINGTONGASOLINE 4/9/93 2 , 4 E,QDALWORTH/PRIDE OF TEXAS DIST. 099919 2505 W PIONEER PKWY, PANTEGOGASOLINE 9/19/91 2 , 2A E,QDAVE GETTY 091842 800 W HURST BLVD, HURSTGASOLINE 4/26/88 2 , 3 E,QDEE & DEE OIL CO 092179 1901 PARK ROW, ARLINGTONGASOLINE 9/15/88 2 , 2A E,QDFW INTERNATIONAL AIRPORT AUTH 111410 2413 N SUPPORT RD, DFW AIRPORTHYDR FLUID 5/30/96 1B , 1A E,Q* DFW TOYOTA112246 625 NE LOOP 820, HURSTOTHER 4/8/97 1B , 1A E,Q* DIAMOND SHAMROCK111425 1300 S COOPER, ARLINGTONGASOLINE 7/18/96 1B , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 091209 1233 PRECINCT LINE RD, HURSTGASOLINE 1/13/87 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091252 3515 E DIVISION, ARLINGTONGASOLINE 4/1/84 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091276 3001 ALTA MERE RD, FORT WORTHGASOLINE 4/7/87 2A , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091332 300 E SEMINARY DR, FORT WORTHGASOLINE 5/1/86 2A , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091658 1800 MONTGOMERY ST, FORT WORTHGASOLINE 2/9/88 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 092613 8601 BOAT CLUB RD, FORT WORTHGASOLINE 1/1/89 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 092690 3200 E PARK ROW BLVD, ARLINGTONGASOLINE 1/1/89 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 093395 901 E ARKANSAS, ARLINGTONGASOLINE 7/24/89 2 , 4 E,QDIAMOND SHAMROCK REF & MKTG CO 095429 3233 CLEBURNE RD, FORT WORTHGASOLINE 4/12/90 2A , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 096037 2525 BROWN BLVD, ARLINGTONGASOLINE 8/24/89 2A , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 096449 6700 CROWLEY RD, FORT WORTHGASOLINE 10/20/89 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 098117 2400 E ROSEDALE ST, FORT WORTHGASOLINE 2/15/90 2A , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 099903 3410 DECATUR AVE, FORT WORTHGASOLINE 8/7/91 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 100356 2517 E PARK ROW, ARLINGTONGASOLINE 1/17/91 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 103681 419 W RANDOL MILL, ARLINGTONGASOLINE 6/17/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 108362 6621 N BEACH, FORT WORTHGASOLINE 6/14/94 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO108822 4619 RIVER OAKS BLVD, FORT WORTHGASOLINE 7/15/94 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109062 1251 WOODHAVEN DR, FORT WORTHGASOLINE 1/18/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109119 2005 W SANFORD, ARLINGTONGASOLINE 1/25/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 109221 6617 JACKSBORO HWY, FORT WORTHGASOLINE 12/28/94 2A , 1A E,QDIAMOND SHAMROCK REF & MKTG CO 109454 1508 S BOWEN, ARLINGTONGASOLINE 5/5/95 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 111209 1901 NW 28TH ST, FORT WORTHGASOLINE 6/12/96 2 , 2A E,Q* DONALD LOOKADOO100044 905 MEYERS RD, GRAND PRAIRIEUNKNOWN 10/1/97 2A , 1A E,Q* DOUG EMERY112260 401 N KIMBALL RD, SOUTHLAKEGASOLINE 4/21/97 1B , 1A E,QDR BRANHAM GARTH 109392 5041 DAVIS BLVD, NORTH RICHLAND HILLSGASOLINE 4/11/95 2 , 2A E,Q* E Z MART STORES INC112819 600 N INDUSTRIAL, EULESSUNKNOWN 12/9/97 1B , 1A E,QE Z SERVE INC 111699 844 PIPELINE RD, HURSTGASOLINE 9/20/96 2 , 2A E,QE Z SERVE INC 111759 229 E MAIN, CROWLEYGASOLINE 9/24/96 2 , 2A E,QE Z SERVE INC 111761 12201 RENDON RD, BURLESONGASOLINE 9/24/96 2 , 2A E,QE Z SERVE PETROLEUM MARKETING 104344 2790 S 2ND AVE, MANSFIELDGASOLINE 8/19/92 2 , 2A E,QE-Z MART STORE, INC. 102995 5112 S COOPER, ARLINGTONGASOLINE 5/5/92 2 , 2A E,QEAGLE MOUNTAIN SAGINAW ISD 093352 1200 OLD DECATUR RD, FORT WORTHGASOLINE, DIESEL 7/12/89 2A , 6 E,QEASTWOOD W. H. 092873 804 N SYLVANIA, FORT WORTHGASOLINE 3/30/89 2A , 1A E,QELTON HYDER JR 101274 901 E ABRAMS, ARLINGTONGASOLINE, WASTE OIL 12/18/91 2 , 2A E,QETNA INVESMENT GROUP 108085 100 AFFILIATED DR, KELLERDIESEL 4/22/94 1B , 1A E,QEXXON COMPANY USA 091229 6601 BRENTWOOD STAIR, FORT WORTHUNKNOWN 1/29/87 2 , 2A E,QEXXON COMPANY USA 091382 8601 IH--30, FORT WORTHGASOLINE 7/6/87 2 , 4 E,QEXXON COMPANY USA 091688 2524 E PARK ROW DR, ARLINGTONGASOLINE 5/19/86 2 , 2A E,QEXXON COMPANY USA 092063 6001 CAMP BOWIE BLVD, FORT WORTHGASOLINE 7/27/88 2 , 4 E,QEXXON COMPANY USA 092193 7900 SOUTH FWY, FORT WORTHGASOLINE 9/21/88 2 , 6 E,QTNRCC - 158

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPSTEXXON COMPANY USA 093094 801 E SEMINARY DR, FORT WORTHUNKNOWN 4/27/89 2 , 2A E,QEXXON COMPANY USA 093105 3849 ALTA MESA, FORT WORTHGASOLINE 5/18/89 2 , 3 E,QEXXON COMPANY USA 095032 5728 E BERRY ST, FORT WORTHGASOLINE 2/3/90 2A , 6 E,QEXXON COMPANY USA 096144 936 N COLLINS, ARLINGTONGASOLINE 5/2/90 2 , 6 E,QEXXON COMPANY USA 097128 6100 HULEN ST, FORT WORTHGASOLINE 11/2/90 2 , 6 E,QEXXON COMPANY USA 098747 3113 S HULEN ST, FORT WORTHGASOLINE 2/25/88 2 , 6 E,QEXXON COMPANY USA 098805 2500 W PARK ROW DR, PANTEGOGASOLINE 2/28/91 2A , 6 E,QEXXON COMPANY USA 099359 8701 SOUTH FWY, FORT WORTHGASOLINE 5/29/91 2 , 6 E,QEXXON COMPANY USA 103631 2424 W PIONEER PKWY, PANTEGOGASOLINE 1/31/90 2 , 2A E,Q* EXXON COMPANY USA107565 620 E BERRY, FORT WORTHGASOLINE 3/13/92 2 , 2A E,QEXXON COMPANY USA 108858 6634 GRAPEVINE HWY, NORTH RICHLAND HILLS GASOLINE 12/17/91 2 , 6 E,QEXXON COMPANY USA 110317 6004 S COOPER, ARLINGTONGASOLINE 11/28/95 2 , 2A E,QEXXON COMPANY USA 110684 1606 W RANDOL MILL, ARLINGTONGASOLINE, DIESEL 3/19/96 2 , 2A E,Q* EXXON COMPANY USA111067 1498 PRECINCT LINE RD, HURSTGASOLINE 5/22/96 1B , 1A E,Q* EXXON COMPANY USA111078 100 S INDUSTRIAL, EULESSGASOLINE 5/23/96 1B , 1A E,Q* EXXON COMPANY USA111136 3300 DENTON HWY, FORT WORTHGASOLINE 5/30/96 1B , 1A E,QFDIC 096695 4320 SE LOOP 820 S, FORT WORTHGASOLINE, WASTE OIL 8/31/90 2 , 2A E,QFDIC 097658 3200 S COOPER ST, ARLINGTONGASOLINE 12/6/90 2 , 2A E,QFFP OPERATING PARTNERS 103644 5800 E BERRY, FORT WORTHGASOLINE 5/28/92 2A , 1A E,QFINA OIL & CHEMICAL CO 091281 501 RANDOL MILL RD, ARLINGTONGASOLINE 3/30/87 2 , 2A E,QFINA OIL & CHEMICAL CO 091561 1731 E DIVISION, ARLINGTONGASOLINE 11/5/87 2 , 3 E,QFINA OIL & CHEMICAL CO 091648 HWY 377, WATAUGAGASOLINE 2/1/88 2A , 6 E,QFINA OIL & CHEMICAL CO 091972 5617 MCCART AVE, FORT WORTHGASOLINE 6/16/88 2 , 2A E,QFINA OIL & CHEMICAL CO 092084 831 E PIONEER PKWY, ARLINGTONGASOLINE 6/1/87 2 , 2A E,QFINA OIL & CHEMICAL CO 092170 2109 W DIVISION, ARLINGTONGASOLINE 9/22/88 2 , 2A E,QFINA OIL & CHEMICAL CO 092208 3501 HARWOOD RD, BEDFORDGASOLINE 10/10/87 2 , 4 E,QFINA OIL & CHEMICAL CO 093993 414 N UNIVERSITY, FORT WORTHGASOLINE 10/9/89 2 , 2A E,QFINA OIL & CHEMICAL CO 094007 5300 BRENTWOOD STAIR RD, FORT WORTHGASOLINE 10/26/89 2 , 2A E,QFINA OIL & CHEMICAL CO 094747 600 N COLLINS ST, ARLINGTONGASOLINE 11/20/89 2 , 2A E,QFINA OIL & CHEMICAL CO 098411 4001 S MATLOCK, ARLINGTONGASOLINE 3/23/91 2 , 2A E,QFINA OIL & CHEMICAL CO 098549 417 W EULESS BLVD, EULESSGASOLINE 4/6/91 2 , 2A E,QFINA OIL & CHEMICAL CO 101985 1661 PRECINCT LINE RD, HURSTGASOLINE 10/28/91 2 , 2A E,QFINA OIL & CHEMICAL CO 103409 1400 WILLAM D TATE AVE, GRAPEVINEGASOLINE 6/10/92 2 , 2A E,QFINA OIL & CHEMICAL CO 108373 5636 MALVEY AVE, FORT WORTHGASOLINE 5/5/94 2 , 6 E,QFINA OIL & CHEMICAL CO 108883 3001 EULESS BLVD, EULESSGASOLINE 10/31/94 2 , 2A E,QFINA OIL AND CHEMICAL COMPANY 108768 4500 E LANCASTER, FORT WORTHDIESEL 10/27/94 2 , 2A E,QFIRST SAVINGS BANK 107281 205 BEDFORD RD, BEDFORDGASOLINE 9/23/93 2 , 2A E,QFORT WORTH ISD 091516 6300 WICHITA, FORT WORTHGASOLINE, DIESEL 11/3/87 2A , 6 E,QFORT WORTH ISD 093944 2808 TILLAR ST, FORT WORTHGASOLINE 10/23/89 2A , 6 E,QFORT WORTH ISD 094518 215 NE 14TH ST, FORT WORTHGASOLINE 1/8/90 2 , 2A E,Q* FORT WORTH MEDICAL PLAZA INC103610 1401 S MAIN ST, FORT WORTHDIESEL 6/26/92 2 , 2A E,QFOX RENTAL CO 100929 4015 HWY 157, EULESSDIESEL 11/19/91 2 , 6 E,QFREEMAN PONTIAC MAZDA 098307 701 NE LOOP 820, HURSTGASOLINE, WASTE OIL 3/20/91 2 , 4 E,QGENE HARRIS PETROLEUM 091322 101 N FOREST HILL DR, EVERMANUNKNOWN 5/23/87 2 , 2A E,QGENICO DISTRIBUTORS INC 103488 2205 W AIRPORT FWY, EULESSGASOLINE 6/15/92 2 , 2A E,QGOOD LUCK OIL CO 097008 311 NORTHSIDE DR, FORT WORTHGASOLINE 10/16/90 2A , 2A E,QGTE SOUTHWEST INC 107371 HWY 114, GRAPEVINEDIESEL 10/26/93 2 , 2A E,QGULF REALTY INC 111915 1400 S COLLINS, ARLINGTONGASOLINE 9/19/96 2 , 2A E,QTNRCC - 159

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPSTHALDER TRUCKING 104181 1201 E MANSFIELD HWY, FORT WORTHDIESEL 8/12/92 2 , 6 E,QHAROLD & CARMEN SPARKS 107726 1000 JONES ST, FORT WORTHDIESEL 12/6/90 2A , 1A E,QHARRIS OIL COMPANY 094993 100 FOREST HILL DR, EVERMANGASOLINE 8/14/89 2 , 2A E,QHARRISON REAL ESTATE 092029 3525 ALTA MERE, FORT WORTHGASOLINE 7/15/86 2A , 6 E,QHAYES LEASING CO INC 091282 NORTH FACILITY, DFW AIRPORTGASOLINE 3/26/87 2 , 2A E,QHOLLAND OIL COMPANY 094746 2525 NE 28TH, FORT WORTHDIESEL 12/22/89 2 , 2A E,QINTERSTATE BRANDS CORP 111514 836 W PIPELINE RD, HURSTDIESEL 8/12/96 2 , 6 E,Q* J M C OIL CO111528 501 N SAGINAW BLVD, SAGINAWGASOLINE 6/28/96 2 , 2A E,QJ-MC OIL CO 101004 901 N COOPER ST, ARLINGTONGASOLINE 11/26/91 2 , 2A E,QJ.C. DUNCAN CO. 101649 1212 HARRISON ST, ARLINGTONGASOLINE, DIESEL, WASTE OIL 7/23/91 2 , 2A E,QJACK TYLER 111272 3017 MORTON, FORT WORTHGASOLINE 6/24/96 2A , 6 E,Q* JAMES DUBOSE112544 2400 WEST FWY, FORT WORTHUNKNOWN 8/21/97 2 , 6 E,QJEAN RIDER 091686 101 SOUTHEAST PKWY, AZLEGASOLINE 2/19/88 5B , 2A E,QJERRY EMMONS 098975 316 N MAIN ST, EULESSGASOLINE 5/14/91 5B , 2A E,QJMC OIL CO 103876 3280 W SOUTHLAKE BLVD, SOUTHLAKEGASOLINE 7/15/92 2 , 2A E,QJOHN T KING INVESTMENTS 092745 201 N CENTER ST, ARLINGTONGASOLINE 3/8/89 2 , 6 E,QJOSEPH GLIDEWELL 091187 250 S MAIN, KELLERGASOLINE 11/18/86 2 , 6 E,QKEITH BERTELSON 111293 HWY 26, RICHLAND HILLSGASOLINE 6/7/96 2 , 6 E,QKEVIN KHORRAMI 108887 3402 AZLE AVE, FORT WORTHGASOLINE 12/2/94 2 , 4 E,Q* KWIK CAR WASH111303 1819 E PARK ROW, ARLINGTONUNKNOWN 7/11/96 2 , 2A E,QL S I 103326 214 HEMPHILL, FORT WORTHGASOLINE 6/1/92 1B , 1A E,QLAKE COUNTRY MARINA J V 110276 9290 HERRING RD, FORT WORTHGASOLINE 12/15/95 2 , 2A E,Q* LLEWELLYN JACK101305 3324 E BELKNAP, FORT WORTHUNKNOWN 12/17/91 2A , 1A E,QLOFLAND CORP 096046 2400 NE 36TH ST, FORT WORTHGASOLINE, DIESEL 4/19/90 2 , 2A E,QLONESTAR ELECTRIC COMPANY 094291 2008 W 5TH ST, FORT WORTHGASOLINE 11/9/89 2 , 6 E,Q* LOUIS HOWARD106492 2206 W EULESS BLVD, EULESSGASOLINE 4/14/93 2 , 2A E,QLOUIS MCCRORY 096842 1712 N SYLVANIA, FORT WORTHGASOLINE 9/10/90 2 , 6 E,QLSI SERVICES CO 109676 2400 MONTGOMERY, FORT WORTHGASOLINE 4/28/95 1B , 1A E,QLSI SERVICES CO 109705 6217 E LANCASTER, FORT WORTHGASOLINE 6/11/95 2 , 2A E,QLSI SERVICES CO 109709 500 N LAS VEGAS TRL, WHITE SETTLEMENTGASOLINE 5/3/95 1B , 1A E,QLUCKY LADY OIL CO 103193 116 BEDFORD EULESS RD, HURSTGASOLINE 5/27/92 2A , 1A E,QLUCKY LADY OIL COMPANY 107460 6728 DAVIS BLVD, NORTH RICHLAND HILLSGASOLINE 11/11/93 2 , 2A E,QLYNN SMITH 105303 3812 BELKNAP ST, FORT WORTHGASOLINE 9/28/92 2 , 6 E,Q* LYNN SMITH107506 300 E ROSEDALE ST, FORT WORTHGASOLINE 12/2/93 2A , 1A E,QMANSFIELD ISD 100015 1400 COUNTRY CLUB RD, MANSFIELDHYDR FLUID 8/23/91 2 , 4 E,QMAPCO INC 092766 3451 MANSFIELD HWY, FORT WORTHGASOLINE 12/23/89 2 , 2A E,QMCMAHAN BRUCE 091765 2526 SW LOOP 820, FORT WORTHGASOLINE 3/25/88 2 , 6 E,QMOBIL OIL CORP 091388 1920 N COLLINS, ARLINGTONGASOLINE 7/13/87 2 , 6 E,QMOBIL OIL CORP 092068 400 GRAPEVINE HWY, COLLEYVILLEGASOLINE 7/18/88 2 , 2A E,QMOBIL OIL CORP 092659 1600 W PIONEER RD, ARLINGTONGASOLINE 10/21/88 2 , 5 E,QMOBIL OIL CORP 093866 3044 HEMPHILL ST, FORT WORTHGASOLINE 4/1/86 2A , 6 E,QMOBIL OIL CORP 093891 3600 N SYLVANIA AVE, FORT WORTHGASOLINE 5/5/89 2 , 6 E,QMOBIL OIL CORP 097651 2829 BROWN TRL, BEDFORDGASOLINE 6/15/86 2A , 6 E,QMOBIL OIL CORP 100097 3800 S COOPER, ARLINGTONGASOLINE 8/30/91 2 , 6 E,QMOBIL OIL CORP 101058 6300 CAMP BOWIE, FORT WORTHGASOLINE 7/16/91 2 , 2A E,QMOBIL OIL CORP 101879 6000 SOUTHWEST BLVD, BENBROOKGASOLINE 7/16/91 2 , 6 E,QMOBIL OIL CORP 102477 4380 GREEN OAKS, ARLINGTONGASOLINE, WASTE OIL 3/26/92 2 , 2A E,QMOBIL OIL CORP 103977 2590 E ARKANSAS LN, ARLINGTONGASOLINE 6/26/92 2 , 4 E,QTNRCC - 160

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPSTMOBIL OIL CORP 106218 2100 AIRPORT FWY, BEDFORDGASOLINE 2/25/93 2A , 1A E,QMOBIL OIL CORP 106669 1200 AIRPORT FWY, BEDFORDGASOLINE 5/19/93 2 , 6 E,QMOBIL OIL CORP 108100 4429 BELLAIRE DR, FORT WORTHGASOLINE 10/14/91 2 , 5 E,QMOHAMMAD TAJ 106803 1101 HEMPHILL, FORT WORTHGASOLINE 5/28/93 2A , 6 E,Q* MORITZ CADILLIC105664 1511 INDUSTRIAL CT, ARLINGTONGASOLINE 10/29/92 2 , 2A E,QMOTHERAL PRINTING COMPANY 100262 510 S MAIN ST, FORT WORTHGASOLINE, CHEMICAL 9/11/91 2 , 2A E,QNATIONAL CONVENIENCE STORES 091237 HWY 114, ROANOKEGASOLINE 10/9/86 5B , 4 E,QNATIONAL CONVENIENCE STORES 101351 6620 BRENTWOOD STAIR RD, FORT WORTHGASOLINE, DIESEL 11/27/91 5B , 1A E,QNATIONAL CONVENIENCE STORES 104126 4400 SOUTHWEST BLVD, FORT WORTHGASOLINE 7/30/92 5B , 1A E,QNATIONAL HEALTHCARE LINEN SER 096698 1340 E BERRY ST, FORT WORTHGASOLINE, DIESEL 9/14/90 2 , 2A E,QNATIONS BANK 098923 1305 E ROSEDALE ST, FORT WORTHGASOLINE, WASTE OIL 4/10/91 2 , 2A E,QNCNB TEXAS 099356 411 S BALLINGER, FORT WORTHGASOLINE, DIESEL, WASTE OIL 6/25/91 2 , 3 E,QNGUYEN TUYEN C. 099171 3301 E BERRY, FORT WORTHGASOLINE 5/28/91 2 , 6 E,QNGUYEN VO 095281 2413 NE 28TH ST, FORT WORTHGASOLINE 4/16/90 2 , 2A E,QNORA LACY 107273 1550 E BROAD, MANSFIELDDIESEL 9/17/93 2 , 2A E,QNORMAN WOLF 110316 4099 DENTON HWY, HALTOM CITYGASOLINE, WASTE OIL 1/22/96 2 , 2A E,QNORTH HILLS REALTY, INC. 100225 3725-29 FLORY ST, NORTH RICHLAND HILLSGASOLINE 9/12/91 2A , 2A E,QODESSA LAND CORPORATION 095389 900 WINSCOTT RD, BENBROOKGASOLINE 2/20/90 2A , 2A E,QOGDEN ALLIED AVIATION SERVICES 106847 W AIRFIELD DR, DFW AIRPORTJET FUEL 6/21/93 2 , 2A E,QPEMCO 109703 1809 S PEYCO DR, ARLINGTONGASOLINE 7/6/95 2 , 6 E,QPEPSI COLA BOTTLING 097512 5281 BLUE MOUND RD, FORT WORTHGASOLINE, DIESEL 7/25/90 2 , 2A E,QPHILLIPS 66 CO 110952 1225 OAKLAND BLVD, FORT WORTHGASOLINE, DIESEL 5/2/96 2 , 6 E,Q* PREMIER INDUSTRIAL CORP112550 3024 E SEMINARY DR, FOREST HILLUNKNOWN 8/22/97 2 , 6 E,Q* PRESTIGE GUNITE INC110705 860 DAVIS BLVD, SOUTHLAKEUNKNOWN 3/29/96 2 , 2A E,QPROFESSIONAL FUELING SYSTEMS 098565 216 E NORTHWEST HWY, GRAPEVINEGASOLINE 1/23/91 2 , 2A E,QPROFICIENT FOOD CO 110049 2116 EXCHANGE DR, ARLINGTONGASOLINE 8/30/95 2 , 2A E,QPRR, INC. 106605 3300 N SYLVANIA AVE, FORT WORTHGASOLINE, DIESEL, WASTE OIL 4/12/93 2 , 2A E,QQUICKWAY GROCERY CO 099001 955 WINSCOTT PLOVER RD, BENBROOKGASOLINE 2/20/91 2 , 2A E,QQUIK SAK STORES INC 091315 9605 HWY 199, LAKESIDEUNKNOWN 6/21/84 2 , 6 E,QQUIK SAK STORES INC 092734 6753 E LANCASTER, FORT WORTHGASOLINE 3/2/89 2 , 2A E,QRACETRAC PETROLEUM INC 101001 6300 E LANCASTER AVE, FORT WORTHGASOLINE 9/30/91 2 , 2A E,QRACETRAC PETROLEUM INC 101379 8535 S HWY 377, BENBROOKGASOLINE 12/18/91 2A , 6 E,QRHINE KENNETH 092213 500 N STEWART ST, AZLEGASOLINE 8/17/88 5B , 2A E,QROLLINS LEASING CORP 099457 3120 E AVE E, ARLINGTONDIESEL 6/10/91 2 , 3 E,QRYDER TRUCK RENTAL INC 092597 1315 RIVERSIDE DR, FORT WORTHDIESEL 2/8/91 2 , 3 E,QRYDER TRUCK RENTAL INC 097442 4712 SOUTH FWY, FORT WORTHDIESEL 11/1/90 2 , 2A E,QSAM QADDURA 093082 3417 HORN ST, FORT WORTHGASOLINE 5/24/89 2A , 1A E,Q* SANDFORD OIL CO112460 1804 E HWY 199, AZLEGASOLINE 6/19/97 2 , 2A E,QSCHULLER INTERNATIONAL INC 094756 2222 W 5TH ST, FORT WORTHGASOLINE 12/11/90 2 , 6 E,QSELLERS BUD 104498 825 N MAIN ST, FORT WORTHGASOLINE, WASTE OIL 9/2/92 2 , 2A E,QSHELL OIL CO 091201 900 E DIVISION ST, ARLINGTONUNKNOWN 12/8/86 2 , 6 E,QSHELL OIL CO 091937 700 W ABRAMS, ARLINGTONGASOLINE 5/27/88 2 , 6 E,QSHELL OIL CO 093698 1513 BROWN TRL, BEDFORDGASOLINE 8/23/89 2 , 6 E,QSHELL OIL CO 109967 6517 BRENTWOOD STAIR RD, FORT WORTHGASOLINE 1/11/90 2 , 6 E,QSIX FLAGS OVER TEXAS 093165 2201 ROAD TO SIX FLAGS, ARLINGTONDIESEL, GASOLINE 5/26/89 2 , 4 E,QSIX FLAGS OVER TEXAS 095120 2201 ROAD TO SIX FLAGS, ARLINGTONGASOLINE 2/14/90 2 , 2A E,QSNAPPY JACKS INC 091451 HWY 287, MANSFIELDDIESEL 8/17/87 2A , 2A E,QSOLUTION WARE INC 111409 3001 E ROSEDALE, FORT WORTHGASOLINE 7/25/96 1B , 1A E,QTNRCC - 161

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPSTSOUTHLAND CORP 091311 2420 MARKET, FORT WORTHUNKNOWN 5/19/87 2A , 6 E,QSOUTHLAND CORP 091329 5700 CALLOWAY, FORT WORTHUNKNOWN 4/16/87 2 , 6 E,QSOUTHLAND CORP 092120 1827 E PARK ROW, ARLINGTONGASOLINE 9/7/88 2 , 6 E,QSOUTHLAND CORP 093287 2823 BROWN TRL, BEDFORDGASOLINE 7/5/89 2 , 2A E,QSOUTHLAND CORP 093687 1622 HEMPHILL, FORT WORTHGASOLINE 8/22/89 2 , 2A E,QSOUTHLAND CORP 094006 2900 BROWN TRL, BEDFORDGASOLINE 10/16/89 2 , 2A E,QSOUTHLAND CORP 095003 6800 OLD CLEBURNE RD, FORT WORTHGASOLINE 2/27/90 2 , 2A E,QSOUTHLAND CORP 097567 5100 BROADWAY, HALTOM CITYGASOLINE 12/17/90 2 , 6 E,QSOUTHLAND CORP 102474 1900 E ABRAMS, ARLINGTONGASOLINE 3/27/92 2 , 6 E,Q* SOUTHLAND CORP103084 703 W DIVISION, ARLINGTONGASOLINE 5/14/92 2 , 2A E,QSOUTHLAND CORP 103469 1016 E BROAD ST, MANSFIELDGASOLINE 12/13/91 2 , 6 E,QSOUTHLAND CORP 104429 5901 DAVIS, NORTH RICHLAND HILLSGASOLINE 8/19/92 2 , 6 E,QSOUTHLAND CORP 108345 2730 S COOPER, ARLINGTONGASOLINE 10/5/93 2 , 6 E,QSOUTHLAND CORP 109162 511 N MAIN, EULESSGASOLINE 12/15/94 2 , 3 E,QSOUTHLAND CORP 110647 1201 W RANDOL MILL, ARLINGTONUNKNOWN 3/20/96 2 , 2A E,QSOUTHLAND CORP 110686 1521 W ARKANSAS, ARLINGTONUNKNOWN 3/28/96 2 , 2A E,Q* SOUTHLAND CORP110701 2801 E PARK ROW, ARLINGTONGASOLINE 3/21/96 2 , 2A E,QSOUTHLAND CORP 110824 2800 NE 28TH ST, FORT WORTHGASOLINE 4/8/96 2 , 6 E,QSOUTHLAND CORP 110855 3200 W 7TH ST, FORT WORTHGASOLINE 4/17/96 2 , 2A E,QSOUTHWEST PROPERTIES 109671 602 FOUNTAIN PKWY, GRAND PRAIRIEGASOLINE 12/9/94 2A , 1A E,QSOUTHWESTERN BELL TELEPHONE CO 102673 312 W ABRAMS AVE, ARLINGTONGASOLINE 4/13/92 2 , 2A E,QSTAFFORD-LOWDON 101629 4000 LUBBOCK AVE, FORT WORTHGASOLINE 1/6/92 2 , 2A E,QSTAR ENTERPRISE 091185 6550 FOREST HILL DR, FOREST HILLGASOLINE 9/1/86 2 , 6 E,QSTAR ENTERPRISE 091671 901 E PARK ROW, ARLINGTONGASOLINE 2/11/88 2 , 4 E,QSTAR ENTERPRISE 095523 6720 S HULEN, FORT WORTHGASOLINE 5/11/90 2A , 6 E,QSTAR ENTERPRISE 096211 4851 SOUTH FWY, FORT WORTHGASOLINE 6/6/90 2A , 6 E,QSTAR ENTERPRISE 097657 6734 JACKSBORO HWY, LAKE WORTHGASOLINE 12/30/90 2A , 6 E,QSTAR ENTERPRISE 098062 1527 S UNIVERSITY, FORT WORTHWASTE OIL 2/21/91 2 , 2A E,QSTAR ENTERPRISE 100091 4401 GREEN OAKS BLVD, ARLINGTONGASOLINE, DIESEL 8/26/91 2 , 2A E,QSTAR ENTERPRISE 100786 3524 S HILLS, FORT WORTHGASOLINE 10/18/91 2A , 6 E,QSTAR ENTERPRISE 100832 4500 S BOWEN RD, ARLINGTONGASOLINE 10/25/91 2 , 6 E,QSTAR ENTERPRISE 101599 1019 N INDUSTRIAL, BEDFORDGASOLINE 1/7/92 2 , 4 E,QSTAR ENTERPRISE 102092 760 W PIPELINE RD, HURSTGASOLINE 3/6/92 2A , 6 E,QSTAR ENTERPRISE 104902 2026 CHERRY LN, WHITE SETTLEMENTWASTE OIL 8/29/89 2 , 6 E,Q* STAR ENTERPRISE107889 8541 IH--30, FORT WORTHGASOLINE 3/24/93 2 , 2A E,QSTAR ENTERPRISE 108913 6705 MEADOWBROOK, FORT WORTHGASOLINE 8/3/94 2 , 6 E,QSTAR ENTERPRISE 110079 8522 W HWY 80, FORT WORTHGASOLINE 10/30/95 2A , 6 E,QSTAR ENTERPRISE 110757 1595 E BROAD, MANSFIELDGASOLINE 3/29/96 2 , 2A E,Q* STAR ENTERPRISE112330 3070 S UNIVERSITY, FORT WORTHGASOLINE 5/15/97 1B , 1A E,Q* STAR ENTERPRISE112690 900 N WATSON, ARLINGTONGASOLINE 10/1/97 1B , 1A E,QSWITZER PETROLEUM 111782 6551 WATAUGA RD, WATAUGAGASOLINE 10/5/96 2 , 2A E,QSWITZER PETROLEUM PRODUCTS INC 111661 5520 E LANCASTER, FORT WORTHGASOLINE, DIESEL 8/28/96 2 , 2A E,QSWITZER PETROLEUM PRODUCTS INC 111662 2362 E NORTHWEST HWY, SOUTHLAKEGASOLINE 8/22/96 1B , 1A E,QSWITZER PETROLEUM PRODUCTS INC 111735 7375 EDERVILLE RD, FORT WORTHGASOLINE 8/9/96 2A , 1A E,QSWITZER PETROLEUM PRODUCTS INC 111736 2200 E ROSEDALE, FORT WORTHGASOLINE 8/9/96 2A , 1A E,QTANDY CORP 092405 401 NE 38TH ST, FORT WORTHCHEMICAL 10/31/88 2 , 2A E,QTARRANT COUNTY 093130 601 LONGHORN RD, FORT WORTHDIESEL 5/31/89 2A , 6 E,Q* TARRANT CTY TRANSPORTATION DEP109969 901 EVANS AVE, FORT WORTHGASOLINE 10/19/95 2 , 2A E,QTNRCC - 162

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TARRANTPSTTAYLORENF/WSTTERRY MCDONNELL 105531 800 S CHERRY LN, WHITE SETTLEMENTGASOLINE 11/30/92 2 , 6 E,Q* TEXACO REFINING & MARKETING092595 2221 E BERRY, FORT WORTHGASOLINE 12/21/88 2 , 2A E,QTEXAS INDUSTRIES INC 094160 9200 KEMP RD, FORT WORTHDIESEL, GASOLINE 12/7/89 2A , 6 E,Q* TEXAS INDUSTRIES INC110999 3601 LAWNWOOD, FORT WORTHUNKNOWN 5/16/96 2 , 2A E,QTMT INC 096101 1901 E ARKANSAS, ARLINGTONGASOLINE 6/22/90 2 , 2A E,QTMT INC 107241 3400 S WATSON, ARLINGTONGASOLINE 7/26/93 2 , 2A E,Q* TOM ADAMS112128 2300 MONTGOMERY ST, FORT WORTHGASOLINE, DIESEL 2/7/97 2A , 6 E,QTOTAL PETROLEUM INC 093085 2432 W DIVISION, ARLINGTONGASOLINE 5/23/89 2 , 4 E,QTOTAL PETROLEUM INC 099388 1800 S COOPER ST, ARLINGTONGASOLINE 6/27/91 2 , 2A E,QTOTAL PETROLEUM INC 104856 5324 E LANCASTER, FORT WORTHGASOLINE 10/5/92 2 , 6 E,QTOTAL PETROLEUM INC 111202 2700 ABRAMS, ARLINGTONGASOLINE 6/11/96 2 , 6 E,Q* TOWN & COUNTRY112604 1141 W DIVISION, ARLINGTONGASOLINE 6/5/97 1B , 1A E,Q* TOWN & COUNTRY112655 1207 N HWY 157, MANSFIELDGASOLINE 5/30/97 1B , 1A E,QTRI COUNTY ELECTRIC COOP 096288 525 E PRICE ST, KELLERGASOLINE 7/18/90 2A , 6 E,QTRINITY PARK II JOINT VENTURE 110374 1030 STAYTON ST, FORT WORTHDIESEL 1/10/96 2 , 2A E,QTRINITY PRK CTR. 110549 1301 FOCH, FORT WORTHGASOLINE 1/18/96 2A , 6 E,QTRIPLE A OIL COMPANY 097427 1700 PRECINCT RD, HURSTGASOLINE 11/27/90 2 , 2A E,QTU ELECTRIC 106428 2118 S BOWEN, PANTEGOGASOLINE, DIESEL 3/16/93 2 , 6 E,QTXDOT 091191 3600 N BEACH, HALTOM CITYGASOLINE 12/17/86 2A , 1A E,Q* TXDOT096219 804 E WAGGOMAN, FORT WORTHGASOLINE 7/13/90 2 , 2A E,QTXDOT 101613 5501 MCCART, FORT WORTHGASOLINE, DIESEL 12/13/91 2 , 6 E,QTXDOT 101702 GRANT LN, WHITE SETTLEMENTGASOLINE 11/18/91 2 , 6 E,QTXDOT 105891 6948 DENTON HWY, WATAUGAGASOLINE 1/14/93 2 , 5 E,Q* TXDOT112064 403 N MAIN ST, KELLERUNKNOWN 1/17/97 2 , 6 E,QU HAUL CO OF DALLAS 096667 7047 GRAPEVINE HWY, NORTH RICHLAND HILLS GASOLINE 4/17/90 2A , 1A E,QULTRAMAR INC 091159 IH-20, FORNEYGASOLINE 5/16/86 5B , 2A E,QUNIVERSITY TEXAS AT ARLINGTON 095266 W 3RD, ARLINGTONDIESEL 3/27/90 2 , 5 E,QUNKNOWN 091442 GTE MANHOLE, AZLEGASOLINE 8/27/87 5B , 2A E,Q YUNKNOWN 091749 N SYLVANIA, FORT WORTHGASOLINE 2/1/87 5B , 6 E,QUNKNOWN 097640 2056 HWY 157, MANSFIELDUNKNOWN 12/7/90 2 , 2A E,QUNKNOWN 098341 2501 N AYERS, FORT WORTHUNKNOWN 3/7/91 2A , 1A E,QUNKNOWN 098752 5600 DAVIS BLVD, NORTH RICHLAND HILLSGASOLINE 4/25/91 1B , 1A E,QUNKNOWN 105999 E RANDOL MILL, ARLINGTONGASOLINE 1/20/93 2 , 6 E,QUNKNOWN 106377 3000 SHOTTS ST, FORT WORTHGASOLINE 3/5/93 1B , 1A E,Q* UNKNOWN112433 1700 BLK LAMAR, ARLINGTONUNKNOWN 6/30/97 1B , 1A E,QUS AIR FORCE CARSWELL 095220 BLDG 4154, FORT WORTHJET FUEL 3/6/90 2 , 2A E,QUS AIR FORCE CARSWELL 104524 BLDG 1518, FORT WORTHGASOLINE 9/2/92 2 , 5 E,QUS AIR FORCE CARSWELL 104819 BLDG 1170, FORT WORTHJET FUEL 10/2/92 2 , 3 E,QVANDERGRIFF CHEVROLET 094748 901 E DIVISION, ARLINGTONGASOLINE 1/9/90 5B , 2A E,QWALMART INC 099124 1409 CHERRY LN, WHITE SETTLEMENTGASOLINE 5/29/91 2 , 4 E,QWES TEX SERVICE STATIONS LTD 110363 6107 S COOPER ST, ARLINGTONGASOLINE 1/31/96 1B , 1A E,QWORKING MANS FRIEND OIL CO 109721 1801 E LOOP 820, FORT WORTHGASOLINE 6/28/95 2A , 1A E,QDOWELL SCHLUMBERGER - ABILENE 33588 102 MARKET STREET, TYEHYDROCARBONS,CHLORINATEDORGANICS,TPH,V11/7/88 3B , 2A EQV23* US AIR FORCE - DYESS AFB64003 96CSG/DEEV DYESS AFB, ABILENEORGANICS 2/11/88 3A , 2A EQV23TNRCC - 163

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TAYLORFODIHWPCD/CAPSTFINA OIL AND GAS COMPANY 8 MILES WEST OF TYE ON SOUTH SIDE OF HWY 20 BENZENE, TOLUENE, XYLENE 2/4/88 2D , 2B E,Q,V,2,3DYESS AIR FORCE BASE 64003 96 CSG/DEEV, DYESS AFB, ABILENEORGANICS 2/11/88 3A , 3,4,5 E,Q,V,3DYESS AIR FORCE BASE 64003 96 CSG/DEEV, DYESS AFB, ABILENEORGANICS 2/11/88 3A , 3,4,5 E,Q,V,3ACCO FEEDS INC 095538 774 CHINA ST, ABILENEDIESEL 5/2/90 2 , 2A E,QAFCO 092131 2450 S 14TH ST, ABILENEGASOLINE 8/29/88 2 , 6 E,QALLSUP PETROLEUM 093107 4002 RIDGEMONT DR, ABILENEGASOLINE 6/2/89 2 , 2A E,Q* ALLSUP PETROLEUM097899 1741 HWY 351, ABILENEDIESEL 1/7/91 2 , 2A E,Q* ALLSUP PETROLEUM, INC.103338 2702 AMBLER, ABILENEGASOLINE 2/20/92 2 , 2A E,QALLSUPS PETROLEUM 111613 2334 S 14TH ST, ABILENEGASOLINE 3/22/96 2 , 2A E,QALLSUPS PETROLEUM 111614 102 N PIONEER ST, ABILENEGASOLINE 3/21/96 2 , 2A E,QALLSUPS PETROLEUM 111616 800 N GRAPE ST, ABILENEGASOLINE 3/21/96 2 , 2A E,QALLSUPS PETROLEUM 111618 IH 20, ABILENEGASOLINE 3/24/96 2 , 2A E,QALLSUPS PETROLEUM 111619 2401 S 1ST ST, ABILENEGASOLINE 3/20/96 2 , 2A E,QALLSUPS PETROLEUM 111620 4600 N PINE ST, ABILENEGASOLINE 3/28/96 2 , 2A E,QALLSUPS PETROLEUM 111621 IH 20, ABILENEGASOLINE 3/25/96 2 , 2A E,QALLSUPS PETROLEUM 111763 1901 S 1ST, ABILENEGASOLINE 3/21/96 2 , 2A E,QALLSUPS PETROLEUM INC 111355 1049 S TREADAWAY, ABILENEUNKNOWN 7/15/96 2A , 6 E,QAUTO FUEL CO INC 092097 641 S TREADAWAY, ABILENEGASOLINE, DIESEL 8/16/88 2 , 2A E,QAUTO FUEL CO INC 097903 3301 S 1ST ST, ABILENEGASOLINE 1/22/91 2 , 2A E,QAUTO FUEL COMPANY, INC. 092243 3303 S 14TH ST, ABILENEGASOLINE 9/20/88 2A , 6 E,QB J SERVICES 104384 1700 E HWY 351, ABILENEGASOLINE 8/12/92 2 , 6 E,QBANDAG INC R & D CENTER 096116 FM 18, ABILENEDIESEL 7/10/90 2 , 4 E,QBIG THREE INDUSTRIES INC 093645 3132 E HWY 80, ABILENEGASOLINE 9/8/89 2 , 6 E,QBILL BURNS OIL CO 111492 IH 20, MERKELGASOLINE 8/6/96 2 , 2A E,QBOB J SUROVIK 109146 2749 S 1ST ST, ABILENEGASOLINE 9/26/94 2A , 6 E,QBOB LOYD GAS CO 108702 1702 CAMPUS CT, ABILENEGASOLINE, WASTE OIL 6/21/94 2 , 2A E,QBOB LOYD L P GAS CO 092430 3102 14TH, ABILENEGASOLINE 12/8/88 2 , 2A E,QBOB LOYD L P GAS CO 097238 1941 S TREADAWAY, ABILENEGASOLINE, DIESEL, WASTE OIL 10/12/90 5B , 1A E,QBONNET RESOURCES CORP 097868 1300 S CLACK ST, ABILENEGASOLINE, DIESEL 1/22/91 2A , 6 E,QBONNET RESOURCES CORP 098066 IH--20, ABILENEGASOLINE, DIESEL 2/1/91 2A , 1A E,QBOURLAND SERVICE 098891 3050 N 10TH ST, ABILENEGASOLINE 5/9/91 2A , 6 E,QCIRCLE K STORES INC 110897 3131 S DANVILLE, ABILENEGASOLINE 4/11/96 2 , 2A E,Q* CIRCLE K STORES INC111503 1757 INDUSTRIAL BLVD, ABILENEGASOLINE, DIESEL 8/14/96 2 , 2A E,QCITY OF ABILENE 094206 898 SANDY, ABILENEGASOLINE 12/5/89 2 , 2A E,Q* CLAXTON O L101512 RR 1, BRADSHAWGASOLINE 1/10/92 5B , 1A E,QCONTRACT TRUCKING & MATERIALS 108703 753 SCOTT ST, TYEGASOLINE, DIESEL 2/15/94 2A , 6 E,QDOT\FAA 093541 ABILENE MUNICIPAL, ABILENEJET FUEL 8/21/89 2 , 3 E,QDOWELL SCHLUMBERGER INC 094073 102 MARKET ST, TYEGASOLINE 10/30/89 2 , 2A E,QELMWOOD MEMORIAL PARK 094787 S HWY 277, ABILENEGASOLINE 1/24/90 2 , 2A E,QEXXON COMPANY USA 093433 4202 BUFFALO GAP, ABILENEGASOLINE 6/23/89 2 , 6 E,QEXXON COMPANY USA 093477 4850 S 14TH ST, ABILENEGASOLINE 5/31/89 2A , 6 E,QFINA OIL 111750 4840 N 10TH, ABILENEGASOLINE 9/26/96 2 , 2A E,QFINA OIL & CHEMICAL CO 093967 1201 N MOCKINGBIRD, ABILENEGASOLINE 9/19/89 2A , 6 E,QFINA OIL & CHEMICAL CO 093992 2801 AMBLER, ABILENEGASOLINE 1/20/89 2A , 6 E,QTNRCC - 164

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TAYLORPSTFINA OIL & CHEMICAL CO 094397 IH-20, MERKELGASOLINE 11/29/89 2 , 6 E,Q* FINA OIL & CHEMICAL CO094709 1366 MARSHALL, ABILENEGASOLINE 1/9/90 2 , 2A E,QFINA OIL & CHEMICAL CO 095750 128 E IH--20, ABILENEGASOLINE, DIESEL 6/4/90 2 , 6 E,QFINA OIL & CHEMICAL CO 096067 3630 N 6TH ST, ABILENEGASOLINE 9/27/89 2 , 2A E,QFINA OIL & CHEMICAL CO 099697 701 N TREADAWAY, ABILENEGASOLINE, DIESEL 7/23/91 2 , 5 E,QFINA OIL & CHEMICAL CO 100081 2609 S 1ST, ABILENEGASOLINE, DIESEL, WASTE OIL 8/28/91 2 , 4 E,QFINA OIL & CHEMICAL CO 101088 302 BUTTERNUT, ABILENEGASOLINE 4/15/92 2 , 2A E,QFINA OIL & CHEMICAL CO 107662 1801 GRAPE ST, ABILENEUNKNOWN 1/7/94 2 , 2A E,QFINA OIL & CHEMICAL CO 108244 965 E 11TH S ST, ABILENEGASOLINE 4/20/93 2 , 2A E,QFINA OIL AND CHEMICAL COMPANY 102495 3009 S 14TH ST, ABILENEWASTE OIL 12/13/91 1B , 1A E,QFINA OIL AND CHEMICAL COMPANY 102528 3009 S 14TH ST, ABILENEWASTE OIL 10/10/91 1B , 1A E,QGAS-N-GO, INC 092905 270 S PIONEER, ABILENEGASOLINE 3/28/89 2 , 2A E,QGERLACH OIL CO 098782 3299 S 14TH ST, ABILENEGASOLINE 4/29/91 2 , 2A E,QGERLACH OIL CO 109287 HWY 83, LAWNDIESEL 3/21/95 2 , 2A E,Q* GERLACH OIL CO111936 642 S TREADAWAY, ABILENEGASOLINE 11/14/96 2A , 1A E,Q* GERLACH OIL CO112037 1402 S 14TH ST, ABILENEGASOLINE 12/9/96 2 , 2A E,Q* GERLACH OIL CO112201 5333 N 3RD ST, ABILENEGASOLINE 3/20/97 2 , 2A E,QGERLACH OIL COMPANY 110457 1109 S TREADAWAY, ABILENEGASOLINE 2/27/96 2 , 3 E,Q* GERLACH OIL INC111887 3382 N 10TH ST, ABILENEGASOLINE 11/5/96 2 , 2A E,QGOODYEAR TIRE & RUBBER 108106 633 N PINE, ABILENEGASOLINE, WASTE OIL 12/20/93 2 , 2A E,QHALEY DONALD 095600 4507 PINE ST, ABILENEDIESEL 5/15/90 2A , 1A E,QHARDIN SIMMONS UNIVERSITY 096527 2200 HICKORY, ABILENEGASOLINE 7/26/90 2 , 4 E,QHERTZ CORP 096615 AIRPORT RD, ABILENEGASOLINE 7/31/90 2 , 2A E,QLO HI GAS COMPANY 095548 3425 AMBLER, ABILENEGASOLINE 5/7/90 2 , 2A E,QMERCHANTS FAST MOTOR LINES 111491 1733 E BUS LOOP 20, ABILENEUNKNOWN 8/20/96 2 , 2A E,QP F & E OIL CO 096688 2510 S TREADAWAY, ABILENEGASOLINE, DIESEL, WASTE OIL 8/21/90 2 , 2A E,QPASTORAL CARE & COUNSELING CTR 094368 751 HICKORY, ABILENEGASOLINE 12/12/89 5B , 2A E,QPAUL CARROLL WELDING SUPPLY IN 098836 1018 MESQUITE, ABILENEGASOLINE 3/8/91 2 , 2A E,QPENROD PROPERTIES 094444 2890 S 7TH ST, ABILENEGASOLINE 12/19/89 2 , 2A E,QPENROSE LUNBER CO 096906 1041 PINE, ABILENEGASOLINE, DIESEL 9/21/90 2 , 2A E,Q* PRITCHARD, GREG091678 981 E HWY 80, ABILENEGASOLINE 2/16/88 5B , 2A E,QRANDALLS (CULLUM COMPANIES..) 095543 800 ALMOND ST, ABILENEGASOLINE, OTHER 5/15/90 2 , 2A E,QSAV M CONVENIENCE STORES 111267 701 S LEGGET, ABILENEGASOLINE 6/26/96 1B , 1A E,QSKINNY'S INC. 111024 1002 N CLACK, ABILENEGASOLINE 5/19/96 2 , 3 E,QSKINNY'S INC. 111026 3151 OLDHAM, ABILENEGASOLINE 5/19/96 2 , 2A E,QSKINNY'S INC. 111037 3102 GRAPE, ABILENEGASOLINE 5/19/96 2 , 2A E,QSKINNY'S INC. 111073 4801 S 14TH ST, ABILENEGASOLINE 5/23/96 2 , 2A E,QSKINNYS INC 097294 IH--20 ST, MERKELDIESEL 11/19/90 2 , 2A E,QSKINNYS INC 097901 2718 N 1ST, ABILENEGASOLINE 1/17/91 2 , 3 E,QSKINNYS INC 099690 3502 N 6TH, ABILENEGASOLINE 7/24/91 2 , 2A E,QSKINNYS INC 110152 1050 S TREADAWAY, ABILENEGASOLINE 11/29/95 2 , 3 E,QSKINNYS INC 110153 5202 HWY 277, ABILENEGASOLINE 11/29/95 2 , 3 E,QSKINNYS INC 110443 5202 S 7TH, ABILENEGASOLINE 1/23/96 2 , 2A E,QSKINNYS INC 110444 1201 N MOCKINGBIRD, ABILENEGASOLINE 1/23/96 2 , 3 E,QSKINNYS INC 110445 3351 AMBLER, ABILENEGASOLINE 1/18/96 2 , 2A E,QSKINNYS INC 110446 319 NORTH ST, TYEGASOLINE 1/30/96 2 , 6 E,QSKINNYS INC 110447 5110 S 7TH, ABILENEGASOLINE 1/10/96 2 , 2A E,QSKINNYS INC 110448 1450 S CLACK, ABILENEGASOLINE 1/30/96 2 , 2A E,QTNRCC - 165

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TAYLORPSTTERRELLPCD/ENF* SKINNYS INC110449 720 BUTTERNUT, ABILENEGASOLINE 1/30/96 2 , 2A E,QSKINNYS INC 111023 1202 GRAPE, ABILENEGASOLINE 5/19/96 2 , 2A E,Q* SKINNYS INC111025 965 N JUDGE ELY, ABILENEGASOLINE 5/19/96 2 , 2A E,Q* SKINNYS INC111028 1712 LAMAR, SWEETWATERUNKNOWN 5/21/96 2 , 2A E,QSKINNYS INC 111914 1248 N TREADAWAY, ABILENEGASOLINE 11/15/96 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 098776 2626 POST OAK RD, ABILENEDIESEL 2/18/91 2A , 6 E,QSTERLING P. ROBERTSON 094067 1381 DANVILLE, ABILENEGASOLINE 10/25/89 2 , 3 E,QSUNSET STAGES, INC. 104209 324 SYCAMORE, ABILENEDIESEL 7/30/92 2 , 6 E,QTAYLOR COUNTY 092846 501 OAK ST, ABILENEGASOLINE 4/3/89 2 , 2A E,QTAYLOR COUNTY 093531 801 CHEERY ST, MERKELGASOLINE 8/14/89 2A , 2A E,QTEXACO REFINING & MARKETING 091470 2101 STAMFORD, ABILENEGASOLINE 9/30/87 2 , 4 E,QTEXACO REFINING & MARKETING 091772 3101 S 23RD ST, ABILENEGASOLINE 3/9/88 2 , 2A E,QTEXAS DEPT MENTAL HEALTH & M R 091468 S 24TH, ABILENEGASOLINE 9/21/87 2 , 6 E,QTEXAS NATIONAL GUARD ARMORY BD 095401 2542 S 9TH ST, ABILENEGASOLINE 4/11/90 2A , 6 E,QTURLEY ENTERPRISES INC 091366 IH--20, TYEDIESEL 7/1/87 2 , 2A E,QTURLEY ENTERPRISES INC 102444 IH--20, TYEGASOLINE 3/20/92 2A , 1A E,QTURLEY ENTERPRISES INC 102513 IH--20, TYEDIESEL 4/3/92 2A , 1A E,QTXDOT 096526 500 CHERRY ST, MERKELGASOLINE 8/8/90 2 , 2A E,QTXDOT 106397 FM 613, TUSCOLAGASOLINE 11/19/91 2 , 3 E,QUNKNOWN 091240 WILLIS, ABILENEUNKNOWN 7/22/86 5B , 1A E,QUNKNOWN 091310 2700 S 14TH ST, ABILENEUNKNOWN 4/6/87 5B , 2A E,Q* US AIR FORCE DYESS112071 BLDG 4402, ABILENEJET FUEL 6/30/96 1B , 1A E,Q* US AIR FORCE DYESS112072 BLDG 4403, ABILENEJET FUEL 6/3/96 1B , 1A E,Q* US AIR FORCE DYESS112352 STORAGE 9012/9015, DEL RIOUNKNOWN 6/3/97 1B , 1A E,Q* US AIR FORCE DYESS112512 TANK 9005, ABILENEUNKNOWN 8/5/97 1B , 1A E,QVIC CORLEY 098781 JUDGE ELY, ABILENEWASTE OIL 12/14/90 2A , 1A E,QVIKING FREIGHT SYSTEMS 092151 1101 S CHERRY ST, ABILENEGASOLINE 9/23/88 2 , 6 E,QW W HAYNES ESTATE 097007 2210 N TREADAWAY, ABILENEGASOLINE 10/4/90 2 , 2A E,Q* WADE ANTHONY112290 2702 N PINE ST, ABILENEUNKNOWN 5/5/97 2 , 2A E,QWES-T-GO TRUCK STOP 094065 IH-20, TYEGASOLINE 11/1/89 2 , 2A E,QSOUTHERN PACIFIC LINES - SANDERSON 72017 201 DOWNIE STREET,SANDERSON,TX DEPOT 798 BTEX,TPH,CHLORINATEDSOLVENTS2/13/95 2B , 3 ETERRYPSTENF/WSTPCD/VCPSTSOUTHERN PACIFIC LINES 096049 201 DOWNIE ST, SANDERSONGASOLINE 6/20/90 1B , 1A E,QSERFCO - BROWNFIELD (NOWSCO) 39885 1801 LOMESA RD., BROWNFIELD, TX 79316BTEX, ACETONE 7/21/93 3B , 3 EQV* FORMER NOWSCO PROPERTY490 1804 LAMESA HIGHWAY, BROWNFIELDHYDROCARBONS, PH, SOLVENTS,PHENOLS3/18/97 0 , 2B EB E IMPLEMENT 095186 HWY 62, BROWNFIELDWASTE OIL 3/7/90 2 , 2A E,QBENTON OIL CO 110182 MAIN & 1ST ST, BROWNFIELDGASOLINE 12/4/95 2 , 2A E,QCITY OF BROWNFIELD 092823 721 7TH ST, BROWNFIELDDIESEL 3/27/89 2 , 4 E,QDAN NEAL 100914 303 E 3RD ST, WELLMANGASOLINE 11/12/91 5B , 1A E,QTNRCC - 166

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TERRYPSTTHROCKMORTONPSTTITUSENF/WTRPCD/VCPSTTOM GREENENF/WSTENF/WTREDDINS WALCHER CO 093383 20 FM 2196, TOKIOGASOLINE 7/12/89 2 , 5 E,QFINA OIL & CHEMICAL CO 091974 1106 LUBBOCK RD, BROWNFIELDGASOLINE 5/27/88 2 , 4 E,QFIRST NATL BANK OF BROWNFIELD 095608 717 SEAGRAVES RD, BROWNFIELDGASOLINE 5/9/90 2 , 2A E,QGTE SOUTHWEST INC 095084 615 CARDWELL ST, BROWNFIELDGASOLINE 3/15/90 2 , 4 E,QHALLIBURTON SERVICES 099554 1301 W WEBB, BROWNFIELDGASOLINE 6/17/91 2 , 3 E,QJIM REED 66 OIL CO INC 096743 1401 W MAIN, BROWNFIELDGASOLINE, DIESEL 9/5/90 5B , 2A E,Q* KEELING DISTRIBUTING INC112276 HWY 8262, MEADOWUNKNOWN 5/6/97 1B , 1A E,QMASON OIL CO 095195 1406 LUBBOCK RD, BROWNFIELDGASOLINE 3/26/90 5B , 1A E,QRIP GIFFIN TRUCK SER CTR INC 109332 202 TAHOKA RD, BROWNFIELDGASOLINE 3/27/95 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 091140 HWY 380, GOMEZGASOLINE 11/4/86 2 , 2A E,QRIP GRIFFIN TRUCK SER CTR INC 109518 322 1ST ST, BROWNFIELDWASTE OIL, GASOLINE 5/10/95 2 , 2A E,QSOUTHWEST COTTON GROWERS ASSOC 093246 205 LOOP 205, WELLMANGASOLINE 6/29/89 2 , 2A E,QTOM PETTIGREW ESTATE 094599 101 1ST, BROWNFIELDGASOLINE 1/24/90 2 , 2A E,Q* TXDOT096069 800 W WEBB, BROWNFIELDGASOLINE, DIESEL, WASTE OIL 6/11/90 2 , 2A E,QUNION ISD 096767 FM 1067, UNIONGASOLINE 8/28/90 2 , 6 E,QWELLMAN ISD 096656 5TH PO BOX 68, WELLMANGASOLINE 8/28/90 2 , 2A E,QWILKERSON PROPERTIES INC 110161 302 LUBBOCK RD, BROWNFIELDGASOLINE 12/14/95 2 , 2A E,QTHROCKMORTON AG PROD INC 098671 402 N MINTER, THROCKMORTONGASOLINE 4/16/91 1B , 1A E,QTXDOT 101079 HWY 380, THROCKMORTONGASOLINE 11/21/91 2 , 2A E,Q* WOODSON TEXACO093756 HWY 183, WOODSONGASOLINE 8/25/89 2 , 2A E,QT.U. ELECTRIC (MONTICELLO) 01528 1 MI. S OF FM 127 AND 5 MI. SW OF MT. PLSELENIUM, COPPER, IRON 3A , 5 E,Q,VU.S. $1.75 CLEANERS 413 650 SOUTH JEFFERSON AVENUE, MOUNT PLEASANT VOCS 12/5/96 0 , 2B ECIRCLE K STORES 110869 1012 N JEFFERSON, MOUNT PLEASANTGASOLINE 4/18/96 2 , 2A E,QCITY OF MT PLEASANT 095783 402 N WASHINGTON, MOUNT PLEASANTGASOLINE 5/21/90 2 , 2A E,QCITY OF MT PLEASANT 096924 1412 N WASHINGTON, MOUNT PLEASANTGASOLINE, DIESEL, WASTE OIL 7/30/90 2 , 2A E,QEXXON COMPANY USA 093225 IH-30, MOUNT PLEASANTWASTE OIL 6/27/89 2 , 4 E,QNIBLETT OIL CO 108787 2204 N JEFFERSON, MOUNT PLEASANTGASOLINE 10/5/94 2 , 2A E,QTEXAS PARKS & WILDLIFE DEPT 109985 FM 21, PITTSBURGGASOLINE 10/12/95 2 , 6 E,QTEXAS UTILITIES MINING CO 109265 BOX 1636, MOUNT PLEASANTGASOLINE 10/26/94 2 , 2A E,QTU ELECTRIC 105723 FM 127, MOUNT PLEASANTGASOLINE 12/31/92 2A , 1A E,QB & W FOUNDRY & MANUFACTURING 30537 512 UPTON STREET, SAN ANGELOLEAD, CHROMIUM 1/1/98 3 , 3 ESAN ANGELO ELECTRIC SERVICE 30188 926 PULLIAM ST., SAN ANGELOPCB'S 9/8/86 3A , 2A EQV1TEXAS DEPT. OF TRANSPORTATION SAN64138 LOOP 306 & KNICKERBOCKER ROAD, SAN ANGELO METHYLENE, CHLORIDE,9/17/91 3B , 2B EQV2ANGELOFORMALDEHYDE, BTEXTEXAS TANK CAR WORKS, INC. 39806 600 N. BAZE STREET, SAN ANGELOLEAD AND CHROMIUM 1/1/89 4A , 3 EWENDLAND MANUFACTURING 39150 601 W. 11TH ST., SAN ANGELOCHROMIUM 4/22/91 3 , 3 EQV2SAN ANGELO FEEDYARD 01522 16 MI. NORTHEAST OF SAN ANGELO, HWY 67NITRATE 2B , 5 V,1TNRCC - 167

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TOM GREENMSWPCD/ENFPCD/VCPSTCITY OF SAN ANGELO: MW-4, 5, AND 6R MSW00079 NE OF SAN ANGELO ON N SIDE OF OLD US HWY62/277 (OLD BALLINGER HWY) AND THE AT & SFRAILROAD, AND APPROX. 1.8 MI. NE OF INT. OF BELLSTREET AND OLD US HWY 67/277.VOCs (TCE, AND PCE) 2/18/94 2B , 2A E,Q,V,2BJ TITAN SERVICES COMPANY, USA 36250 4005 S. CHADBOURNEHYDROCARBONS,CHLORINATEDHYDROCARBONS9/21/93 2B , 2A EQTEXAS TANK CAR WORKS, INC. 39806 SAN ANGELO, TXLEAD AND CHROMIUM 1/1/89 4A , 3 E* DARLING INTERNATIONAL, INC.545 8394 FM HIGHWAY 380, SAN ANGELONITRATES, NITRITES 6/11/97 0 , 2A E* ASSOCIATED MILK PRODUCERS112150 309 PULLIAN, SAN ANGELODIESEL 2/26/97 2 , 2A E,QAUDIE JETTON (WITH ECHO PUMP) 096771 1906 HOWARD ST, SAN ANGELOGASOLINE 9/7/90 2 , 5 E,QBESSIE L WENDLAND TRUST 106120 3602 GREEN MEADOW, SAN ANGELOGASOLINE, WASTE OIL 12/11/92 1B , 1A E,QC & W ENTERPRISES INC 096351 N HWY 87, GRAPE CREEKGASOLINE 12/13/89 2 , 2A E,QC&W ENTERPRISES 092599 2013 N BRYANT BLVD, SAN ANGELOGASOLINE 1/2/89 2 , 6 E,QCIRCLE K 110831 4808 KNICKERBOCKER RD, SAN ANGELOUNKNOWN 4/18/96 2 , 2A E,QCIRCLE K CORP 092848 FM 2288-GRAPE CREEK, SAN ANGELOGASOLINE 4/4/89 2 , 4 E,QCIRCLE K CORP 103340 4321 SOUTHWEST BLVD, SAN ANGELOGASOLINE 5/25/92 2 , 2A E,QCIRCLE K CORP 107316 2843 COLLEGE HILLS, SAN ANGELOGASOLINE 10/8/93 2 , 4 E,QCITY OF SAN ANGELO 096350 MATHIS FIELD, SAN ANGELOJET FUEL, GASOLINE 11/28/89 2 , 4 E,QCITY OF SAN ANGELO 108276 1020 RED BLUFF RD, SAN ANGELOGASOLINE 4/28/94 2 , 2A E,QCONCHO VALLEY REGIONAL HOSP 109881 2018 PULLIAM, SAN ANGELODIESEL 9/11/95 2A , 6 E,QCRALLE STRATTON 102497 3501 ARDEN RD, SAN ANGELOGASOLINE 3/17/92 2A , 1A E,QCURRENT OCCUPANT 106897 1822 N CHADBOURNE, SAN ANGELOGASOLINE 7/2/93 2 , 2A E,QDARLING INTERNATIONAL, INC. 096875 8394 FM 380, SAN ANGELOGASOLINE, DIESEL 9/19/90 2 , 6 E,QGENERAL BEVERAGE OF TEXAS 094064 1023 FOSTER RD, SAN ANGELOGASOLINE 10/31/89 2 , 6 E,QGEORGE HSU 109926 820 S ABE, SAN ANGELODIESEL 9/29/95 2A , 1A E,QGERLACH OIL CO 109995 114 E AVE L, SAN ANGELOGASOLINE 9/26/95 2 , 2A E,QGTE SOUTHWEST INC 102852 2010 LOOP 306, SAN ANGELOWASTE OIL 5/13/92 2 , 2A E,QLESLIE WANIER 094571 125 N MAIN, SAN ANGELOGASOLINE 12/19/89 5B , 2A E,QMAPCO PETROLEUM CO 092124 2330 SHERWOOD, SAN ANGELOUNKNOWN 8/17/88 2A , 4 E,Q* O K WOLFENBARGER110016 FORD, CHRISTOVALGASOLINE 9/19/95 2 , 2A E,QPRIDE REFINING INC 096655 2122 N CHADBOURNE, SAN ANGELOGASOLINE, DIESEL 9/5/90 2 , 2A E,QRANDALL MOTORS INC 092576 801 W AVE N, SAN ANGELOGASOLINE 1/30/89 2 , 2A E,QRANGER AVIATION ENTERPRISES 103804 8802 HANGER RD, SAN ANGELOAV-GAS 6/2/92 2 , 2A E,QRAY HAWKINS 095974 3304/330 KNICKERBOCKER, SAN ANGELOGASOLINE 6/18/90 2 , 2A E,Q* REECE ALBERT INC111223 3001 FOSTER, SAN ANGELOGASOLINE, DIESEL 6/3/96 2 , 2A E,QREGAL OIL INC 091060 2441 COLLEGE HILLS BLVD, SAN ANGELOGASOLINE 2/4/86 2 , 6 E,QREGAL OIL INC 098219 917 S CHADBOURNE, SAN ANGELOGASOLINE 11/29/89 2 , 2A E,QREGAL OIL INC 099660 3334 KNICKERBOCKER RD, SAN ANGELOGASOLINE 1/10/91 2 , 2A E,Q* REGAL OIL INC111827 107 S ABE, SAN ANGELOGASOLINE 10/25/96 2 , 2A E,Q* REGAL OIL INC112391 424 N MAIN, SAN ANGELOGASOLINE 6/12/97 2 , 2A E,QSAN ANGELO ISD 093535 2030 KNICKERBOCKER, SAN ANGELOGASOLINE 8/4/89 2 , 4 E,Q* SHERWOOD OIL CO110140 2217 KNICKERBOCKER, SAN ANGELOGASOLINE 12/14/95 2 , 2A E,Q* SHERWOOD OIL CO111545 321 MONTECITO DR, SAN ANGELOGASOLINE, DIESEL, JET FUEL 8/22/96 1B , 1A E,QSONORA OZONA OIL CO 094066 2 N KOENINGHIEM, SAN ANGELOGASOLINE 10/23/89 2 , 2A E,QSONORA OZONA OIL CO 096056 2201 KNICKERBOCKER RD, SAN ANGELOWASTE OIL 6/6/90 2 , 5 E,QTNRCC - 168

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TOM GREENPSTWQD* SONORA OZONA OIL CO112367 3305 SHERWOOD WAY, SAN ANGELOUNKNOWN 6/11/97 2 , 2A E,QSTEVE HOLT 095551 15 W CONCHO, SAN ANGELOWASTE OIL 5/7/90 2 , 2A E,QTOWN & COUNTRY FOOD STORES 107910 901 GLENNA, SAN ANGELOGASOLINE 2/24/94 2 , 2A E,Q* TOWN & COUNTRY FOOD STORES108535 1319 WALNUT, SAN ANGELOGASOLINE 8/22/94 2 , 2A E,QTURLEY ENTERPRISES INC 099780 712 N CHADBOURNE, SAN ANGELOGASOLINE 7/27/92 2A , 1A E,QUNKNOWN 091273 UNKNOWN, SAN ANGELOUNKNOWN 5/10/71 5B , 1A E,QUNKNOWN 091485 132 N 24TH, SAN ANGELOGASOLINE 8/6/87 5B , 1A E,QUNKNOWN 093750 7646 VIOLET, GRAPE CREEKGASOLINE 5/1/89 5B , 2A E,QUNKNOWN 096997 BOX 302, CHRISTOVALUNKNOWN 10/10/90 5B , 1A E,QUNKNOWN 103731 19TH, SAN ANGELOGASOLINE 8/14/92 1B , 1A E,Q* US AIR FORCE GOODFELLOW109474 904 SCHERZ AVE, SAN ANGELOGASOLINE, WASTE OIL 9/30/94 2 , 2A E,QUS AIR FORCE GOODFELLOW 109653 ST-04, SAN ANGELOAV-GAS 6/29/95 2 , 5 E,QWEST TEXAS GAS 109976 4006 S CHADBOURNE, SAN ANGELOGASOLINE, DIESEL, OTHER 11/29/95 2 , 2A E,QWEST TEXAS GAS INC 092248 1902 CHADBOURNE ST, SAN ANGELOGASOLINE 7/21/88 2 , 2A E,QZUMA ENTERPRISES 107481 2828 SHERWOOD WAY, SAN ANGELOGASOLINE 9/28/93 2 , 2A E,QZUMA ENTERPRISES 109345 1806 COLLEGE HILLS, SAN ANGELOGASOLINE 12/15/94 2 , 2A E,QSAN ANGELO BY-PRODUCTS COMPANY WQ01594 FM 380 APPROXIMATELY 7.5 MILES EAST OF SAN NITRATE, AMMONIA, SULFATE,ANGELO, TOM GREEN COUNTY, TX.CHLORIDE, AND TOTALDISSOLVED SOLIDS1/1/78 3A,B , 5 E,QTRAVISENF/WSTMSWPCD/CAPCD/ENF* AMERICAN CLEANERS72367 309 WEST FIFTH ST., AUSTINPCE,TCE,1,2-DCE,1,1,1-TCA,CHLOROF,BROMOF8/30/96 3C , 2A EQCHEVRON U.S.A. INC. - AUSTIN TERMINAL 33442 1131 SPRINGDALE RD, AUSTINBTEX, TPH 3/30/87 3B , 4 EQCITGO PETROLEUM CORP - AUSTIN TERMINAL 52092 1105 AIRPORT BLVD, AUSTINBTEX, TPH 3/30/87 3B , 4 EQCOASTAL STATES CRUDE - AUSTIN TERMINAL 36466 1150 JAIN LANE, AUSTINBTEX, TPH 3/30/87 3B , 3 EQEXXON CO USA - AUSTIN TERMINAL 52093 1127 SPRINGDALE RD., AUSTINBTEX, TPH 3/30/87 3B , 4 EQMOBIL OIL CORP - AUSTIN TERMINAL 31665 1111B SPRINGDALE ROAD, AUSTINBTEX,TPH 3/30/87 3B , 4 EQSOUTHWESTERN MOTOR REBUILDERS 52018 502 EAST BEN WHITE BOULEVARD, AUSTINLEAD 3/4/94 3 , 1 ESTAR ENTERPRISE - AUSTIN TERMINAL 35845 1121 SPRINGDALE RD, AUSTINBTEX, TPH 3/30/87 3B , 4 EQTEXAS DEPT. OF MHMR -TRAVIS STATE SCHOOL 52034 8509 FM 969, AUSTINMETHYLENE CHLORIDE, BTEX 7/26/91 2C , 2A EQCITY OF AUSTIN (FORMER MW-4) MSW00360A SE OF BERGSTROM AFB, ALONG THE W SIDE OF FM973, BETW FM 812 AND ONION CREEK, AUSTIN, TX.VOCs (TCE, CIS-1,2-DICHLOROETHENE, 1,4-DICHLOROBENZENE, ACETONE,AND BENZENE)TRAVIS COUNTY/HWY 290: SEVERALPIEZOMETERS.10/30/90 2B , 6C E,Q,V,1MSW00684 0.3 MI. W OF GILES RD. ON N SIDE OF US 290E, TOC, Cl, COD, AND BOD. 12/31/91 2B , 4 E,QAUSTIN, TX.TRAVIS CTY/HWY 183 (FORMER IBM SITE): MW-10 N/A ON S SIDE OF LITTLE WALNUT CREEK ANDE SIDE OF RADIUM 228, AND GROSS ALPHAUS 1835, AUSTIN, TX.RADIOACTIVITY.BERGSTROM AIR FORCE BASE 66002 HWY 71 NEAR DEL VALLEORGANICS,HYDROCARBONS,CHROMIUM12/4/91 0 , 5 E,Q,V,27/1/90 3B , 2A V,1,2,3TEXAS DMHMR - AUSTIN STATE HOSPITAL 61330 35TH & LAMAR, AUSTINHYDROCARBONS 11/17/89 2D , 2A EQV1TEXAS NUCLEAR (TN TECHNOLOGY) 31148 9191 HWY 183, AUSTINSOLVENTS 7/20/90 0 , 2 EQCOASTAL STATES CG 183 SPILL 83388 HWY 183 & 71 INT.,7901 E. BEN WHITE, AUSJP4 2B , 3ATNRCC - 169

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TRAVISPCD/ENFPCD/SUPPCD/VCPSTGAVLON INDUSTRIES, INC. 30498 9808 S. IH 35, AUSTINPAINT SOLVENTS 6/6/85 4 , 5 EQV23HUNTSMAN CORP (TEXACO CHEMICAL) - AUSTIN 30688 7114 N. LAMAR BLVD, AUSTINVOLATILE ORGANICS, METALS 1/1/83 2B , 3 ELINCOLN PROPERTIES HYROCARBONS 0 , 4 E,Q,V,2,3* 300 MEDINA CORPORATION646 301 SAN MARCOS STREET, AUSTINBTEX, TPH, SVOCS 11/7/97 1B , 1 E* CAPITOL AGGREGATES FACILITY619 1001 ED BLUESTEIN BOULEVARD, AUSTINTPH, HYDROCARBONS 9/29/97 0 , 2 EFORMER AMERICAN CLEANERS FACILITY 188 309-11 WEST 5TH STREET, AUSTINSOLVENTS 2/28/96 0 , 2B E* FORMER AUSTRON FACILITY566 1915 KRAMER LANE, AUSTINSOLVENTS 7/8/97 0 , 2 E* LEPRINO FOODS607 1905 EAST 6TH STREET, AUSTINHYDROCARBONS 9/12/97 0 , 4 ERIVERSIDE PLACE SHOPPING CENTER 157 2410 RIVERSIDE DRIVE, AUSTINVOCS 12/29/96 0 , 2B E* SPRINGDALE SHOPPING CENTER408 7112 ED BLUESTEIN BOULEVARD, AUSTINCHLORINATED SOLVENTS 11/27/96 0 , 3 E* TOWNE SQUARE SHOPPING CENTER407 1901 WEST WILLLIAM CANNON DRIVE, AUSTIN CHLORINATED SOLVENTS 11/27/96 0 , 6 ETRAVIS STATE SCHOOL 424 8509 FM 969, AUSTINTPH, VOC 1/2/97 0 , 6 EWATERFORD CENTRE II 349 9101 RESEARCH BOULEVARD, AUSTINCHLORINATED SOLVENTS 9/19/96 0 , 6 EQAUS TACO 093370 2800 GUADALUPE, AUSTINGASOLINE 7/13/89 2 , 6 E,QAUSTIN BRIDGE AND ROAD COMPANY 099280 12112 VOLENTE RD, AUSTINDIST F OIL 11/30/90 2A , 2A E,QAUSTIN METAL & IRON CO INC 097147 301 SAN MARCOS ST, AUSTINGASOLINE 10/11/90 2 , 2A E,QB R CAPPS 100595 520 BASTROP HWY, AUSTINGASOLINE 10/22/91 2 , 5 E,Q* BOB L STONE110045 2300 S CONGRESS, AUSTINGASOLINE 11/6/95 2 , 2A E,QBRIDGESTONE/FIRESTONE, INC. 106686 311 S CONGRESS, AUSTINWASTE OIL 4/15/93 2 , 2A E,QCALHOUN SMITH DISTRIBUTING CO 091861 4514 E MARTIN LUTHER KING BLVD, AUSTINGASOLINE 3/1/88 2 , 2A E,QCALHOUN SMITH DISTRIBUTING CO 091864 9400 N IH-35, AUSTINGASOLINE 3/1/88 2 , 2A E,Q* CALIFORNIA PIZZA KITCHEN112151 10114 JOLLYVILLE RD, AUSTINGASOLINE, DIESEL 1/17/97 2 , 6 E,QCAPITAL METRO TRANSIT AUTHORTY 093482 2910 E 5TH, AUSTINUNKNOWN 8/2/89 2A , 6 E,QCAPITOL CITY OIL 104820 6517 W HWY 290, AUSTINGASOLINE, DIESEL 9/24/92 5B , 1A E,QCAROLINA FREIGHT CARRIERS CORP 094319 8080 PURNELL DR, AUSTINDIESEL 12/20/89 2 , 2A E,QCENCOR REALTY 092741 10820 RESEARCH BLVD, AUSTINWASTE OIL 3/27/89 2 , 4 E,QCENTRAL TEXAS EQUIPMENT CO 093963 127 E RIVERSIDE DR, AUSTINGASOLINE 10/27/89 2A , 6 E,QCHEVRON PRODUCTS COMPANY 092375 13466 RESEARCH BLVD, AUSTINGASOLINE 11/14/88 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093212 2817 GUADALUPE ST, AUSTINGASOLINE 6/30/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 093685 4400 MANCHACA RD, AUSTINGASOLINE 9/12/89 2 , 2A E,QCHEVRON PRODUCTS COMPANY 093880 2300 E BEN WHITE BLVD, AUSTINGASOLINE 10/17/89 2 , 2A E,Q* CHEVRON PRODUCTS COMPANY110672 9318 N IH-35, AUSTINUNKNOWN 3/25/96 2 , 2A E,QCHEVRON USA INC 092991 10947 RESEARCH BLVD, AUSTINGASOLINE 11/1/88 2 , 6 E,QCHEVRON USA INC 105305 30 IH--35, AUSTINGASOLINE 6/12/92 2 , 6 E,QCIRCLE K CORP 091218 7912 HWY 290, AUSTINGASOLINE 2/2/87 2 , 4 E,QCIRCLE K CORP 098570 3208 E HWY 71, DEL VALLEGASOLINE 4/2/91 2 , 2A E,QCIRCLE K CORP 099019 7901-A CAMERON RD, AUSTINGASOLINE 5/15/91 2 , 6 E,Q* CIRCLE K CORP108040 806 E 51ST ST, AUSTINGASOLINE 3/30/94 2 , 2A E,QCIRCLE K CORP 110321 6607B S PLEASANT VALLEY, AUSTINGASOLINE 1/23/96 2 , 2A E,QCIRCLE K STORES INC 110874 15829 N IH-35, PFLUGERVILLEDIESEL 4/26/96 2 , 2A E,QCITIZENS INC 092212 116 E PECAN ST, PFLUGERVILLEGASOLINE 10/11/88 2 , 2A E,QCITY OF AUSTIN 098302 2210 S FM 973, AUSTINDIESEL 2/22/91 2 , 2A E,QCITY OF AUSTIN 109845 2300 BLK ROSEWOOD, AUSTINGASOLINE 4/18/95 2A , 6 E,QCONOCO, INC. 106892 1913 W BEN WHITE BLVD, AUSTINGASOLINE 3/26/91 2 , 4 E,QTNRCC - 170

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TRAVISPSTCONOCO, INC. 109318 5511 CAMERON RD, AUSTINGASOLINE 3/29/95 2A , 1A E,QDBA GREAT HILLS TEXACO 100629 10940 RESEARCH BLVD, AUSTINGASOLINE 9/13/91 2 , 2A E,Q* DIAMOND SHAMROCK112375 9601 FM 1325, AUSTINGASOLINE 4/7/97 1B , 1A E,QDIAMOND SHAMROCK R & M 094456 4602 E STASSNEY, AUSTINGASOLINE 12/14/89 2 , 6 E,QDIAMOND SHAMROCK REF & MKTG CO 091076 8101 MESA, AUSTINGASOLINE 4/25/86 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091647 8538 RESEARCH BLVD, AUSTINGASOLINE 1/22/88 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091720 3909 GUADALUPE, AUSTINGASOLINE 2/23/88 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 096271 5906 AIRPORT BLVD, AUSTINGASOLINE 7/19/90 2 , 6 E,QDON A STEWART INC 109862 5610 W HWY 290, AUSTINGASOLINE 9/12/95 2 , 2A E,QDONALD SAWYER (FATHER) 105257 4011 RED RIVER, AUSTINGASOLINE 10/27/92 2 , 2A E,QE Z SERVE PETRO MARKETING CO. 099118 7430 BURNET RD, AUSTINGASOLINE 5/30/91 2 , 2A E,QEXXON COMPANY USA 091107 7844 BURNET, AUSTINGASOLINE 8/15/86 2 , 6 E,QEXXON COMPANY USA 091595 343 S CONGRESS AVE, AUSTINGASOLINE 4/1/86 2A , 6 E,QEXXON COMPANY USA 094457 9401 N IH-35, AUSTINGASOLINE 12/27/89 2 , 2A E,QEXXON COMPANY USA 102387 2605 S IH-35, AUSTINGASOLINE 2/6/92 2 , 5 E,QEXXON COMPANY USA 103900 500 S LAMAR, AUSTINGASOLINE 7/10/92 2 , 6 E,Q* EXXON COMPANY USA111245 1320 E OLTORF, AUSTINGASOLINE 6/13/96 2 , 2A E,Q* FAST STOP STORES INC110790 4611 E MARTIN LUTHER KING, AUSTINGASOLINE 4/3/96 2 , 2A E,QFDIC 095788 1701 TOOMEY RD, AUSTINGASOLINE 5/10/90 2 , 2A E,QFDIC 103123 206-214 CONGRESS AVE, AUSTINGASOLINE 4/23/92 2A , 1A E,Q* FEDERAL EXPRESS111747 5811 TECHNI CENTER, AUSTINGASOLINE 10/7/96 2 , 3 E,QFSO FACILITIES SERVICE OFFICE 098431 900 BLACKSON AVE, AUSTINGASOLINE, WASTE OIL, CHEMICAL 4/2/91 2 , 2A E,QG P LEASING OF AUSTIN 102651 10611 RESEARCH BLVD, AUSTINGASOLINE, DIESEL 4/12/92 2 , 3 E,QGOODNIGHT FAMILY TRUST 095403 4712 S CONGRESS AVE, AUSTINGASOLINE 4/18/90 5B , 1A E,QHAYES LEASING CO INC 104755 2020 ANCHOR LN, AUSTINGASOLINE 9/24/92 2A , 1A E,QLOWER COLORADO RIVER AUTHORITY 096202 3505 MONTOPOLIS DR, AUSTINGASOLINE, DIESEL 7/10/90 2 , 2A E,Q* MANOR ISD096414 600 E PARSONS, MANORGASOLINE 8/9/90 1B , 1A E,QMAUND FAMILY LTD. PARTNERSHIP 100559 4506 S IH--35, AUSTINWASTE OIL 10/17/91 2 , 2A E,QMCANGUS INVESTMENTS 099911 1136 AIRPORT BLVD, AUSTINGASOLINE 8/6/91 2 , 2A E,QMILBURN INVESTMENTS INC 091812 4231 AIRPORT BLVD, AUSTINUNKNOWN 4/15/88 2A , 6 E,QMOBIL OIL CORP 107633 717 E 7TH ST, AUSTINGASOLINE 2/26/93 2 , 6 E,QMOUNTASIA ENTERTAINMENT INT. 108545 7417 N IH-35, AUSTINGASOLINE 4/27/94 2A , 6 E,QNORWOOD SCOTT 102703 4500 DUVAL, AUSTINGASOLINE 4/20/92 2 , 2A E,QOLD STONE REAL ESTATE SER INC 098620 3724 JEFFERSON ST, AUSTINWASTE OIL 4/12/91 2 , 3 E,QOLIVER 2ND FAMILY LTD PARTNER 091964 13000 FM 812, ELROYUNKNOWN 6/29/88 2 , 6 E,Q* OLIVER SECOND FAMILY LTD112386 1135 AIRPORT BLVD, AUSTINGASOLINE 6/4/97 2 , 2A E,Q* OLIVER SECOND FAMILY LTD112387 6301 N LAMAR, AUSTINUNKNOWN 6/17/97 2 , 2A E,QOLIVER SECOND FAMILY LTD. 096413 809 VARGAS RD, AUSTINGASOLINE 8/1/90 2 , 2A E,Q* OLIVER THIRD FAMILY LTD112385 2238 S LAMAR, AUSTINGASOLINE, DIESEL 6/4/97 2 , 2A E,QPHILLIPS PETROLEUM CORP 110996 2407 LAKE AUSTIN BLVD, AUSTINGASOLINE 5/14/96 2 , 2A E,QRICHARD GOTHARD 096737 2803 SAN JACINTO BLVD, AUSTINGASOLINE 9/11/90 2 , 6 E,QRICHARDS H OIL CO CAPITOL CITY 099374 2915 E 1ST ST, AUSTINGASOLINE, DIESEL 10/26/90 2 , 2A E,QRICON PRODUCTS INC 103332 705 GUNTER ST, AUSTINGASOLINE, DIESEL, ALCOH FUEL 6/4/92 2 , 2A E,QROY KOVAR 105993 98 RED BUD TRL, AUSTINGASOLINE 1/4/93 2 , 2A E,QSHELL OIL CO 094615 8645 RESEARCH BLVD, AUSTINGASOLINE 1/23/90 2 , 6 E,QSHELL OIL CO 107629 601 N IH-35, AUSTINGASOLINE 8/1/93 2 , 6 E,QSMALL BUSINESS ADMINISTRATION 095786 3107 MANOR RD, AUSTINGASOLINE 4/18/90 2 , 2A E,QSOUTHLAND CORP 091874 910 RED RIVER, AUSTINDIESEL 3/15/88 2 , 2A E,QTNRCC - 171

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TRAVISPSTSOUTHLAND CORP 092380 7401 BURNET RD, AUSTINGASOLINE 11/14/88 2A , 6 E,QSOUTHLAND CORP 100227 601 W BEN WHITE BLVD, AUSTINGASOLINE 9/17/91 2 , 2A E,QSOUTHLAND CORP 103119 4511 AIRPORT BLVD, AUSTINGASOLINE 5/13/92 2 , 2A E,QSOUTHLAND CORP 103888 917 N LAMAR, AUSTINGASOLINE 8/22/91 2 , 2A E,QSOUTHLAND CORP 104821 2103 S CONGRESS, AUSTINGASOLINE 7/16/92 2A , 6 E,QSOUTHLAND CORP 106893 4416 MANCHACA, AUSTINGASOLINE 2/15/91 2 , 2A E,QSOUTHLAND CORP 109399 10300 ANDERSON MILL RD, AUSTINGASOLINE 3/6/95 2 , 2A E,Q* SOUTHLAND CORP109621 1747 E OLTORF, AUSTINGASOLINE 6/16/95 2 , 2A E,QSOUTHWESTERN BELL TELEPHONE CO 091998 819 N LOOP, AUSTINGASOLINE 6/28/88 2A , 6 E,QSOUTHWESTERN BELL TELEPHONE CO 100599 1100 LOHMANS CROSSING, LAKEWAYDIESEL 10/22/91 2A , 6 E,QSTACY OLIVER 091369 8700 N LAMAR BLVD, AUSTINUNKNOWN 6/30/87 2A , 6 E,QSTAR ENTERPRISE 095400 2453 BASTROP HWY, AUSTINGASOLINE 2/12/90 2 , 2A E,QSTAR ENTERPRISE 096233 4545 S LAMAR BLVD, AUSTINGASOLINE 6/16/90 2 , 4 E,QSTAR ENTERPRISE 096496 3828 N IH--35, AUSTINGASOLINE 5/7/90 2 , 2A E,QSTAR ENTERPRISE 096921 5740 N IH--35, AUSTINGASOLINE 9/19/90 2A , 6 E,QSTAR ENTERPRISE 097075 1900 GUADALUPE, AUSTINUNKNOWN 7/25/90 2 , 2A E,QSTAR ENTERPRISE 097932 3828 N IH--35, AUSTINGASOLINE 1/31/91 2 , 6 E,QSTAR ENTERPRISE 098726 8224 BURNET RD, AUSTINGASOLINE 4/18/91 2A , 6 E,QSTAR ENTERPRISE 100877 1601 E ST ELMO, AUSTINUNKNOWN 8/13/91 2 , 2A E,QSTAR ENTERPRISE 102338 1405 RR 620, AUSTINGASOLINE 10/30/91 2A , 6 E,QSTARTEX 1ST EQUIP. LTD. PTNR 091135 2700 S CONGRESS, AUSTINGASOLINE 8/7/86 2A , 6 E,Q* STARTEX PETROLEUM INC112384 1149 AIRPORT BLVD, AUSTINGASOLINE, DIESEL 6/4/97 2 , 2A E,QSTATE PURCHASING/GENERAL SER 097342 1502 SAN JACINTO, AUSTINGASOLINE 11/28/90 2 , 2A E,QTEX CON OIL CO 103025 1200 N LAMAR BLVD, AUSTINGASOLINE 5/1/92 2 , 3 E,Q* TEX CON OIL CO108986 10730 S IH-35, AUSTINGASOLINE 7/20/94 2 , 2A E,Q* TEX CON OIL CO111963 9520 W HWY 290, AUSTINUNKNOWN 12/9/96 2 , 2A E,QTEXACO REFINING & MARKETING 104573 1119 AIRPORT BLVD, AUSTINUNKNOWN 9/4/92 2 , 2A E,QTEXAS COMMERCE BANK DEPT ORE 103584 3621 SILVER DOLLAR CIR, AUSTINGASOLINE 1/21/92 2A , 6 E,QTHORNTON OIL CORP 093123 8801 RESEARCH BLVD, AUSTINGASOLINE 6/2/89 2A , 6 E,Q* THREADGILL OIL CO INC111741 13724 AVE K, AUSTINDIESEL 8/15/96 2A , 1A E,QTMT INC 095855 13201 POND SPRINGS RD, AUSTINGASOLINE 6/11/90 5B , 1A E,QTXDOT 091219 13651 RESEARCH, AUSTINGASOLINE 11/17/86 2 , 2A E,QTXDOT 091724 4316 MANCHACA RD, AUSTINGASOLINE 3/11/88 2A , 1A E,QTXDOT 101353 1400 W BEN WHITE BLVD, AUSTINGASOLINE, DIESEL 12/20/91 2A , 1A E,QTXDOT 103505 10940 RESEARCH BLVD, AUSTINGASOLINE 6/24/92 5B , 1A E,QTXDOT 103906 11646 RESEARCH BLVD, AUSTINGASOLINE 7/9/92 2 , 2A E,QUNIVERSITY OF TEXAS AT AUSTIN 092699 1104 MANOR RD, AUSTINDIESEL 3/6/89 2 , 2A E,QUNIVERSITY TEXAS AT AUSTIN 106331 2511 SAN JACINTO, AUSTINGASOLINE 11/19/90 2 , 2A E,QUNKNOWN 091069 1909 BISSEL, AUSTINGASOLINE 3/22/86 5B , 1A E,QUNKNOWN 091563 6TH, AUSTINGASOLINE 12/14/87 5B , 1A E,QUNKNOWN 096831 4600 RED BLUFF, AUSTINGASOLINE 9/25/90 5B , 1A E,QUNKNOWN 099450 701 E 6TH ST, AUSTINGASOLINE 6/3/91 2 , 2A E,QUNKNOWN 099597 N IH--35, AUSTINGASOLINE 7/18/91 2 , 6 E,QUNKNOWN 101816 6515 AIRPORT BLVD, AUSTINGASOLINE 2/6/92 5B , 1A E,QUNKNOWN 102743 905 SHADY LN, AUSTINUNKNOWN 4/23/92 5B , 1A E,QUS AIR FORCE BERGSTROM 096504 B RAMP PUMPHOUSE, AUSTINJET FUEL 7/30/90 2A , 6 E,QUS AIR FORCE BERGSTROM 096506 FUEL OPERATIONS BLDG, AUSTINGASOLINE, DIESEL 7/30/90 2 , 4 E,QVIKING FREIGHT SYSTEMS 109480 7101 N IH-35, AUSTINUNKNOWN 3/1/95 2A , 6 E,QTNRCC - 172

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236TRAVISPSTTRINITYTYLERPSTPCD/VCPSTUPSHURPCD/CAUPSURUPTONPSTPCD/ENFENF/WSTPCD/CAPSTUVALDEENF/WSTWAG A BAG INC 101652 401 FM 685, PFLUGERVILLEGASOLINE 12/21/91 2 , 5 E,QDIAMOND SHAMROCK REF & MKTG CO 092232 101 W MADISON AVE, TRINITYGASOLINE 9/1/88 2 , 4 E,QFIRST NATIONAL BANK CROCKETT 106757 HWY 2781, PENNINGTONGASOLINE 4/23/93 2 , 2A E,Q* FORMER KELLER INDUSTRIES PLANT344 HIGHWAY 69 NORTH, WOODVILLETPH, ALUMINUM 9/16/96 0 , 6 EE TEX OIL CO/ K-P OIL INC 094074 W HWY 190, WOODVILLEGASOLINE 11/20/89 2 , 2A E,Q* JASPER OIL CO112022 1010 S MAGNOLIA, WOODVILLEGASOLINE 12/3/96 2 , 2A E,QCHEVRON U. S. A. INC. - BIG SANDY 31861 HWY 155 & SABINE RIVER, BIG SANDYDIESEL FUEL 11/8/88 3C , 2A EAMBASSADOR COLLEGE 097595 E HWY 80, BIG SANDYGASOLINE, DIESEL 12/27/90 2A , 6 E,QFFP OPERATING PARTNERS 099049 916 N WOOD, GILMERGASOLINE 5/13/91 2 , 2A E,Q* GILMER INDUSTRIAL FOUNDATION108943 DEAN DR, GILMERWASTE OIL 12/9/94 2A , 1A E,QGILMER SAVINGS BANK 101397 N HWY 259, DIANAGASOLINE 12/20/91 2 , 2A E,Q* GILMER SAVINGS BANK107120 620 W TYLER, GILMERGASOLINE 7/10/93 2 , 2A E,QGREEN OIL CO 096591 HWY 271, GILMERGASOLINE 8/28/90 2 , 2A E,Q* GREEN OIL CO100032 HWY 80, BIG SANDYGASOLINE 8/23/91 2 , 2A E,QH E ALLEN GROCERY 092285 500 TITUS ST, GILMERGASOLINE 10/7/88 2 , 2A E,QMCCARTY OIL CO 092501 FM 450, DIANAGASOLINE 1/6/89 2 , 2A E,QPATTERSON WHITE PARTNERSHIP 108383 404 N WOOD ST, GILMERGASOLINE 5/17/94 2 , 2A E,QRAY ALEXANDER 104847 621 N WOOD ST, GILMERGASOLINE 10/2/92 1B , 1A E,QTXDOT 097170 S HWY 271, GILMERGASOLINE, DIESEL 10/30/90 2 , 2A E,QYOUNG OIL CO 105579 843 N TITUS, GILMERDIESEL 12/9/92 2 , 2A E,QROBROY INDUSTRIES 30448 HWY 271 AT DEAN ST, GILMERHEAVY METALS 5/30/85 2B , 3 EQV2,3 YBJ SERVICES CO.,USA (WESTERN CO. NA) 33536 HWY 349 NORTH OF RANKINCHLORIDES, ACID 5/4/88 3B , 5 EEXXON-ABANDONED REFINERY - MCCAMEY 52185 HWY 67 EAST, MCCAMEYVOC 10/7/93 0 , 2 EEDDINS WALCHER CO 092207 HWY 349, RANKINGASOLINE 10/17/88 2 , 4 E,QHALLIBURTON SERVICES 096378 413 CLARA ST, RANKINGASOLINE 8/7/90 2 , 2A E,QTIS/UNIFIRST BANK/UVALDE 39914 SOUTH OF U.S. HWY 90, NEAR TAYLOR SLOUGH, PCE 2/6/86 3B , 5 EQWILMINGTONTNRCC - 173

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236UVALDEPSTVAL VERDEPCD/CAPSTVAN ZANDTPCD/ENFPSTVICTORIAIHWPCD/CAPCD/VCPSTCOCA COLA BOTTLING CO 094146 301 S GETTY, UVALDEGASOLINE 11/20/89 2 , 2A E,QH. E. BUTT GROCERY CO. 109508 201 E MAIN, UVALDEGASOLINE, DIESEL 3/24/95 2A , 1A E,QMAXEY ENERGY CO 093664 HWY 187, UTOPIAGASOLINE 9/4/89 2 , 6 E,QLAUGHLIN AIR FORCE BASE 69007 47 CES/CEV, 251 4TH STREET, LAUGHLIN AIR FORCE BENZENE, TOLUENE, XYLENE,BASEETHYLBENZENE, NAPHTHALENE,TCE9/1/94 3A , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO105521 700 N AVE E, DEL RIOGASOLINE 12/4/92 2 , 2A E,QFFP-LP PARTNERS 092032 1009 AVE F, DEL RIOGASOLINE 7/19/88 2 , 2A E,QGUADALUPE TREVINO 095729 700 MARGARITA ST, DEL RIOGASOLINE 4/17/90 2 , 2A E,QRYTEX INC 103521 409 E GIBBS, DEL RIOUNKNOWN 5/7/92 2 , 2A E,QRYTEX INC 108528 W HWY 90, DEL RIOGASOLINE 8/29/94 5B , 2A E,QSOUTHERN PACIFIC LINES 100076 100 W MAIN ST, DEL RIOGASOLINE, WASTE OIL 7/10/90 2A , 1A E,QUS AIR FORCE LAUGHLIN 100912 BLDG 91 91, DEL RIOGASOLINE 11/14/91 2A , 6 E,Q* US AIR FORCE LAUGHLIN109341 BLDG 53, DEL RIOJET FUEL 1/6/95 2 , 2A E,QUS AIR FORCE LAUGHLIN 110368 ARIZONA AVE, DEL RIOJET FUEL 11/20/95 2 , 6 E,QOTIS ENGINEERING 35509 COUNTY RD. 1817, GRAND SALINEDCA, DICHLOROPROPANE 11/1/91 2B , 4 EANGUS TRAVIS 095687 201 W DALLAS, CANTONGASOLINE 5/9/90 2 , 2A E,Q* CONWAY PETROLEUM MARKETING INC112846 2256 N TRADE DAYS BLVD, CANTONGASOLINE 9/17/97 1B , 1A E,QERNEST PHARES 097509 W HWY 80, GRAND SALINEGASOLINE 12/11/90 2 , 6 E,Q* G B SELF SERVICE INC107118 104 W PINE, EDGEWOODGASOLINE 5/13/93 2 , 2A E,QG W OIL CO 097410 401 W DALLAS ST, CANTONDIESEL 11/6/90 2 , 2A E,QJOYCE Y BLACKWELL INC 102136 W HWY 64, BEN WHEELERGASOLINE, DIESEL 2/26/92 2 , 2A E,QKIDD JONES OIL COMPANY 092409 524 E GARLAND ST, GRAND SALINEGASOLINE 12/5/88 2A , 1A E,QLILLIAN ROSS MRS 095399 203 DALLAS, CANTONGASOLINE 4/9/90 2 , 2A E,Q* MITCHELL OIL COMPANY109768 308 N 4TH, WILLS POINTGASOLINE 7/7/95 2A , 1A E,Q* SKAM ENTERPRISES INC112495 IH 20, WILLS POINTGASOLINE 3/17/94 2 , 2A E,QSTAR ENTERPRISE 096896 IH 20, CANTONGASOLINE 10/3/90 2 , 6 E,QTRIPLE B TRUCK STOP-BANKRUPTCY 104977 IH--20, CANTONGASOLINE 8/18/92 2 , 2A E,Q* TWIN LAKES PETROLEUM INC112098 495 W HWY 243, CANTONGASOLINE, DIESEL 1/10/97 2 , 2A E,QVAN ZANDT COUNTY TREASURER 101567 HWY 198, PHALBADIESEL 1/3/92 2 , 2A E,QDU PONT DE NEMOURS 30079 FM ROAD 404, 8 MI SOUTH OF VICTORIAORGANICS 4/24/87 3A , 4,5 E,Q,V,2,3DU PONT DE NEMOURS 30079 FM ROAD 404, 8 MI SOUTH OF VICTORIAORGANICS 4/24/87 3A , 5 E,Q,V,2,3* CITGO - VICTORIA TERMINAL633 1708 NORTH BEN JORDAN BOULEVARD, VICTORIA BTEX, TPH 10/10/97 1B , 1 EA YORK TRUST/C YORK ESTATE 108976 4204 N MAIN, VICTORIAUNKNOWN 12/29/94 2 , 2A E,QTNRCC - 174

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236VICTORIAPSTWALKERENF/WSTPCD/CAPSTWALLERPCD/CAPCD/SUPPCD/VCPSTANGER LEO INC 104061 FM 445, MCFADDINGASOLINE, KEROSENE 7/27/92 2 , 2A E,QC L THOMAS PETROLEUM 111788 6490 FM 326, VICTORIAGASOLINE 10/14/96 2 , 6 E,QCENTRAL POWER & LIGHT 095205 1205 BOTTOM ST, VICTORIACHEMICAL 9/7/89 2 , 4 E,QCHEVRON PRODUCTS COMPANY 093249 2603 PORT LAVACA DR, VICTORIAGASOLINE 6/29/89 2 , 2A E,Q* COASTAL MAVERICK109551 101 E RIO GRANDE, VICTORIAGASOLINE 3/19/95 2 , 2A E,QCOASTAL MAVERICK 109552 1302 E RIO GRANDE, VICTORIAGASOLINE 3/19/95 2 , 2A E,QHILAL HAMOUDAH 109268 2006 N BEN WILSON, VICTORIAGASOLINE 3/3/95 2 , 2A E,Q* IN & OUT MINI MART INC112540 1504 E JUAN LINN, VICTORIAGASOLINE, DIESEL, WASTE OIL 7/24/97 2A , 6 E,QLEO ANGER INC 105631 1615 PORT LAVACA DR, VICTORIAGASOLINE 9/25/92 2 , 6 E,Q* NEW DISTRIBUTING CO111308 2401 LONE TREE RD, VICTORIAGASOLINE 6/12/96 2 , 2A E,Q* NEW DISTRIBUTING CO111579 2407 PORT LAVACA DR, VICTORIAGASOLINE 7/27/96 2 , 2A E,Q* NEW DISTRIBUTING CO INC111970 2103 E HOUSTON HWY, VICTORIAGASOLINE 12/4/96 2 , 2A E,Q* NEW DISTRIBUTING CO INC112515 1708 N BEN JORDAN, VICTORIAGASOLINE 5/22/97 2 , 2A E,QROBERT BAILEY 095324 5007 COUNTRY CLUB, VICTORIAGASOLINE 1/16/90 1B , 6 E,QSOUTHLAND CORP 092090 2207 N BEN JORDAN, VICTORIAGASOLINE 7/29/88 2 , 2A E,QSSP PARTNERS 107872 HWY 77, VICTORIAGASOLINE 2/23/94 2 , 2A E,Q* STAN HEINOLD112289 2102 HOUSTON HWY, VICTORIAGASOLINE 2/27/97 1B , 1A E,QSUMMERS TRUST 110830 4002 N NAVARRO, VICTORIAUNKNOWN 4/18/96 2 , 6 E,QVICTORIA ISD 096652 908 N LAURENT, VICTORIAGASOLINE 8/17/90 2 , 2A E,QTEXAS DEPT. OF CRIMINAL JUST.-ELLIS I&II 71331 12 MI N OF HUNTSVILLEPENTACHLOROPHENOL 2/12/86 3B , 2A EQV23TEXAS DEPT. OF CRIMINAL JUSTICE 74669 FM 980, HUNTSVILLEPCP 12/13/86 2A , 3 ECITY OF HUNTSVILLE 102341 201 BOETTCHERS MILL DR, HUNTSVILLEGASOLINE 8/9/91 2 , 4 E,Q* DIAMOND SHAMROCK INC111647 1328 SAM HOUSTON AVE, HUNTSVILLEUNKNOWN 9/24/96 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 094087 HWY 19, RIVERSIDEGASOLINE 11/15/89 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO097956 3294 IH--45, HUNTSVILLEGASOLINE 2/5/91 2 , 2A E,Q* DIAMOND SHAMROCK REF & MKTG CO102345 2811 11TH ST, HUNTSVILLEGASOLINE 11/8/91 2 , 2A E,Q* E M SMITHER COMPANY106581 1608 11TH ST, HUNTSVILLEGASOLINE 4/28/93 2 , 2A E,QGIBBS BROTHER & CO 098329 561 S SAM HOUSTON AVE, HUNTSVILLEGASOLINE 3/19/91 2 , 2A E,QSTAR ENTERPRISE 102954 1606 IH--45, HUNTSVILLEUNKNOWN 9/30/92 2A , 6 E,QTEXAS DEPT CRIMINAL JUSTICE 103829 815 12TH ST, HUNTSVILLEGASOLINE, DIESEL 10/18/91 2A , 1A E,QWALKER BROTHERS LUMBERS CO 095537 HWY 75, HUNTSVILLEGASOLINE 4/19/90 2 , 2A E,QFLOW TECHNOLOGIES, INC 38835 KOOMEY RD, BROOKSHIREMERCURY 8/30/94 0 , 2 ESHERIDAN DISPOSAL SERVICE SUPERFUNDSITEABOUT 10 MILES S.W. OF HEMPSTEAD ON THESOUTHERN BANK OF THE BRAZOS RIVERVOLATILE ORGANIC COMPOUNDS* PROGRESSIVE METALS PROPERTY185 19814 G. H. CIRCLE, WALLERMETALS 2/26/96 0 , 2 E* FREDDIE & JUDY ZACH110277 1925 13TH, HEMPSTEADGASOLINE 1/9/96 2 , 2A E,Q5A , 3E,Q,V,2,3TNRCC - 175

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236WALLERPSTWARDENF/WSTIHWPSTWASHINGTONENF/WSTWEBBPSTENF/WSTPCD/CAPCD/ENF* MUHAMMED EHSANUL BAQUT110112 3118 TAYLOR, WALLERGASOLINE 11/28/95 2 , 2A E,Q* STOP N SERV110170 2610 HEMPSTEAD HWY, WALLERGASOLINE 12/18/95 2 , 2A E,QTHERESA SHOOPE 099442 2621 HWY 290, WALLERWASTE OIL 5/15/91 2 , 5 E,QTOMPSKIN JAMES 104543 10TH ST, HEMPSTEADGASOLINE, WASTE OIL 8/28/92 1B , 1A E,QTXDOT 098149 HWY 90, BROOKSHIREGASOLINE 3/6/91 2 , 6 E,QDOWELL SCHLUMBERGER - MONAHANS 33584 OZARK MAHONEY SERVICE ROAD, MONAHANS VOLATILE HYDROCARBONS 11/20/85 3A , 2 EQV3DOWELL - MONAHANS 33584 45 MILES WEST OF MIDLAND ON OZARKA MAHONEY BENZENE, TOLUENE, XYLENES, 1,RD, MONAHANS2-EDC, 1,1-EDC1/1/93 3A , 4,5 E,QEXXON COMPANY USA 098425 1904 S STOCKTON AVE, MONAHANSGASOLINE 3/15/91 2 , 6 E,QFRANKS FUELS INC 111499 802 E SEALY, MONAHANSGASOLINE 8/8/96 2 , 2A E,QHALLIBURTON SERVICES 096548 W HWY 80, MONAHANSGASOLINE 8/21/90 2 , 6 E,Q* HALLIBURTON SERVICES104551 N LOOP 464, MONAHANSDIESEL 9/9/92 2 , 2A E,QKENT DISTRIBUTORS 091785 2113 S STOCKTON, MONAHANSGASOLINE 4/1/88 2 , 4 E,QMCLAIN TRUCK SERVICE INC 093885 101 E SEALY, MONAHANSGASOLINE 10/1/89 1B , 1A E,QMEADERS & TATUM INC 097601 1911 S STOCKTON, MONAHANSGASOLINE 11/16/90 2 , 5 E,QMEADERS OIL CO 096226 310 S MAIN, MONAHANSGASOLINE 7/2/90 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 101198 2101 S STOCKTON, MONAHANSGASOLINE 12/2/91 2 , 2A E,Q* SOUTHWEST MARKETERS112258 818 N MAIN ST, MONAHANSGASOLINE 4/17/97 2 , 2A E,Q* SOUTHWEST MARKETERS112497 504 W A ST, MONAHANSGASOLINE 7/23/97 2 , 2A E,QSOUTHWEST MARKETERS INC 092330 700 W IH--20, MONAHANSGASOLINE 11/23/88 2 , 2A E,QSOUTHWEST MARKETERS INC 095054 AVE D, GRANDFALLSGASOLINE 1/25/90 2A , 2A E,QSOUTHWESTS MARKETERS 107362 707 E 4TH, MONAHANSGASOLINE 10/21/93 2 , 2A E,QTOMPKINS OIL COMPANY 092404 432 W IH--20, MONAHANSGASOLINE 12/7/88 1B , 1A E,QUNIVERSITY OF TEXAS LANDS 105379 101 S OBRIEN, WICKETTGASOLINE 8/20/92 2 , 2A E,QOLD BRAZOS FORGE (RETEK) (HUSSMAN CORP) 82313 LOOP 36 NW, BRENHAMCHROMIUM 1/5/93 3B , 3A EV1* ALEXANDER OIL CO112486 HWY 290, BRENHAMGASOLINE 6/25/97 1B , 1A E,Q* FELDER OIL CO106999 HWY 180, BRENHAMGASOLINE 7/26/93 2 , 2A E,QMOUNT VERNON MILLS INC 096419 701 E COMMERCE ST, BRENHAMGASOLINE 7/10/90 2 , 4 E,QNATHAN WINKELMANN 110362 1612 S DAY, BRENHAMGASOLINE 12/16/95 2 , 5 E,QRAY FINKE 103038 318 S AUSTIN ST, BRENHAMGASOLINE 10/29/91 5B , 2A E,QDOWELL SCHLUMBERGER - LAREDO 33571 TEJA S LOOP & LAS CRUCES DR., LAREDOVOC'S,TPH,BTEX 7/11/89 3B , 2A EQV2CITY OF LAREDO CATTLE DIPPING T0462 4.3 MILES NORTH ON MILO ROAD, LAREDOPESTICIDES 8/21/96 0 , 6 EANZON, INC. 31403 N OF INT OF IH35 & MINES RD (FM1472) INANTIMONY 2/25/92 3B , 4 EBARKER AEROMOTIVE, INC. 52117 LAREDO INTERNATIONAL AIRPORT, LAREDOHYDROCARBONS 2/12/92 2C , 4 V1TNRCC - 176

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236WEBBPSTARGUINDEGUI OIL CO 102531 3419 SAN DARIO, LAREDOGASOLINE 4/6/92 2 , 2A E,QB. P. NEWMAN OIL COMPANY 109077 519 E CALTON, LAREDOGASOLINE 1/9/95 2 , 2A E,QBELSHAW, RON 095316 4800 MCPHERSON, LAREDOGASOLINE 2/20/90 5B , 1A E,QCHEVRON PRODUCTS COMPANY 092352 3502 SANTA URSULA, LAREDOGASOLINE 12/1/88 2 , 4 E,QCITY OF LAREDO 095021 518 FLIGHTLINE, LAREDOJET FUEL 3/13/90 2 , 2A E,Q* CITY OF LAREDO101133 4200 URBAN AVE, LAREDOGASOLINE 10/30/91 2 , 2A E,QCITY OF LAREDO 104866 ONE FLIGHTLINE BLDG 132, LAREDOUNKNOWN 6/25/92 2A , 1A E,QCITY OF LAREDO 106165 518 FLIGHTLINE BLDG 132, LAREDOWASTE OIL, AV-GAS 2/17/93 1B , 1A E,QCOASTAL MAVERICK 100497 3320 SAN BERNARDO, LAREDOGASOLINE 9/26/91 2 , 2A E,QCOASTAL MAVERICK 109437 2402 E BLAINE ST, LAREDOGASOLINE 3/27/95 2 , 2A E,QCOASTAL MAVERICK 109438 8612 MCPHERSON, LAREDOGASOLINE 3/27/95 1B , 1A E,Q* DIAMOND SHAMROCK REF & MKTG CO108187 602 LAFEYETTE, LAREDOGASOLINE 3/22/94 2 , 2A E,QDOWELL SCHLUMBERGER INC 095022 TEJAS LOOP, LAREDOGASOLINE 3/2/90 2 , 2A E,Q* ED RAMIREZ JR110270 3100 MEADOW, LAREDOGASOLINE, DIESEL 8/21/95 2 , 2A E,Q* EXXON COMPANY USA111400 IH 35, LAREDOGASOLINE, WASTE OIL 7/17/96 2 , 2A E,Q* EXXON COMPANY USA111961 620 WASHINGTON, LAREDOUNKNOWN 12/4/96 2 , 2A E,QFESCO INC 107699 S TEXAS INDUSTRIAL BLVD, LAREDOGASOLINE 1/14/94 2 , 2A E,QGENERAL BEVERAGES OF TEXAS 094018 2001 CORPUS CHRISTI ST, LAREDOGASOLINE 11/2/89 2 , 2A E,QGILBERT INTERNATIONAL 104583 6219 GILBERT RD, LAREDOGASOLINE, DIESEL 9/18/92 2A , 6 E,QGONZALEZ PROPERTIES 095059 4200 SAN BERNARDO, LAREDOGASOLINE 2/15/90 2 , 3 E,Q* GUERRERO TEXACO107698 1602 MARKET ST, LAREDOGASOLINE 1/14/94 2 , 2A E,QHGP CORP.(FORMER J&E OIL) 105277 2419 SAN BERNARDO, LAREDOGASOLINE, DIESEL 11/5/92 2 , 2A E,QHICKS OIL & BUTANE CO 102798 2720 ROSS ST, LAREDOGASOLINE 4/24/92 2A , 1A E,QINTERNATIONAL BANK COMMERCE 101901 5800 IH--35, LAREDOWASTE OIL, GASOLINE 2/11/92 2A , 6 E,Q* J & E OIL CO112593 1301 SANTA MARIA, LAREDOGASOLINE 9/4/97 1B , 1A E,Q* J & E OIL CO112595 307 PARK, LAREDOGASOLINE 9/4/97 1B , 1A E,Q* J & E OIL INC112592 401 MATAMOROS, LAREDOGASOLINE 9/4/97 1B , 1A E,Q* J & OIL CO112596 4001 SAN BERNARDO, LAREDOGASOLINE 9/4/97 1B , 1A E,QJ & R AUTO SALES 101903 2801 SAN BERNARDO, LAREDOGASOLINE 2/11/92 2A , 1A E,QKILLAM DEVELOPMENT CORP 110911 12655 MINES RD, LAREDODIESEL, AV-GAS 3/4/91 2A , 6 E,QLAREDO ISD 108834 101 W SAUNDERS, LAREDOGASOLINE 11/17/94 2A , 1A E,QLAREDO MORNING TIMES 099002 111 ESPERANZA DR, LAREDOGASOLINE 5/16/91 2A , 6 E,QLAREDO TRUCK STOP 097896 5301 SANTA MARIA, LAREDODIESEL 1/31/91 2 , 6 E,QLEOPOLDO AYALA 094151 5719 SAN DARIO, LAREDOGASOLINE 12/18/89 2 , 2A E,QLEYENDECKER OIL INC 097964 4420 SAN BERNARDO, LAREDOGASOLINE 2/7/91 2 , 2A E,QLEYENDECKER OIL INC 098030 2720 SAUNDERS, LAREDOGASOLINE 2/14/91 2 , 6 E,QLOIS R. HALL 103175 1015 SAUNDERS, LAREDOGASOLINE 6/2/92 2A , 1A E,QNARVAEZ GILBERTO 100812 1301 ZAPATA HWY, LAREDOGASOLINE 11/6/91 2 , 2A E,QNEWMAN B P INVESTMENT 100424 801 GUSTAVUS, LAREDOGASOLINE, DIESEL 9/23/91 2 , 6 E,Q* PAUL YOUNG108449 HWY 59, LAREDOUNKNOWN 8/2/94 2 , 2A E,QREYNA ENRIQUE 095233 3402 SAN BERNARDO, LAREDOGASOLINE 3/21/90 2 , 2A E,QSSP PARTNERS 099488 602 N ZAPATA HWY, LAREDOGASOLINE 6/28/91 2 , 2A E,Q* SSP PARTNERS110606 3919 SAN BERNARDO, LAREDOUNKNOWN 1/29/96 2 , 2A E,QSSP PARTNERS 110611 2701 SAN BERNARDO, LAREDOGASOLINE 1/29/96 2A , 1A E,QTEXAS DEPT OF PUBLIC SAFETY 096314 8400 N IH--35, LAREDOGASOLINE 7/16/90 2 , 2A E,QTOM YATES PETROLEUM CO 105734 901 MATAMOROS, LAREDOGASOLINE 12/28/92 2 , 2A E,QTOM YATES PETROLEUM CO INC 099648 2019 GUADALUPE, LAREDOGASOLINE 12/15/90 2A , 1A E,Q* TOM YATES PETROLEUM CO INC103698 919 CORPUS CHRISTI, LAREDOGASOLINE 7/17/92 2 , 2A E,QTNRCC - 177

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236WEBBPSTWHARTONPCD/VCPSTWHEELERPSTWICHITAENF/WSTPCD/CAPCD/VCPSTUNITED ISD 106653 501 EDEN LN, LAREDOGASOLINE, DIESEL 5/10/92 2A , 6 E,QUS BORDER PATROL 106746 207 W DEL MAR BLVD, LAREDOUNKNOWN 5/31/93 2 , 2A E,Q* US POSTAL SERVICE107959 2700 SAUNDERS, LAREDOGASOLINE 3/4/94 2 , 2A E,QYATES STORES INC 094152 301 SALINAS, LAREDOGASOLINE 12/1/89 2A , 1A E,Q* EL CAMPO ALUMINUM COMPANY, INC.538 ROUTE 3, EL CAMPOHYDROCARBONS, METALS 5/30/97 0 , 2 EDIAMOND MINI MARTS INC 099888 1101 N MECHANIC ST, EL CAMPOGASOLINE 12/10/90 2 , 2A E,QDIAMOND SHAMROCK 105013 2202 RICHMOND, WHARTONGASOLINE, DIESEL 10/14/92 2 , 2A E,QDORTHY ARCHER 107154 10718 HWY 1301, BOLINGGASOLINE 8/23/93 2 , 2A E,Q* EDCO109264 HWY 59, HUNGERFORDGASOLINE 3/9/95 2 , 2A E,QFLINTEX OIL CO 111845 5228 HWY 59, WHARTONGASOLINE, DIESEL 10/25/96 2 , 2A E,QHE BUTT GROCERY CO 107049 605 N RICHMOND RD, WHARTONDIESEL 8/9/93 2 , 2A E,Q* HILLTOP TEXAS COUNTRY STORE110951 13601 S HWY 59, KENDLETONUNKNOWN 5/8/96 2 , 2A E,QLEEDO CABINETRY 106407 100 FOUNDATION LOOP, EAST BERNARDGASOLINE 3/28/93 2 , 2A E,Q* MID COAST DISTRIBUTING108146 701 W JACKSON, EL CAMPOGASOLINE, DIESEL 4/29/94 2 , 2A E,QC & H SUPPLY INC 096883 1206 N MAIN, SHAMROCKGASOLINE 9/1/90 2 , 2A E,QROYCE CANTRELL CORP 097320 1400 N MAIN, SHAMROCKGASOLINE 11/19/90 2 , 2A E,QTXDOT 097739 N HWY 83, WHEELERGASOLINE 12/13/90 2 , 2A E,Q* SHEPPARD ACCESS ROADF0028 1100 SHEPPARD ACCESS, WICHITA FALLSBTEX, SVOC 8/20/96 2C , 0 ESHEPPARD AIR FORCE BASE 64009 82 CES/DEEV, 231 9TH AVE, SHEPPARD AFB,CHROMIUM, NICKEL, ARSENIC,WICHITA FALLSORGANICS10/1/90 3A , 2A E,QPPG INDUSTRIES, INC. 069 7400 CENTRAL HIGHWAY NORTH, WICHITA FALLS PETROLEUM, METALS 10/24/95 0 , 6 EUNITED ELECTRIC COMPANY - MAGIC AIRE 232 501 GALVESTON STREET, WICHITA FALLSCHLORINATED SOLVENTS 4/18/96 0 , 5 EDIVISION* ABELL OIL CO111933 1211 BROAD, WICHITA FALLSGASOLINE 11/6/96 2 , 2A E,Q* ABELL OIL CO INC094666 4700 KELL BLVD, WICHITA FALLSGASOLINE 12/20/89 2 , 2A E,QABELL OIL CO INC 110761 2730 SOUTHWEST PKWY, WICHITA FALLSGASOLINE 3/29/96 2 , 2A E,Q* ANDREW L WEST/AMY WEST HILLMAN105091 1200 6TH ST, WICHITA FALLSGASOLINE 9/25/92 2 , 2A E,QAYRES DISTRIBUTING COMPANY 093560 1318 9TH ST, WICHITA FALLSGASOLINE 8/28/89 2 , 2A E,QAYRES OIL INC 111278 512 EAST HWY, IOWA PARKGASOLINE 6/28/96 2 , 2A E,Q* AYRES OIL INC111411 1500 JOHNSON RD, WICHITA FALLSGASOLINE 9/2/96 2 , 2A E,Q* AYRES OIL INC111494 501 SOUTHWEST FWY, WICHITA FALLSGASOLINE 8/20/96 1B , 1A E,QBANK ONE TEXAS NA 107667 901 LAMAR ST, WICHITA FALLSUNKNOWN 11/23/93 2 , 2A E,Q* BILL BAILEY JR111575 810 E HWY, IOWA PARKGASOLINE 9/4/96 2 , 2A E,Q* BOBBY TODD112865 4316 W CALLFIELD RD, WICHITA FALLSUNKNOWN 12/30/97 5B , 1A E,Q* BRODIE BUICK & MITSUBISHI109449 2213 JACKSBORO HWY, WICHITA FALLSGASOLINE 3/23/95 2 , 2A E,Q* BROWN'S SERVICE CENTER112398 3604 SHEPPARD ACCESS RD, WICHITA FALLS GASOLINE 6/16/97 2 , 2A E,QTNRCC - 178

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236WICHITAPST* CHAMBLES OIL CO112205 3707 SHEPPARD ACCESS RD, WICHITA FALLS GASOLINE 3/18/97 2 , 2A E,Q* CHAMBLES OIL CO112435 3704 JACKSBORO HWY, WICHITA FALLSGASOLINE 6/23/97 2 , 2A E,Q* CHAMBLES OIL CO112436 1009 11TH, WICHITA FALLSGASOLINE 6/23/97 2 , 2A E,Q* CHAMBLES OIL CO112437 4510 RHEA RD, WICHITA FALLSGASOLINE 6/23/97 2A , 6 E,QCHAMBLES OIL CO. 108530 4646 JACKSBORO HWY, WICHITA FALLSGASOLINE, DIESEL 7/21/94 2 , 2A E,Q* CHAMBLES OIL/TEXHOMA PETROLEUM110217 1431 32ND ST, WICHITA FALLSGASOLINE 12/29/95 2 , 2A E,Q* CHARLES REEVES108659 2207 AVE H, WICHITA FALLSDIESEL 9/10/94 2 , 2A E,Q* DANNY FOIX112580 2620 SOUTHWEST PKWY, WICHITA FALLSGASOLINE 9/2/97 1B , 1A E,Q* DAVID & JAMES GILMORE112052 3511 JACKSBORO HWY, WICHITA FALLSGASOLINE 1/15/97 2 , 2A E,QDON FIELDS 109066 508 E HWY, IOWA PARKGASOLINE 12/12/94 2A , 1A E,Q* E Z SERVE INC111689 906 SHEPPARD, BURKBURNETTGASOLINE 9/20/96 2 , 2A E,Q* EAGLE FOOD MART, L.C.110984 2400 BROOK, WICHITA FALLSGASOLINE 5/10/96 2 , 2A E,QEAGLE MART 109279 1205 HOLLIDAY, WICHITA FALLSGASOLINE 3/9/95 2 , 2A E,QEAGLE MART 110412 4006 CALL FIELD, WICHITA FALLSGASOLINE 2/1/96 2 , 6 E,Q* EAGLE MART111359 911 KEMP ST, WICHITA FALLSGASOLINE 6/11/96 2 , 2A E,Q* EAGLE MART112274 101 FORT WORTH ST, WICHITA FALLSGASOLINE 4/25/97 2 , 2A E,Q* EAGLE MART112455 100 HATTON RD, WICHITA FALLSGASOLINE 7/2/97 2A , 6 E,QEAGLE MART INC 110900 5400 SOUTHWEST PKWY, WICHITA FALLSGASOLINE 5/21/96 2 , 2A E,Q* EAGLE MART L C111641 414 S BEVERLY, WICHITA FALLSUNKNOWN 11/18/96 2 , 2A E,Q* EAGLE MART L C111932 6300 SOUTHWEST PKWY, WICHITA FALLSUNKNOWN 11/25/96 2 , 2A E,QEBNER BROTHERS, INC. 103147 4201 BURKBURNETT RD, WICHITA FALLSGASOLINE 10/17/91 2A , 1A E,QEXXON COMPANY USA 097114 3201 NORTHWEST FWY, WICHITA FALLSGASOLINE 6/5/90 2 , 6 E,QEXXON COMPANY USA 101983 2317 JACKSBORO HWY, WICHITA FALLSGASOLINE 2/24/92 2A , 6 E,QFLAKE INDUSTRIAL SERVICES INC 102850 2816 RED RIVER EXWY, WICHITA FALLSGASOLINE 4/29/92 2 , 2A E,QFRANK L MCCOY 109533 2714 SOUTHWEST PKWY, WICHITA FALLSUNKNOWN 5/2/95 2 , 2A E,Q* FUEL STOP INC111507 3124 5TH ST, WICHITA FALLSGASOLINE 8/16/96 1B , 1A E,Q* GBN INC111911 307 MISSISSPPI, WICHITA FALLSGASOLINE 11/17/96 2 , 2A E,Q* GLORIA LAVENDER112083 2701 KELL BLVD, WICHITA FALLSUNKNOWN 1/27/97 5B , 1A E,QGROZIER & MANN 111463 1624 MIDWESTERN PKWY, WICHITA FALLSGASOLINE, DIESEL 8/6/96 2 , 2A E,QGROZIER & MANN 111465 2320 JACKSBORO HWY, WICHITA FALLSGASOLINE 8/6/96 2 , 2A E,QGROZIER & MANN 111467 701 N EASTSIDE DR, WICHITA FALLSGASOLINE 8/6/96 2 , 2A E,QGROZIER & MANN CO 111317 EXPRESSWAY, BURKBURNETTGASOLINE 6/11/96 2 , 2A E,QGROZIER & MANN OIL CO 111831 1702 HAYES ST, WICHITA FALLSGASOLINE 8/23/96 2 , 2A E,QGROZLER & MANN OIL CO 110981 2400 IOWA PARK, WICHITA FALLSGASOLINE 4/25/96 2 , 2A E,Q* GROZLER & MANN OIL CO110982 1405 SOUTHWEST PKWY, WICHITA FALLSGASOLINE 4/25/96 2 , 2A E,Q* GROZLER & MANN OIL CO110983 1112 HOLLIDAY, WICHITA FALLSGASOLINE 4/25/96 2 , 2A E,Q* HAIGOOD & CAMPBELL093734 305 N SCOTT, WICHITA FALLSGASOLINE 9/14/89 2 , 2A E,QJACKSON- DELTON & SANDY 102032 FM 369 HWY 370, PLEASANT VALLEYGASOLINE, DIESEL 3/4/92 2 , 2A E,Q* JAMES SMITH112529 2228 BROOK, WICHITA FALLSGASOLINE 3/25/97 2 , 2A E,QJASPER HICKSON 111754 901 BROOK, WICHITA FALLSGASOLINE 8/9/96 2 , 5 E,QJOHN BERNARD JR 111376 1108 INDIANA, WICHITA FALLSGASOLINE 7/15/96 2 , 2A E,QK C OIL CO 099123 HWY 287, WICHITA FALLSGASOLINE 7/11/90 2 , 6 E,Q* K C OIL CO112141 1309 JOHNSON RD, IOWA PARKUNKNOWN 3/3/97 2 , 2A E,Q* K C OIL CO112337 2214 9TH ST, WICHITA FALLSGASOLINE 5/19/97 2 , 2A E,Q* K C OIL CO112338 1800 E SCOTT, WICHITA FALLSGASOLINE, DIESEL 3/31/97 2 , 2A E,QKENNETH ALEXANDER 110088 324 E 3RD ST, BURKBURNETTGASOLINE, DIESEL 11/14/95 2 , 2A E,Q* PRESTON PRODUCTS INC112152 3201 LAWRENCE RD, WICHITA FALLSUNKNOWN 3/3/97 2 , 2A E,QPROPERTY DEVELOPMENT ASSOC 108900 3801 OLD JACKSBORO HWY, WICHITA FALLSGASOLINE, DIESEL 2/1/94 2 , 2A E,QTNRCC - 179

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236WICHITAPSTWILBARGERPSTQUICK FILL OF WICHITA FALLS 091558 MAURINE, WICHITA FALLSGASOLINE 12/9/87 2 , 4 E,QRAEI GEORGI KAYSSAR 094008 1408 SCOTT ST, WICHITA FALLSGASOLINE 10/13/89 2A , 2A E,QRAEI GEORGI KAYSSAR 094153 1408 SCOTT ST, WICHITA FALLSGASOLINE 10/13/89 2A , 1A E,Q* RETAIL BUILINGS, INC.111375 HWY 277, BURKBURNETTUNKNOWN 7/17/96 2 , 2A E,QRIYAZ S JUMA 094290 701 EASTSIDE DR, WICHITA FALLSGASOLINE 11/9/89 2 , 2A E,QRON LANEY OIL CO 111469 220 N BIRCH, MUNDAYGASOLINE, DIESEL 8/9/96 2 , 2A E,Q* SIMON ASSAD112449 HWY 287, WICHITA FALLSUNKNOWN 7/3/97 1B , 1A E,Q* SKYLINE DEVELOPERS112786 4599 SEYMOUR HWY, WICHITA FALLSGASOLINE 11/10/97 2 , 2A E,QSOUTHLAND CORP 092916 1000 HOLLIDAY ST, WICHITA FALLSUNKNOWN 5/3/89 2 , 2A E,QSOUTHLAND CORP 105794 2200 SOUTHWEST PKWY, WICHITA FALLSGASOLINE 11/16/92 2 , 2A E,QSOUTHLAND CORP 105796 1401 BROAD ST, WICHITA FALLSGASOLINE 11/16/92 2 , 2A E,QSOUTHLAND CORP 105797 2731 SOUTHWEST PKWY, WICHITA FALLSGASOLINE 11/16/92 2 , 5 E,QSOUTHWEST CONVENIENCE STORES 108421 2012 GRANT ST, WICHITA FALLSGASOLINE 7/19/94 2 , 2A E,Q* SOUTHWEST CONVENIENCE STORES111358 1204 JOHNSON ROAD, IOWA PARKUNKNOWN 7/15/96 2 , 2A E,QSTAR ENTERPRISE 097414 2700 SOUTHWEST PKWY, WICHITA FALLSGASOLINE 11/9/90 2 , 4 E,QSTAR ENTERPRISE 098088 3600 SHEPPARD ACCESS RD, WICHITA FALLS GASOLINE 2/26/91 2 , 6 E,QSTAR ENTERPRISE 101218 1201 BROAD ST, WICHITA FALLSGASOLINE 11/21/91 2 , 2A E,QSTAR ENTERPRISE 101959 918 SHEPPARD RD, BURKBURNETTGASOLINE 12/11/91 2 , 2A E,QSTAR ENTERPRISE 101974 1015 HOLLIDAY ST, WICHITA FALLSGASOLINE 12/11/91 2 , 2A E,QSTAR ENTERPRISE 102137 1136 RED RIVER EXWY, WICHITA FALLSGASOLINE 12/19/91 2 , 6 E,QSTAR ENTERPRISE 103408 2515 5TH ST, WICHITA FALLSGASOLINE 2/11/92 2A , 6 E,QSTAR ENTERPRISE 103598 4601 SOUTHWEST PKWY, WICHITA FALLSGASOLINE 12/5/91 2 , 6 E,QTXDOT 101614 1601 SOUTHWEST PKWY, WICHITA FALLSGASOLINE, DIESEL 12/4/91 2 , 2A E,QULTRAMAR DIAMOND SHAMROCK 096518 513 SHEPPARD RD, BURKBURNETTGASOLINE 8/13/90 2 , 2A E,QUNKNOWN 091536 MAURINE, WICHITA FALLSGASOLINE 10/1/87 2 , 5 E,QUNKNOWN 095589 CALL FIELD, WICHITA FALLSGASOLINE 4/16/90 2A , 2A E,QWEST LANE 104620 524 INDIANA, WICHITA FALLSGASOLINE 9/8/92 2 , 2A E,QWICHITA OIL CO 093683 1723 5TH, WICHITA FALLSGASOLINE 9/14/89 2 , 2A E,QWICHITA OIL CO 106809 3606 KEMP BLVD, WICHITA FALLSDIESEL 5/25/93 2A , 1A E,Q* WICHITA OIL CO111576 1135 CENTRAL FWY, WICHITA FALLSGASOLINE 7/4/96 1B , 1A E,QWYMAN JONES (MRS) 111722 1013 BROOK, WICHITA FALLSGASOLINE 7/12/96 1B , 1A E,Q* AYRES OIL CO112187 2900 EXWY, VERNONGASOLINE, DIESEL 3/14/97 2 , 2A E,Q* AYRES OIL CO112275 824 MAIN, VERNONGASOLINE 4/24/97 2 , 2A E,QBARTLETT DISTRIBUTING CO INC 102041 2701 WILBARGER ST, VERNONGASOLINE 1/30/92 2 , 2A E,QBOYD SETH 102788 N HWY 283, VERNONGASOLINE 3/26/92 5B , 6 E,QFARMERS COOP GIN & ELEVATOR 105397 HWY 70, VERNONGASOLINE 11/2/92 2 , 2A E,Q* GROZIER & MANN111464 3201 SEYMOUR HWY, WICHITA FALLSGASOLINE 8/5/96 1B , 1A E,QGROZIER & MANN 111466 1801 S FRONTAGE RD, VERNONGASOLINE 8/6/96 2 , 2A E,QGROZIER & MANN OIL COMPANY 098771 3103 WILBARGER, VERNONGASOLINE, DIESEL 4/25/91 2 , 2A E,QGROZIERS & MANN 111562 925 MAIN ST, VERNONGASOLINE 8/23/96 2 , 2A E,QJIM CHRISTANELLI FORD INC 096740 2801 WILBARGER, VERNONGASOLINE 9/12/90 2 , 2A E,Q* K C OIL CO112140 2701 FRONTAGE RD, VERNONUNKNOWN 3/3/97 2 , 2A E,QO K CONCRETE 105989 1628 N FRONTAGE RD, VERNONGASOLINE 1/26/93 2 , 2A E,QOSBORNE DIST CO INC 096739 122 WILBARGER ST, VERNONGASOLINE 9/11/90 1B , 1A E,QPORTER WALKER OIL CO 106595 1129 MAIN ST, VERNONGASOLINE 4/28/93 2 , 2A E,QTEXAS DEPT MENTAL HEALTH & M R 102538 4730 COLLEGE, VERNONGASOLINE 3/11/92 2A , 1A E,QTNRCC - 180

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236WILLACYMSWPSTWILLIAMSONENF/WSTPCD/ENFPCD/VCPSTCITY OF RAYMONDVILLE: MW-13, 14, AND 16. MSW00189 2.8 MI. W OF US 77, 3.9 MI. N OF SH 186,TOC AND Cl. 10/1/91 2A , 2B E,Q,V,2RAYMONDVILLE, TX.CARROLL PETROLEUM CO 091887 EXPWY 77, RAYMONDVILLEUNKNOWN 5/16/88 2 , 2A E,QCARROLL PETROLEUM CO 095840 304 S 7TH ST, RAYMONDVILLEGASOLINE 6/14/90 2 , 2A E,QCITY OF RAYMONDVILLE 103802 N 5TH ST, RAYMONDVILLEGASOLINE 7/13/92 2 , 6 E,Q* J & E OIL CO112653 858 E HIDALGO, RAYMONDVILLEGASOLINE 9/12/97 1B , 1A E,QPHILLIPS PROPERTIES INC 101183 HWY 77, SEBASTIANGASOLINE 12/12/91 2 , 2A E,QTEXAS METAL FINISHING (FLAME TECH) 52028 5000 SUNRISE ROAD, ROUND ROCKHEXAVALENT CHROMIUM 3/4/94 3 , 1 ECARQUEST AUTO PARTS 72731 909 AUSTIN AVE., GEORGETOWN, TXPHENOLS,BTEX,TPH,METALS 3/1/93 2A , 2B E* ROUND ROCK EAST SHOPPING CENTER409 200-404 WEST TAYLOR AVENUE, ROUND ROCK CHLORINATED SOLVENTS 11/27/96 0 , 5 EBONNET RESOURCES CORP 097837 115 E BAGHDAD AVE, ROUND ROCKGASOLINE 1/28/91 2 , 3 E,QCIRCLE K CORP 107992 13621 RR 620, AUSTINGASOLINE 8/3/93 2 , 2A E,QCUTCO, INC. 102199 1700 N MAIN ST, TAYLORGASOLINE 3/11/92 2 , 2A E,QDIAMOND SHAMROCK REF & MKTG CO 091351 602 S BELL, CEDAR PARKUNKNOWN 6/11/87 2 , 2A E,QDON HEWLETT CHEVROLET 111065 901 S MAIN, GEORGETOWNGASOLINE, DIESEL 5/16/96 2 , 2A E,QEDDIE HOPPE 105258 2400 N IH--35, ROUND ROCKGASOLINE 11/10/92 2A , 6 E,QFAUGHT & DEES LEASING 096954 211 W 8TH, GEORGETOWNGASOLINE 10/15/90 2 , 6 E,QFDIC 099155 N HWY 95, TAYLORGASOLINE, DIESEL 6/5/91 2A , 2A E,QGMAC 099129 5029 S IH--35, GEORGETOWNWASTE OIL 5/31/91 2A , 6 E,QLINDELL INC 098202 501 N MAIN ST, TAYLORGASOLINE 3/8/91 2A , 4 E,Q* LINDELL INC112253 SHAW, TAYLORGASOLINE, DIESEL 4/8/97 2 , 2A E,QMCNEIL CONSUMER PRODUCTS 109749 4001 N IH-35, ROUND ROCKDIESEL 8/3/95 2 , 2A E,QMETRO FUELS, INC. 091629 1911 S AUSTIN AVE, GEORGETOWNDIESEL 12/1/87 2 , 2A E,QMETRO SUPPLIERS 095684 1740 N MAYS, ROUND ROCKGASOLINE 4/4/90 2 , 6 E,Q* METRO SUPPLIES INC112309 1202 AUSTIN AVE, GEORGETOWNUNKNOWN 5/13/97 2 , 2A E,QMR. TOMMY MOORE 095954 HWY 95, GRANGERGASOLINE 5/21/90 2 , 2A E,QNATIONS BANK 100991 624 AUSTIN AVE, GEORGETOWNGASOLINE, DIESEL 11/22/91 2 , 2A E,QREALTY ALLIANCE OF TEXAS LTD 094527 1121 S AUSTIN AVE, GEORGETOWNGASOLINE 1/5/90 2 , 2A E,QROGERS OIL CO 099483 703 N MAIN ST, TAYLORWASTE OIL 7/3/91 2 , 2A E,QRUSSELL MCCREARY 100248 601 N MAIN, TAYLORGASOLINE, WASTE OIL 9/17/91 5B , 2A E,QSOUTHLAND CORP 091505 2403 ANDICE RD, GEORGETOWNGASOLINE 10/17/87 2 , 4 E,QSOUTHLAND CORP 097447 1801 S MAYS, ROUND ROCKGASOLINE 12/5/90 2 , 2A E,QSOUTHLAND CORP 106895 1909 HERMITAGE RD, ROUND ROCKGASOLINE 7/1/93 2 , 5 E,QSOUTHWESTERN BELL TELEPHONE CO 107749 12213 ROXIE DR, AUSTINGASOLINE 9/20/93 2 , 2A E,QSTAR ENTERPRISE 104338 602 N BELL, CEDAR PARKGASOLINE 6/24/92 2 , 2A E,Q* STARTEX PETROLEUM INC112383 712 ROUND ROCK AVE, ROUND ROCKGASOLINE, DIESEL 6/6/97 2 , 2A E,QSTRASBURGER ENTERPRISES INC 103115 409 W TAYLOR AVE, ROUND ROCKWASTE OIL, GASOLINE 5/12/92 2 , 2A E,QUNKNOWN 091815 500 TALBOT, TAYLORDIESEL 4/18/88 5B , 1A E,QVAL SMITH PETROLEUM 110294 301 HOLLY ST, GEORGETOWNGASOLINE, DIESEL 10/6/94 2 , 2A E,QVAL SMITH PETROLEUM CO 094831 IH-35, JARRELLGASOLINE 2/1/90 2A , 6 E,QTNRCC - 181

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236WILLIAMSONPSTWUDWILSONPSTWINKLERPSTWISEWOODPSTPCD/CAPST* WAG-A-BAG, INC.111985 1250 PALM VALLEY BLVD., ROUND ROCKUNKNOWN 12/11/96 2 , 2A E,QWILLIAMSON CO PCT 2 100042 W HWY 1869, LIBERTY HILLGASOLINE, DIESEL 8/26/91 2 , 2A E,QWOLF'S CHEVRON AGENCY 096948 FM 1331, CIRCLEVILLEGASOLINE 9/5/90 2 , 2A E,QROUND ROCK, CITY OF 2460003 WELL 7 (G2460003G) - SPRING STREET IN THE CITY MERCURY 5/1/95 2D , 6 E,Q,V,2OF ROUND ROCKBENNY COPE OIL CO 097060 229 CHIHUAHUA, LA VERNIAGASOLINE, DIST F OIL 10/19/90 2 , 2A E,QWEHMAN INC 107225 919 10TH ST, FLORESVILLEGASOLINE 7/2/93 2 , 2A E,Q* WYATTS SUPER C INC112288 HWY 87, LA VERNIAGASOLINE 4/28/97 1B , 1A E,Q* BROWNLEE WELL SERVICE095667 AUSTIN ST, KERMITGASOLINE 5/25/90 2 , 2A E,QE Z SERVE PETRO MARKETING CO. 094507 210 E HWY 302, KERMITGASOLINE 12/19/89 1B , 6 E,Q* WEST TEXAS GAS INC098043 1100 S POPLAR, KERMITGASOLINE, DIESEL 2/19/91 2 , 2A E,QWEST TEXAS GAS INC 098220 N HWY 115, WINKGASOLINE 2/19/91 2A , 6 E,Q* 97 CIRCLE S CONVENIENCE STORES112363 1409 W HALSELL, BRIDGEPORTGASOLINE 5/7/97 1B , 1A E,Q* 97 CIRCLE S CONVENIENCE STORES112366 HWY 114, BRIDGEPORTGASOLINE, DIESEL 5/8/97 2 , 6 E,QALVORD ISD 106328 MOSLEY LN, ALVORDWASTE OIL 3/5/93 2 , 2A E,QANTORA INC 102955 HWY 114, BRIDGEPORTGASOLINE, DIESEL 5/5/92 2 , 2A E,QBURTON OIL COMPANY 093081 HWY 114, BRIDGEPORTGASOLINE 5/18/89 1B , 1A E,Q* BURTON OIL COMPANY INC094898 HWY 114, BRIDGEPORTGASOLINE 1/26/90 2 , 2A E,Q* G & M CHEVRON099964 1210 HOVEY ST, BRIDGEPORTGASOLINE, DIESEL, KEROSENE 8/22/91 2 , 2A E,QHUDSON BUTANE CO INC 101260 HWY 101, BRIDGEPORTDIESEL 10/24/91 2 , 2A E,Q* JOE GILLESPIE107022 FM 730, BOYDGASOLINE 7/31/93 2 , 2A E,Q* MARTIN EAGLE OIL CO, INC.112190 600 HALE ST, DECATURUNKNOWN 3/18/97 2 , 2A E,QMITCHELL GAS SERVICES INC 110650 1405 CHICO HWY, BRIDGEPORTUNKNOWN 2/26/96 2 , 2A E,QTEXAS INDUSTRIES INC 093371 HWY 101, BRIDGEPORTGASOLINE 6/23/89 2 , 2A E,QTOM CARLTON 102990 1207 6TH ST, BRIDGEPORTGASOLINE, DIESEL 11/26/91 2 , 2A E,Q* TXDOT095970 HWY 281 @ LOOP 380, DECATURGASOLINE, DIESEL, WASTE OIL 6/13/90 2 , 2A E,Q* WISE COUNTY110314 200 N TRINITY, DECATURGASOLINE 1/18/96 2 , 2A E,QSCURLOCK PERMIAN CORP.3 52048 4701 S. LOOP, MONAHANSVARSOL SOLVENT 5/1/91 2B , 4 E* A S C CORP112230 823 S MAIN ST, WINNSBOROUNKNOWN 4/14/97 2 , 2A E,Q* ALLSION 7 SMITH INC112229 400 W BROADWAY, WINNSBOROGASOLINE 4/2/97 2 , 2A E,QDOZIER JIMMIE R 104688 501 S MAIN, QUITMANGASOLINE 9/18/92 2A , 1A E,QE Z MART STORES INC 103909 115 W PACIFIC, MINEOLAGASOLINE 7/17/92 2 , 2A E,QFIRST NATIONAL BANK 102689 HWY 11, WINNSBOROGASOLINE 4/16/92 2 , 2A E,Q* GREEN OIL CO106770 US HWY 80, HOARDDIESEL 4/27/93 2 , 2A E,Q* GREEN OIL CO107762 N HWY 14, HAWKINSGASOLINE 9/16/93 2 , 2A E,QH L RICHEY TRUCKING INC 106920 N HWY 14, HAWKINSDIESEL 7/6/93 2 , 6 E,QTNRCC - 182

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236WOODPSTYOAKUMPSTWUDHARGETT W J (RED) 094585 RT 1, HAWKINSGASOLINE 1/6/90 1B , 1A E,QJ M WHITTIKER 095591 FM 312, WINNSBOROGASOLINE 4/30/90 5B , 2A E,QJOE MOSELEY JR 105430 S MAIN, QUITMANGASOLINE 11/5/92 2 , 2A E,QPHILLIP WATTS 099205 501 W BROAD, MINEOLAGASOLINE 6/6/91 2 , 2A E,QQUITMAN CONSTRUCTION 107134 W HWY 154, QUITMANDIESEL 8/12/93 2 , 2A E,QTONYS AUTO & TRUCK REPAIR 096592 675 W BROAD ST, MINEOLAGASOLINE 8/23/90 2 , 6 E,QTXDOT 096232 E HWY 154, QUITMANGASOLINE 7/13/90 2 , 2A E,QTXDOT 100890 FM 564, MINEOLAGASOLINE 11/12/91 2A , 1A E,QV M OIL COMPANY 096438 300 E ELM ST, WINNSBORODIESEL 8/8/90 2 , 5 E,QWELLTECH INC 108108 607 W BROADWAY, WINNSBORODIESEL 4/26/94 2 , 2A E,QWILLIAMS OIL CO INC 095866 415 N WINNSBORO ST, QUITMANGASOLINE 6/11/90 2 , 2A E,QWILLIAMS OIL CO INC 098704 HWY 69, ALBAGASOLINE 4/19/91 2 , 6 E,QWOOD COUNTY NATIONAL BANK 098358 HWY 69, MINEOLAGASOLINE 3/25/91 2A , 2A E,QYOUNG OIL CO 095596 201 W BROAD ST, MINEOLAGASOLINE 5/21/90 2 , 2A E,QYOUNG OIL CO 098639 303 E BROAD, MINEOLAGASOLINE 3/28/91 2 , 2A E,QALLSUPS PETROLEUM, INC. 097563 HWY 214, DENVER CITYGASOLINE 10/15/90 2 , 2A E,QG & G TONG RENTAL 100615 HWY 214, DENVER CITYGASOLINE, DIESEL, WASTE OIL 10/10/91 2A , 6 E,QM & H WELL SERVICE 110159 W HWY 83, DENVER CITYDIESEL 12/6/95 2 , 2A E,QRIO GRANDE DISTRIBUTORS INC 109483 101 W BROADWAY, DENVER CITYGASOLINE 4/21/95 2 , 2A E,Q* RIP GRIFFIN TRUCK SERVICE INC112498 208 10TH ST, PLAINSGASOLINE 7/16/97 2 , 2A E,QUNKNOWN 111633 115 S ADAMS, DENVERGASOLINE 9/25/96 1B , 1A E,QWEST TEXAS GAS INC 103399 102 ROSWELL RD, PLAINSGASOLINE, WASTE OIL 5/11/92 2 , 2A E,QDENVER CITY, CITY OF 2510001 WELL 11 (G2510001F) - SW END OF E-W AIRPORT ALKANES, PROPANES,RUNWAY, NW OF DENVER CITYCYCLOPENTANE, THIPOPHENE,SEC-BUTYL BENZENE1/25/95 2C , 5 E,Q,V,2YOUNGPSTA B CORNELIUS 106434 1100 S ELM ST, GRAHAMGASOLINE 4/5/93 2 , 2A E,Q* CHAMBLES OIL CO112642 1516 E 4TH, GRAHAMGASOLINE, DIESEL 9/22/97 1B , 1A E,QCIRCLE K BANKRUPTCY 109408 1001 S HWY 16, GRAHAMGASOLINE, DIESEL 4/26/95 2 , 2A E,QCIRCLE K STORES INC 110896 1101 4TH ST, GRAHAMGASOLINE 4/11/96 2 , 2A E,QDOWELL SCHLUMBERGER INC 093369 1004 LOUIS ST, GRAHAMGASOLINE 6/28/89 2 , 2A E,Q* E Z SERVE INC111690 1022 W MAIN, OLNEYGASOLINE 9/18/96 2 , 2A E,QFFP OPERATING PARTNERS 091883 1106 BUNGER RD, GRAHAMGASOLINE 5/17/88 2 , 2A E,Q* FFP OPERATING PARTNERS108967 1202 W MAIN, OLNEYGASOLINE 10/21/94 2 , 2A E,QFFP OPERATING PARTNERS 109130 1041 E 4TH ST, GRAHAMGASOLINE 2/9/95 2 , 2A E,Q* FRED GARRISON OIL CO INC112238 214 PLUME STREET, GRAHAMGASOLINE 4/4/97 2 , 2A E,Q* GARRISON INC112401 220 ELM ST, GRAHAMGASOLINE 6/11/97 2 , 2A E,QGRAHAM SUPPLY CO 097641 825 6TH ST, GRAHAMGASOLINE 12/28/90 2A , 1A E,QK & S PETROLEUM CO 111823 912 ELM ST, GRAHAMGASOLINE 11/23/96 2 , 2A E,QPIERCE PETROLEUM PRODUCTS INC 094997 301 W MAIN, OLNEYGASOLINE 3/5/90 2 , 2A E,Q* PIERCE PETROLEUM PRODUCTS INC112577 2819 S HWY 16, GRAHAMGASOLINE 8/26/97 2 , 2A E,Q* PIERCE PETROLEUM PRODUCTS INC112584 931 4TH ST, GRAHAMGASOLINE 8/26/97 2 , 2A E,QTHRIFTWAY MARKETING CO 111824 926 ELM ST, GRAHAMUNKNOWN 10/31/96 1B , 1A E,QUNKNOWN 095564 ELM ST, GRAHAMGASOLINE 5/16/90 5B , 2A E,QTNRCC - 183

TABLE 1GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS NATURAL RESOURCE CONSERVATION COMMISSIONCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONCONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATAQUALITYSECTION5.236YOUNGZAVALAPSTPST* WESTERN MARKETING111629 323 ELM ST, GRAHAMGASOLINE 5/22/97 2 , 2A E,QDEL MONTE FOODS INC 102011 FM 393 RD, CRYSTAL CITYDIESEL 2/18/92 2 , 2A E,QFRED BURNS DIST CO 094969 1001 N 1ST ST, CRYSTAL CITYGASOLINE 2/14/90 2 , 2A E,Q* J & E OIL112569 1900 N HWY 83, CRYSTAL CITYGASOLINE 8/20/97 1B , 1A E,Q__________________________________________________________________________________________________________________________________________________________________________________SUMMARY__________________________________________________________________________________________________________________________________________________________________________________TOTAL NUMBER OF GROUND WATER CONTAMINATION CASES % OF TNRCC TOTAL % OF REPORT TOTAL------------------------------ ---------------------------------PETROLEUM STORAGE TANK DIVISION (PST): --------------------------------------- 6338 86.1 % 85.0 %POLLUTION CLEANUP, SUPERFUND (PCD): ------------------------------------------- 655 8.9 % 8.8 %ENFORCEMENT DIVISION/WASTE SECTION (ENF/WST): ------------------------- 178 2.4 % 2.4 %INDUSTRIAL AND HAZARDOUS WASTE DIVISION (IHW): ------------------------- 78 1.1 % 1.1 %WATER PLANNING AND ASSESSMENT DIVISION (WPA): ------------------------- 47 0.6 % 0.6 %MUNICIPAL SOLID WASTE DIVISION (MSW): ------------------------------------------ 26 0.4 % 0.4 %WATER UTILITIES DIVISION (WUD): ------------------------------------------------------ 24 0.3 % 0.3 %FIELD OPERATIONS DIVISION (FOD): ---------------------------------------------------- 11 0.2 % 0.2 %ENFORCEMENT DIVISION/WATER SECTION (ENF/WTR): ------------------------ 5 0.1 % 0.1 %-------- ------------- -------TOTAL NUMBER OF GROUND WATER CASES REGULATED BY THE TNRCC ------------------------------------- 7362 100.1 % 98.9 %TOTAL NUMBER OF COUNTIES WITH GROUND WATER CONTAMINATION CASES REGULATED BY THE TNRCC ---------------------------------- 236__________________________________________________________________________________________________________________________________________________________________________________TNRCC - 184

Figure 9. TNRCC Enforcement Status SummaryA Federal STATE/FED FUNDS 5 PCD-1 PCD-2 PCD-11 PCD-13 PCD-12 PCD-5 PCD-3B State PST-206 PST-95 PST-2 PST-8 PST-24A AG Office COURT/FED ACTION E 4 ENF-1 ENF-1 ENF-6 ENF-4 ENF-2 ENF-2 ENF-1B Federal NIHW-1 PCD-1 PCD-1 PCD-1FPCD-4WUD-1A PermitB Order EXECUTIVE ACTIONORCE 3 ENF-1 ENF-7 ENF-45 ENF-32 ENF-21 ENF-21 PCD-9C Exec Action MPCD-2 PCD-3 IHW-12 IGW-1 IHW-2 IHW-54D Fed Referral EPCD-32 PCD-25 MSW-1 PCD-29NPCD-19 WQD-5A Info RequestTENF-6 FOD- ENF-8 ENF-4 ENF-2 ENF-2 FOD-5B Plan Approval STAFF ACTION S 2 ENF-1 ENF-3 3 MSW-3 FOD-1 MSW-1 IHW-2 MSW-3C Notice of Contamination TPCD-7 MSW-1 IHW-1 PCD-23 MSW-2 PCD-11 PCD-3D Referred APCD-8 PCD-43 PST-135 PCD-19 PST-154 PST-1107TPST-373 PST-3447 WUD-2 PST-357 WUD-17 WUD-4UWQD-10SCONFIRMED-A Inspection STAFF DISCOVERY 1 ENF-2 ENF-2 IHW-2 ENF-2 PCD-2 PCD-1 FOD-1B Data Review PCD-6 PCD-25 MSW-2 PCD-2 PCD-2C Complaint PST-416 PCD-13 PST-14D Referral WQD-6 WQD-5A Voluntary Complianceand Notification VOLUNTARY 0 PCD-7 PCD-14 ENF-2 ENF-1 PCD-46 IHW-1 PCD-42B Voluntary Entrance into ACTION IHW-2 PCD-41 MSW-1Cleanup Program MSW-1 PCD-24PCD-138WQD-10 1 2 3 4 5 6ACTIVITY STATUSNo Activity Contamination Investigation Corrective Implement Monitor Action ActionConfirmed Action Planning Action Completed* * *A Action A Action A RemediationB No Action B No Action B Source RemovalC No Further Action NeededD Institutional ControlsE Engineering ControlsTNRCC-185

Table 2Railroad <strong>Commission</strong> of <strong>Texas</strong>Groundwater Contamination CaseDescription TableRCT-A

TABLE 2GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYRAILROAD COMMISSION OF TEXASEXPLANATION OF FIELDS----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------COUNTY:DIVISION:NEW CASES:FILE NAME:FILE NUMBER:LOCATION:CONTAMINATIONENFORCEMENTSTATUS:DATA QUALITY:THE COUNTY NAME IS THE FIRST ENTRY IN THE LEFT PORTION OF THE TABLE. IT IS LISTED ONLY ONCE FOR EACH GROUP OF CASES IN THAT COUNTY.THESE ARE THE SPECIFIC REGULATORY PROGRAMS WITHIN THE RAILROAD COMMISSION. DIVISIONS ARE LISTED ONLY ONCE FOR THEIR RESPECTIVE CASES IN EACHCOUNTY. SEE ACRONYM LIST (PAGE VI) FOR AGENCY AND DIVISION ABBREVIATIONS.AN ASTERISK IS PLACED IN EACH RECORD THAT IS REPORTED AS NEW FOR THIS YEAR.FILE NAMES REFLECT RESPONSIBLE PARTIES OR GEOGRAPHIC LOCATIONFILE NUMBERS ARE ASSIGNED ACCORDING TO RCT DISTRICT COMPLAINT NUMBERING SYSTEMS. SOME DISTRICTS INCLUDE THE YEAR IN THE COMPLAINT NUMBER. SOMECASES HAVE NO NUMBERS BECAUSE THE CASE WAS INITIATED BY INSPECTION OR SOME OTHER MANNER. A FEW CASES ARE CODED ACCORDING TO RCT HEARINGDOCKET NUMBER.LOCATION DESCRIPTORS VARY DEPENDING ON THE SCOPE OF THE INVESTIGATION AND WHETHER OR NOT THE COMPLAINANT'S PROPERTY IN ON AN OIL AND GASLEASE. THE INVESTIGATIONS THAT ARE NARROWER IN GEOGRAPHIC SCOPE ARE GENERALLY DESCRIBED SPECIFICALLY BY LEASE AND FIELD.NaCL-SODIUM CHLORIDE, TDS-TOTAL DISSOLVED SOLIDS, Cl-CHLORIDE, NG-NATURAL GAS, HCl-HYDROCHLORIC ACID. MOST CASES CITE SODIUM CHLORIDE ASCONTAMINATION. SOME CASES INVOLVE REFINED HYDROCARBONS, OTHERS CITE CHLORIDE BECAUSE CATIONS OTHER THAT SODIUM MAY BE PRESENT IN HIGHCONCENTRATION.ACTIONS AND NOTICES OF VIOLATION ARE TAKEN AT STAFF LEVEL AND MAY BE CONCURRENT. THE CLOSURE OR SHUT-IN OF FACILITIES AND PLUGGING OF WELLS MAYALSO BE DIRECTED AT STAFF LEVEL. STAFF DIRECTIVES ARE IDENTIFIED AS ENFORCEMENT STATUS 2. ACTIONS MAY BE STEPPED UP TO A FORMAL ENFORCEMENT LEVELWHICH CAN BE CATEGORIZED AS EXECUTIVE ACTION AND INCLUDE ADMINISTRATIVE PENALTIES AND ORDERS. IN SOME CASES, GROUNDWATER CONTAMINATION MAY BEDOCUMENTED BUT A SPECIFIC SOURCE OR AN ACTUAL RESPONSIBLE PARTY CANNOT BE INDENTIFIED. ENFORCEMENT STATUS WOULD BE CATEGORIZED AS STAFFDISCOVERY. ACTIONS OF RESPONSIBLE PARTIES WHO DISCOVER AND REPORT GROUNDWATER CONTAMINATION ARE CATEGORIZED AS VOLUNTARY ACTIONS EVENTHOUGH INVESTIGATIVE OR REMEDIAL PLANS ARE REVIEWED AND APPROVED BY THE OIL AND GAS DIVISION. SEE PAGES 23 - 32 FOR A DESCRIPTION OF THESE CODES.E - EPA APPROVED ANALYTICAL PROCEDURES,Q - QUALITY CONTROL PROGRAM ESTABLISHED FOR SAMPLING PROCEDURES,V - VERIFICATION OF CONTAMINATION THROUGH PROCEDURES LISTED BELOW:1. SPLITTING SAMPLES WITH REGULATED ENTITY OR OTHER AGENCY FOR COMPARISON OF ANALYSIS RESULTS2. RESAMPLING FOR VERIFYING ANALYSIS RESULTS3. SUPERVISORY OR COMMITTEE REVIEW OF SAMPLING PROCEDURES AND ANALYSIS RESULTSRCT - 1

TABLE 2GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYRAILROAD COMMISSION OF TEXASCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONENFOREMENTSTATUSCONTAMINATIONDESCRIPTIONDATAQUALITYAUSTINOIL & GASBEEOIL & GASBRAZORIAOIL & GASCARSONOIL & GASCLAYOIL & GASCOCHRANOIL & GASCOOKEOIL & GASCRANEOIL & GASCROCKETTOIL & GASCROSBYOIL & GASEASTLANDOIL & GASANONYMOUS COMPLAINT 03-2608 WOODLEY LEASE RACCOON BEND FIELD 2 4NaCl,E,Q,V,2CHESNUTT COMPLAINT 02-93-2173 4 MILES SW OF TULETA TULETA GAS PLANT-ENRON GAS 2 4HYDROCARB, COND, NG,E,Q,V,3OLD OCEAN GAS PLANT 2 MILES SOUTH OF OLD OCEAN OLD OCEAN FIELD 1D 4HYDROCARBON,E,Q,V,2WALT POLING VS UNKNOWN (FRANK 10-1378,10-1170 3 MILES SW OF FRITCH PANHANDLE, WEST FIELD 1C 1DRIP GAS OR COND.,E,Q,V,2SCHMITTON 9-95-4689 OLSEN LEASE (15360) DILLARD SE (ELLEN.) 1C 4NaCl, TDS,E,Q,V,2KATHY CARTER COMPLAINT 8A-0832 1/4 MILE SOUTH OF WHITEFACE LEVELLAND FIELD 2 5,Cl E,Q,V,2OXY USA - LEHMAN COMPRESSOR 5 MILES S OF LEHMAN LEVELLAND FIELD 1D 4,CONDENSATE E,Q,V,2CREED COMPLAINT 9-94-4352 4 MILES NW OF MUENSTER COOKE COUNTY REGULAR 5 3,NaCl E,Q,V,2* TOM DANGLEMYER COMPLAINT 9-97-5206 5 MILES S. OF MUENSTER DANGLE FIELD 2 3,NATURAL GAS E,Q,V,2BUTLER COMPLAINT 08-09558 10 MILES WEST OF CRANE, TX LEA (SAN ANDRES) FIELD 1C 2B,NaCl E,Q,V,2EDWARDS RANCH WATER FIELD 10 MILES SE OF MONAHANS SANDHILLS FIELD 0 5,NaCl E,Q,V,2* EMERALD UNDERGROUND WATER 7C-1961 25 MILES WEST OF OZONA CLARA COUCH FIELD 1C 5CRUDE OIL E,Q,V,2,RIVERA COMPLAINT 8A-3475 20 MILES NORTH OF POST FORBES (GLORIETTA) FIELD 1C 2B CHLORIDES E,Q,V,2,UNIDENTIFIED/HAGAN PROPERTY 7B-4581 8 MILES SOUTH OF CISCO HAGAN PROPERTY 1C 6B,NaCl E,Q,V,2* UNIDENTIFIED/PIONEER CITY 7B-4986 DOMESTIC WELLS IN/AROUND CITY OF PIONEER 1C 1,NaCl E,Q,V,2ECTOROIL & GASHEADLEE GAS PLANT 2 MILES EAST OF ODESSA HEADLEE FIELD 0 5CHROMIUM E,Q,V,2,RCT - 2

TABLE 2GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYRAILROAD COMMISSION OF TEXASCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONENFOREMENTSTATUSCONTAMINATIONDESCRIPTIONDATAQUALITYECTOROIL & GASGAINESOIL & GASGRAYOIL & GASHARRISOIL & GASHOCKLEYOIL & GASHOWARDOIL & GASHUTCHINSONOIL & GASJACKOIL & GASJACKSONOIL & GASJEFFERSONOIL & GASJONESOIL & GASSHELL TXL GAS PLANT GOLDSMITH, TEXAS GOLDSMITH FIELD 0 3FREE PHASE HC & BTEX,E,Q,V,2* ANON. VS ANERADA HESS 8A-3628 2 MILES NW OF SEMINOLE SEMINOLE (SAN ANDRES) FLD 1C 3,NATURAL GAS E,Q,V,2WARDSWELL DRAW AREA WARDSWELL DRAW NEAR SEMINOLE FIELD 0 3,NATURAL GAS E,Q,V,2* RUBY GAGE COMPLAINT 10-14342 MILES SW OF PAMPA PANHANDLE, GRAY COUNTY FLD 1C 1CHLORIDE,E,Q,V,2ANDREW GEORGE 03-4537 0.5 MILE SOUTH OF CYPRESS CYPRESS FIELD 2 3,NATURAL GAS E,Q,V,2HARRINGTON & TODD COMPLAINT 03-4478 10 MILES NE OF HOUSTON DYERSDALE FIELD 1C 3,NaCl & TDS E,Q,V,2MOBIL MALLET UNIT 5 MILES W OF SUNDOWN SLAUGHTER FIELD 0 2B,HYDROCARBONS E,Q,V,2RATLIFF COMPLAINT 8A-3405 2 MILES SOUTH OF SUNDOWN SLAUGHTER FIELD 1C 2B,CHLORIDES E,Q,V,2SLAUGHTER GAS PLANT 4 MILES W OF SUNDOWN SLAUGHTER FIELD 0 5,NATURAL GAS E,Q,V,2COSDEN PIPELINE CO. 1 MILE E OF COAHOMA 0 4,CRUDE OIL E,Q,V,2HAMBY COMPLAINT 08-3015 6 MI S OF I-20 ON SNYDER FLD RD SNYDER FIELD 1C 2B,CHLORIDES E,Q,V,2HODNETT COMPLAINT 08-3427 2 MILES NORTH OF VINCENT UNKNOWN FIELD 1C 1,CRUDE OIL E,Q,V,2RANGER GATHERING CORP. 1 MILE E OF LAKE MEREDITH REC. PANHANDLE, WEST FIELD 2 3NAT. GAS CONDENSATE,E,Q,V,2* RANGER GATHERING CORP. R-5 NO. 10-58 1 MILE SOUTH OF SANFORD PANHANDLE, WEST FIELD 0 1BENZ. & FREE PHASE HC,E,Q,V,2TEXAS UTILITIES FUEL CO. 4 MILES SOUTH OF BRYSON BRYSON COMP. STA. 0 4TRIETHYLENE GLYC,,E,Q,V,2LEE HAMONS 2 MILES SW OF GANADO GANADO, WEST FIELD 1D 2B BRINE (Cl, TDS),E,Q,V,2UNOCAL 24 MILES SW OF PORT ARTHUR BIG HILL FIELD 0 3CHLORIDES IN GW E,Q,V,2,CHARLENE VINSON COMPLAINT 7B-2657 6 MILES N.E. OF MERKEL VINSON PROPERTY 5 3OIL E,Q,V,2,RCT - 3

TABLE 2GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYRAILROAD COMMISSION OF TEXASCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONENFOREMENTSTATUSCONTAMINATIONDESCRIPTIONDATAQUALITYKNOXOIL & GASLIVE OAKOIL & GASLUBBOCKOIL & GASMARTINOIL & GASMATAGORDAOIL & GASMIDLANDOIL & GASMONTAGUEOIL & GASMOOREOIL & GASNAVARROOIL & GASNOLANOIL & GASPANOLAOIL & GASPARKEROIL & GASPECOSOIL & GASSTAN WOJCIK COMPLAINT 09-94-4391 1 MILE SOUTH OF KNOX CITY 1C 2B NaCl,E,Q,V,2NUECES RIVER GAS PLANT-ARCO 1/4 MILE NORTH OF GEORGE WEST 0 4HYDROCARBONS,E,Q,V,2CITY OF LUBBOCK 8A-0690 1 MILE NORTH OF LUBBOCK EDMISSON (CLEARFORK) 2 5NaCl E,Q,V,2,PERM. BASIN UNDERGR. WATER DIST. 08-3168 5 MILES SE OF TARZAN SPRABERRY (TREND AREA) 1C 4NaCl,E,Q,V,2BILL ZIEGENHALS COMPLAINT 03-4810 3 MILES NW OF MIDFIELD ARCH FIELD 3 2B,NaCl, TDS E,Q,V,2DAVID SPENCER COMPLAINT 03-4088 F. PETTUS SURVEY A-73 SUGAR VALLEY FIELD 3 4,NaCl E,Q,V,2HENRY SEIFERT COMPLAINT 03-4782 7 MILES NW OF MARKHAM MARKHAM FIELD 1C 1,NaCl, TDS E,Q,V,2E. R. JACKSON COMPLAINT 08-1794 12 MILES SOUTH OF MIDLAND 1C 5CRUDE OIL,E,Q,V,2BOWIE GAS PLANT 09-89-679 3 MILES NE OF BOWIE 3B 5HYDROCARBON,E,Q,V,2COLORADO INTERSTATE GAS (BIVINS 168948 1/4 MILE NORTH OF MASTERSON PANHANDLE (RED CAVE) 0 2B VOL. ORG. COMPOUNDS,E,Q,V,2CITY OF CORSICANA ONE MILE EAST OF CORSICANA CORSICANA (SHALLOW) FIELD 5 6A HYDROCARBONS,E,Q,V,2ORYX ENERGY CO. 7B-2609 4 MILES NORTH OF MARYNEAL WESTLAKE PLANT 2 3HCl E,Q,V,2,OXY USA 3 MILES SSW OF CARTHAGE FORMER PANOLA GAS PLANT 0 5HYDROCARBONS/BENZ. E,Q,V,2,WESTERN RESERVES CORPORATION 7B-4199 3.5 MILES SOUTH OF MILSAP DILLON (STRAWN) FIELD 1C 3NaCl,E,Q,V,2* MONTE DUDLEY COMPLAINT 08-35855 MILES N OF FT. STOCKTON FT. STOCKTON FIELD 1C 1CRUDE OIL,E,Q,V,2RCT - 4

TABLE 2GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYRAILROAD COMMISSION OF TEXASCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONENFOREMENTSTATUSCONTAMINATIONDESCRIPTIONDATAQUALITYPECOSOIL & GASREAGANOIL & GASREFUGIOOIL & GASRUNNELSOIL & GASRUSKOIL & GASSAN PATRICIOOIL & GASSCURRYOIL & GASSHELBYOIL & GASSTEPHENSOIL & GASTERRYOIL & GASTEXAS-NEW MEXICO PIPELINE CO. 5 MILES N OF FORT STOCKTON GOMEZ FIELD 0 4,CRUDE OIL E,Q,V,2* WILLIAMS RANCH 08-359210 MILES SW OF FT. STOCKTON BELDING FIELD 1C 1,SULFATES E,Q,V,2EXXON PIPELINE CO. 4 MILES WEST OF BIG LAKE BIG LAKE (WEST) 1D 4,CRUDE OIL E,Q,V,2* PARKER & PARSLEY DEVELOPMENT, L. 7C-1788 35 MI N OF BIG LAKE HWY. 137 SPRABERRY (TREND AREA) 1C 6C,SALT WATER E,Q,V,2SANTA RITA WATER DISTRICT 7C-1849 18 MILES NE OF BIG LAKE SPRABERRY (TREND AREA) 1D 4,CRUDE OIL E,Q,V,2SANTA RITA WATER DISTRICT 7C-1910 42 MILES NW OF BIG LAKE SPRABERRY (TREND AREA) 1D 4,NATURAL GAS E,Q,V,2EXXON COMPANY, U.S.A. EXXON'S TOM O'CONNOR GAS TOM O'CONNOR FIELD 0 4NATURAL GAS LIQUID,E,Q,V,2DESANA CORP. BLOWOUT PROBL. 3 MILES SOUTH OF WINTERS VARIOUS WINTERS FIELDS 5 5NAT. GAS, CRUDE, SW,E,Q,V,2RICK MINZENMAYER COMPLAINT 7C-1414 3 MILES N OF BALLINGER BALLINGER FIELD 5 5NaCl,E,Q,V,2* TRACER ENERGY, INC.1/2 MILE W OF BALLINGER BALLINGER FIELD 0 3HIGH CHLORIDES,E,Q,V,2WORKMAN COMPLAINT 7C-1432 1/4 MILE E HATCHEL BALLINGER & ELM CREEK FIELDS 5 5NaCl,E,Q,V,2HARRIS COMPLAINT 06-1107 1 MILE E OF OVERTON EAST TEXAS FIELD 1C 5NaCl E,Q,V,2,BENNIE CRAFT COMPLAINT 04-0710 5 MI N OF CORPUS CHRISTI ANGELITA, NEW FIELD 1C 4CRUDE OIL,E,Q,V,3ANITA BENZ COMPLAINT 8A-1073 3 MILES WEST OF SNYDER KELLY-SNYDER FIELD 2 5,CRUDE OIL E,Q,V,2BURL BELEW COMPLAINT 8A-0843 1/2 MILE WEST OF FLUVANNA FLUVANNA FIELD 3 5,CRUDE OIL E,Q,V,2DIAMOND "M" GAS PLANT 12 MILES WEST OF SNYDER DIAMOND "M" FIELD 3 5,HYDROCARBON E,Q,V,2JACK MARTIN COMPLAINT 8A-3277 8 MILES NORTH OF SNYDER KELLY-SNYDER FIELD 1C 2B,NaCl E,Q,V,2JOAQUIN FIELD BLOWOUT 1/4 MILE EAST OF JOAQUIN JOAQUIN FIELD 5 6C NATURAL GAS,E,Q,V,2FIRST NAT'L BANK OF ABILENE 13 MILES NE OF BRECKENRIDGE ELIASVILLE GAS PLANT 1C 4HYDROCARB CONDENSATE,E,Q,V,2SPUWCD COMPLAINT 8A-3344 8 MILES NW OF WELCH NYSTEL LEASE 1C 2A CHLORIDES E,Q,V,2,RCT - 5

TABLE 2GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYRAILROAD COMMISSION OF TEXASCOUNTYDIVISIONNEWCASESFILENAMEFILENUMBERLOCATIONENFOREMENTSTATUSCONTAMINATIONDESCRIPTIONDATAQUALITYVICTORIAOIL & GASWARDOIL & GASWHARTONOIL & GASWISEOIL & GAS* JEANSONNE COMPLAINT 2-97-2748 1 1/2 MILES WSW PLACEDO PLACID VALLEY SUBDIV. 1C 6C CHLORIDE, TDS,E,Q,V,2AMERICAN PROCESSING, L.P. 2 MILES SOUTH OF WICKETT, TX ESTES PLANT 0 5,HYDROCARB CONDENSATE E,Q,V,2LOCKRIDGE GAS PLANT 8 MILES SOUTH OF PYOTE LOCKRIDGE FIELD 0 3,HYDROCARBONS E,Q,V,2* MOERS COMPLAINT 3-50903 1/2 MILES S. OF WHARTON S. WHARTON FIELD 1C 6C NaCl, TDS,E,Q,V,2REX KEESE WATER WELL 5 MILES WSW OF DECATUR BOONSVILLE (BEND CONGL., 0 4NATURAL GAS,E,Q,V,2YOAKUMOIL & GASAMOCO PRENTICE GAS PLANT 7 MILES WEST OF SUNDOWN PRENTICE FIELD 0 1,HYDROCARBON E,Q,V,2SHELL DENVER CITY PLANT 8A-0139 R-3 3 MILES NORTH OF DENVER CITY WASSON FIELD 0 3,CHLORIDES E,Q,V,2WESTERN FRONT COMPLAINT 8A-3197 DENVER CITY WASSON FIELD 1C 6C,NaCl E,Q,V,2_________________________________________________________________________________________________________________________________________________________________________________________SUMMARY_________________________________________________________________________________________________________________________________________________________________________________________% OF REPORT TOTAL---------------------------------TOTAL NUMBER OF GROUNDWATER CONTAMINATION CASES REGULATED BY THE RAILROAD COMMISSION OF TEXAS -OIL AND GAS DIVISION--------------77 1.0TOTAL NUMBER OF COUNTIES WITH GROUNDWATER CONTAMINATION CASES REGULATED BY THE RCT_______________________________________49TOTAL NUMBER OF NEW CASES_______________________________________________________________________________________________________12TOTAL NUMBER OF CASES WHICH WERE REFERRED FROM OTHER AGENCIES TO THE RCT FOR THE 1997 REPORT______________________________0TOTAL NUMBER OF CASES FROM THE 1996 REPORT WHICH WERE DROPPED FROM THE 1997 REPORT_________________________________________7TOTAL NUMBER OF CASES FROM THE 1997 REPORT FOR WHICH THE ENFORCEMENT STATUS CHANGED______________________________________10RCT - 6

Figure 11. RCT Enforcement Status SummaryA Federal STATE/FED FUNDS 5 2 3 2B StateA AG Office COURT/FED ACTION E 4B FederalA PermitB Order EXECUTIVE ACTIONNFORCE 3 1 1 3C Exec ActionD Fed ReferralA Info RequestMENTB Plan Approval STAFF ACTION S 2 4 2 3C Notice of ContaminationD ReferredCONFIRMED-TATUSA Inspection STAFF DISCOVERY 1 7 8 3 9 3 5B Data ReviewC ComplaintD ReferralA Voluntary Complianceand Notification VOLUNTARY ACTION 0 2 2 6 6 5B Voluntary Entrance intoCleanup Program0 1 2 3 4 5 6ACTIVITY STATUSNo Activity Contamination Investigation Corrective Implement Action Monitor Action ActionConfirmed Action Planning Completed* * *A Action A Action A RemediationB No Action B No Action B Source RemovalC No Further Action NeededD Institutional ControlsE Engineering ControlsRCT-7

Table 3<strong>Texas</strong> Alliance of Groundwater DistrictsGroundwater Contamination CaseDescription TableTAGD-A

TABLE 3GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS ALLIANCE OF GROUNDWATER DISTRICTSEXPLANATION OF FIELDS--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------COUNTY:THE COUNTY NAME IS THE FIRST ENTRY IN THE LEFT PORTION OF THE TABLE. IT IS LISTED ONLY ONCE FOR EACH GROUP OF CASES IN THATCOUNTY.DISTRICT: THE SECOND ENTRY FROM THE LEFT IS THE DISTRICT NAME. IT IS LISTED ONLY ONCE FOR EACH COUNTY. DISTRICT ABBREVIATIONS: BS/EACD -BARTON SPRINGS/EDWARDS AQUIFER CONSERVATION DISTRICT, EUWCD - EVERGREEN UNDERGROUND WATER CONSERVATION DISTRICT,NEW CASES:FILE NAME:FILE NUMBER:LOCATION:CONTAMINATIONDESCRIPTION:DATE:ENFORCEMENTSTATUS:DATA QUALITY:AN ASTERISK IS PLACED IN THIS FIELD FOR EACH CASE THAT WAS NOT IN THE REPORT THE PREVIOUS YEAR.FILE NAMES REFLECT GEOGRAPHIC LOCATION, RESPONSIBLE PARTY, OR CONTAMINATED WELLS.FILE NUMBERS ARE ASSIGNED BY THE DISTRICT. BS/EACD FILE NUMBERS REFLECT STATE AND DISTRICT WELL INDENTIFICATION NUMBERS.CITY NAME AND ADDRESS ARE GIVEN WHERE AVAILABLE, CORRESPONDING USGS TOPOGRAPHIC MAP REFERENCE IS SOMETIMES PROVIDED.PET - PETROLEUM, ALUMIN - ALUMINUMDATE INVESTIGATION WAS BEGUN.ENFORCEMENT STATUS CODES ARE COMPLETED BY THE DISTRICTS. SEE PAGES 29-47 FOR A COMPLETE DESCRIPTION OF THESE CODES.E - EPA APPROVED ANALYTICAL PROCEDURESQ - QUALITY CONTROL PROGRAM ESTABLISHED FOR SAMPLING PROCEDURESV - VERIFICATION OF SAMPLING THROUGH PROCEDURES LISTED BELOW:1. SPLITTING SAMPLES WITH REGULATED ENTITY OR OTHER AGENCY FOR COMPARISON OF ANALYSIS RESULTS2. RESAMPLING FOR VERIFYING ANALYSIS RESULTS3. SUPERVISORY OR COMMITTEE REVIEW OF SAMPLING PROCEDURES AND ANALYSIS RESULTSTAGD - 1

TABLE 3GROUNDWATER CONTAMINATION CASE DESCRIPTIONS BY COUNTYTEXAS ALLIANCE OF GROUNDWATER DISTRICTSCOUNTYDISTRICTNEWCASESFILE NAME FILE NUMBER LOCATION CONTAMINATIONDESCRIPTIONDATEENFORCEMENTSTATUSDATA QUALITYTRAVISBS/EACDWILSONEUWCDCOLD SPRINGS 58-42-916 COLORADO RIVER ARSENIC, ALUMIN., FECAL COLIFORM 1994 1B,2D , 0ECOOK-WALDEN 58-50-1CW1 HYW 290 PET. HYDROCARBONS, LEAD 1994 1A,2D , 2H. BESSE 58-50-2HB OAKDALE DR. SEDIMENT, ALUMIN. 1994 1B,2D , 0EH.E. BRODIE 58-50-2NB2 LOOP 360 SEDIMENT/TOLUENE 1993 1B,2D , 0E,V1H.E. BRODIE 58-50-2NB3 LOOP 360 SEDIMENT 1993 1B,2D , 0HERNDON 58-50-502 MANCHACA RD. BACTERIA 1994 1A , 0EMAIN BARTON SPRING 58-42-913 ZILKER PARK SEDIMENT, BACTERIA 1990 1B , 2MANCHACA SPRING 58-58-205 OLD SAN ANTONIO ROAD BACTERIA 1994 1A,2C , 2E,QMAXEY 58-50-2EM STEARNS RD. ARSENIC, ALUMIN. 1994 1A,2C , 3EOAKHILL SUBSTATION 58-50-2COA HWY 290 AT JOE TANNER LANE PETROLEUM HYDROCARBONS, LEAD, 3/06/93 1B , 0EMERCURYOLD MILL SPRINGS 58-42-922 ZILKER PARK PET. HUDROCARBON, LEAD 1994 1A,2D , 2E,V2RABB WELL 58-42-915 RABB ROAD PETROLEUM HYDROCARBONS 7/01/93 2C,2D , 1B E,QSUNSET VALLEY #1 58-50-221 JONES RD. SEDIMENT 1993 1A , 2SUNSET VALLEY #2 58-50-222 JONES RD. SEDIMENT 1993 1A , 2SUNSET VALLEY #3 58-50-223 LONE OAK TR SEDIMENT 1990 1B , 2USGS BRODIE MW 58-50-217 LOOP 360 SEDIMENT 1993 1A , 2WOLF NURSERY 58-50-2WN HWY 290, 0.7 MILES WEST OF LOOP 360 PETROLEUM HYDROCARBONS 10/01/93 2C , 1A E,Q* POLK FEED #2 58-50-1P2 HWY 290 PETROLEUM HYDROCARBONS 1997 1A , 1A E,Q* WILSON 58-50-2CW SUNSET VALLEY BACTERIA, PETROLEUMHYDROCARBONS1997 1A , 1A E,QKOCH INDUSTRIES, INC.6 MILES NORTHWEST OF FLORESVILLEEAST OF US 181GASOLINE, DIESEL FUEL, JET FUEL 3/15/92 2C , 4E,Q,V,2________________________________________________________________________________________________________________________________________________________________________________SUMMARY________________________________________________________________________________________________________________________________________________________________________________TOTAL NUMBER OF CONTAMINATION CASES REPORTED BY THE TEXAS ALLIANCE OF GROUNDWATER DISTRICTS: BS/EACD - 19EUWCD - 1 % OF REPORT TOTAL--------------------- ------------------------------TOTAL ---------------- 20 0.3 %TOTAL NUMBER OF COUNTIES WITH CONTAMINATION CASES REPORTED BY THE TEXAS ALLIANCE OF GROUNDWATER DISTRICTS ------------------------ 2TOTAL NUMBER OF NEW CASES --------------------------------------------------------------------------------------------------------------------------------------------------------------------- 2TOTAL NUMBER OF CASES WHICH WERE REFERRED TO OTHER AGENCIES FROM THE TAGD ------------------------------------------------------------------------------- 0TOTAL NUMBER OF CASES IN THE 1996 REPORT THAT WERE DROPPED FROM THE 1997 REPORT ------------------------------------------------------------------------- 0TOTAL NUMBER OF CASES FOR WHICH THE ENFORCEMENT STATUS HAS CHANGED ------------------------------------------------------------------------------------------- 0________________________________________________________________________________________________________________________________________________________________________________TAGD - 2

Figure 13. TAGD Enforcement Status SummaryA Federal STATE/FED FUNDS 5B StateA AG Office COURT/FED ACTION E 4B FederalA PermitB Order EXECUTIVE ACTIONNFORCE 3C Exec ActionD Fed ReferralA Info RequestB Plan Approval STAFF ACTIONMENTS 2 4 2 3 1 1C Notice of ContaminationD ReferredCONFIRMED-A Inspection STAFF DISCOVERYTATUS1 2 2 5B Data ReviewC ComplaintD ReferralA Voluntary Complianceand Notification VOLUNTARY ACTION 0B Voluntary Entrance intoCleanup Program0 1 2 3 4 5 6ACTIVITY STATUSNo Activity Contamination Investigation Corrective Implement Monitor Action ActionConfirmed Action Planning Action Completed* * *A Action A Action A RemediationB No Action B No Action B Source RemovalC No Further Action NeededD Institutional ControlsE Engineering ControlsTAGD-3

APPENDICESAppendix 1. <strong>Texas</strong> Groundwater Protection CommitteeMembers and RepresentativesAppendix 2. <strong>Texas</strong> GroundWater Protection PolicyAppendix 3. Groundwater Classification SystemAppendix 4. <strong>Texas</strong> Groundwater Protection CommitteeRulesAppendix 5. TNRCC Spill Prevention and Control RulesAppendix 6. District and Regional OfficesAppendix 7. Agency and District ContactsAppendix 8. Agency Central Records LocationsAppendix 9. Other Reports and PublicationsA-1

A-2

Appendix 1. <strong>Texas</strong> Groundwater ProtectionCommittee Members and RepresentativesChairman - <strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>Jeffrey Saitas, Executive Director<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>P.O. Box 13087Building F, Room 4210, MC 109Austin, <strong>Texas</strong> 78711-3087Ph. # (512) 239-3900 FAX # (512) 239-3939Designated ChairmanMary L. AmbroseWater Policy and Regulations Division<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>Building F, Room 433, MC 204Austin, <strong>Texas</strong> 78711-3087Ph. # (512) 239-4813 FAX # (512) 239-4808Vice Chairman - <strong>Texas</strong> Water Development BoardCraig D. Pedersen, Executive Administrator<strong>Texas</strong> Water Development BoardP.O. Box 13231Austin, <strong>Texas</strong> 78711-3231Ph. # (512) 463-7850 FAX # (512) 475-2053Designated Vice ChairmanPhil Nordstrom, Section HeadGroundwater Monitoring Unit<strong>Texas</strong> Water Development BoardP.O. Box 13231Austin, <strong>Texas</strong> 78711-3231Ph. # (512) 936-0838 FAX # (512) 936-0831A-3

MembersRailroad <strong>Commission</strong> of <strong>Texas</strong>Designated RepresentativeRichard GinnRailroad <strong>Commission</strong> of <strong>Texas</strong>P.O. Box 12967Austin, <strong>Texas</strong> 78711-2967Ph. # (512) 463-6796 FAX # (512) 463-6780<strong>Texas</strong> Department of HealthPatty PattersonInterim <strong>Commission</strong>er of Health<strong>Texas</strong> Department of Health1100 West 49th StreetAustin, <strong>Texas</strong> 78756Ph. # (512) 458-7375 FAX # (512) 458-7477Designated RepresentativeJohn A. Jacobi, D.P.E.Bureau of Environmental Health<strong>Texas</strong> Department of Health1100 West 49th StreetAustin, <strong>Texas</strong> 78754Ph. # (512) 834-6640 FAX # (512) 834-6707<strong>Texas</strong> Department of AgricultureLarry R. SowardDeputy <strong>Commission</strong>er<strong>Texas</strong> Department of AgricultureP.O. Box 12847Austin, <strong>Texas</strong> 78711Ph. # (512) 463-7567 FAX # (512) 463-1104AlternateDonnie DippelAssistant <strong>Commission</strong>er, Pesticide ProgramsPh. # (512) 463-1093 FAX # (512) 475-1618A-4

<strong>Texas</strong> State Soil and Water Conservation BoardRobert G. BuckleyExecutive Director<strong>Texas</strong> State Soil and Water Conservation BoardP.O. Box 658Temple, <strong>Texas</strong> 76503Designated RepresentativeJames MoorePh. # (817) 773-2250 FAX # (817) 773-3311<strong>Texas</strong> Alliance of Groundwater DistrictsScott Holland, President<strong>Texas</strong> Alliance of Groundwater DistrictsIrion County WCDP.O. Box 10Mertzon, <strong>Texas</strong> 76941Ph. # (915) 835-2015 FAX # (915) 835-2366Designated RepresentativeBill E. Couch, General ManagerBarton Springs/Edwards Aquifer Conservation District1124-A Regal RowAustin, <strong>Texas</strong> 78748Ph. # (512) 282-8441 FAX # (512) 282-7016<strong>Texas</strong> Agricultural Experiment StationEdward A. Hiler, Vice Chancellor, Dean, Agriculture and Life SciencesDirector, <strong>Texas</strong> Agricultural Experiment StationThe <strong>Texas</strong> A&M University SystemCollege Station, <strong>Texas</strong> 77843-2147Ph. # (409) 845-3713 FAX # (409) 862-1637Designated RepresentativeDr. Wayne R. Jordan, Director<strong>Texas</strong> Water Resource InstitutePh # (409) 845-1851 FAX # (409) 845-8554A-5

Bureau of Economic GeologyNoel Tyler, DirectorBureau of Economic GeologyThe University of <strong>Texas</strong> at AustinUniversity Station, Box XAustin, <strong>Texas</strong> 78713-7508Ph. # (512) 471-1534 or 471-7721 FAX # (512) 471-0140Designated RepresentativeAlan DuttonBureau of Economic GeologyUniversity of <strong>Texas</strong> at AustinUniversity Station, Box XAustin, <strong>Texas</strong> 78713-7508Ph. # (512) 471-5739 FAX # (512) 471-0140A-6

Appendix 2. <strong>Texas</strong> Groundwater Protection Policy(a) The legislature finds that:<strong>Texas</strong> Water Code, Section 26.401(1) in order to safeguard present and future <strong>groundwater</strong> supplies, usable and potentially usable<strong>groundwater</strong> must be protected and maintained;(2) protection of the environment and public health and welfare requires that <strong>groundwater</strong> be keptreasonably free of contaminants that interfere with present and potential uses of <strong>groundwater</strong>;(3) <strong>groundwater</strong> contamination may result from many sources, including current and past oil and gasproduction and related practices, agricultural activities, industrial and manufacturing processes,commercial and business endeavors, domestic activities, and natural sources that may be influenced byor may result from human activities;(4) the various existing and potential uses are important to the state economy; and,(5) aquifers vary both in their potential for beneficial use and in their susceptibility to contamination.(b) The legislature determines that consistent with the protection of the public health and welfare, thepropagation and protection of terrestrial and aquatic life, the protection of the environment, the operationof existing industries, and the maintenance and enhancement of the long-term economic health of thestate, it is the goal of <strong>groundwater</strong> policy in this state that the existing quality of <strong>groundwater</strong> not bedegraded. This goal of nondegradation does not mean zero-contaminant discharge.(c) It is the policy of this state that:(1) discharges of pollutants, disposal of wastes, or other activities subject to regulation by state agenciesbe conducted in a manner that will maintain present uses and not impair potential uses of <strong>groundwater</strong>or pose a public health hazard; and(2) the quality of <strong>groundwater</strong> be restored if feasible.(d) The legislature recognizes the important role of the use of the best professional judgment of theresponsible state agencies in attaining the <strong>groundwater</strong> goal and policy of this state.A-7

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Appendix 3. Groundwater Classification SystemPurposeBasisThe <strong>Texas</strong> Groundwater Protection Committee and its member agencies recognize that<strong>groundwater</strong> classification is an important tool to be used in the implementation of the<strong>groundwater</strong> policy contained in Section 26.401 of the <strong>Texas</strong> Water Code. Through classification,the <strong>groundwater</strong>s in the state can be categorized and protection or restoration measures can thenbe specified by member agencies according to the quality and present or potential use of the<strong>groundwater</strong>.Four classes are defined based on quality as determined by total dissolved solids content (Figure15). The names and concentration ranges are based on traditional nomenclature associated witheach class. Quality also determines usability, however, it is implicit in this classification that awater-bearing zone must be able to produce sufficient quantities of water to meet its intended use.The examples of use are intended to describe some of the common uses of these classes and arenot meant to be exclusive of other uses which might arise due to unusual circumstances orapplication of new technology such as desalinization.Application This <strong>groundwater</strong> classification system applies to all <strong>groundwater</strong>s in the state. In assigning aclassification, the member agencies shall endeavor to use the natural quality of the <strong>groundwater</strong>that is unaffected by discharges of pollutants from human activities.All usable and potentially usable <strong>groundwater</strong>s are subject to the same protection afforded thenondegradation policy goal of the <strong>Texas</strong> Water Code in Section 26.401. This section further states thatnondegradation does not mean zero-contaminant discharge. Starting with this nondegradation policygoal, protection or restoration measures can be varied according to the response level set by theclassification and guidance of this narrative so long as the following conditions are met:a) Current <strong>groundwater</strong> uses are not impaired;b) Potential <strong>groundwater</strong> uses are not impaired;c) A public health hazard is not created; andd) The quality of <strong>groundwater</strong> is restored if feasible.In determining protection or restoration measures, the member agencies should consider all beneficialuses to which <strong>groundwater</strong> of a given quality can currently or potentially be put. Generally, the use of<strong>groundwater</strong> requiring the highest degree of protection or restoration is human consumption as drinkingwater. Protection for this use will also be protective of all other current or potential uses in almost allcircumstances. The suitability of a zone for use as a human drinking water supply can be based on thequality and quantity of the water it contains as well as its ability to produce enough water to meet itsintended use. These considerations facilitate defining two response levels for purposes of assigningprotection or restoration measures that are commensurate with the potential to impact human health andthe environment.. Level I response for the fresh, slightly saline and moderately saline classes should be based on thecurrent or potential use as a human drinking water supply.A-9

. Level II response for the very saline to brine class should be based on indirect exposure (i.e., by meansother than drinking) or no human consumption.Evaluations In specifying a protection or restoration measure, member agencies must apply best professionaljudgement on a case-by-case basis. Evaluations to be made include but are not limited to suchfactors as yield, the availability of alternate sources of water, any background concentrations ofnaturally occurring constituents, the effects of constituents on usability, traditional and potentialbeneficial uses of the water, economic and technical feasibility of treatment and projected needsfor and types of impacts on these <strong>groundwater</strong>s. In instances where there is a likelihood ofhydrologic interconnection with resultant potential for contaminant movement from a given<strong>groundwater</strong> zone to a surface water body or other <strong>groundwater</strong> zones, protection andrestoration measures for that zone should be determined by the quality and current and potentialuse of the receiving waters.AdditionalFunctionsThis classification system is intended to be implemented by member agencies asan integral part of their <strong>groundwater</strong> quality programs. In addition to its response settingfunction, the classification system can also serve as a common basis among the variousprograms to foster consistency. It can also be used as a mapping tool to delineate specific areasin need of more detailed <strong>groundwater</strong> quality management. Towards this end, the Committeerecognizes the important contributions of all agencies that compile such data and supports thecontinuing efforts to enhance the statewide database.A-10

Figure 15. Groundwater Classification System<strong>Texas</strong> Groundwater Protection Committee - Groundwater Classification SystemCLASS QUALITY* EXAMPLES OF USE AGENCY RESPONSEFresh Zero to 1,000 Drinking and all other uses.Slightly More than 1,000 Drinking if fresh water is unavailable, livestockSaline to watering, irrigation, industrial, mineral extraction,3,000 oil and gas production.Level I Response:Protection or restorationmeasures based on current useas a human drinking watersupply.Moderately More than 3,000 Potential/future drinking and limited livestockSaline to watering and irrigation if fresh or slightly saline10,000 water is unavailable; industrial, mineral extraction,oil and gas production.Very Saline More than Mineral extraction, oil and gas production.to Brine 10,000Level II Response:Protection or restorationmeasures based on indirectexposure or no humanconsumption.* Concentration range of Total Dissolved Solids in milligrams per liter.

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Appendix 4. <strong>Texas</strong> Groundwater ProtectionCommittee RulesGeneral Provisions Relating toPublic Files and Joint Report<strong>Texas</strong> Administrative Code, §§601.1 - 601.5These sections are promulgated under the authority of <strong>Texas</strong> Water Code §26.406, which authorizes the<strong>Texas</strong> Groundwater Protection Committee to adopt any rules necessary to carry out its powers and dutiesunder Chapter 26 of the Water Code and to establish and approve general policy of the committee.§601.1. Purposes of Rules. The purpose of these sections is to implement duties and responsibilitiesassigned to the committee under <strong>Texas</strong> Water Code §26.406 relating to the maintenance by certain stateagencies of public files containing documented cases of <strong>groundwater</strong> contamination and the publication bythe committee, in conjunction with the commission, of annual <strong>groundwater</strong> monitoring and contamination<strong>report</strong>s and to establish general policies of the committee to guide such implementation.§601.2. Applicability. These rules specifically apply to each state agency having responsibilities relatedto the protection of <strong>groundwater</strong>, and include the <strong>Texas</strong> Water <strong>Commission</strong>, the <strong>Texas</strong> Water Well DrillersBoard, the <strong>Texas</strong> Department of Health, the Department of Agriculture, the Railroad <strong>Commission</strong> of <strong>Texas</strong>,and the State Soil and Water Conservation Board*.§601.3. Definitions. The following words and terms, when used in this chapter, shall have the followingmeanings unless the context clearly indicates otherwise:Act--House Bill 1458 (71st Regular Session) codified as §§26.401-407 <strong>Texas</strong> Water Code.<strong>Commission</strong>-- <strong>Texas</strong> Water <strong>Commission</strong>Committee--<strong>Texas</strong> Groundwater Protection CommitteeEnforcement Action--Any action of the agencies, identified in §601.2 of this chapter, whichaccomplishes or requires the identification, documentation, monitoring, assessing, or remediation of<strong>groundwater</strong> contamination.Groundwater--Water below the land surface in a zone of saturation.Groundwater Contamination--The detrimental alteration of the naturally occurring physical, thermal,chemical, or biological quality of <strong>groundwater</strong>. Further, <strong>groundwater</strong> contamination, for purposes ofinclusion of cases in the public files and the <strong>joint</strong> <strong>groundwater</strong> monitoring and contamination <strong>report</strong>, shall belimited to contamination reasonably suspected of having been caused by activities or by entities under thejurisdiction of the agencies identified in §601.2 of this chapter, except in the case of an underground source ofdrinking water granted an aquifer exemption by the commission with concurrence from the U.S.Environmental Protection Agency in accordance with40 CFR Parts 144, 145, and 146 and 31 TAC Chapter 331; and affecting <strong>groundwater</strong> which contains aconcentration of:(a) less than or equal to 10,000 milligrams per liter (mg/L) of dissolved solids, orA-13

(b) greater than 10,000 mg/L if it is(I)currently extracted for beneficial use such as domestic, industrial, or agricultural purposes,or(ii) hydrologically connected with and with the potential for contaminantmovement to a surface water body or another zone of <strong>groundwater</strong> which has aconcentration of less than or equal to 10,000 mg/L of dissolved solids.§601.4. Public File.(a) Subject to the limitations provided by the act and the Open Records Act, <strong>Texas</strong> Civil Statutes,Article 6252-17a, information collected, assembled, or maintained by the committee and the agencies subjectto the act is public record open to inspection and copying during regular business hours.(b) Each agency shall maintain a public file of all documented cases of <strong>groundwater</strong> contaminationthat are reasonably suspected of having been caused by activities regulated by the agency.§601.5. Joint Groundwater Monitoring and Contamination Report. In conjunction with the commission,the committee shall publish not later than April 1 of each year a <strong>joint</strong> <strong>groundwater</strong> monitoring andcontamination <strong>report</strong> covering the activities and findings of the committee made during the previous calendaryear. The <strong>report</strong> must:(1) Describe the current status of <strong>groundwater</strong> monitoring programs conducted by or required by eachagency at regulated facilities or in connection with regulated activities.(2) Contain a description of each case of <strong>groundwater</strong> contamination documented during the previouscalendar year and of each case of <strong>groundwater</strong> contamination documented during previous years for whichenforcement action was incomplete at the time of issuance of the preceding <strong>report</strong>.(3) Indicate the status of enforcement action for each case of <strong>groundwater</strong> contamination that is includedin the <strong>report</strong>.* Subsequent legislation addressing the reorganization of state agencies has since redefined the agencies which have responsibilitiesrelated to the protection of <strong>groundwater</strong>. Senate Bill 2 (72nd <strong>Texas</strong> Legislature, 1991) amended §5.001 of the <strong>Texas</strong> Water Code.Senate Bill 2 mandated certain divisions of the <strong>Texas</strong> Department of Health with regulatory authority over water and waste, and the<strong>Texas</strong> Water Well Drillers Board be consolidated within the <strong>Texas</strong> Water <strong>Commission</strong> (TWC) effective March 1, and September 1,1992, respectively. In addition, Senate Bill 2 combined the TWC and the <strong>Texas</strong> Air Control Board and named the new agency the <strong>Texas</strong>Natural Resource Conservation <strong>Commission</strong> (TNRCC) effective September 1, 1993. Senate Bill 469 of the 73rd <strong>Texas</strong> Legislature,1993, amended §26.403 of the <strong>Texas</strong> Water Code to extend Committee membership to the <strong>Texas</strong> Agricultural Experiment Station, theBureau of Economic Geology of the University of <strong>Texas</strong> at Austin, and the <strong>Texas</strong> Alliance of Groundwater Districts.A-14

Appendix 5. TNRCC Spill Prevention and ControlRulesThe TNRCC proposed rules concerning <strong>report</strong>ing unauthorized discharges and spills in the November 17,1995, <strong>Texas</strong> Register. The TNRCC adopted Title 30, <strong>Texas</strong> Administrative Code, §§327.1-327.5 (SpillPrevention and Control Rules), which became effective May 23, 1996. A <strong>report</strong>able discharge or spill is anunauthorized accidental discharge or spill of oil, petroleum product, used oil, hazardous waste, industrialsolid waste, or other substances into the environment in a quantity equal to or greater than a <strong>report</strong>ablequantity listed in Figure 16.Figure 16. Reportable Quantities (RQ)(Title 30, <strong>Texas</strong> Administrative Code, §327.4)Released Onto LandReleased Into WaterHazardous substances final RQ in Table 304.2 final RQ in Table 304.21in 40 CFR §304.2in 40 CFR §304.2; except wherefinal RQ is >100 pounds, inwhich case the RQ is 100 poundsCrude oil and oil other than that 210 gallons (five barrels) quantity sufficient to create adefined as petroleum product orsheenused oilPetroleum product and 25 gallons; 210 gallons (five quantity sufficient to create aused oil barrels) for petroleum storage sheentank exempted facilitiesIndustrial solid waste or other --- 100 poundssubstances1CFR: Code of Federal RegulationsUpon the determination that a <strong>report</strong>able discharge or spill has occurred, the responsible person must notifythe TNRCC as soon as possible but no later than 24 hours after its discovery. The responsible person mustnotify either:< the State Emergency Response Center at 1-800-832-8224;< during normal business hours, the TNRCC Regional Office in which the discharge or spill occurred(TNRCC's Regional Office telephone numbers are included in Appendix 6); orA-15

the TNRCC’s 24-hour spill <strong>report</strong>ing hotline at 512-463-7727.The responsible person’s initial notification must contain, to the extent known, the following information:< the name, address, and telephone number of the person making the telephone <strong>report</strong>;< the date, time, and location of the discharge or spill;< a specific description or identification of the substances discharged or spilled;< an estimate of the quantity discharged or spilled;< the duration of the incident;< the name of the surface water or a description of the waters in the state affected or threatened by thedischarge or spill;< the source of the discharge or spill;< a description of the extent of actual or potential water pollution or harmful impacts to the environment andan indication of any environmentally sensitive areas or natural resources at risk;< if other than the person making the telephone <strong>report</strong>, the names, addresses, and telephone numbers of theresponsible person and the contact person at the location of the discharge or spill;< a description of any actions that have been taken, are being taken, and will be taken to contain and respondto the discharge or spill;< any known or anticipated health risks;< the identity of any governmental representatives, including local authorities or third parties, responding tothe discharge or spill; and< any other information that may be significant to the response action.If the discharge or spill creates an imminent health threat, the responsible person must immediately notify andcooperate with local emergency authorities (fire department, fire marshal, law enforcement authority, healthauthority, or Local Emergency Planning Committee as appropriate). The responsible person must cooperatewith the local emergency authority in providing support to implement appropriate notification and responseactions. The local emergency authority, as necessary, must implement its emergency management plan,which may include notifying and evacuating affected persons. In the absence of a local emergency authority,the responsible person must take reasonable measures to notify potentially affected persons of the imminenthealth threat.The responsible person must immediately abate and contain the discharge or spill and cooperate fully with theTNRCC and the local emergency authority. The responsible person must also begin reasonable responseactions which may include, but are not limited to, the following actions:< arrival of the responsible party or response personnel hired by the responsible person at the site of thedischarge or spill;< initiating efforts to stop the discharge or spill;< minimizing the impact to the public health and the environment;< neutralizing the effects of the incident;< removing the discharged or spilled substances; and< managing the wastes.The responsible person must submit written information describing the details of the discharge or spill andsupporting the adequacy of the response action, to the appropriate TNRCC Regional Manager within 30A-16

working days of the discovery of the discharge or spill. A <strong>report</strong> is not required for spills occurring during thenormal course of transportation which are <strong>report</strong>ed to the U.S. Department of Transportation under 49 Codeof Federal Regulations §171.16. If a spill cannot be cleaned up within 180 days of the date it was <strong>report</strong>ed,the responsible person is required to clean up the spill in accordance with the TNRCC’s risk-based correctiveaction rules.The TNRCC’s Spill Prevention and Control Rules apply to discharges or spills that result in a release to theenvironment within the territorial limits of the state, including the coastal waters of the state. The SpillPrevention and Control Rules do not apply to the following.< Discharges or spills of oil that enter or threaten to enter the coastal waters of the state. Except for spills ofoil of 240 barrels or less for which the Railroad <strong>Commission</strong> of <strong>Texas</strong> is the on-scene coordinator, suchdischarges or spills are regulated by the <strong>Texas</strong> General Land Office under the Oil Spill Prevention andResponse Act of 1991, the <strong>Texas</strong> Natural Resources Code, Chapter 40, Subchapters C, D, E, F, and G.< Discharges or spills from activities subject to the jurisdiction of the Railroad <strong>Commission</strong> of <strong>Texas</strong> under§26.131, <strong>Texas</strong> Water Code.< Releases only to air.< The lawful placement of waste or accidental discharge of material into a solid waste management unitregistered or permitted under Title 30, <strong>Texas</strong> Administrative Code, Chapter 335, Subchapter A (relating toIndustrial Solid Waste and Municipal Hazardous Waste in General).< Units and activities regulated under the authority of the <strong>Texas</strong> Water Code, Chapter 26, Subchapter I(relating to Underground and Aboveground Storage Tanks).< The lawful application of materials, including but not limited to fertilizers and pesticides, to land or water.< Discharges that are authorized by a permit, order, or rule issued under federal law or any other law of thestate, provided, however, that discharges not so authorized shall be <strong>report</strong>ed under the Spill Prevention andControl Rules unless the permit, order, or another TNRCC rule provides an applicable <strong>report</strong>ingrequirement.< Discharges or spills that are continuous and stable in nature, and are <strong>report</strong>ed to the U.S. EnvironmentalProtection Agency under 40 Code of Federal Regulations (CFR) §302.8.< Discharges or spills occurring during the normal course of rail transportation about which carriers arerequired to give notice and <strong>report</strong> in accordance with 49 CFR §171.15 and §171.16.A-17

Appendix 6. District and Regional Offices<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>Railroad <strong>Commission</strong> of <strong>Texas</strong><strong>Texas</strong> Alliance of Groundwater DistrictsA-18

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Appendix 7. Agency and District ContactsThe following persons may be contacted for further information regarding individual programs or forguidance related to specific <strong>groundwater</strong> contamination cases which are listed under their program’sjurisdiction.TEXAS NATURAL RESOURCE CONSERVATION COMMISSIONOffice of Compliance and EnforcementCompliance Support DivisionMike Hess(512) 239-1436Enforcement DivisionTom Jecha(Waste Section) (512) 239-6660Enforcement DivisionBrian Lehmkuhle(Water Section) (512) 239-4482Field Operations DivisionJennifer Sidnell(Water Program) (512) 239-0400Office of Waste ManagementIndustrial and Hazardous Waste DivisionRobert Musick(Technical Consultants Section) (512) 239-2243Municipal Solid Waste DivisionAda Lichaa(512) 239-6728Petroleum Storage Tank DivisionVicky Montgomery(Responsible Party Remediation) (512) 239-5695Pollution Cleanup DivisionGordon Banner(Corrective Action) (512) 239-5914Pollution Cleanup DivisionScott Crouch(Voluntary Cleanup) (512) 239-2486A-25

Office of Water Resource ManagementWater Quality DivisionWater Utilities DivisionTEXAS DEPARTMENT OF HEALTHTEXAS DEPARTMENT OF AGRICULTURECary Betz(512) 239-4455Ron Bearden(512) 239-6020Jim Roach(512) 834-6635Jeanette O’Hare(512) 463-7537RAILROAD COMMISSION OF TEXASSurface Mining and Reclamation DivisionOil and Gas DivisionTim Walter(512) 463-6900Bill Renfro(512) 463-6812TEXAS STATE SOIL AND WATER CONSERVATIONBeade NorthcuttBOARD (817) 773-2250TEXAS WATER DEVELOPMENT BOARDBUREAU OF ECONOMIC GEOLOGYTEXAS ALLIANCE OF GROUNDWATER DISTRICTSPhil Nordstrom(512) 936-0838Alan Dutton(512) 471-5739Scott Holland(915) 835-2015Barton Springs/Edwards Aquifer Conservation DistrictCoke County Underground Water Conservation DistrictDallam County Underground Water Conservation DistrictBill Couch(512) 282-8441Eph Cummins(915) 453-2232Glen Olson(806) 362-4673A-26

Edwards Aquifer AuthorityEmerald Underground Water Conservation DistrictEvergreen Underground Water Conservation DistrictGlasscock County Underground Water Conservation DistrictHarris-Galveston Coastal Subsidence DistrictHickory Underground Water Conservation District No. 1High Plains Underground Water Conservation District No. 1Hill Country Underground Water Conservation DistrictIrion Country Underground Water Conservation DistrictJeff Davis Country Underground Water Conservation DistrictLipan-Kickapoo Water Conservation DistrictLive Oak Underground Water Conservation DistrictMedina Country Underground Water Conservation DistrictMesa Underground Water Conservation DistrictNorth Plains Groundwater Conservation District No. 2Greg Ellis(210) 222-2204Dennis Clark(915) 392-5156Mike Mahoney(210) 769-3740Rick Marston(915) 354-2430Ron Neighbors(281) 486-1105Stan Reinhard(915) 597-2785Wayne Wyatt(806) 762-0181Paul Tybor(210) 997-4472Scott Holland(915) 835-2015Albert Miller(915) 467-2971Allan Lange(915) 469-3988Lonnie Stewart(512) 449-1151Luana Buckner(210) 426-3162Harvey Everheart(806) 872-9205Richard Bowers(806) 935-6401A-27

Panhandle Groundwater Conservation District No. 3Permian Basin Underground Water Conservation DistrictPlateau Underground Water Conservation and Supply DistrictSandy Land Underground Water Conservation DistrictSanta Rita Underground Water Conservation DistrictSouth Plains Underground Water Conservation DistrictSpringhills Water Management DistrictSterling County Underground Water Conservation DistrictSutton County Underground Water Conservation DistrictUvalde County Underground Water Conservation DistrictC.E. Williams(806) 883-2501Mark Hoelscher(915) 756-2136Cindy Cawley(915) 853-2121David Turnbough(806) 456-2155Eugene Vinson(915) 884-2893Lee Arrington(806) 637-7467Cameron Cornett(210) 796-7260Bob Jennings(915) 378-2704Mike Smith(915) 387-2369Helen D. Cates(210) 278-8242A-28

Appendix 8. Agency Central Records LocationsThe following addresses and phone numbers are provided for agency central records locations. Furtherinformation concerning the <strong>groundwater</strong> contamination cases listed in Tables 1 through 4 may be accessed atthese locations.TEXAS NATURAL RESOURCE CONSERVATIONCOMMISSIONCENTRAL RECORDSLOCATIONS-CSPark 35, Building F-WQ 12015 Park 35 Circle, Room 1301-WU Austin, <strong>Texas</strong> 78753(512) 239-0900-PSTPark 35, Building D-IHW 12118 N. IH35, Room 190-ENF Austin, <strong>Texas</strong> 78753-PCD (512) 239-2920-IHW/RADIOACTIVE WASTEPark 35, Building F-IHW/UIC 12015 Park 35 Circle, Room 1305-MSW Austin, <strong>Texas</strong> 78753-WUD (512) 239-6204-FODRAILROAD COMMISSION OF TEXASCOMPLAINT FILES ROOMWilliam B. Travis BuildingRoom 11107B, 11th Floor1701 N. CongressAustin, <strong>Texas</strong> 78701(512) 463-6835AQUIFER REMEDIATION CASESWilliam B. Travis BuildingRoom 9-181D, 9th Floor1701 N. CongressAustin, <strong>Texas</strong> 78701Contact: Richard Ginn(512) 463-6796A-29

TEXAS DEPARTMENT OF AGRICULTUREStephen F. Austin Bldg.Room 1032, 10th Floor1700 N. CongressAustin, <strong>Texas</strong> 78701Contact: Jeanette O’Hare(512) 463-7537BARTON SPRINGS/EDWARDS AQUIFERCONSERVATION DISTRICT1124-A Regal RowAustin, <strong>Texas</strong> 78748(512) 282-8441EVERGREEN UNDERGROUND WATERCONSERVATION DISTRICTP.O. Box 155Jourdanton, <strong>Texas</strong> 78026(210) 769-3740A-30

Appendix 9. Other Reports and PublicationsThere are numerous water-agency publications addressing the state’s <strong>groundwater</strong> resources, <strong>groundwater</strong>quality, <strong>groundwater</strong> protection, and <strong>groundwater</strong> contamination. These <strong>report</strong>s provide a different focus orperspective on <strong>groundwater</strong> quality conditions and present information not contained within this <strong>report</strong>. Otherpublications of these agencies provide information on statewide <strong>groundwater</strong> protection efforts and specificprotection programs.<strong>Texas</strong> Groundwater Protection Committee PublicationsThere are seven annual predecessors to this <strong>report</strong> as produced annually by the <strong>Texas</strong> Groundwater ProtectionCommittee and published by the <strong>Texas</strong> Water <strong>Commission</strong>/<strong>Texas</strong> Natural Resource Conservation<strong>Commission</strong>. Report Z 94, the initial <strong>report</strong>, contains information on the <strong>groundwater</strong> contamination casesdocumented or under enforcement during 1989. Each successive <strong>report</strong> presents information on the<strong>groundwater</strong> contamination cases documented or under enforcement for the calendar year as titled. The sevenpreceding <strong>report</strong>s are:<strong>Texas</strong> Groundwater Protection Committee, 1990, Joint Groundwater Monitoring andContamination Report, <strong>Texas</strong> Water <strong>Commission</strong> (TWC) Publication No. Z 94, April 1990., 1991, Joint Groundwater Monitoring and Contamination Report - 1990, TWCPublication No. Z 104, April 1991., 1992, Joint Groundwater Monitoring and Contamination Report - 1991, TWCPublication No. R 92-02, May 1992., 1993, Joint Groundwater Monitoring and Contamination Report - 1992, TNRCCPublication No. SFR-1, November 1993., 1994, Joint Groundwater Monitoring and Contamination Report - 1993, TNRCCPublication No. SFR-6, May 1994., 1995, Joint Groundwater Monitoring and Contamination Report - 1994, TNRCCPublication No. SFR-20, April 1995., 1996, Joint Groundwater Monitoring and Contamination Report - 1995, TNRCCPublication No. SFR-36, April 1996., 1997, Joint Groundwater Monitoring and Contamination Report - 1996, TNRCCPublication No. SFR-56, June 1997.Five other publications prepared by the <strong>Texas</strong> Groundwater Protection Committee address the issues of thestate's complex set of <strong>groundwater</strong> protection programs and address the coordination and improvement ofthese various programs to best protect the state's <strong>groundwater</strong> resources.A-31

<strong>Texas</strong> Ground Water Protection Strategy, January 1988, offers a guide for developing new programs andimproving cooperation and coordination among agencies and programs. Goals for new programs andimprovements are set out in a number of important <strong>groundwater</strong> program areas.<strong>Texas</strong> Ground Water Protection Profiles, June 1991, presents the <strong>groundwater</strong> protection programs andauthorities of state agencies with respect to <strong>groundwater</strong>. This <strong>report</strong> is somewhat out of date due to thereorganization of state agencies in 1992 and 1993 as mandated by Senate Bill 2 (72nd Regular Session of the<strong>Texas</strong> Legislature, 1991). The programs listed in this publication for the <strong>Texas</strong> Water Well Drillers Boardand the <strong>Texas</strong> Department of Health have been reorganized within the <strong>Texas</strong> Natural Resource Conservation<strong>Commission</strong>. In addition, the <strong>Texas</strong> State Soil and Water Conservation Board has the primary authority foractivities relating to agricultural and silvicultural nonpoint source abatement.<strong>Texas</strong> Ground-Water Data Dictionary, August, 1996, describes a standardized framework for collecting andstoring information on <strong>groundwater</strong> in <strong>Texas</strong>. The production and development of the data dictionary took aproactive approach to consider data sharing and data quality in view of three recent technological advances:distributed computing, geographic information systems, and widespread data exchange via the Internet. Useof 135 data elements contained in the dictionary will make it easier to share information stored in variouscomputer programs and operating systems, and will facilitate processing of information in a geographicinformation system (GIS).<strong>Texas</strong> Groundwater Program Directory, October 1996, has been developed by the Committee to serve as aquick reference guide for the public for all subjects related to <strong>groundwater</strong> within the state. The directoryprovides a subject-reference telephone directory for <strong>groundwater</strong> related programs, contacts, etc. to assist thegeneral public in accessing desired state agency personnel.<strong>Texas</strong> State Management Plan for Prevention of Pesticide Contamination of GroundWater, publicationpending, describes the general policies and regulatory approaches the state will use in order to protect<strong>groundwater</strong> resources from risk of contamination by pesticides. The document describes a genericcoordinating mechanism between all responsible and participating agencies during the implementation of theplan, and provides for specific actions and responses necessary to prevent or manage pesticide contaminationof <strong>groundwater</strong>, as the need arises.<strong>Texas</strong> Water <strong>Commission</strong>/<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong> Publications<strong>Texas</strong> Water <strong>Commission</strong>, 1989, Ground-Water Quality of <strong>Texas</strong> - An Overview of Naturaland Man-Affected Conditions, TWC Publication No. 89-01, March 1989.This out-of-print publication provides an overview of <strong>groundwater</strong> quality conditions in the state based ona review of the available data from many sources. Water quality, as expressed by the concentration oftotal dissolved solids, is mapped for seven major aquifers and 17 minor aquifers in the state. Theconcentrations of other important constituents, such as nitrates, iron, and sulfates, are mapped for theaffected major aquifers. A basic discussion of hydrogeology, the chemistry and evolution of water quality,and the potential impact of man's activities is provided. The affect of man's activities is assessed in termsof its impact on the state's <strong>groundwater</strong> resources. The <strong>report</strong> also discusses aquifer vulnerability mappingand DRASTIC. Two DRASTIC vulnerability maps are presented depicting the relative sensitivity of thestate's <strong>groundwater</strong> resources to surface sources of contamination. The <strong>report</strong> concludes that the greatestA-32

impact on the quality of the state's <strong>groundwater</strong> is from naturally occurring sources of more saline water.The <strong>report</strong> further concludes that, in terms of water quality, probably less than one percent of the state's<strong>groundwater</strong> is affected by man's activities and the effects are centered in areas of large population andindustrial development.<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>, 1994, Risk-Based Corrective Action forLeaking Storage Tank Sites, TNRCC Publication No. RG-36, January 1994.This document describes, in detail, the application of risk assessment to prioritize leaking storage tanksites, develop site-specific, risk-based cleanup levels, and determine the level of remediation required ateach site.<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>, 1994, Guidance Manual for RiskAssessment Contaminant Fate and Transport Modeling, TNRCC Publication RG-91, May 1994.This document is a guide designed to provide a basic understanding of how contaminants behave whenreleased from a storage tank system. The document offers a general explanation of contaminant fate andtransport processes and contaminant fate and transport models and modeling practices. It also providessome direction on how to address certain situations that may be encountered.<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>, 1995, Guidance for Risk-BasedAssessments at LPST Sites in <strong>Texas</strong>: Emphasizing Initial Investigations and Plan A Evaluations,TNRCC Publication No. RG-175, October 1995.This document defines site assessment protocol and requirements which should be followed at newlyconfirmed and existing leaking petroleum storage tank (LPST) sites. This new risk-based assessmentprocess and <strong>report</strong>ing (Assessment Report Form, TNRCC-0562) replaces the Limited Site Assessmentguidance and <strong>report</strong> form.<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>, 1996, The State of <strong>Texas</strong> Water QualityInventory -13th Edition, TNRCC Publication No. SFR-50, December 1996.This publication describes the conditions of the state's surface and <strong>groundwater</strong> quality. The state’s<strong>groundwater</strong> protection program is described and the major documented and potential sources of<strong>groundwater</strong> contamination are identified. Ambient <strong>groundwater</strong> quality conditions and documented casesof <strong>groundwater</strong> contamination are assessed for selected aquifers.<strong>Texas</strong> Natural Resource Conservation <strong>Commission</strong>, 1997, State of <strong>Texas</strong> Oil and HazardousSubstances Spill Contingency Plan - 1996, TNRCC Publication No. ____, March 1997.This publication provides general guidance for a coordinated response to oil and hazardous substancespills and outlines notification procedures by which spills shall be <strong>report</strong>ed to state and federal agencies.The publication represents the cooperative efforts of the TNRCC, the <strong>Texas</strong> General Land Office, and theRailroad <strong>Commission</strong> of <strong>Texas</strong>.A-33

<strong>Texas</strong> Water Development Board Publications<strong>Texas</strong> Water Development Board, 1976, Annotated Bibliography of <strong>Texas</strong> Water ResourcesReports of the <strong>Texas</strong> Water Development Board and the United States Geological Survey throughAugust 1974, TWDB Report 199, February 1976.This bibliography of state and federal agency water related publications contains a listing, with a briefsummary, of <strong>report</strong>s addressing <strong>groundwater</strong> contamination investigations.<strong>Texas</strong> Water Development Board, 1992, <strong>Texas</strong> Water Development Board PublicationsCatalog, TWDB Publication Catalog, June 1992.Presented within this bibliography is a partially annotated list of all works published by the <strong>Texas</strong>Department of Water Resources (the predecessor agency to the TWDB and the <strong>Texas</strong> Water <strong>Commission</strong>)and its predecessor agencies through August 1985. It also provides a completely annotated list of workspublished by the TWDB since September 1, 1985. A county index for the publications noted above areincluded in this bibliography.<strong>Texas</strong> Water Development Board, 1990, A Field Manual for Ground Water Sampling, TWDBUsers Manual UM-51, May 1990, Revised September 1991.This users manual describes the Board's standardized procedures for the ambient <strong>groundwater</strong> samplingprogram. It explains sample collection and chemical characterization procedure guidelines followed byTWDB personnel during field sampling events.<strong>Texas</strong> Water Development Board, 1990, Water for <strong>Texas</strong>: Today and Tomorrow. (<strong>Texas</strong> WaterPlan), TWDB Publication GP 5-1, December 1990., 1992, Water for <strong>Texas</strong>: Today and Tomorrow. Recommendations for the 1992 Update ofthe <strong>Texas</strong> Water Plan, TWDB Publication GP 6-1, December 1992., 1997, Water for <strong>Texas</strong>: Today and Tomorrow. A Consensus-Based Update to the StateWater Plan, TWDB in Conjunction with the TNRCC and <strong>Texas</strong> Parks and Wildlife Department,Working/Final Draft, June 1997.These <strong>report</strong>s present statewide water planning information, issues, and goals, including reviseddelineations of the state's major and minor aquifers. The 1997 edition of the <strong>Texas</strong> Water Plan, scheduledfor publication in the summer, represents the consensus development process between the TWDB,TNRCC, and the <strong>Texas</strong> Parks and Wildlife Department (TPWD). In the consensus process, the TNRCChas addressed water policies based on program and regulatory needs; the TWDB has approached waterfrom a financial, <strong>groundwater</strong>, surface water, and long-range planning perspective; and the TPWD hasaddressed water protection for ecosystems in streams, bays, and estuaries. This coordination has providedfor a clearer perspective of the state's long-term water needs.<strong>Texas</strong> Water Development Board (TWDB), 1991, Delineation Criteria for the Major andMinor Aquifer Maps of <strong>Texas</strong>, TWDB Limited Publication 212, June 1991.A-34

This <strong>report</strong> documents the criteria and sources used by the TWDB to delineate each of the nine major and20 minor aquifers in the state. The <strong>report</strong> includes a major aquifer and minor aquifer map.<strong>Texas</strong> Water Development Board, 1995, Aquifers of <strong>Texas</strong>, TWDB Report 345, November1995.Aquifers of <strong>Texas</strong> provides general information pertaining to location, geology, quality, yield, commonuse, and specific problems of the state’s aquifers. Publications specific to each of the state’s aquifers arereferenced following each aquifer description.<strong>Texas</strong> Department of Health Publication<strong>Texas</strong> Department of Health Strategic Plan 1995-1999, 1994, gives the vision and mission statement for the<strong>Texas</strong> Department of Health. The role of public health in protecting the health of citizens of the state cutsacross many subjects and programs, including preserving the state's environment and ensuring wise,productive use of the state's natural resources.Bureau of Economic Geology PublicationsThe Bureau of Economic Geology is a research bureau of the University of <strong>Texas</strong> at Austin. The Bureauconducts basic and applied research projects in coastal processes, energy and mineral resources, and inhydrogeology, <strong>groundwater</strong> resources, and environmental site assessment and remediation. The Bureaupublishes major <strong>report</strong>s in the University of <strong>Texas</strong> Publication series. The Bureau’s List of Publications isupdated annually. The List of Publications can be obtained by contacting the Bureau’s Publication Salesoffice at 1-888-839-4365.Mace, R.E., Fisher, R.S., Welch, D.M., and Parra, S.P., 1997, Extent, Mass, and Duration ofHydrocarbon Plumes from Leaking Petroleum Storage Tank Sites in <strong>Texas</strong>, Bureau of EconomicGeology, University of <strong>Texas</strong> at Austin Geologic Circular 97-1, 1997.This study consisted of compiling and summarizing leaking petroleum storage tank site information andquantifying the size, mass, and duration of dissolved benzene plumes in <strong>Texas</strong> in order to determinedimensions of the plumes, predictability of plume concentrations and lengths, rates at which plumes selfremediate,and classification of plume behavior to assist in exposure assessments. The study is the firstattempt to quantify the general site, soil, hydrogeologic, and plume characteristics throughout <strong>Texas</strong> and indifferent regions of the state.A-35

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