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FINAL

ENHANCED PRELIMINARY ASSESSMENT REPORT FOR TOOELE ARMY DEPOT - NORTH AREA TOOELE, UTAH

CVJ

Submitted to:

U.S. ARMY ENVIRONMENTAL CENTER ABERDEEN PROVING GROUND, MARYLAND 21C

Submitted by:

AGEISS ENVIRONMENTAL, INC. 1900 Grant Street, Suite 1130 Denver, Colorado 80203

USAEC Contract DAAA15-93-D-0006 Delivery Order 001

pELECTEffl lNQVJ!SJi§£5J

October 5,1994 DUG QUALITY IHSPECTED 8

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Unlimited Distribution Approved for Public Release

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AEC Form 45, 1 Feb 93 replaces THAMA Form 45 which is obsolete.

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ADDENDUM

JANUARY 30, 1995

FINAL ENHANCED PRELIMINARY ASSESSMENT REPORT FOR TOOELE ARMY DEPOT - NORTH AREA

TOOELE, UTAH

The revision listed below is necessary based on comments received from the State of Utah review of the Final Enhanced Preliminary Assessment (ENPA) Report for the Tooele Army Depot - North Area, Tooele, Utah, submitted to the U.S. Army Environmental Center on October 5, 1994 by AGEISS Environmental, Inc.

1) Replace the last sentence in Section 3.11.1 on Page 50 of the October 5, 1994 Final ENPA Report with the following sentence to provide additional clarification, as requested by the State of Utah.

"None of the transformers from which PCBs were released, as identified during the 1993 Audit Inspection, were located in the BRAC parcel."

•

E007\DO1\FINAL.ENP\ADDENFNLENP Rev. 01/30/95; 10:11am

REPORT DOCUMENTATION PAGE

1a REPORT SECURITY CLASSIFICATION Unclassified

2a SECURITY CLASSIFICATION AUTHORITY

2b. DECLASSIFICATION/DOWNGRADING SCHEDULE

4. PERFORMING ORGANIZATION REPORT NUMBERS(S)

6a NAME OF PERFORMING ORGANIZATION AGEISS Environmental, Inc.

6b. OFFICE SYMBOL (it applicable)

6C. ADDRESS (City, State, and ZIP Code)

1900 Grant Street, Suite 1130 Denver, CO 80203

8a NAME OF FUNDING/SPONSORING ORGANIZATION USAEC

8b. OFFICE SYMBOL fit applicable)

8C. ADDRESS (City, State, and ZIP Code)

Aberdeen Proving Ground Edgewood, MD 21010-5401

1b. RESTRICTIVE MARKINGS

3. DISTRIBUTION/AVAILABILITY OF REPORT

5. MONITORING ORGANIZATION REPORT NUMBER(S)

7a NAME OF MONITORING ORGANIZATION

U.S. Army Environmental Center

7b. ADDRESS (City, State, and ZIP Code)

ATTN: SFIM-AEC-BCD Building E4480 Aberdeen Proving Ground, MD 21010-5401

9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER

Contract DAAA15-93-D-0006; Delivery Order 0001

10. SOURCE OF FUNDING NUMBERS

PROGRAM ELEMENT NO.

PROJECT NO.

TASK NO. WORK UNIT ACCESSION NO.

11. TITLE (include Security Classification)

Final Enhanced Preliminary Assessment (ENPA) Report forTooele Army Depot - North Area Tooele, Utah

12. PERSONAL AUTHOR(S) E. Kiely, M. Russ, P. DePersis, and F. Vega

133. TYPE OF REPORT Final

13b. TIME COVERED FROM 10/01/93 TO 10/05/94

14. DATE OF REPORT (Year, Month, Day) 94,10,05

15. PAGE COUNT 180 (approximately)

16. SUPPLEMENTARY NOTATION Report is contained in one volume _____

COSAT1 CODES

FIELD GROUP SUB-GROUP

18. SUBJECT TERMS (continue on reverse f necessaryand identity by block number)

Enhanced Preliminary Assessment, ENPA, Base Realignment Base Closure, BRAC, BRAC Parcel,

Tooele Army Depot, North Area

19. ABSTRACT (Continue on reverse it necessay and identity by bkxk number)

This Final ENPA report documents the existing environmental conditions associated with a 1,684 acre parcel of Tooele Army Depot - North Area (TEAD-N) that is scheduled for realignment and to provide recommendations for further action. The Final ENPA Report presents a summary and evaluation of the data relevant to the BRAC parcel located at TEAD-N within the report the subject property and its surrounding environment and land uses, as well as previous environmental investigations conducted at TEAD-N are described. Nineteen AREEs are identified and characterized, and the known and potential releases, conclusions, and recommendations regarding each of the AREEs are included in the discussions. Potential human and environmental receptors of any releases or potential releases are also evaluated and discussed as part of the report. Of the nineteen AREEs identified within the BRAC parcel, Phase I RFIs are recommended for five, since no evidence of previous investigation was found. Further investigation under ongoing Phase II RFIs is recommended for seven AREEs based on conclusions and data gaps identified under prior investigations. Further action under the ongoing CERCLA program is recommended for one AREE. Inclusion in the upcoming corrective measures study, with some additional contamination assessment sampling, is recommended for one AREE. Finally, management under installation-based programs is recommended for five AREEs. Areas with minimal potential for environmental problems associated with property transfer are also delineated. 20. DISTRIBUTION/AVAILABILITY OF ABSTRACT

D UNCLASSIFIED/UNLIMITED □ SAME AS RFT. D DTIC USERS

22a. NAME OF RESPONSIBLE INDIVIDUAL

Kenneth Quirk

21. ABSTRACT SECURITY CLASSIFICATION UNCLASSIFIED

22b. TELEPHONE (indu<* Am ccd»

(410) 671-1635

22c. OFFICE SYMBOL

DD FORM 1473, 84 MAR 83- APR edition may IM usad until exhausted. All other editions are obsolete.

SECURrrV CLASSIFICATION ON THIS PAGE

UNCLASSFIED

FINAL

ENHANCED PRELIMINARY ASSESSMENT REPORT FOR TOOELE ARMY DEPOT - NORTH AREA TOOELE, UTAH

Submitted to:

U.S. ARMY ENVIRONMENTAL CENTER ABERDEEN PROVING GROUND, MARYLAND 21020

Submitted by:

AGEISS ENVIRONMENTAL, INC. 1900 Grant Street, Suite 1130 Denver, Colorado 80203

USAEC Contract DAAA15-93-D-0006 Delivery Order 001

October 5,1994

The views, opinions, and/or findings contained in this report are those of the author(s) and should not be construed as an official Department of the Army position, policy, or decision unless by official documentation.

TABLE OF CONTENTS

Section Page

EXECUTIVE SUMMARY viii

1.0 INTRODUCTION 1 1.1 ENPA REGULATORY BACKGROUND 1 1.2 OBJECTIVES 1 1.3 PROCEDURES 2

1.3.1 Document Review 2 1.3.2 Site Visits 2 1.3.3 Regulatory Review 3

1.4 REPORT FORMAT 3

2.0 PROPERTY CHARACTERIZATION 4 2.1 PROPERTY LOCATION 4 2.2 HISTORICAL BACKGROUND 4 2.3 DESCRIPTION OF BRAC PARCEL 4

2.3.1 Maintenance and Supply Area 15 2.3.1.1 Open Storage Lots 15 2.3.1.2 Warehouses 15 2.3.1.3 Maintenance Buildings and Facilities 16

2.3.2 Administrative Area 18 2.4 ENVIRONMENTAL SETTING 18

2.4.1 Demographics and Land Use 19 2.4.2 Climate 19 2.4.3 Physiography 20 2.4.4 Surface Water 20 2.4.5 Soils 21 2.4.6 Geology and Hydrogeology 21 2.4.7 Flora and Fauna 25 2.4.8 Archeological Resources 26

2.5 PREVIOUS ENVIRONMENTAL STUDIES AT TEAD-N 27 2.5.1 CERCLA Status 27 2.5.2 RCRA Status 27

3.0 AREAS REQUIRING ENVIRONMENTAL EVALUATION 33 3.1 SWMU 49: OLD WASTEWATER DISTRIBUTION SYSTEM/RADIATOR

REPAIR FACILITY (AREE 1) 33 3.1.1 Description 33

3.1.1.1 Current Stormwater Sewer System (Former Industrial Wastewater Pipelines) (1a) 33

3.1.1.2 Old Connections to the New Wastewater System (1 b) 37

3.1.1.3 Radiator Repair Facility (1c) 37 3.1.2 Known and Suspected Releases 38 3.1.3 Conclusions 39 3.1.4 Recommendations 39

AEC_TEP\D01\FINALENP\FNLTEXT.ENP FINAL Rev. 09/25/94; 5:59pm j

TABLE OF CONTENTS (Continued)

Section E§9§

3.2 SWMU 47: BOILER PLANT BLOWDOWN WATER (AREE 2) 40 3.2.1 Description 40 3.2.2 Known and Suspected Releases 40 3.2.3 Conclusions 41 3.2.4 Recommendations 41

3.3 SWMU 50: COMPRESSOR CONDENSATE DRAIN (AREE 3) 41 3.3.1 Description 41 3.3.2 Known and Suspected Releases 41 3.3.3 Conclusions 42 3.3.4 Recommendations 42

3.4 SWMU 51: CHROMIC ACID/ALODINE DRYING BEDS (AREE 4) 42 3.4.1 Description 42 3.4.2 Known or Suspected Releases 42 3.4.3 Conclusions 42 3.4.4 Recommendations 42

3.5 SWMUs 31, 32, AND 53: PCB-RELATED AREAS (AREE 5) 43 3.5.1 Description 43 3.5.2 Known and Suspected Releases 43 3.5.3 Conclusions 44 3.5.4 Recommendations 44

3.6 SWMUs 4 AND 54: SAND BLAST AREAS (AREE 6) 44 3.6.1 Description 44 3.6.2 Known and Suspected Releases 45 3.6.3 Conclusions 45 3.6.4 Recommendations 45

3.7 SWMU 46: WASTE OIL DUMPSTERS/STORAGE TANKS (AREE 7) 45 3.7.1 Description 45 3.7.2 Known and Suspected Releases 45 3.7.3 Conclusions 46 3.7.4 Recommendations 46

3.8 SWMU 26: DEFENSE REUTILIZATION AND MARKETING OFFICE AREA (AREE 8) 46 3.8.1 Description 46 3.8.2 Known and Suspected Releases 47 3.8.3 Conclusions 48 3.8.4 Recommendations 48

3.9 SWMU 38: INDUSTRIAL WASTEWATER TREATMENT PLANT (AREE 9) 48 3.9.1 Description 48 3.9.2 Known and Suspected Releases 49 3.9.3 Conclusions 49 3.9.4 Recommendations 49

3.10 ASBESTOS (AREE 10) 49 3.10.1 Description 49 3.10.2 Known and Suspected Releases 50 3.10.3 Conclusions 50

3.10.4 Recommendations 50

AEC_TEP\D01\FINAL.ENP\FNLTEXT.ENP FINAL

Rev. 09/25/94; 5:59pm Ü


Section Page

3.11 PCB-CONTAINING TRANSFORMERS (AREE 11) 50 3.11.1 Description 50 3.11.2 Known and Suspected Releases 50 3.11.3 Conclusions 50 3.11.4 Recommendations 50

3.12 UNDERGROUND STORAGE TANKS (AREE 12) 51 3.12.1 Description 51 3.12.2 Known and Suspected Releases 51 3.12.3 Conclusions 51 3.12.4 Recommendations 51

3.13 ABOVE GROUND STORAGE TANKS (AREE 13) 52 3.13.1 Description 52 3.13.2 Known and Suspected Releases 52 3.13.3 Conclusions 52 3.13.4 Recommendations 52

3.14 SWMU 52: DRAIN FIELD AND DISPOSAL TRENCHES (AREE 14) 52 3.14.1 Description 52 3.14.2 Known or Suspected Releases 52 3.14.3 Conclusions 53 3.14.4 Recommendations 53

3.15 SWMU 55: BATTERY SHOP (AREE 15) 53 3.15.1 Description I 53 3.15.2 Known and Suspected Releases 53 3.15.3 Conclusions 53 3.15.4 Recommendations 53

3.16 SWMU 28: 90-DAY DRUM STORAGE AREA (AREE 16) 53 3.16.1 Description 53 3.16.2 Known and Suspected Releases 54 3.16.3 Conclusions 54 3.16.4 Recommendations 54

3.17 SWMU 29: DRUM STORAGE AREAS (AREE 17) 55 3.17.1 Description 55 3.17.2 Known and Suspected Releases 55 3.17.3 Conclusions 56 3.17.4 Recommendations 56

3.18 SWMUs 2 AND 30: CONVEYANCE DITCHES AND LAGOONS (AREE 18) 56 3.18.1 Description 56 3.18.2 Known and Suspected Releases 57 3.18.3 Conclusions 57 3.18.4 Recommendations 58

3.19 LEAD-BASED PAINT (AREE 19) 58 3.19.1 Description 58 3.19.2 Known and Suspected Releases 59 3.19.3 Conclusions 59 3.19.4 Recommendations 59

AEC_TEP\D01\FINALENP\FNLTEXT.ENP FINAL Rev. 09/25/94; 5:59pm ÜJ


Section Page

3.20 OTHER AREAS CONSIDERED (NON-AREES) 59 3.20.1 No Further Action SWMUs 59

3.20.1.1 Storage Tank for Trichloroethylene (SMWU 44) 60 3.20.1.2 Former Transformer Storage Area (SWMU 17) 60 3.20.1.3 PCB Storage Building 659 (SWMU 33) 60 3.20.1.4 Drummed Radioactive Waste Area (SWMU 9) 60 3.20.1.5 Radioactive Waste Storage Building (SWMU 18) 61

3.20.2 Installation-Based Considerations 61 3.20.2.1 Smaller 90-Day Collection Yards 61 3.20.2.2 General Maintenance Building Condition 61 3.20.2.3 Radon 64 3.20.2.4 UXO 64 3.20.2.5 Spills 64

4.0 HUMAN AND ENVIRONMENTAL RECEPTORS 65 4.1 EXPOSURE TO GROUNDWATER 65 4.2 EXPOSURE TO SURFACE WATER 68 4.3 EXPOSURE TO SOIL 68 4.4 EXPOSURE TO AIR 69

5.0 ENHANCED PRELIMINARY ASSESSMENT FINDINGS AND CONCLUSIONS ... 70 5.1 AREAS WITH MINIMAL POTENTIAL FOR ENVIRONMENTAL

PROBLEMS 70 5.2 SUMMARY OF ENPA FINDINGS AND CONCLUSIONS 70

6.0 REFERENCES 81

APPENDIX A SPILL REPORT

APPENDIX B LIST OF PERSONNEL INTERVIEWED FOR THE ENHANCED PRELIMINARY ASSESSMENT

APPENDIX C PHOTOGRAPHS OF AREAS REQUIRING ENVIRONMENTAL EVALUATION

APPENDIX D BRAC PARCEL ASBESTOS INVENTORY

APPENDIX E BRAC PARCEL PCB-CONTAINING TRANSFORMERS

APPENDIX F UNDERGROUND STORAGE TANK INVENTORY

APPENDIX G BRAC PARCEL ABOVE GROUND STORAGE TANK INVENTORY

APPENDIX H RADON SURVEY

APPENDIX I STATE OF UTAH DEPARTMENT OF ENVIRONMENTAL QUALITY COMMENTS AND RESPONSES

AEC_TEP\D01\FINALENRFNLTEXT.ENP FINAL Rev. 09/25/94; 5:59pm JV

LIST OF TABLES

Table No. Page

2-1 Buildings and Facilities within the BRAC Parcel 7

2-2 Summary of Environmental Investigations at TEAD-N from 1979 to Present 28

3-1 Areas Requiring Environmental Evaluation 34

5-1 Summary of Findings and Recommendations for Further Action 72

LIST OF FIGURES

Figure No. Page

2-1 TEAD-North Location Map 5

2-2 BRAC Parcel 6

2-3 Groundwater Contour Map 23

3-1 Areas Requiring Environmental Evaluation - Maintenance and Supply Area 35

3-2 Areas Requiring Environmental Evaluation - Administration Area 36

4-1 Sources of Contamination for Exposure Media 66

5-1 Areas with Minimal Potential for Environmental Problems 71

AEC_TEP\D01\FINALENP\FNLTEXT.ENP FINAL Rev. 09/09/94; 10:33am V

LIST OF ABBREVIATIONS/ACRONYMS

ACM AGEISS AREE Army AST Bldg. BRAC CERCLA CMF CMS DOD DRMO ENPA EP EPA ERI T FFA FS GAC gal gpd ID IRP IWL IWTP KVA lbs mg/L NA No. NPL OB OD OIWL OSL OU PA PCB PCP ppm RCRA RFI Rl SVOC SWMU TCE

Asbestos Containing Material AGEISS Environmental, Inc. Area Requiring Environmental Evaluation U.S. Army Above Ground Storage Tank Building Base Realignment and Closure Comprehensive Environmental Response, Compensation, and Liability Act Consolidated Maintenance Facility Corrective Measures Study U.S. Department of Defense Defense Reutilization and Marketing Office Enhanced Preliminary Assessment Extraction Procedure U.S. Environmental Protection Agency Environmental Research, Inc. Degrees Fahrenheit Federal Facility Agreement Feasibility Study Granular Activated Carbon gallon(s) gallons per day Identification Installation Restoration Program Industrial Waste Lagoon Industrial Wastewater Treatment Plant Kilovoltamperes pound(s) milligrams per liter Not Applicable Number National Priorities List Open Bum Open Detonation Old Industrial Waste Lagoon Open Storage Lot Operable Unit Preliminary Assessment Polychlorinated biphenyl Post-Closure Permit parts per million Resource Conservation and Recovery Act RCRA Facility Investigation Remedial Investigation Semivolatile Organic Compound Solid Waste Management Unit Trichloroethylene

AEC_TEP\D01\FINALENP\FNLTEXT.ENP Rev. 09/09/94; 3:07pm

FINAL

VI

TCLP TEAD TEAD-N TEAD-S TEAD# TNT TRPH TSCA ng/g USAEC USDEQ-DSHW

USATHAMA USCOE UST UXO VOC

LIST OF ABBREVIATIONS/ACRONYMS (Continued)

Toxicity Characteristic Leaching Procedure Tooele Army Depot Tooele Army Depot - North Area Tooele Army Depot - South Area Tooele Army Depot Number Trinitrotoluene Total Residual Petroleum Hydrocarbons Toxic Substances Control Act micrograms per gram U.S. Army Environmental Center State of Utah Department of Environmental Quality-Division of Solid and Hazardous Waste U.S. Army Toxic and Hazardous Materials Agency U.S. Army Corps of Engineers Underground Storage Tank Unexploded Ordnance Volatile Organic Compound

AEC_TEP\D01\FINALENP\FNLTEXT.ENP Rev. 09/09/94; 10:33am

FINAL

VII

EXECUTIVE SUMMARY

The U.S. Army Environmental Center tasked AGEISS Environmental, Inc. to prepare an Enhanced Preliminary Assessment (ENPA) under Contract DAAA15-93-D-0006, Delivery Order 001 as the first step in the Base Realignment and Closure (BRAC) process. The purpose of this ENPA report is to document the existing environmental conditions associated with a 1,684 acre parcel of Tooele Army Depot - North Area (TEAD-N) that is scheduled for realignment and to provide recommendations for further action.

The objectives of the TEAD-N ENPA are to identify and characterize all areas requiring environmental evaluation (AREEs), including areas that may require a site investigation; areas of environmental contamination that may require remedial action or removal action; other actions that may be necessary to address and resolve all identified environmental problems; and other environmental concerns that may present impediments to the expeditious transfer of applicable property. The ENPA report, prepared from a property transfer perspective, also addresses other environmental concerns not addressed under the U.S. Army's (Army's) Installation Restoration Program, such as asbestos, radon, and polychlorinated biphenyls. The procedures used to meet the objectives of the ENPA investigation included document and aerial photograph review; site visits; personnel interviews; and regulatory review.

This report is not intended to conform to or meet the objectives of current U.S. Environmental Protection Agency guidance for the preparation of Preliminary Assessments under the Comprehensive Environmental Response Compensation and Liability Act (CERCLA). The Army has historically prepared ENPA reports under similar formats for installations undergoing realignment or closure. The ENPA is intended to serve as an environmental baseline survey and a basis for follow-on environmental investigations or remediation.

The Final ENPA report presents a summary and evaluation of the data relevant to the BRAC parcel located at TEAD-N. Within the report, the subject property and its surrounding environment and land uses as well as previous environmental investigations conducted at TEAD-N are described. Nineteen AREEs are identified and characterized. Known and potential releases, conclusions, and recommendations regarding each of the AREEs are included in the discussions. Potential human and environmental receptors of any releases or potential releases are also evaluated and discussed as part of the report. Comments from State regulators on the Draft Final ENPA have been addressed in this final report version and are included as Appendix I to this report.

In this report, 19 AREEs are identified within the BRAC parcel. Phase I Resource Conservation and Recovery Act Facility Investigations (RFIs) are recommended for five of the AREEs, since no evidence of previous investigation was found. Further investigation under ongoing Phase II RFIs is recommended for seven AREEs based on conclusions and data gaps identified under prior investigations. Further action under the ongoing CERCl-A program is recommended for one AREE. Inclusion in the upcoming Corrective Measures Study, with some additional contamination assessment sampling, is recommended for one AREE. Finally, management under installation-based programs is recommended for five AREEs. Areas with minimal potential for environmental problems associated with property transfer are also delineated.


Rev. 10/04/94; 2:10pm VÜi

1.0 INTRODUCTION

Under Contract DAAA15-93-D-0006, Delivery Order 001, the U.S. Army Environmental Center (USAEC) tasked AGEISS Environmental, Inc. (AGEISS) to prepare an Enhanced Preliminary Assessment (ENPA) and conduct an investigation for the realignment of a 1,684 acre, industrialized parcel located in the Tooele Army Depot - North Area (TEAD-N) at Tooele, UT.

1.1 ENPA REGULATORY BACKGROUND

Public Laws 100-526 and 101-510 designated more than 100 U.S. Department of Defense (DOD) facilities for closure and realignment. As a result, it became necessary to investigate and cleanup, as appropriate, environmental contamination at the U.S. Army (Army) Base Realignment and Closure (BRAC) property to facilitate property release and reuse. The BRAC environmental restoration program was established in 1989 when the first round of base closures was announced. Since 1989, subsequent rounds of BRAC properties have been identified through public law every 2 years. The BRAC environmental restoration program is patterned after the Army's Installation Restoration Program (IRP), but has been expanded to include categories of contamination, such as asbestos, radon, polychlorinated biphenyls (PCBs), and other environmental concerns that are not normally addressed under the IRP.

The BRAC environmental restoration program begins by conducting ENPAs. The term "enhanced" is used to distinguish these assessments from the previous Army IRP preliminary assessments (PAs), because the BRAC ENPAs are conducted from a property transfer perspective, and evaluate areas which are not typically included in the IRP (e.g., asbestos, radon, etc.). ENPAs include reviews of existing installation documents, regulatory records, and aerial photographs; site visits and visual inspections; and employee interviews.

In March 1993, the BRAC Commission called for the transfer of the Tooele Army Depot (TEAD) Maintenance Mission, Defense Depot Ogden, Tooele Operations Supply Mission, and the Defense Reutilization and Marketing Office (DRMO) to other DOD installations. Most of the depot industrial (maintenance) and administrative areas, except an enclave of 82 acres around the TEAD Headquarters and the ammunition storage areas, are included in the 1,684 acre parcel to be excessed.

1.2 OBJECTIVES

The objectives of the TEAD-N ENPA are to identify and characterize all areas requiring environmental evaluation (AREEs) including areas that may require a site investigation; areas that may require remedial or removal action; other actions that may be necessary to address and resolve all identified environmental problems; and other environmental concerns that may present impediments to the expeditious transfer of the applicable property.

It should be noted that the Army's ENPA is not intended to conform or meet the objectives of current U.S. Environmental Protection Agency (EPA) guidance for the preparation of PAs under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The Army has historically prepared ENPAs under similar formats for installations undergoing realignment or closure. Thus, the ENPA is intended to serve as an environmental baseline survey and or basis for follow-on environmental investigations or remediation.

AEC_TEP\D01\FINAL.ENP\FNLTEXT.ENP FINAL Rev. 09/09/94; 10:33am 1

1.3 PROCEDURES

The procedures used to conduct the ENPA investigation are discussed in this section. The procedures consist of document and aerial photograph review; site visits; and regulatory review, as discussed below.

1.3.1 Document Review

As part of the ENPA, AGEISS reviewed all available reports related to the ongoing CERCLA and Resource Conservation and Recovery Act (RCRA) investigations, as well as earlier environmental reports prepared for TEAD-N. Installation surveys for asbestos, PCBs, radon, and Underground Storage Tanks (USTs) were obtained and reviewed. The installation's spill report file was also reviewed. The updated spill report summary is provided in Appendix A.

Environmental Research Inc. (ERI) prepared an Aerial Photographic Site Analysis of the BRAC Parcel - Tooele Army Depot-North, Utah (ERI, 1993). In the report, an analysis was performed using aerial photography of the BRAC parcel from 1939 to 1987 which was not included in two previous installation aerial assessment reports dated January 1982 and July 1986. Photography from 1939,1974,1977,1978, and 1987 was analyzed for the Maintenance and Supply Area portion of the BRAC parcel and included in the report. For the analysis of the Administration Area portion of the BRAC parcel, aerial photography from 1939, 1952, 1953, 1959, 1960, 1966, 1974, 1977, and 1987 was analyzed. Potential environmentally significant findings noted during this aerial photographic analysis include staining in open storage areas, former drain fields, trenches containing debris, and excavations. Specific descriptions of features pertaining to the BRAC parcel are discussed in Section 2.3. It should be noted, however, that these descriptions are interpretations and that ground-truthing is necessary for confirmatory purposes (ERI, 1993).

The EPA 1982 photographic interpretation of TEAD-N was reviewed to determine possible areas of past use, storage, treatment, and disposal of potentially toxic and hazardous materials within the BRAC parcel. This study analyzed aerial photographs from 1953,1959, 1966, and 1981. Results of this study affecting the BRAC parcel are also incorporated into Section 2.3 of this report.

1.3.2 Site Visits

AGEISS conducted three site visits at TEAD-N. The first two were conducted on October 12 through 14, 1993 and October 25 through 28, 1993. The purpose of these two site visits was to obtain additional information through direct observation and interviews with personnel familiar with the property and its operations and history. During the site visits, visual inspections of the BRAC parcel were conducted; documents and inventories available at the installation were obtained and reviewed; other relevant data from the State and county government regulatory agencies were obtained; and personnel interviews were conducted. A list of personnel interviewed is provided in Appendix B. A third site visit was conducted on August 23, 1994. During this follow-up visit, additional information was gathered concerning the approximate 100 acres to the west and southwest of the Maintenance and Supply Area that was recently added to the BRAC parcel and is included in this Final ENPA.


Rev. 09/09/94; 10:33am 2

1.3.3 Regulatory Review

The regulatory status of the BRAC parcel at TEAD-N was examined to determine the existence of and compliance with, for example, consent decrees, permits, injunctions, restraining orders, and memoranda of understanding or agreement. As part of this process, EPA Region VIII and the State of Utah's CERCLA and RCRA files were reviewed, and regulatory officials were interviewed.

Also, the Draft Final Report was reviewed by regulatory officials at the State of Utah Department of Environmental Quality-Division of Solid and Hazardous Waste (USDEQ- DSHW). These comments have been addressed and incorporated in this final version of ENPA. The regulatory comments and responses are included in Appendix I.

1.4 REPORT FORMAT

This ENPA report presents a summary and evaluation of the data relevant to the ENPA for the BRAC parcel located at TEAD-N. Section 2.0 describes the property and its surrounding environment and land uses as well as previous environmental investigations conducted at TEAD-N. Section 3.0 identifies and characterizes AREEs at the site, known and potential releases associated with AREEs, and conclusions and recommendations regarding AREEs. Section 4.0 discusses potential human and environmental receptors of any releases. Section 5.0 summarizes the findings and conclusions, discusses the quality and reliability of the supporting information, identifies areas requiring further action, and, as appropriate, suggests how such actions can be accomplished. Section 6.0 provides the references, and the appendices contain summary information obtained during the site visits.

AEC_TEP\D01\FINALENP\FNLTEXT.ENP FINAL Rev. 09/09/94; 10:33am 3

2.0 PROPERTY CHARACTERIZATION

TEAD-N's location, history, and environmental setting are discussed in this section. This information is provided specifically for the BRAC parcel whenever possible.

2.1 PROPERTY LOCATION

TEAD-N is located in Tooele County, UT (Figure 2-1). TEAD-N is located within the Tooele Valley in the central portion of northern Utah, immediately west of the town of Tooele, about 35 miles southwest of Salt Lake City. The BRAC parcel that is the subject of this investigation is actually two geographically discrete parcels located within the industrialized land in the northeastern portion of TEAD-N (Figure 2-2).

2.2 HISTORICAL BACKGROUND

TEAD was established in 1942 as the Tooele Ordnance Depot by the Army Ordnance Department. TEAD-N was redesignated as such in 1962. Both the North and South Areas of TEAD are major ammunition storage and equipment maintenance installations that support other installations throughout the western U.S. The first mission for Tooele Ordnance Depot was to store vehicles, small arms, and fire control equipment for export. Other mission functions included overhauling and modifying tanks and track vehicles and their armaments. In general, Tooele was designated as a backup depot for Stockton Ordnance Depot and Benicia Arsenal, both in California.

In 1970, TEAD-N assumed maintenance mission responsibilities for topographic equipment, troop support items, construction equipment, power generators, and serviceable assets from the Granite City Army Depot in Illinois which was subsequently closed. In the 1980s, the maintenance missions at TEAD included the repair of tactical wheeled vehicles and power generation equipment. Along with these missions, all the secondary items of the components were rebuilt including engine and power trains. Approximately 4,500 engines and 12,000 power train components were overhauled each year.

The current mission of TEAD-N is to receive, store, issue, maintain, and dispose of munitions; to provide equipment maintenance and repair; to provide installation support to attached organizations; and to operate other facilities as assigned. TEAD-N covers an area of about 24,732 acres, and developed features include igloos, magazines, administrative buildings, industrial-maintenance areas, military and civilian housing, roads, hardstands for vehicle storage, and other allied infrastructure.

2.3 DESCRIPTION OF BRAC PARCEL

The BRAC parcel that is the subject of this investigation is actually two geographically discrete parcels located within the northeastern portion of TEAD-N. The largest parcel covers most of the Maintenance and Supply Area, while the smaller parcel is located in the Administrative Area (Figure 2-2). The area has many buildings and storage facilities, as discussed below and listed in Table 2-1.


Great Salt Lake

Tooele.

TEAD North

LEGEND

Interstate Route

Ig U.S. Route

State Route

NOT TO SCALE

Source:

Weston, 1990

(modified)

Great Salt Lake Desert

To Provo, UT

Prepared for:


Date Revised: 09/09/94 l:\AEC_TEP\D01\FINAL.ENP\CADGIS\EF2-1.DWG

Figure 2-1

TEAD—North Location Map

Prepared by: AGEISS Environmental, Inc. FINAL

TOOELE NORTH AREA

INSTALLATION BOUNDARY

MAINTENANCE AND

ADMINISTRATION

AREA

LEGEN

BRAC Par

Installatioi

Roods an

Trail and

T\

SCALE

FEET

SOURCE: Office of the Fac

(modified)

Tooele Army Depot

Tooele, Utah

Prepared for:

U.S. Army Environmental C

Dote Revised: 09/09/94 l:\AEC_TEP\D01\FINALENP\CADGIS\

Figure 2-2

BRAC Parcel

Prepared by: AGEISS Environmental,

TOOELE NORTH AREA

INSTALLATION BOUNDARY

MAINTENANCE AND

ADMINISTRATION

AREA

LEGEND

BRAC Parcel Area

Installation Boundary

Roads and Parking

Trail and Earth Road

IN

SCALE

0 5000

FEET

SOURCE: Office of the Facilities Engineer, 1991 (modified) Tooele Army Depot Tooele, Utah

Prepared for:


Dote Revised: 09/09/94 l:\AEC_TEP\D01\FINAL.ENP\CADGIS\EF2-2.DWG

Figure 2-2

BRAC Parcel

Prepared by: AGEISS Environmental, Inc. FINAL

Table 2-1. Buildings and Facilities within the BRAC Parcel. Page 1 of 8.

Bldg. No. Use/Name Year Built

' 100 Inspection Center 1992

S-101 Reserve Component 1945

S-103 Post Chapel 1943

S-104 Pub and MARTEC Cleaning Service Headquarters 1943

S-108 Dining Hall 1981

109 Administration and Support Building 1985

S-110 Administration Building 1943

S-111 Barracks 1943

112 Officer's Quarters 1985

S-113 Environmental Management Office 1943

114 Barracks 1985

S-115 Industrial Risk Management Directorate Office 1943

116 Barracks 1985

S-117 Administration Building: Safety Office 1943

S-118 Barracks 1943

S-119 Barracks 1943

\ S-120 Barracks 1943

S-121 Barracks 1943

S-122 Barracks 1943

S-123 Administration and Support Building 1943

S-124 Barracks 1943


S-126 Barracks 1943

S-139 Officer's Quarters 1985

S-141 Barracks 1943

S-143 Barracks 1943

S-145 Barracks 1943



S-150 Barracks 1943

S-151 Barracks 1943

S-152 Barracks 1943

, S-153 Post Exchange 1945

NOTE: An acronym list is provided on the last page of this table.

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FINAL


Bldg. No.

S-155

S-159

160

161

162

163

250

253

576

581

582

586

587

588

T-589

S-590

S-592

S-593

S-595

596

597

600

600-A

600-B

600-C

S-601

602

603

S-604

S-605

S-606

607

S-608

Use/Name

Bowling Center

Trap and Skeet Range Shed

Skeet Release Structure


Trap Release Structure


Water Tank

Water Tank

Hazardous Materials Storage Warehouse

Water Tank

Fuel Oil Tank

Topographic Test Range Station

Vehicle Remanufacturing Shop

Office at 90-Day Yard

Hazardous Materials Office

Technical Procedures Development Shop

NA

Concrete arch over railroad tracks

Administration

Power Substation

Compressor Room

General Purpose Maintenance Shed

Vacant/Parts Storage Facility

Storage Warehouse

Solvent Recovery Facility

Restricted Access/Maintenance Facility

Maintenance Facility/vehicle parts lubrication and preservation

Tire Repair and Recapping Shop

Power Train Rebuild Shop

Silk Screen Shop; Dark Room; Print Shop

Boiler Plant

Maintenance and Repair Shop

Machining and Welding Shop

Year Built

1945

1957

1981

1981

1981

1981

NA

NA

1962

NA

NA

1970

1971

1987

1968

1943

1943

NA

1944

NA

1963

1943

NA

NA

1988

1943

1943

1943

1943

1943

1943

1943

1943


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FINAL



S-609 Maintenance Facility: steam cleaning; metal stripping; radiator repair shop 1943

S-610 Boiler Plant 1943

S-610A Wash Facility 1992

S-611 Vacant Maintenance Facility: vapor degreasing, cleaning, and lubricating parts; paint shop; small arms firing range

1943

S-611A Pump Station 1977

612 Paint Shop 1943

613 Sheet Metal Shop 1943

613A General Storage Shed 1942

S-614 Maintenance Facility: Etching and rinsing plates; Administration 1943

615 Maintenance Facility: Metal stripping, cleaning, anodizing and electroplating; vapor-degreasing; spray painting

1956

615C Storage Shed NA

615D Paint Storage NA

615-PI NA 1943

S-616 Union Offices 1943

S-617 Electrical Shop; Millwrights Shop 1943

S-618 Lunch Room 1943

618-A Concrete Slab NA

619 Vehicle Manufacturing Facility 1943

S-620 Battery Repair and Charging Shop 1943

S-621 Carpentry Shop 1943

S-621R Change House NA

622 Credit Union 1977

623 Chromic Acid/Alodine Drying Beds NA

624 Maintenance Shed 1966

626 Combat Vehicle Test Track NA

626F Boat Testing Pool NA

627 Change House; Lunch Room 1973

628 Cable House 1943

S-629 Gas Station Complex 1943

S-630 Shipping & Receiving 1943

S-631 Shipping & Receiving 1943


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FINAL




632 Structure Associated with Recycled Water Tank 1992

633 Concrete Vehicle Ramp NA

637-A NA 1943

637-B NA NA

637-C NA NA

S-637 Engine Rebuild Facility 1943

S-638 Storage Shed 1962

S-639 Body Shop; Steam Cleaning 1943

S-640 General Purpose Warehouse 1943



S-647 Vehicle Storage; Vacant Paint Shop 1943







655 Transportation Offices; Lunch Room 1968

656 Standby Generator 1976

S-657 General Purpose Warehouse; Vehicle Storage Facility 1943










S-671 Administration 1943

S-672 Administration; Lunch Room 1957


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FINAL 10




S-674 NA NA

S-675 General Storehouse 1948

S-676 Covered Walkway NA







690 Storage Shed NA

691 Vehicle Rebuild 1983


S-694 Change House 1977



710 Wastewater Treatment Plant: Inflow Pumphouse 1987

711 Wastewater Treatment Plant: Emergency Power Generation Station 1987

712 Wastewater Treatment Plant: Treated Water Outflow Pumphouse 1987

713 Wastewater Treatment Plant: Contractor Structure Housing Air Strippers and Other Equipment (not owned by the government)

1987

714 Wastewater Treatment Plant: Hazardous Materials Storage (not owned by the government)

1987

715 Wastewater Treatment Plant: 90-Day Storage Yard 1987

716 Wastewater Treatment Plant: Process/Treatment Equipment 1993

S-735 Flammable Materials Storehouse 1944

S-752 Vacant/Instrument Building t964

S-753 Vacant Office/Instrument Building 1944

804-928 125 Round Tanks - Vehicle Storage 1947

1000 Police Station; Aces Facility; Administration; Print Plant; Photo Lab 1943

1001 Administration 1943

1002 Gymnasium 1943

1004 Arts & Crafts Center 1943



FINAL


Bldg. No.

1005

1006

1008

1009

1010

1011

1020

1110

1111

1112

NA

NA

NA

NA

2000

2001

2002

2003

2004

2005

2006

2007

2008

S-2009

S-2010

2011

2012

2013

2014

2015

2016

2020

S-2025

Use/Name

Auditorium

Pump Station

Recreation Building

Oquirrh Travel Camp

Credit Union

Recreation Building

Swimming Pool

Recreation/Stables

Recreation/Stables

Recreation/Stables

Skeet and Trap Range

Concrete Slab

Tooele Valley High School

Utah National Guard

DRMO: Storage Shed

DRMO: Storage Shed

DRMO: Storage Shed

DRMO: Hazardous Materials Storage

DRMO: Saleable Items Warehouse


DRMO: Salvage & Surplus Property

DRMO: Salvage & Surplus Property


DRMO: Property Management Branch Office

Administration

DRMO: Paperwork Archiving

DRMO: Auction House

DRMO: Inert Ordnance Storage

Open Storage

Open Storage

Scale House

Reutilization Office

90-Day Hazardous Waste Storage Building

Year Built

1943

1943

1978

NA

1972

1981

NA

1979

1968

NA

NA

NA

NA

NA

1976

1976

1976

1976

1976

1976

1976

1976

1958

1958

1986

1946

1943

1962

NA

NA

1981

1989

1943


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FINAL


J Bldg. No. Use/Name Year Built

I NA Consolidated Maintenance Facility 1992

NA 25 Ton Bridge Crane NA

OSL 509 (1-6) Open Storage NA


OSL 615 (1-3, 5, 6) Open Storage NA

OSL 623 Open Storage NA







OSL 655 (1-8) Open Storage/Recycling Operations NA




1 OSL 673 Open Storage NA
















|| OSL 802 Open Storage NA



FINAL


Bldg. No. Use/Name Year Built |


OSL804 Open Storage NA















OSL 840 Open Storage NA |















Bldg. Building BRAC Base Realignment and Closure DRMO Defense Reutilization and Marketing Office NA Not Available No. Number OSL Open Storage Lot

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DRAFT FINAL

2.3.1 Maintenance and Supply Area

The BRAC property that lies within the Maintenance and Supply Area contains the following facilities: open storage lots (OSLs), storage warehouses, the Consolidated Maintenance Facility (CMF), various maintenance facilities, the Solvent Recovery Facility, the 90-Day Drum Storage Area, other drum storage areas, the DRMO, the Industrial Wastewater Treatment Plant (IWTP), and the Combat Vehicle Test Facility.

2.3.1.1 Open Storage Lots

The OSLs in the BRAC parcel are generally located to the west of the supply warehouses, with some located in the center of the warehouses and to the east of the facility, between the DRMO and the installation's boundary. The majority of the OSLs, excluding those along the eastern boundary of the facility, are used for storing various types of material and military equipment. Material and equipment are stored, generally on a temporary basis, for rehabilitation or future permanent storage. A grid road network serves these areas, which are predominantly gravel-covered earth surfaces. During the site visits, these OSLs were inspected via a windshield survey. The lots appeared clean and well-maintained. Review of historical aerial photographs indicated some ground stains and ground disturbances in the OSLs (ERI, 1993).

The OSLs to the east, between the DRMO and the Combat Vehicle Test Facility and the installation boundary were also inspected during the site visits via a windshield survey. These OSLs did not contain vehicles or equipment of any kind, nor was there a well-defined grid road network. Rather, these areas consisted of open fields with no indications of vegetation stress or other such indicators of disturbance. These areas do not appear to have been used for open storage recently, if at all, based on conditions observed during the windshield survey. Review of aerial photographs dating back to 1939 also did not reveal any areas of environmental concern (ERI, 1993).

The OSLs to the west and southwest, between the CMF and the western BRAC boundary were first inspected during the October 1993 site visits. These areas were inspected again during the August 24, 1994 visit as a result of the BRAC parcel expansion which included additional acreage to the west and southwest of the CMF. During this additional site visit, no evidence of ground-staining or vegetation stress was noted. Review of aerial photographs and information contained in the Phase II study of known-release Solid Waste Management Units (SWMUs) indicated historical disturbances such as conveyance ditches and lagoons. Based on this new information, many of these OSLs and former drainage ditches and lagoons to the west and southwest are included as AREE 18. (REI, 1994b).

2.3.1.2 Warehouses

The warehouses, which were mostly constructed in the 1940s, are used for long-term storage of specialized vehicles and other military equipment. There are 125 round "tank" warehouses at the north end of the area used for long-term storage of specialized vehicles. They have controlled humidity and a series of metal tanks with sealed doors which allow a controlled atmosphere for long-term storage. The supply area contains 26 large general-purpose warehouses for additional storage of equipment and supplies of TEAD-N. The area is served by both truck and rail. During the site visit, all 26 warehouses and two of the round "tank" warehouses were inspected. With the exception of Buildings 594, 659, and 691, all of the

AEC_TEP\D01\FINALENP\FNLTEXT.ENP FINAL Rev. 09/09/94; 3:02pm 15

warehouses appeared to be clean, well maintained, with no current or historical evidence of storage of hazardous substances, petroleum, or petroleum derivatives. Additionally, personnel interviewed and review of aerial photographs support this conclusion. Buildings 594 and 659 are the two warehouses that were and are currently used for storage of hazardous substances, petroleum, or petroleum derivatives. Building 691, which contains an oil/water separator, is the site of steam cleaning, some vehicle maintenance, and other limited industrial activities.

2.3.1.3 Maintenance Buildings and Facilities

The CMF is located adjacent to the western side of the warehouses. This facility was completed in 1992 to consolidate and upgrade vehicle remanufacturing operations. Activities performed on military vehicles at the CMF include: receiving; unpacking; pre-cleaning; disassembly; cleaning; sand blasting; testing; component and electrical rehabilitation; machining; power train, engine and power generation assembly; painting; preservation and packing; and shipping. The CMF was designed to update and streamline these processes; minimize the use of hazardous materials and the generation of hazardous wastes; and reduce the potential for a release of contamination. The CMF was designed to operate in accordance with all applicable Federal, State, and local environmental regulations. An on-site wastewater treatment plant is present at the CMF to treat effluent generated during vehicle remanufacturing and related operations. Treated water from the on-site wastewater treatment plant is piped to the recycled water tank (632T) where it is reused by the Maintenance and Supply Area. Conditions observed during the site visits indicate that the CMF is operating according to the design objectives. Extremely clean housekeeping practices were also observed through the CMF during the site visits. Based on these observations combined with the environmental emphasis incorporated into the CMF design and operation, contamination from this facility is not suspected.

The maintenance buildings, mostly constructed in the 1940s, are located at the south end of the Maintenance and Supply Area. These facilities accommodate sand blast areas, paint dunnage, equipment maintenance, repair, handling, and inspection. Altogether, there are 877,776 square feet of building space within this area, which is served by both truck and rail (EAESTI, 1988). The primary activities which occur in the maintenance buildings are related to major (military vehicles, etc.) and secondary (generators, compressors, etc.) item remanufacture. Some current deficiencies and many past practices in the maintenance structures have resulted in potential residual building contamination which is discussed in Section 3.20.

Historical information, on-site inspections, and TEAD-N personnel interviews performed during the ENPA investigation indicated that many of the maintenance structures have housed a variety of activities throughout their operating history. For example, Building 618, presently the lunch room, was formerly a battery shop and painting operations. Building 616, which currently houses union offices, was at one time a fire station. Conditions as they were observed during the site visits are therefore considered to represent only a single point in time. Historical research and interviews with long-employed TEAD-N personnel were conducted during the ENPA investigation to provide information regarding past practices so that a more complete assessment of the varied history of the maintenance buildings could be evaluated with respect to AREE identification. A list of personnel interviewed during the ENPA investigation is included as Appendix B of this report.


The Solvent Recovery Facility is located at the southwest corner of the Maintenance and Supply Area in Building 600C. This facility was constructed in 1988, and has been used to recycle Stoddard solvent, trichloroethylene (TCE), paint thinner, antifreeze, and used oil filters throughout its operating history. The Solvent Recovery Facility was observed to be in excellent condition during the site visits. This facility has been identified as a no further action SWMU and is not identified as an AREE.

The 90-Day Drum Storage Area (SWMU 28) is a 3.4-acre fenced lot located near the southern end of the Maintenance and Supply Area. Buildings 588, 596, and 656 are located within the fenced area. Currently, drummed wastes including gasoline, phosphonic acid, sodium hydroxide, paint wastes, thinners, solvents, paint filters, blast grit, used oil, and antifreeze, are stored above ground on pallets in this area. Visual inspection and review of historical aerial photographs have indicated that no ground staining or standing liquid is evident at this site (MW, 1993). However, Phase I RCRA Facility Investigation (RFI) sampling indicates that activities at this SWMU have released contaminants to the environment. For this reason, the 90-Day Drum Storage Area has been included as AREE 16 in this report and is discussed in detail under Section 3.16.

The Drum Storage Areas (SWMU 29) consists of two areas located near the southern end of the Maintenance and Supply Area. The two areas are separated by the Maintenance and Supply Road. The southern area (also known as the old lumber yard) is a fenced, 25-acre expanse of gravel and broken asphalt surface with a single warehouse (Building 576) and one smaller associated office facility (Building 589). Historical aerial photographs show that the southern part of SWMU 29 has been used for the storage of drums, as well as cylinders, tanker trucks, and lumber (EPA, 1982). The northern part of SWMU 29 is a triangular-shaped, sparsely-vegetated, open area of approximately 5 acres. A 1953 aerial photograph shows drums stored in this area, while aerial photographs taken in 1959 and 1966 indicate that the drums were removed and that the area was unoccupied. In 1981, an aerial photograph shows debilitated vehicles stored in the western part of the northern area (EPA, 1982). SWMU 29 has been identified as AREE 17 in this report, because environmental contamination is known to exist at this site. An extensive discussion of SWMU 29 is included in Section 3.17.

The DRMO, located adjacent to the eastern side of the warehouses, consists of an open storage yard and several steel buildings. This area is used for temporary storage of surplus material (no longer in use at the installation), prior to sale. The area is provided with rail and truck access. Environmental contamination is known to exist at the DRMO, and this area has been identified as AREE 8 and is discussed in detail under Section 3.8.

The IWTP is located within the southwest comer of the BRAC parcel. According to Mr. Pat . Sullivan, the Chemical Engineer in charge of the IWTP who was the Facilities Office escort during the on-site inspection, the design capacity of the treatment facility is 160,000 gallons per day (gpd). Several structures and holding tanks are present at the IWTP complex. The majority of this facility was built in 1987; however, an additional structure, Building 716, was built in 1993. The facility treats an average of 116,000 gpd. Approximately 103,000 gpd of treated wastewater from the IWTP is piped to the recycled water storage tank (632T) located in the Maintenance and Supply Area. This water is then reused for maintenance area operations. The remaining water is released to the City of Tooele publicly-owned treatment works. The IWTP has been identified as AREE 9, and it is discussed in detail in Section 3.9.


The Combat Vehicle Test Facility is located east of the Maintenance and Supply Area and south of DRMO. This facility is used to determine specifics regarding the status of vehicles prior to repair, and to test the performance of vehicles following remanufacture. This facility includes an asphalt test track with obstacles, an inclined brake testing area, and a test pool for boats and amphibious vehicles. The Combat Vehicle Test Facility has been identified on aerial photographs as a "stained area" (ERI, 1993). However, visual inspection of the site during the ENPA site visits indicated that the dark area on the photographs interpreted as a stain may have been asphalt, since the track is currently paved. A maintenance shed, Building 624, is also present at the facility. Vehicles were observed in the shed during the site inspection of the vehicle test facility, however, only light maintenance activities appeared to be conducted in this structure. Additionally, a recycled industrial water tank (632T) and an associated structure (Building 632) are also located near the center of the test track at the facility. Treated water from the IWTP is pumped uphill to the recycled water tank for storage prior to reuse in the Maintenance and Supply Area. No evidence of leaks, overfills, or other releases of the recycled water were observed during the site inspection of the test facility. Significant quantities of hazardous substances and wastes, including waste oil, were not observed during the site inspection at the Combat Vehicle Test Facility, nor were indications of poor housekeeping, spills, or other practices which could potentially produce a hazardous release. Thus, this facility was not designated as an AREE.

2.3.2 Administrative Area

The BRAC property that lies within the Administrative Area currently contains the following facilities: several administration buildings; old barracks; police station; print plant; photographic laboratory; gymnasium; swimming pool; crafts building; several recreation buildings; the Utah Army National Guard; the Army Travel Camp; a trap and skeet range; vertical water tanks; and horse stables. Aerial photograph review indicates that the part of the Administration Area south of the Main Entrance Road was also previously used for residential purposes. The residential area has since been dismantled. Other features noted in the aerial photographic site analyses indicated disturbed ground, trenches with debris, dark-toned areas with unidentified material, a probable drain field, a liquid impoundment, and mounded material at various locations in the Administrative Area. During the site visits the facilities listed above were inspected. Visual inspection of the facilities and surrounding land indicated no current or historical evidence of contaminant releases to the environment, with the exception of USTs and above ground storage tanks (ASTs) used for heating oil storage at numerous locations. These USTs and ASTs are discussed further as AREEs 12 and 13 in Sections 3.12 and 3.13, respectively. Additionally, the debris trenches and probable drain field are discussed further as AREE 14 in Section 3.14. Ground truthing by installation and USAEC personnel indicated no evidence of the impoundment (Oliver, 1994).

2.4 ENVIRONMENTAL SETTING

Descriptions of TEAD-N's environmental setting include demographics and land use, climate, physiography, surface water, soils, geology and hydrogeology, flora and fauna, and archeological resources. This information was taken largely from the Preliminary Assessment/ Site Investigation Final Report (EAESTI, 1988).

AEC_TEP\D01\FINALENP\FNLTEXT.ENP FINAL

Rev. 09/09/94; 10:33am 18

2.4.1 Demographics and Land Use

TEAD-N is located in Tooele County, which is one of five counties comprising the Wasatch Front Multi-County Planning District. Tooele County, west of Salt Lake City, has exhibited a slower growth rate than most other Wasatch Front Counties. The lack of significant employment generators and the arid nature of this county have prevented large population concentrations. In addition, the heavy federal ownership of land in this part of the state reduces the acreage available for private development.

Population growth in Tooele County has been subject to major fluctuations, directly reflecting mining and military activities. From 1950 to 1970, the total county population increased 47 percent, from 14,636 to 21,545. Time periods of the highest population increases (1950 through 1952; 1961 through 1963; and 1965 through 1968) were related directly to government military employment connected with war activity in Korea and Vietnam. From 1970 to 1990, the total county population increased only 23 percent from 21,545 to 26,601 (UDH, 1993).

Within Tooele County, growth is concentrated in areas along Interstate 80 and in proximity to TEAD-N. With the exception of the cities of Tooele (population 13,887), Grantsville (population 4,500), and Stockton (population 426), the area surrounding TEAD-N is largely undeveloped, with predominately grazing and limited cultivation occurring (UDH, 1993). The town of Grantsville is located approximately 2 miles north of the northwest comer of TEAD-N; the City of Tooele lies adjacent to the northeast comer; and Stockton is located approximately 2 miles to the south along State Highway 36.

TEAD-N is bounded on the north by Farm Road 112; north of the road is the Tooele County Landfill, open land used for agricultural purposes, and a salvage company. To the east of the installation, there is a right-of-way for the Union Pacific Railroad and another salvage yard. Additionally, the Tooele City Commercial Park lies to the east. The park contains the Tooele Municipal Airport, some light manufacturing companies, and a construction company. There is also some residential development that abuts the northeastern boundary of TEAD-N. The installation is bounded on the southeast by State Highway 36. South and west of TEAD-N, properties are used primarily for rangeland grazing.

2.4.2 Climate

TEAD-N has hot, dry summers, cool springs and falls, moderately cold winters, and a general year-round lack of precipitation. Precipitation that does occur usually does so in the form of snow between early fall and late spring. Grantsville receives an average of 11 inches of precipitation, and Tooele receives 16.5 inches of annual precipitation (EAESTI, 1988). The average annual temperature ranges from a high of 80 degrees Fahrenheit (°F) in July to a low of 30 T in January (EAESTI, 1988).

Low humidity is a characteristic of the valley climate and visibility is generally good. During winter months, however, storm fronts are usually followed by high pressure fronts occasionally lasting for several weeks. These fronts trap the cold air in the valley, creating temperature inversions which can create significant fog and smog problems.

The Salt Lake Basin forms a large, generally enclosed air basin of 7,500 square miles. The Great Salt Lake is a shallow body of water covering approximately 2,000 square miles, which


is large enough to drive a classical sea-breeze circulation. The sea-breeze circulation moving through the air basin is called the local wind circulation. The local wind circulation is caused by the uneven heating and cooling of the land and water surface. This diurnal wind tends to blow downslope towards the lake at night, when the lake is warmer than the land. During the daytime, when the land is warmer than the lake, the winds flow upslope into the valleys and mountains. This tends to cause a mixing of air in the center of the lake along a north-south axis during the day. The local wind circulation is the predominant wind factor in the basin and winds rarely exceed 10 miles per hour, although passing storms cause higher wind velocities. The local wind circulation produces a constant interchange of air in the basin, but only limited exchange with air external to the basin.

2.4.3 Physiography

The topography of TEAD-N and surrounding area is illustrated in Figure 2-1. TEAD-N is located in Tooele Valley, a northward plunging structural basin flanked by coalescing alluvial fans that slope generally to the north at about 40 feet per mile and have been greatly modified by the shoreline erosion of Lake Bonneville (Everitt and Kaliser, 1980). The valley is bordered on the north by the Great Salt Lake at an elevation of 4,200 feet. The valley is bordered by the Oquirrh Mountains to the east and the Stansbury Mountains to the west. Maximum elevations of these mountains are 10,350 and 11,031 feet, respectively. Tooele Valley is separated from Rush Valley to the south by South Mountain, a low transverse divide, and by the Stockton Bar, which was deposited by Lake Bonneville during the Pleistocene Epoch.

2.4.4 Surface Water

There are five perennial streams in Tooele Valley, with a combined water yield of about 13,930 acre-feet per year (Razem and Steiger, 1981). These streams originate in the mountains and disappear in the valley floor. Two of these originate in the central Oquirrh Mountains and enter the valley near Tooele, and three originate in the central Stansbury Mountains on the west side of the valley. South Willow Creek is on the northwestern boundary and is the largest of the streams in the Tooele Valley, with an annual flow of 4,830 acre-feet. Box Elder Wash has an annual flow of 900 acre-feet and enters the TEAD-N as an intermittent stream in the southwest, crossing from south to north. There are also four large springs in the central Tooele Valley several miles north and northeast of the facility boundary. Their combined flow is about 17,000 acre-feet. A few minor seeps also occur in the basin, but none within the TEAD-N. The streambeds located within the Depot boundaries carry intermittent flow from perennial streams originating in the surrounding mountains.

No perennial streams exist on the North Area of TEAD. However, perennial reaches of streams exist southeast and southwest of the North Area in South Willow, Box Elder, and Settlement canyons. The perennial flow of these streams infiltrates the alluvial fan materials before reaching the valley floor which lies to the north of TEAD (EAESTI, 1988).

Storm runoff drainage systems have been constructed in several areas of TEAD-N. The drainage from these systems ends in spreading areas or natural drainage channels on base property. The stormwater drainage in the Maintenance and Supply Area of the BRAC parcel is accomplished by an interconnected system of open drainages, drainage manholes, catch basins, and storm sewer mains. Stormwater drainage in the Administration Area of the BRAC parcel occurs via a similar system. Storm sewer mains in both the Maintenance and Supply Area and the Administration Area are constructed of predominantly vitrified clay, concrete, and


steel. Stormwater drainage systems in both areas of the BRAC parcel direct runoff in a general northwest direction.

2.4.5 Soils

Soil characteristics within Tooele Valley largely result from the past inundation of the valley bottoms by Pleistocene lakes. Increasing amounts of salt were deposited in the soils of the Great Basin valleys by drying lakes in the Holocene Era. Today, the valley bottoms tend to be saline, the middle slopes slightly saline, and the upper parts of the valleys nonsaline.

TEAD-N has mostly mature desert soils, aridosols, which are arable and non-saline. However, the soils are generally low in fertility and are farmed only under irrigation. Hydraulic conductivities of the soil in the TEAD-N area range from 1x10"2 to IxlO"4 centimeters per second (JMM, 1992).

Eight primary soil series have been identified on TEAD-N by the Soil Conservation Service. Three of these are found on the BRAC parcel. The Abela very gravelly loam occurs over the Maintenance and Supply Area. This soil is developed in alluvium derived primarily from limestone and quartzite and occurs on slopes of 1 to 8 percent. The Doyce loam and Lakewin series occurs over the Administration Area (JMM, 1992).

2.4.6 Geology and Hvdroqeoloqy

TEAD-N is located in the Great Salt Lake Basin, a large interior drainage basin within the Basin and Range Geologic Province, approximately 35 miles west of the Wasatch Fold and Fault Belt of the Overthrust Geologic Province. The Basin and Range Province is characterized by large fault blocks that trend approximately north to south. Movement along these fault blocks caused the formation of large interior drainage basins with extensive alluvial and lacustrine deposits and exposed rocks ranging in age from Pre-Cambrian and Cambrian (approximately 600 million years ago) to Tertiary and Quaternary. Interspersed within these rocks are igneous (volcanic) rocks of geologically recent age (Tertiary) intruded into the fault block mountains simultaneously with fault displacement (Moore and Sorensen, 1979). Alluvial and lacustrine sediments lie in the valleys between these fault block mountains and were deposited as pediment slopes from mountain drainage courses and as lake bed deposits in the large inter-mountain Lake Bonneville of the late Tertiary Period. Regional Basin and Range tectonism has resulted in the formation of a variety of economic mineral deposits which are extensively mined in the general area of TEAD.

The valley fill deposits consist of an older sequence of Tertiary age and a younger sequence * of Quaternary age. The older sequence comprises the Salt Lake Group and consists of moderately consolidated sand, gravels, silts, and clays with an abundance of volcanic ash (Everitt and Kaliser, 1980). The group is characterized by considerable deformation by tectonic processes. The younger sequence of the valley fill unconformably overlies the Salt Lake Group and consists of relatively unconfined deposits of mostly unconsolidated sand, gravel, silt, and clay of Quaternary age (Everitt and Kaliser, 1980). This sequence includes pre-Lake Bonneville alluvium of Pleistocene Age, Lake Bonneville deposits of Pleistocene Age, and deposits of recent age which include alluvium, lake beds, and dune sands.

The surficial geology of TEAD-N is generally composed of lacustrine, colluvial, and alluvial sediments. The unconsolidated alluvium is typical of alluvial fan deposits consisting of poorly


sorted, clayey, silty sand, gravel and cobbles. The sand grains, gravel, and cobbles are composed of limestone, sandstone, and quartzite eroded primarily from the mountains surrounding TEAD-N. Little bedrock is exposed at TEAD-N. The most significant bedrock features are a series of limestone and quartzite outcrops located in the northeastern portion of the depot. These rocks are similar to the late Paleozoic rocks that comprise the mountains on the east, south, and west of TEAD-N.

Groundwater flow at TEAD-N is part of a larger regional system that includes Rush and Tooele Valleys. Within this regional groundwater flow system water migrates from areas of recharge to areas of discharge. The recharge areas generally lie along the edges of valleys and receive recharge from mountain streams and snowmelt. Discharge occurs in one of two ways, either by interconnections from adjoining flow systems or through evapotranspiration and surface water bodies. Groundwater in Tooele Valley is found in the alluvial valley fill deposits and to a lesser extent in the underlying bedrock.

Groundwater within TEAD-N occurs under confined, unconfined, perched, and mounded conditions. The potable water at TEAD-N is derived from the bedrock and alluvium aquifers. Groundwater flowing through the bedrock does so through fractured sandstone, quartzite, limestone, and dolomite. The alluvial groundwater flows through saturated fan deposits. These two groundwater sources consist of a single interconnected aquifer system. The general groundwater flow direction at TEAD-N is from southeast to northwest, with groundwater flowing from the east and south toward the center of the valley and finally north toward the Great Salt Lake. The flow direction is altered to some extent in the Industrial Waste Lagoon (IWL) area which is located outside of the BRAC parcel, where the alluvial aquifer encounters a fault-block bedrock ridge. The IWL has been designated as SWMU 2. A groundwater contour map for TEAD-N is shown in Figure 2-3.

The IWL, SWMU 2, has been the primary source of the groundwater contamination under the BRAC parcel. The IWL, remediated in 1989, consisted of an unlined evaporation lagoon and four unlined conveyance ditches that tied to a main ditch. The lagoon itself is located outside of the BRAC parcel; however, conveyance ditches associated with the lagoon are located within the BRAC parcel. Wastewater from metal cleaning and stripping, sandblasting, steam cleaning, and other maintenance area operations was routed to the lagoon located northwest of the BRAC parcel via the series of unlined ditches located in the western portion of the BRAC parcel. Specifically, the four unlined conveyance ditches associated with the IWL were located adjacent to Avenues B, C, D, and E. Numerous contaminants including TCE, 1,1,1- trichloroethane, carbon tetrachloride, benzene, 1,1-dichloroethane, 1,1-dichloroethene, and chloroform have been detected in soil, sludge, and groundwater samples collected from the vicinity of the IWL and the associated conveyance ditches. These contaminants are presumed to have originated in the wastewater stream from the Maintenance and Supply Area. TCE is the most predominant contaminant, and is present in a groundwater plume located in part beneath the BRAC parcel. The TCE plume covers approximately 1,700 acres and extends slightly beyond the northern installation boundary. Three municipal water wells for the town of Grantsville are located downgradient of the present plume location. A pump and treat system is currently in operation to remediate the groundwater contamination and prevent additional migration of the plume. Using 13 extraction wells and 13 injection wells, the facility is treating appoximately 5,000 gallons of groundwater per minute. The total amount of groundwater to be treated is 36 billion gallons (REI, 1994b).

The Old Industrial Waste Lagoon (OIWL), SWMU 30, is an ancillary source of groundwater contamination within the BRAC parcel. The OIWL consists of a gravel pit and a series of pre- 1965 ditches, lagoons, and spreading areas that were identified on aerial photographs. Many

AEC_TEP\D01\FINALENP\FNLTEXT.ENP F,NAL

Rev. 09/09/94; 10:33am 22

ÊSSSi

4298 \ (4296)

■^ V/

Tooele Army Depot - North Area

4302 (4302) 4313

'(4312)

v~ 4304

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LEGEND

* Existing Groundwater

Municipal Water Sup:

JU. TEAD-N Water SuppJ (Groundwater elevatic

4298 Groundwater Elevatio

(feet above MSL)

(4296) Groundwater Elevatic

(feet above MSL)

^nmBB Interpretive Groundwr

4300 Groundwater Elevatic

" " (feet above MSL) Dc Inferred

——— BRAC Border

Installation Boundar

Estimated extent of Supply Area trichlorc defined by 5 ug/L c delineated from the conducted during Nc

interpreted estimatec Maintenance and Su: described above, ba; November, 1992bdat

Estimated extent of trichloroethylene plur 5 ug/L contour line the results of samp during November, IE-

Coalescing trichloroe1

boundaries

25-foot MSL -

>

SOURCE: a JMM, 1992 (modifi b USCOE, 1993 (mo; c REI, 1994b (modif'

Prepared for:

J.S. Army Environmental Cent

Dote Revised: 09/09/94 :\AEC_IEP\D01\FINAL.ENP\CADGIS\EF2

Igure 2-3

Groundwater Contour Map

Prepared by: AGEISS Environmental, inc.

4313 (4311)

'•'4533

5) . 447«9 4481 (4478) 4480

^479 (4479) (4502; 4478)

3RAC Darce\

LEGEND

* Existing Groundwater Monitoring Weiis

Municipal Water Supply Weils

*. TEAD-N Water Supply Wells (Groundwater elevation unavailable)

4298 Groundwater Elevation June '992°

(feet above MSL)

(4296) Groundwater Elevation January 1993°

(feet above MSL)

^B« Interpretive Groundwater Flow Direction

4300 Groundwater Elevation Contour

' (feet above MSL) Dashed Where Inferred

—— BRAC Border

Installation Boundary

Estimoted extent of Maintenance and Supply Area trichloroethylene olume, as defined by 5 ug/L contour line delineated from the results of sampling conducted during November, 1992.D

Interpreted estimated extent of Maintenance and Supply Arec plume described above, Dased on available November, 1992Ddata.

£■■<■•-

Estimated extent of Sanitary Landfill trichloroethylene plume, as defined by 5 ug/L contour line delineated from the results of sampling conducted during November, 1993.

Coalescing trichloroethylene oiume boundaries

25-foot Contour Interval MSL - Mean Sea Level

s SCALE

FEET

5000

SOURCE: a JMM, 1992 (modified) b USCOE, 1993 (modified) c REI, 1994b (modified)

Prepared for:


Date Revised: 09/09/94

l:\AEC_TEP\D01\FINAL.ENP\CADGIS\EF2-3.DWG

Figure 2-3

Groundwater Contour Map

Preparea by: AGE1SS Environmental, inc. FINAL

of these features are located in the western portion of the Maintenance and Supply Area within the BRAC parcel. Before construction of the IWL (SWMU 2) in 1965, industrial effluent from maintenance operations were discharged to a widespread area referred to as the OIWL. The OIWL was operated for approximately 20 years at an estimated discharge rate of 125,000 gpd of effluent (Weston, 1990). Portions of the OIWL were remediated as part of a RCRA corrective action of the IWL (SWMU 2), since many of the OIWL ditches and lagoons intermingle with ditches from the IWL. On the basis of the Phase II RFI sampling, it appears that widespread metals contamination is present in surface soils wherever industrial wastewater discharge occurred. Contamination, primarily heavy metals, has been documented in all of the ditches and lagoons sampled (REI, 1994b).

Since the same type of waste was discharged to OIWL ditches and collection ponds/lagoons as those defined in the IWL, and contamination has been documented in the trenches and lagoons associated with the OIWL, it has been concluded that the OIWL has also been a source of contamination associated with the plume shown in Figure 2-3. As described earlier, a groundwater pump and treat system is currently in operation to remediate the TCE groundwater plume associated with the IWL. The current groundwater monitoring network and the present groundwater pumping and treatment facility are thought to be sufficient to characterize and remediate contamination related to the OIWL. Particular emphasis, however, should be placed on evaluating the effect of metals contamination since the current treatment system is designed to treat volatile organic compound (VOC)-contaminated groundwater (REI, 1994b).

The Sanitary Landfill, SWMUs 12 and 15, is a secondary source of groundwater contamination in the BRAC parcel. The Sanitary Landfill is located in an arroyo just outside of the southern boundary of the Maintenance and Supply Area portion of the BRAC parcel. The SWMU is approximately 100 acres in size and has been in operation since 1942, and will continue to be used for disposal of large bulky items such as construction debris until November 1995. Previously, the landfill received both hazardous and nonhazardous wastes during its operation. Past waste management practices consisted of burying the wastes in trenches. Numerous contaminants including TCE, 1,2-dichloroethylene, benzene, cyclonite, silver, and hydrocarbons have been detected in downgradient groundwater wells. High concentrations of TCE have been detected in monitoring wells within the southernmost part of the BRAC parcel at the northernmost extent of the plume originating from the Sanitary Landfill. The estimated extent of the Sanitary Landfill plume is shown in Figure 2-3, based on groundwater sampling conducted in November 1993. (REI, 1994b).

The depth to potable groundwater under TEAD-N ranges from 200 to greater than 700 feet. Water supply wells at TEAD-N (Figure 2-3) are used intermittently for industrial use and irrigation of landscaped areas at TEAD-N. Groundwater from the supply wells is treated to meet regulatory maximum contaminant levels to allow for water consumption. Several supply- wells are located off-site which are used for irrigation and livestock watering primarily during the summer months. The town of Grantsville obtains drinking water from three community wells which are located downgradient of TEAD-N. The city of Tooele obtains drinking water from supply wells located cross-gradient of TEAD-N, from an upgradient well, and from a surface water source (reservoir) (REI, 1994a).

The quality of groundwater within Tooele Valley is generally acceptable for culinary and agricultural purposes. The concentrations of dissolved solids is reported to range from 283 to 2,180 milligrams per liter (mg/L), with most of the water containing less than 1,000 mg/L.


In summary, groundwater contamination of the alluvial and bedrock aquifers has occurred as a result of operation of the SWMU 2 and SWMU 30 industrial waste lagoons and unlined ditches, as well as from waste disposal operations at the Sanitary Landfill (SWMUs 12 and 15). The resulting groundwater plumes are situated in the northeastern portion of TEAD-N and subsequently under lie the subject BRAC parcel. Groundwater in these plumes is contaminated with a variety of VOCs, the most widespread of which is TCE.

2.4.7 Flora and Fauna

Climate has had a profound influence on the flora of Tooeie Valley. The lack of precipitation, Sow humidity, high summer temperatures, and light winds have forced plants to adapt to a very high-rate of evapotranspiration. Soils are a significant determinant of flora in the area. Many plants have adapted to the soil conditions, including alkaline pH, saline content, low soil moisture content, lack of humus, high mineral ion content, and varying soil depths and types; but these factors also tend to limit the number of plants.

TEAD-N is in the area classified as an Artemisia Biome, which is characterized by sagebrush (Artemisia) and saltbrush, and can be divided into numerous range site types. Vegetation mapping indicates that three range site types comprise the BRAC parcel (REI, 1994a). The BRAC property that is located in the maintenance and supply area has been characterized as Upland Stoney Loam (Pinon-Utah Juniper), which contains bluebunch wheatgrass, cheatgrass, mountain big sagebrush, Utah juniper, and yellowbrush. Important plant species include black sagebrush, bluegrass, and antelope bitterbrush. The BRAC property that is located in the Administrative Area has been characterized as Upland Loam (Mountain Big Sagebrush) and Upland Gravelly Loam (Mountain Big Sagebrush), which contains mountain big sagebrush, rabbitbrush, bluebunch wheatgrass, antelope bitterbrush, and some Utah juniper. Important plant species are Indian ricegrass and bluegrass.

The condensed growth and reproduction periods of the plant communities in Tooeie Valley limit the ecological niches available to animal species. Not only is competition for food sources severe during the hot, dry summer and winter dormancy periods, but the animals must adapt to the same climatic conditions. They have adapted as hibemators, estivators, diurnals, or nocturnals, or have physiological adaptations that enable them to survive drought and heat, or cold and snow.

Approximately 127 wildlife species have been identified in the vicinity of TEAD-N, including 58 species of mammals and 63 species of birds. Six reptiles were also identified. No fish or amphibians were identified (REI, 1994a). Several species of game animals exist in the vicinity of TEAD-N. Mule deer, mountain cottontail, and desert cottontail inhabit the area. Fur- bearing animals include coyote and bobcat. Game birds include sage grouse, Gambil's quail, short-tailed grouse, blue grouse, ruffed grouse, and the imported ring-necked pheasant and chukar. In addition to the local game birds, there are 37 species of migratory waterfowl that use the flyways through TEAD. Several species have been eliminated from the areas, including bison, grizzly bear, elk, black bear, pronghorn antelope, and mountain sheep. The mountain sheep, pronghorn antelope, and elk have been or are being reintroduced, mainly in the mountains (EAESTI, 1988).

There are 15 endangered, candidate, or sensitive wildlife species either known to occur or that potentially occur on TEAD-N. Eleven of these are protected by the Endangered Species Act of 1973, Section 668-668d (REI, 1994a). Nine endangered, candidate, or sensitive bird


species have been either identified in the region or observed on the TEAD-N facility. Of these species, the bald eagle and the peregrine falcon are Federal endangered species; all of the others are Federal candidate species (Category II). The golden eagle, which is protected under the Eagle Protection Act, has also been observed at TEAD-N. These protected species include the following:

♦ Bald eagle ♦ American peregrine falcon ♦ Western snowy plover ♦ White-faced ibis ♦ Swainson's hawk ♦ Western yellow-billed cuckoo ♦ Mountain plover ♦ Golden eagle

Additionally, two Federal candidate mammalian species, the Skull Valley pocket gopher and the spotted bat, may also occur on the site. Four Utah sensitive species occur on the site either as permanent or seasonal residents, or they may potentially occur on the site. These species include mule deer, pronghorn antelope, sage grouse, and chukar.

2.4.8 Archeological Resources

Tooele Valley has supported four separate Indian cultures. The Early Desert Archaic culture inhabited the area some 11,000 years ago, followed by the Late Desert Archaic, Freemont, and Numic-speaking cultures.

The Freemont culture (circa 700 A.D. to 1400 A.D.) was the most important in the area from an archaeological perspective. The Freemonts were horticulturally oriented, augmenting their diet with hunting. Freemont hunting and recreational sites are located in the Sandy Hills Area. Pottery and bows and arrows were used by the Freemonts and some artifacts have been found in this area. The Freemonts set up a community on South Willow Creek with over 100 pit dwellings along the banks on land either owned or controlled in part by TEAD. Eight of the dwellings are within TEAD's perimeter fence and are relatively undisturbed. None of the dwellings inside the installation are located within the BRAC parcel, however. The dwellings off TEAD have been severely damaged by archaeological excavation in the past. An 80-acre reservoir is planned by the Utah Department of Natural Resources for South Willow Creek abutting TEAD. The planned reservoir would inundate the majority of the Freemont sites off TEAD(EAESTI, 1988).

The Numic-speaking culture (Shoshones) was the last Indian culture in the vicinity. This tribe appeared 100 through 200 years before the Freemont culture disappeared. The Numic- speaking culture, which was a more nomadic hunting culture than the Freemont peoples, adapted to the increased aridity and still live nearby on the Goshute Reservation and the Skull Valley Indian Reservation (EAESTI, 1988).

A 4-foot high by 5-feet in diameter rock was found in the northeast portion of TEAD-N, outside the BRAC parcel, covered by petroglyphs in a deteriorated state. Although the petroglyph was found in an area of rock outcropping, no other petroglyphs have been found. In 1992, a cover was constructed over the rock to protect it from further deterioration. The petroglyph has been nominated for inclusion in the National Historical Register (EAESTI, 1988).


Additional traces of prehistoric habitation have recently been uncovered near the western boundary of TEAD-N, within the limits of the installation. The extent and importance of this site have not yet been determined (EAESTi, 1988).

2.5 PREVIOUS ENVIRONMENTAL STUDIES AT TEAD-N

A variety of environmental investigations have been conducted at TEAD-N from 1979 to the present (Table 2-2). In 1987, a Draft Interim RCRA Facility Assessment for TEAD-N (NUS, 1987) identified 28 SWMUs. These SWMUs were suspected or known to have released contaminants into the environment. Subsequent investigations resulted in the identification of an additional 18 SWMUs, which resulted in a total of 46 hazardous waste sites at TEAD-N. Under the terms of Post-Closure Permit (PCP) #UT3213820894 (USDEQ, 1993) signed on January 7, 1991, the USDEQ-DSHW is requiring TEAD to conduct corrective action investigations at 46 SWMUs. For regulatory purposes, the 46 SWMUs were divided into three groups for environmental investigation and potential remediation. Two of the groups (SWMUs with known releases and suspected releases) are being administered under the requirements of RCRA, while the third group is being administered under CERCLA under a Federal Facility Agreement (FFA). However, it should be noted that as a result of the ENPA process, six additional SWMUs have been identified and will be addressed under the RCRA process.

2.5.1 CERCLA Status

On October 2, 1984, the EPA proposed TEAD-N for inclusion on the National Priorities List (NPL). The facility was listed on the NPL on October 1, 1990. As a result, the EPA, State of Utah, and TEAD entered into a FFA on September 16, 1991. In this agreement, 17 of the 46 SWMUs were redesignated as CERCLA sites contained within seven operable units (OUs). In 1991, work plans for a Remedial Investigation (RIVFeasibility Study for the 17 CERCLA sites were prepared, and field investigation activities were completed in the summer of 1992 on the basis of these plans. The Final Rl Reports documenting this work were submitted in July 1993 and February 1994. To complete the investigation, another round of field activities was conducted during the Spring/Summer of 1994 at some of the sites. An Rl report addendum will be produced at the end of the study. Six of the 17 CERCLA sites are located within the subject BRAC parcel. As per recent conversations with AEC and AEC's comments on the Draft ENPA, the CERCLA sites are now being referred to as SWMUs. Thus, in this report all CERCLA sites are referred to as SWMUs.

2.5.2 RCRA Status

The remaining original 29 SWMUs are covered under a RCRA PCP, which was issued to TEAD by the State of Utah on January 7, 1991. Under the PCP, the SWMUs were divided into nine known-release SWMUs and 20 suspected-release SWMUs.

In 1991, TEAD received a Utah Hazardous Waste PCP for the IWL (SWMU 2). As part of this PCP, a RFI Phase I Summary Report was required which identified all SWMUs where known releases of hazardous wastes have occurred at TEAD-N. A RCRA Phase I Summary Report for Known-Release Units was submitted to the State of Utah in November 1991 and approved in March 1992. In accordance with the permit, work plans for a Phase II RFI were submitted to the State in June 1992 and approved in April 1993.

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For the 20 suspected-release SWMUs, a Final Phase I RFI was completed in August 1993. The objective of the Phase I RFI was to determine the presence or absence of environmental contamination at each of the suspected-release SWMUs and to recommend either additional investigations or no further action. The Final Phase I RFI for the suspected-release SWMUs resulted in a no further action determination for four of the SWMUs and recommendations for further investigations (Phase II investigations) for 16 of the SWMUs.

The Final Draft RFI Report Phase II Study of Known-Release SWMUs was completed in August 1994. The objective of the Phase II RFI was to fill data gaps from Phase I investigations for two SWMUs and to conduct two rounds of sampling to characterize potential contamination associated with seven others. The Final Phase II RFI for the nine known- release SWMUs resulted in a recommendation for no further RFI/CMS activities for three of the SWMUs and recommendations for a Corrective Measures Study (CMS) at the other six. Ninety days after final approval of this report, a CMS is due.

This process will result in a CMS Report and a Statement of Basis document, which will summarize the information from the RFI and CMS reports to facilitate public participation in the remedy-selection process. Three known-release SWMUs and 11 suspected-release SWMUs are located partially or completely within the subject BRAC parcel.

It should be noted that as a result of the ENPA process, six additional SWMUs (SWMUs 50- 55) have been identified and are scheduled for investigation under the ongoing RFI (Oliver, 1994).


3.0 AREAS REQUIRING ENVIRONMENTAL EVALUATION

In this section of the report, AREEs that were identified within the TEAD-N BRAG parcel are discussed. Many of the AREEs were documented in information previously gathered during various investigations and reports, most importantly the Final Phase I RCRA Facility Investigation Report (MW, 1993). Final Draft RCRA Facilities Investigation Report Phase II Study of Known-Release SWMUs (REI, 1994b), and the Final Remedial Investigation Report for Operable Units 4-10 (REI, 1994a). Additional AREEs were identified based upon evaluation of other existing installation documentation, visual inspection, and employee interviews during the site visits conducted on October 12 through 15 and October 25 through 28, 1993; and August 23, 1994. Table 3-1 provides a summary of all AREEs by number. The locations of the majority of AREEs are shown in Figures 3-1 and 3-2; however, AREEs that are installation-wide or cover a large areal extent are discussed in detail in the text but are not displayed on the maps. Appendix C contains photographs of most of the AREEs. Impacts of the AREEs on environmental media, including groundwater, surface water, soil, and air, are discussed in Section 4.0.

Some areas or facilities within the BRAC parcel that have been of concern in past environmental investigations may not be considered an AREE under this investigation, generally because they have been remediated or have not been considered for further action under the RFI. These areas are discussed in Section 3.20.

3.1 SWMU 49: OLD WASTEWATER DISTRIBUTION SYSTEM/RADIATOR REPAIR FACILITY (AREE 1)

3.1.1 Description

This AREE, the Old Wastewater Distribution System, is comprised of the following three components: 1 a) Current Stormwater Sewer System (Former Industrial Wastewater Pipelines); 1b) Old Connections to the New Industrial Wastewater System; and 1c) the Radiator Repair Facility. This AREE has not been previously identified as a concern during other environmental investigations; however, the State of Utah has recently identified this AREE as SWMU 49 which is subject to the conditions for corrective action in the RCRA PCP (Anderson, 1993).

3.1.1.1 Current Stormwater Sewer System (Former Industrial Wastewater Pipelines) (1 a)

AREE 1a is defined as the current stormwater sewer system, which was formerly used as the industrial wastewater system, as explained below. The BRAC parcel is underlain by a series of manholes, pipes, drain systems, and culverts that function as the stormwater drainage system for the entire Maintenance and Supply Area. The underground system is fed from surficial stormwater flow. The topography within the BRAC parcel is such that during a storm event surficial flow of stormwater is to the north. The surface water enters the underground piping system through drains that are located throughout the Maintenance and Supply Area. Flow is discharged from the system through a series of culverts along the eastern side of the OSLs that are located west of the maintenance buildings. Discharged water drains onto the surface and dissipates through evaporation and infiltration. The current stormwater sewer system is shown on Figure 3-1.

Prior to the construction of the IWTP and the installation of the industrial wastewater pipeline, both stormwater and industrial wastewater were delivered simultaneously through the piping that now carries stormwater only. A system of drains and pipes originating at the effluent

AEC_TEP\D01\FINAL.ENP\FNLTEXT.ENP FINAL Rev. 09/25/94; 6:01pm 33

Table 3-1. Areas Requiring Environmental Evaluation. Page 1 of 1.

AREE Number Description Building Numbers/Locations

1

(a)

(b)

(o)

SWMU 49: Old Wastewater Distribution System/Radiator Repair Facility

Current Stormwater Sewer System

Old Connections to the New Wastewater System

Radiator Repair Facility

Located above and below ground throughout the Maintenance and Supply Area

Buildings 600, 601, 602, 606, 609, 610, 611, 612, 615, 620, and 637

Building 609

2 SWMU 47: Boiler Plant Blowdown Water

Buildings 606, 610, 637, and 691

3 SWMU 50: Compressor Condensate Drain

Building 619

4 SWMU 51: Chromic Acid/ Alodine Drying Beds

Four Concrete Pads Marked "623"

5 SWMUs 31, 32, and 53: PCB-Related Areas

SWMU 31 - Former Transformer Boxing Site (OSL 680) SWMU 32 - PCB Spill Site (OSL 665D) SWMU 53 - Soils at Buildings 659 and 679

6 SWMUs 4 and 54: Sand Blast Areas

SWMU 4 - Buildings 600, 615, and 617 (current operations) SWMU 54 - Buildings 603, 604, 612, 613, 637, and 647 (past operations)

7 SWMU 46: Waste Oil Dumpsters/Storage Tanks

Buildings 600, 602, 607, 611, 619, 620, 637, and 691

8 SWMU 26: DRMO Area Includes various structures and OSLs within the DRMO

9 SWMU 38: Industrial Wastewater Treatment Plant

Includes the area west of Building 713

10 Asbestos Facility-wide

11 PCB-Containing Transformers Facility-wide

12 Underground Storage Tanks Facility-wide

13 Above Ground Storage Tanks Facility-wide

14 SWMU 52: Drain Field and Disposal Trenches

Disposal trenches located at the southwest comer of the Administration Area BRAC parcel; drain field located at the northwest comer of the Administration Area BRAC parcel

15 SWMU 55: Battery Shop Building 618

16 SWMU 28: 90-Day Drum Storage Area

Buildings 588, 596, and 656

17 SWMU 29: Drum Storage Areas

Buildings 576 and 589

18 SWMUs 2 and 30: Conveyance Ditches and Lagoons

Includes various OSLs west of the Maintenance and Supply Area; the ditches and lagoons are not visible from the surface, but have been identified through historical aerial photographs

19 Lead-Based Paint Buildings in the Administration Area, specifically Buildings S-101, S-103, S-104, S-110, S-111, S-113, S-115, S-117, S-118, S-119, S-120, S-121, S-122, S-123, S-124, S-125, S-126, S-141, S-143, S-145, S-147, S-149, S-150, S-151, S-152, S-153, S-155, 1000, 1001, 1002, 1004, 1005, 1010, and Tooele Valley High School

AREE Area Requiring Environmental Evaluation DRMO Defense Reutilization and Marketing Office OSL Open Storage Lot PCB Polychlorinated biphenyl SWMU Solid Waste Management Unit

AEC_TEP\D01\FINAL.ENP\TAB31.ENP Rev. 09/25/94; 6:40pm

FINAL

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producing operations delivered the effluent from the maintenance buildings to the stormwater sewer system (Advanced Sciences Inc., 1991). Up to 125,000 gallons of contaminated water flowed through these pipes each day. Some of the effluent was highly contaminated with chemicals such as acids, caustics, solvents, detergents, oils, grease, and heavy metals from industrial operations including vapor degreasing, metal cleaning, stripping, anodizing, electroplating, spray painting, sand blasting, and other various processes.

Prior to 1965, effluent was discharged through the pipelines into six unlined ditches on the east side of the OSLs along Avenues F, G, H, J, K, and L. The ditches drained toward the OIWL, which has been designated as SWMU 30, and five other locations. The OIWL, with the exception of associated conveyance ditches and three lagoons, is located outside of the BRAG parcel. Between 1965 and 1988, industrial wastewater and stormwater was delivered from the Maintenance and Supply Area buildings through this system to the IWL, designated as SWMU 2, which is located outside of the BRAG parcel. The IWL consisted of an unlined evaporation lagoon and four unlined conveyance ditches that tied into a main ditch, which extended approximately 1.5 miles from the outfalls near the Maintenance and Supply Area to the IWL. The four unlined ditches were located within the BRAC parcel along Avenues B, C, D, and E. The IWL and associated ditches were remediated in 1989. The CMF was constructed over what was formerly Avenues D and E. The conveyance ditches and lagoons that are within the BRAC parcel and are associated with SWMUs 2 and 30 are discussed in detail as AREE 18 in Section 3.18.

In the late-1980s, the IWTP was built and industrial wastewater disposal was transferred to the new system. The old drains were plugged so that effluent was delivered directly to the IWTP and no longer combined with stormwater. As such, stormwater currently drains from five outfalls located along Avenues F, G, H, J, and K (Figure 3-1). Currently, only stormwater is permitted to be drained through the old pipelines.

3.1.1.2 Old Connections to the New Wastewater System (1b)

AREE 1 b is defined as the sections of the old wastewater distribution system that are now used as part of the new wastewater system, as explained below. During 1985 and 1986, a new wastewater treatment piping system was installed that collects effluent from waste- producing operations in the Maintenance and Supply Area and delivers it to the IWTP. New doubie-walled high-density polyethylene pipe was installed from the effluent-producing facilities in the Maintenance and Supply Area to the IWTP. The old system piping was detached from the stormwater sewer system and used to connect effluent-producing buildings into the new main wastewater line. The connecting lines, which are constructed of vintage single-walled cast-iron, steel, or concrete, were tied into the new system at various points along the main. Some connecting pipe lengths are reportedly in poor condition from years of wastewater transport. Buildings 600, 601, 602, 606, 609, 610, 611, 612, 620, and 637 have connecting pipe lengths of less than 10 feet. Building 615, on the contrary, has over 100 feet of old pipe remaining that is attached to the new wastewater main line (Kinsinger, 1993).

3.1.1.3 Radiator Repair Facility (1c)

AREE 1c, the Radiator Repair Facility is a structure within TEAD-N where military vehicle radiators are cleaned, repaired, and refurbished prior to being reinstalled in the overhauled vehicles (Figure 3-1). The structure also has three wash bays where vehicles are steam cleaned prior to repair, and a chemical line where vehicle parts are dipped into a series of


three tanks that are filled with sodium hydroxide for parts degreasing and corrosion removal. Containers such as 55-gallon drums are also triple rinsed in the steam cleaning area and stored outside. The radiator repair section has a series of buffers, grinders, solder equipment, and other associated equipment used for radiator repair. The building is equipped with a lead collection system for lead dust collection. The dust is delivered under vacuum to a cyclone separator outside of the structure where the dust falls out into a collection barrel. The barrels are sealed when full and delivered to the 90-Day Drum Storage Area to the south of the Maintenance and Supply Area. Building 609 has been condemned, and operations are soon to be moved to Building 615. All effluent from the structure is designed to drain into the IWTP system through a series of sumps and catch basins within and around the structure. The Radiator Repair Facility has recently been included with the old wastewater distribution system as part of SWMU 49. As such, this facility is subject to the conditions for corrective action in the RCRA POP (McFartand, 1994b).

3.1.2 Known and Suspected Releases

There has been sampling of drainage ditches associated with AREEs 1a and 1b either as part of the SWMU 2 groundwater assessment work or the Phase II RFI for known-release SWMUs. Subsurface soil, sludge, and groundwater samples have been shown to contain numerous contaminants thought to have originated in the wastewater stream that discharged to the IWL (SEC Donahue, 1993). Based on these analytical results and contamination identified at the IWL under the RFI, the outfall area along the OSLs is suspect, as the same system delivered relatively the same type of effluent to both areas. Since the same underground system now delivers stormwater to outfalls along the OSLs at Avenues F, G, H, J, and K, it is suspected that residual contamination from years of wastewater transport has potentially contaminated the soils at the outfalls.

No evidence was found of known releases or spills from the stormwater drainage system. However, it is known that the pipelines are reportedly in poor condition from years of wastewater transport. Based on the fact that groundwater is contaminated below the industrial area and upgradient from the system outfalls, pipe leakage is of potential concern. There is a possibility when the system was in use for wastewater transport that industrial wastewater was released from potentially damaged portions of the pipelines. Likewise, the connecting pipes that comprise AREE 1b are old, and in some cases, such as those that connect Building 637 to the main line, show visible signs of etching from years of wastewater transport. There is, however, no documented release of contaminants from the connecting pipe sections.

Although no known releases have been documented related to either AREE 1a or 1b, samples collected from the wastewater stream in 1982 contained several VOCs and phenolic compounds. Subsurface soil, sludge, and groundwater samples have been shown to contain numerous contaminants thought to have originated in the wastewater stream (SEC Donahue, 1993).

AREE 1c, the Radiator Repair Facility, has no known releases associated with the structure. However, visual observations conducted during the EN PA site inspection of the building and its operations indicate that contaminant releases to the environment are likely due to the nature of operations at this building. For example, overspray from steam cleaning operations, radiator repair operations, caustic dip tank usage, etc., could potentially effect the environment. Also, Building 609 effluent is currently transported to the IWTP via the new wastewater transport system. As described in AREE 1 b however, the old system piping from


Rev. 09/09/94; 3:10pm 38

this building was used to attach it to the current wastewater system and is suspect as indicated in the AREE 1b discussions.

3.1.3 Conclusions

From information gathered concerning the current stormwater sewer system, AREE 1a, it can be concluded that environmental contamination resulting from this system is likely. Based on the fact that groundwater is contaminated below the industrial area and upgradient from the system outfalls, pipe leakage is of potential concern. There is a possibility when the system was in use for wastewater transport that industrial wastewater was released from potentially damaged portions of the pipelines. Historically, highly contaminated effluent flowed through the pipes and drained toward the IWL, as well as, into the OSL area west of the maintenance buildings.

Additionally, the pipes associated with AREE 1b are old and constructed of single-walled concrete and steel. Therefore, it is also possible that environmental contamination has resulted from leakage associated with deteriorating or damaged portions of the system. Since sections of these old pipes are now in use as part of the new industrial wastewater system, this concern applies to the active system as well.

Finally, it can be concluded that operations within Building 609 (AREE 1c) are a potential source of contamination to the environment. Steam cleaning, caustic dip tanks, and general radiator repair are all sources of potential environmental contamination. All of these operations are somewhat contained within the structure through the use of pollution controls such as ventilation systems and drainage to the IWTP; however, visual observations and the inherent nature of operations within this structure indicate that the potential for contaminant releases exists.

3.1.4 Recommendations

A site investigation is recommended to determine the environmental impacts of all three portions of this AREE. Some parts of this system have been investigated as part of the Phase II RFI for known-release SWMUs. The stormwater drainage system should be investigated to determine if historical use of the system for wastewater transport has resulted in releases to the environment. Also, the radiator repair system should be investigated to determine if the operations within this structure have caused environmental contamination. Groundwater monitoring need not be implemented for this AREE, because groundwater contamination has already been characterized extensively in the area of the BRAC parcel, a groundwater monitoring program is already in place, and a large scale treatment system for VOCs is operational. However, the following specific recommendations are made for AREE 1:

1. Sample surface and subsurface soil at the outfalls along Avenues F, G, H, J, and K to assess the impact of current and historical discharges through the underground piping. Analyses should include VOCs, semivolatile organic compounds (SVOCs) excluding PCBs and pesticides, and metals.

2. Sample discharge water to determine the nature of any potential residual contamination remaining in the system. Analyses should include VOCs, SVOCs, and metals.


3. Inspect the integrity of the piping to determine if there are areas of severe damage. If such areas are detected, then subsurface soil sampling should be done along side and below the pipes in the areas of noted damage.

4. Conduct a limited site investigation of the Radiator Repair Facility (Building 609) to determine if operations within the structure such as radiator repair, steam cleaning, and caustic dip tank usage have released contamination to the surrounding area. Sampling of surface and subsurface soils at select locations surrounding the facility is recommended. Analyses should include VOCs, SVOCs, and metals.

5. Since the Radiator Repair Facility is scheduled for demolition in Fiscal Year 1997, the structural debris would need to be sampled for TCLP to determine the proper disposal method. Treatment of the debris according to the RCRA land disposal regulations may be required.

3.2 SWMU 47: BOILER PLANT SLOWDOWN WATER (AREE 2)

3.2.1 Description

AREE 2, Boiler Plant Slowdown Water (SWMU 47), consists of four locations within the Maintenance and Supply Area, and includes Buildings 606, 610, 637, and 691 (Figure 3-1). Each of these buildings contains a boiler that generates steam. During boiler plant maintenance, the boiler is back-flushed during a blowdown which produces small concentrations of blowdown water. Tannic acid, an organic compound, is used to reduce scale buildup inside the boiler during this process and gives the blowdown water a reddish color. These boilers and the associated blowdown systems have been in operation since the initial construction of the buildings, most of which were built during the 1940s. The boiler blowdown water was previously discharged from the boilers inside the buildings onto the ground. All boiler effluent from Buildings 606, 610, and 637 is now discharged to a drain system leading to the SWTP (MW, 1993).

At Building 691, effluent from multiple sources including the building boiler, paint booth area, and interior and exterior drains is discharged through an oil/water separator and into a culvert to a point approximately 1,000 to 1,200 feet west of the building. From there it flows along a small open ditch westward, most likely infiltrating into the soil. The boiler within this structure produces steam that is used only by this structure. The building was not incorporated into the IWTP system, because it was not economically feasible to install a main line to this portion of the Maintenance and Supply Area for this structure alone (Sullivan, 1993).


During the Phase I RFl, one water sample was collected from the boiler blowdown sump outside of Building 610. Analysis revealed the presence of arsenic, copper, iron, lead, manganese, and zinc; however, none of the detections were above proposed health-based action levels or promulgated drinking water standards. Concentrations of the VOCs acetone and methylene chloride and three phenol compounds were also detected in this water sample. Of these organic compounds, only methylene chloride exceeded the proposed regulatory action level.

AEC_TEP\D01\FINALENP\FNLTEXT.ENP ™AL Rev. 09/09/94; 10:33am 40

The remainder of the samples taken during the Phase I RFI (one surface water and three soil/sediment samples) were obtained from soil nearby the blowdown water runoff area at Building 610. Elevated levels of several metals were found, although none exceeded any established health-based action criteria. Total Residual Petroleum Hydrocarbons (TRPH) were found in all of the soil/sediment samples collected at SWMU 47 (MW, 1993).

3.2.3 Conclusions

Based on data collected during the Phase I RFI, there is evidence that boiler blowdown activities have released metals and petroleum compounds to the environment through contamination of soils. Boilers located at Buildings 606, 610, and 637 are now connected to the IWTP and as such are not currently contaminating the environment with boiler blowdown water. Building 691, however, is currently not attached to the IWTP and as such drains boiler blowdown through an oil/water separator and into a nearby drainage ditch.


Based on contamination detected during the Phase I RFI, it is recommended that further evaluation of environmental contamination from past effluent discharging activities within SWMU 47 be evaluated as is currently being accomplished under the Phase II RFI. In addition, Building 691 needs further investigation to determine if effluent draining from the building into a nearby ditch is contaminating the environment. Soil samples should be collected from the drainage ditch and analyzed for VOCs, SVOCs, and metals. If Building 691 effluent is determined to be contaminating nearby soil, then appropriate steps need to be taken to alleviate the problem (MW, 1993).

3.3 SWMU 50: COMPRESSOR CONDENSATE DRAIN (AREE 3)

3.3.1 Description

The compressor condensate drain in Building 619 (Figure 3-1) has not been previously investigated. The drain was discovered during interviews with TEAD-N personnel during the ENPA site visit October 25 through 28, 1993. Little specific information is known about the drain at this time except that compressor condensate in Building 619 is dissipated through a perforated subsurface drain. Visual inspection of the compressor room at Building 619 revealed a drain pipe that originated at the compressor room and led to a 55-gallon drum that appeared to be buried to the halfway point. The pipe entered the drum from the top and drained into it. The drum was buried in a gravel sump that appeared oil stained. The buried portion of the drum was reportedly perforated to dissipate the effluent.


There has been no investigation of the compressor condensate drain at Building 619. As such, there are not known confirmed contaminant releases. However, according to installation personnel, it is not uncommon for lubricating oils to be present in the condensate (Kinsinger, 1993). Visual inspection of the drain at Building 619 revealed oil staining around the drainage area and indicated that releases associated with the use of this drain is likely.


3.3.3 Conclusions

The potential exists that surface and subsurface soil could be contaminated from the compressor effluent that potentially contains lubricating oil from the compressor equipment. Information concerning this is incomplete, and visual inspection revealed only one suspect drainage system.


A site investigation is recommended. Since the October 1993 ENPA site visits, the compressor condensate drain at Building 619 has been designated SWMU 50 and will be investigated under the ongoing RFI. It is recommended that samples of the effluent and the surrounding surface and subsurface soil be obtained and analyzed for VOCs and SVOCs.

3.4 SWMU 51: CHROMIC ACID/ALODINE DRYING BEDS (AREE 4)

3.4.1 Description

A group of four concrete pads marked by a placard with the number 623 are located slightly southeast of the CMF (Figure 3-1). The pads are configured in a square pattern with two of them elevated approximately 4 feet above the others. The two elevated pads have a trench cut into the center of them that appears to have been used to drain liquid from the pads. The two lower pads are bemned so that liquid could be contained. The ground between the upper and lower pads is steeply sloped. Interviews with several longtime TEAD-N employees revealed little about past activities at the site. Some indicated that engines and radiators were flushed at this location. Subsequent to these interviews and discussions, real property historical records were reviewed and it was discovered that in the 1970s, these pads were used as drying beds for the disposal of chromic acid and alodine wastes generated in the Maintenance and Supply Area (Oliver, 1994).

3.4.2 Known or Suspected Releases

No known or suspected releases have been reported at this location.

3.4.3 Conclusions

Given the historical use and configuration of the drying beds, contamination of underlying soil is likely.


A site investigation is recommended. Since the October 1993 ENPA site visits, the chromic acid/alodine drying beds have been designated SWMU 51 and will be subject to investigation under the ongoing RFI. Collection of a limited number of surface and subsurface soil samples between the concrete pads is recommended to determine if past activities may have released contaminants to the environment. These samples should be analyzed for VOCs, SVOCs, and metals.

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3.5 SWMUS31.32, AND 53: PCB-RELATED AREAS (AREE 5)

3.5.1 Description

This AREE includes the following three PCB-related areas that are located within the BRAC parcel: the Former Transformer Boxing Area (SWMU 31); the PCB Spill Site (SWMU 32); and the soils outside Buildings 659 and 679 (SWMU 53). Two other PCB-related SWMUs that comprise OU5 include the Former Transformer Storage Area (SWMU 17) and PCB-Storage Building (SWMU 33). These two SWMUs are being considered for no further action under CERCLA, and as such, are not designated as AREEs. These two SWMUs are discussed briefly in Section 3.20 (non-AREEs).

The first area within OU4 is the Former Transformer Boxing Site (SWMU 31) located at OSL 680 (Figure 3-1). OSL 680 was used from 1979 to 1980 for the temporary storage of transformers that were once stored at OSL 675B. From OSL 675B, the transformers were sent for off-site disposal or they were transferred to Building 659.

The second area within OU4 is the PCB Spill Site (SWMU 32), which is located at the southern corner of OSL 665D (Figure 3-1). In October of 1980, a transformer oil spill occurred at the southwestern comer of the lot. Two transformers, reportedly containing a total of 1,000 gallons of PCB-contaminated oil were punctured with a fork-lift blade during transformer removal operations. The spill occurred on the unpaved ground surface, and the spill area was reportedly less than one-half acre. Cleanup involved excavating oil-saturated soils, containerizing the soils in 55-gallon drums, and properly disposing of these drums. Some of the oil leaking from the transformers was collected and was also placed in 55-gallon drums for disposal. Approximately 440 55-gallon drums of contaminated soil and 18 drums of contaminated oil were removed. The excavation area was backfilled with imported fill material. Lot 665D is currently used for vehicle-related equipment storage (REI, 1994a).

The third area includes potentially-contaminated soil located outside of Buildings 659 and 679 (SWMU 53) (USAEC, 1994). These areas comprise a newly designated area that has been declared a SWMU by the State of Utah. Concern has been expressed as to the adequacy of PCB spill clean-up at Building 679 and possible releases in the outdoor loading area of Building 659 (Oliver, 1994).


Previous investigations have indicated that no known or suspected releases of contaminants have occurred at the Former Transformer Boxing Area (SWMU 31). Existing analytical results from surface soil composite samples indicate that PCBs are present at the PCB Spill Site (SWMU 32) in trace amounts only. The PCB Spill Site has been remediated as discussed in Section 3.5.1, and a site investigation was conducted in 1988. Seventeen discrete surface soil samples were collected from an area measuring approximately 45 feet by 50 feet. These samples were composited into five samples. Aroclor 1260 was detected in all five samples, ranging from 0.0764 to 0.2140 micrograms per gram (u.g/g). These results are below EPA guidelines and the Toxic Substances Control Act (TSCA) cleanup standard for nonrestricted areas, however (REI, 1994a).

No information regarding known or suspected releases at the contaminated soils locations at Buildings 659 and 679 could be found during the ENPA investigation. According to Larry


Fisher, TEAD-N Environmental Engineer, no record was available at the TEAD-N Environmental Office concerning these sites.

3.5.3 Conclusions

Based on the results of a risk assessment conducted at OU4 during the Rl using available data, no significant threat to human health or the environment exists at the PCB Spill Site (SWMU 32); however, additional data must be collected for the risk evaluation required by the Rl. Additional data is also required under CERCLA for the Former Transformer Boxing Site (SWMU 31) and for the newly designated areas outside Buildings 659 and 679 (SWMU 53). Thus, these OU4 SWMUs are classified as an AREE, because they are being retained for further action under the CERCLA and RCRA programs.


Further sampling at SWMUs 31, 32, and 53 is recommended as per requirements of the CERCLA and RCRA programs only.

3.6 SWMUs 4 AND 54: SAND BLAST AREAS (AREE 6)

3.6.1 Description

There are three sand blast areas within the Maintenance and Supply Area of TEAD-N that are included in SWMU 4. They are located in Buildings 600, 615, and 617 (Figure 3-1). Sand blast media within these areas is reused until it loses its effectiveness. The spent media have the consistency of a fine dust and are collected for temporary storage in dumpsters prior to removal by a hazardous waste contractor for off-site disposal. There are three types of sand blast media used at TEAD-N, including steel grit, ground walnut shells, and glass beads. The used media are directed into sealed dumpsters that lie outside the buildings through exhaust ventilation systems and particle size separators. The dumpsters are placed on concrete slabs that are surrounded by asphalt parking lots and roadways, and there is little or no exposed soil in the immediate vicinity of these dumpsters.

Samples of sand blast media have been collected and analyzed by the TEAD Environmental Management Office. Sampling results indicated that the spent steel dust contained barium, cadmium, lead, and nickel, but no concentrations were above the threshold for characterizing a waste as hazardous according to the extraction procedure (EP) Toxicity analysis. The spent walnut dust also contained barium, cadmium, chromium, and lead. Total lead and chromium concentrations were 17,000 and 3,000 \igfg, respectively. EP Toxicity levels of chromium in the walnut dust exceeded the threshold for characterizing a waste as hazardous. No analytical results of the spent glass beads were available.

During the ENPÄ site visits October 12 through 15 and October 25 through 28, 1993, other areas were identified where sand blast operations occurred in the past. These included areas in Buildings 603, 604, 612, 613, 637, and 647. Most of these operations were of small scale and were localized. Information concerning containment practices was largely unavailable, because most of these areas have since been abandoned or have been converted to other uses.



During the Phase I RFI, two samples were taken from near each of the spent sand blast media collection points (six total) at Buildings 600, 615, and 617. Nearby surface soils and surface water runoff pathways were sampled and analyzed for VOCs, SVOCs, and metals. Based upon the results of these samples, it appears that contaminants have been released to the surface soils in the vicinity of the spent sand blast media collection points. Concentrations of metals above background levels were detected in all six of the samples collected. Organic compounds were also present in several of the samples collected. VOCs were limited to one detection of chloroform at 0.0012 u.g/g, which is well below the proposed Subpart S action level of 100 ng/g. SVOCs were detected in five of six soil samples. These were mostly polyaromatic hydrocarbons which are likely constituents in the paints present in the spent sand blast media. Concentrations of the polyaromatic hydrocarbons ranged from 0.2 to 4 p.g/g (MW, 1993).

3.6.3 Conclusions

It can be concluded from Phase I RFI sampling results that contamination of the environment has occurred at Buildings 600, 615, and 617 due to the sand blasting operations. It is also suspected that similar releases may have occurred at Buildings 603, 604, 612, 613, 637, and 647 from past sand blast operations at these locations.


It is recommended that Buildings 600, 615, and 617 be investigated further as is currently being done under the Phase II RFI. Based on the results of the ENPA site visits, it is also recommended that all past sand blasting media collection points be investigated for similar releases to the environment. These recently discovered sand blast areas have been designated SWMU 54 and will be investigated under the ongoing RFI. Sampling activities should include analyses for VOCs, SVOCs, and metals.

3.7 SWMU 46: WASTE OIL DUMPSTERS/STORAGE TANKS (AREE 7)

3.7.1 Description

Used oil dumpsters/storage tanks are present at seven locations within the BRAC parcel. These locations include Buildings 600, 602, 607, 611, 619, 620, 637, and 691 (Figure 3-1). Used oil from vehicle maintenance operations in these buildings is stored in dumpsters or holding tanks at each of these buildings. The used oil is routinely pumped from the dumpsters for off-site disposal by an oil recycling contractor. Oil stains surrounding the dumpsters and tanks were noted during the ENPA site inspections.


Based on results of the Phase I RFI sampling program, it appears that TRPH has been released to the surface and shallow subsurface soils at virtually all of the used oil dumpster locations sampled. Concentrations of TRPH in the surface soil samples ranged from 32.3 to 26,600 ng/g. The results of the samples collected from 1 feet were similar, with concentrations of TRPH being present in all samples and ranging from 35 to 50,700 îg/g. Some of the contamination at Building 637 may be the result of a large diesel oil spill that


occurred in the vicinity of the northeast comer of the structure. An inspection of the underground waste oil storage tank outside of Building 637 revealed indications of spillage around the tank (MW, 1993).

3.7.3 Conclusions

Based on the results of the Phase I RFI sampling and visual inspection during the ENPA site inspections, it is apparent that waste oil handling practices at the used oil dumpsters have released petroleum hydrocarbons to the nearby surface and shallow subsurface soils.


It is recommended that SWMU 46 be investigated further as is currently being done under the Phase II RFI. Also, improved waste oil handling techniques should be implemented to prevent further contamination.

3.8 SWMU 26: DEFENSE REUTILIZATION AND MARKETING OFFICE AREA (AREE 8)

3.8.1 Description

The DRMO is a 60-acre fenced area located adjacent to the eastern side of the BRAC parcel warehouses that consists of an open storage yard and several steel buildings (Figure 3-1). The DRMO primarily coordinates the sale, recycling, and disposal of TEAD-N refuse, and handles the contractual aspects of hazardous waste disposal for TEAD. The area is used for temporary storage of surplus material (no longer in use at the installation), prior to sale. The DRMO receives items from all of TEAD-N, including the Utah National Guard, located in the Administration Area. According to Mr. Red Ridder, the DRMO escort during the AGEISS site visits, the TEAD-N DRMO also serves the Tooele Army Depot - South Area (TEAD-S), the Eagle Test Range, and the Dugway Proving Ground. The DRMO yard is provided with rail and truck access.

A wide variety of items are present in large quantities at the DRMO. Abundant items observed at the DRMO during the site visits included: engines; generators; compressors; furniture; office machines; computer equipment; scientific instruments; inert ordnance; a variety of vehicles; vehicle and helicopter parts; miscellaneous dry goods and other similar saleable items; and steel and brass shell casings. According to Mr. Ridder, no unexploded ordnance (UXO), including chemical munitions from TEAD-S operations, are stored at the DRMO.

Large quantities of plastic and metal 55-gallon drums were observed at the DRMO; however, the vast majority of the drums were empty, and those which were full contained small pieces of scrap metals or similar nonliquid salvage materials. All drums reportedly arrive at the DRMO after they have been emptied and cleaned. Batteries are no longer stored at the DRMO, as these items are now recycled in the Maintenance and Supply Area on-post. One large transformer, reportedly free of PCBs, was observed at the DRMO during the site visits. According to Mr. Ridder, transformers are rarely sent through the DRMO. Mr. Ridder also stated that transformers which contain PCBs are not sent to the DRMO.

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Unused hazardous chemicals (such as paints, gear oils, acids, etc.) which are no longer required or which were not used prior to their recommended shelf life are also present at the DRMO. These hazardous materials, which cannot be sold and therefore will never be used, are stored as hazardous waste in Building 2025. However, if these hazardous materials can be sold for use according to their intended purpose, they are not considered waste, and are stored as hazardous materials in Building 2003 at the DRMO. Building 2001 was also reportedly used for hazardous materials storage in the past; however, during the site visits, only nonhazardous materials were observed in this structure. Hazardous chemical storage at these structures appeared to be conducted in accordance with the TEAD Environmental Office procedures. Evidence of contamination from these hazardous chemicals was not observed during the site visits.


According to an interpretation of a 1959 aerial photograph obtained from the Final Phase I RCRA Facilities Investigation Report (MW, 1993), the DRMO became active sometime between 1953 and 1959. The site is described in the interpretation as a storage yard with noticeable ground staining, debris piles, and container storage. In 1966, the site had been graded and drum storage and ground staining were observed.

Small areas of staining were identified at the DRMO during the ENPA site visits. Some sampling has previously been conducted throughout the vast DRMO yard. However, large quantities of salvage materials are moved in and out of the DRMO every day, therefore conditions and potential areas of contamination are ever changing. Residual fluids in engines, generators, compressors, and similar items stored in large quantities at the DRMO, have the potential to contaminate the underlying ground surface. Significant, large-scale contamination of this nature was not observed on-site, however.

A former bum area, now used for open storage, was observed during the site visits north of the warehouses at the DRMO. According to Mr. Louis Brems, the Chief of DRMO operations, this area was used in the past to burn rubber from steel tank tracks to facilitate the sale of the scrap steel. Sampling has reportedly occurred in this vicinity but no analytical results were provided.

Poor housekeeping resulting in localized ground stains was observed in some areas of the DRMO during the site visits. For example, prevalent staining was noted on the ground surface at waste oil collection points located outside of several DRMO saleable items warehouses. Oil stains were also observed on the concrete floors of these and other storage buildings, which reportedly resulted in leaks from improperly functioning forklifts. Additional staining was observed beneath many of the above ground fuel oil storage tanks associated with numerous DRMO structures. During the site visit, staining was also observed along the railroad tracks in the northern portion of the DRMO. Mr. Brems stated that some small diesel and oil spills had been reported at the DRMO overtime.

Results of the Phase I RFI sampling program indicated that various contaminants have been released to the surface and shallow subsurface soils at the DRMO. Contaminants detected included acetone, trichlorofluoromethane, benzo(a)anthracene, benzo(a)pyrene, benzo(k) fluoranthene, bis(2-ethylhexyl)phthalate, chrysene, fluoranthene, phenanthrene, pyrene, lead, cadmium, and cyanide.


3.8.3 Conclusions

Based on the results of the Phase I RFI sampling program, it appears that various contaminants have been released to the surface and shallow subsurface soils at the DRMO. Review of information gathered during the EN PA site visits also indicates that activities conducted at the DRMO have in the past, and continue to have the potential, to release contaminants to the environment.


Prior to excessing the property, all equipment and debris should be removed. The structures should be cleaned and decontaminated according to the installation's procedures for closing heavy industrial areas. Further sampling of surface and subsurface soils is recommended as part of the Phase II RFI. Analyses should include VOCs, SVOCs, and metals.

3.9 SWMU 38: INDUSTRIAL WASTEWATER TREATMENT PLANT (AREE 9)

3.9.1 Description

The IWTP is located within the southwest comer of the BRAG parcel (Figure 3-1). The majority of this facility was built in 1987; however, an additional structure, Building 716, is presently under construction. The IWTP began operations in November 1988 with a design capacity of 160,000 gpd. The facility treats an average of approximately 116,000 gpd of wastewater. Of this total, an average of 103,000 gpd of wastewater is recycled, and the remaining wastewater is discharged to the Tooele publicly-owned treatment works. Several structures and holding tanks are present at the IWTP complex. Structures at the IWTP are used for storage, housing for inflow and outflow pumps, and various process equipment. One small office structure was also noted at the IWTP during the site visits, as were four large- capacity bermed above ground tanks for storage of influent and effluent. Influent storage tanks are used to hold water flowing into the facility in the uncommon event that inflow exceeds the design capacity of the IWTP. Buildings 713 (process equipment) and 714 (materials storage) were constructed by contractors for their use. Process equipment to be operated by TEAD-N Facilities personnel is presently being installed in newly-constructed Building 716. Operations in Building 716 will replace all activities currently performed by contractors at the IWTP. Therefore, once all of the new process equipment is online, contractor operations at the IWTP will cease, and Buildings 713 and 714 will be removed from the area.

Water is treated at the IWTP by a variety of processes. Treatment at the IWTP includes air strippers for VOCs, a flocculator and clarifier for settling out metals, sand filters for filtering solids, and granular activated carbon (GAC) to remove VOCs and SVOCs (MW, 1993).

If a spill or similar unintentional release to the wastewater collection system is reported to Mr. Sullivan, IWTP processes will be modified to the extent necessary to treat the influent to the required extent. Mr. Sullivan stated that such releases are less likely than in the past, as an effort has been made throughout the TEAD-N manufacturing area to replace industrial chemicals with less hazardous substitutes. Following treatment to the desired concentrations, water at the IWTP is either recycled back through the Maintenance and Supply Area or pumped to the Tooele public water treatment facility.

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Good housekeeping practices are presently in effect at the IWTP, which was observed to be a modem, clean facility during the site visits.


During approximately a 1-year period when the facility first opened, shipping containers in which spent GAC was stored were left uncovered, and blown onto nearby surface soils along the west side of the facility. During the Phase I RFI, samples were collected and analyzed for VOCs, SVOCs, metals, and TCLP. Based on the results of the Phase I RFI sampling program, it appears that low levels of several metals and SVOCs have been released to the surface soils on the west side of the facility. Metals detected include cadmium, lead, and mercury. SVOCs detected include several phenols, dodecane, several polynuclear aromatic hydrocarbons, and numerous tentatively identified compounds. The presence of these compounds is consistent with those present in the spent GAC, which is the most likely source of the contamination in the nearby soils. None of the detected analytes in the soil samples exceed proposed Subpart S soil action levels where they have been established (MW, 1993).

3.9.3 Conclusions

Based on the results of the Phase I RFI sampling, it appears that several contaminants, mainly SVOCs, have been released to the surface soils in the vicinity of the spent GAC containers. The containers are no longer left open; however, so the source of contamination no longer exists.


Based on the results of the Phase I RFI sampling program, it is recommended that SWMU 38 be included for further soil sampling and evaluation as is currently being done under the Phase II RFI. Recommended analyses include VOCs, SVOCs, and metals.

3.10 ASBESTOS (AREE 10)

3.10.1 Description

In February 1991, an initial asbestos survey of all occupied buildings was conducted at TEAD. The results of the entire survey are provided in Appendix D and indicate that friable and nonfriable asbestos-containing material (ACM) is present at various locations throughout the facility. An additional survey was conducted in June 1992, in which abatement activities were noted as well as additional sampling that had occurred. In this survey report, it was noted that partial abatement of Building 611 (within the BRAC parcel) was completed, including removal of friable pipe insulation. At the time of the ENPA investigation, a complete record of abatement activities was unavailable (Pickering, 1992a). In 1992, an asbestos management plan was developed by Pickering Environmental Consultants, Inc. that was enacted to address unabated asbestos found during the asbestos survey. The management plan was developed pursuant to the Asbestos Hazard Emergency Response Act of 1986 to minimize exposure to asbestos and assist the facility in complying with the federal regulations (Pickering, 1992b).



Although friable and nonfriable ACM is known to exist within the BRAC parcel, a known friable release of asbestos fibers has not been documented. No friable ACM were noted during the visual inspections of the structures in the BRAC parcel.

3.10.3 Conclusions

Asbestos surveys have been conducted at various occupied areas throughout TEAD-N. ACM was found at various locations with heavier concentrations occurring in mechanical rooms of maintenance area structures within the BRAC parcel. It can be concluded that friable and nonfriable ACM exist within the BRAC parcel. An Asbestos Management Plan developed by Pickering Environmental Consultants, Inc. (1992b) has been implemented to address the asbestos issue.


It is recommended that the Asbestos Management Plan for TEAD be fully implemented and that known exposed friable asbestos be removed or encapsulated. Asbestos surveys should be continued and include every structure in the BRAC parcel, according to the Army's Asbestos Policy Guidance for Army BRAC Properties. Complete documentation of the location and quantity of asbestos in all buildings within the BRAC parcel is recommended.

3.11 PCB-CONTAINING TRANSFORMERS (AREE 11)

3.11.1 Description

PCB-containing transformers are in use within the BRAC parcel. The installation conducts an annual inspection of all PCB-containing transformers. The results of the 1993 inspection and a listing of all PCB-containing transformers are provided in Appendix E. During the review of this report, it was noted that none of the leaking transformers which contained PCBs in excess of 50 parts per million (ppm) identified during the 1993 Audit inspection were located in the BRAC parcel.


There are no known or suspected releases related to this AREE.

3.11.3 Conclusions

It can be concluded that PCB-containing transformers exist within the BRAC parcel. There are, however, no known or suspected releases associated with this AREE at this time. An annual inspection program is currently being performed.


It is recommended that the installation continue the annual PCB-containing transformer inspection program.

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3.12 UNDERGROUND STORAGE TANKS (AREE 12)

3.12.1 Description

Review of information that was available at the time of the site visits indicated that there are 21 regulated USTs at TEAD-N. Of these, it appears that 13 of them are located within the BRAC parcel. Moreover, there are in excess of 100 underground heating oil tanks at TEAD- N. Although these are excluded from State and Federal regulations, the Army does not recognize the exclusion as per Army Regulation 200-1 (Environmental Programs Branch, 1991). An inventory of the USTs at TEAD-N is provided in Appendix F.

According to the UST briefing document prepared for the TEAD Commander that summarizes the regulated UST plan, a release detection program was implemented on the TEAD in 1989. Following guidelines stated in Federal Regulations, tanks installed prior to 1965 were included in the program first, followed by a gradual inclusion of the rest of the tanks over the next 4 years. From 1991 to 1992, all State and Federal regulated tanks and the Emergency Generator were tightness tested and registered with the State of Utah for the Petroleum Storage Tank Fund. Although many of the tanks passed the tightness tests, not all of the piping passed. As such, there is still a leak potential. According to Larry McFariand, TEAD-N Environmental Coordinator, when an UST fails tightness testing, it is designated for closure and subsequent removal.


During the October 1993 site visits Mr. McFariand indicated that one tank at the Building 629 fueling station and one tank at Building 637 were potentially leaking as determined from tightness test failures. Since then, the tank at Building 629 has been removed, with removal of contaminated soil in progress. The tank at Building 637 has been placed under State temporary closure and will be removed by the end of the year. No other information was available concerning known or suspected releases associated with USTs.

3.12.3 Conclusions

Based on the results of tank testing and product inventorying, the potential for releases from USTs within the BRAC parcel exists. The magnitude of such releases is unknown at this time, however.


It is recommended that tank testing and other procedures outlined in the UST plan be continued, and that the installation maintain USTs in accordance with applicable Federal, State and local regulations. In addition, closure of all USTs no longer in use, including those containing heating oil, is also recommended. As part of a closure program, the former residential area once located in the Administration Area south of the main entrance road should be investigated (i.e., geophysical survey) to ensure all heating oil tanks were removed when the residential area was demolished.


3.13 ABOVE GROUND STORAGE TANKS (AREE 13)

3.13.1 Description

There are ASTs at over 100 locations within the BRAG parcel. The contents of these tanks includes propane, heating oil, used oil, solvents, antifreeze, diesel fuel, and various industrial wastes that are building-specific tanks approximately 500 gallons in volume. The majority of these are used for heating oil storage. Many are in deteriorating condition with indications of corrosion and potential leakage. Most do not have containment systems around them and many have indications of staining from overfilling, etc. Tank 582 is a large petroleum tank located within the BRAG parcel at the east side of the Maintenance and Supply Area. The tank is bermed with catch basins adjacent to it for product containment in the event of a spill. There were some indications of spillage such as staining at the tanker truck filling platform adjacent to the tank. An inventory of the ASTs within the BRAG parcel is provided as Appendix G of this report. No comprehensive management plan concerning the tanks was found to exist during the project investigation.


There are no known releases associated with the ASTs; however, it is possible that a release could have occurred from overfilling or could occur in the future from tank leakage due to contamination. There were indications of staining from overfilling at numerous locations.

3.13.3 Conclusions

Although there are over 100 ASTs within the BRAG parcel, no comprehensive management plan was found that addresses them. Many of the tanks are in deteriorating condition, and there were indications of spillage as evidenced by ground staining around them.


It is recommended that a comprehensive AST management plan be developed and implemented by the installation and that the installation maintain compliance with applicable AST regulations.

3.14 SWMU 52: DRAIN FIELD AND DISPOSAL TRENCHES (AREE 14)

3.14.1 Description

As part of the ENPA process, an aerial photographic site analysis was performed which identified a drain field, surface impoundment, and disposal trenches in the TEAD-N Administrative Area (ERI, 1993). No information has been found which identified the past activities in these areas. A walk-over of these areas was performed by TEAD-N personnel following the review of the aerial photographs to further identify these disposal features. The drain field and disposal trenches were located, but the surface impoundment could not be found. Based on the results of this surface observation, it appears that the disposal trenches were primarily used for construction debris (Oliver, 1994).

3.14.2 Known or Suspected Releases



3.14.3 Conclusions

There are no indications of contamination at this site based on available information. However, based on the aerial photographic site analysis, it appears that disposal activities have occurred at these locations. As such, further investigation is warranted.


A site investigation of the drain field and disposal trenches is recommended. Since the October 1993 ENPA site visits, the drain field and disposal trenches have been designated as SWMU 52 and will be investigated under the ongoing RFI. Soil samples should be collected from several locations at both the drain field and disposal trenches. The samples should be analyzed for VOCs, SVOCs, and metals. It is also recommended that a geophysical survey of the disposal trenches be conducted.

3.15 SWMU 55: BATTERY SHOP (AREE 15)

3.15.1 Description

On April 28, 1994, a site visit of TEAD-N was conducted by USDEQ-DSHW in which discussions with TEAD-N employees were conducted concerning historical operations in Building 618. During these discussions, it was indicated by the TEAD-N employees that Building 618, which is currently a cafeteria, was formerly a battery and plating shop. Subsequent to these discussions, real property historical records were reviewed. It was confirmed from this review that the building has been used as a battery shop in the past.



3.15.3 Conclusions

There are no indications of contamination at this site based on available information. However, based on the historical records search, it appears that battery and plating shop operations have occurred at Building 618 in the past which are worthy of investigation.


A site investigation of Building 618 is recommended. Based on the historical records search, the building has been designated SWMU 55 and will be investigated under the ongoing RFI (Oliver, 1994). At a minimum, soil samples should be collected from the area surrounding the building and analyzed for metals contamination. Also, a detailed background search for information about disposal practices from the battery and plating operations should be conducted.

3.16 SWMU 28: 90-DAY DRUM STORAGE AREA (AREE 16)

3.16.1 Description

AREE 16, the 90-Day Drum Storage Area (SWMU 28), consists of a 3.4-acre fenced lot located near the southern end of the Maintenance and Supply Area (Figure 3-1). Buildings


588, 596, and 656 are located within SWMU 28. The 90-Day Drum Storage Area is located adjacent to the northern region of the Drum Storage Areas (SWMU 29) and immediately east of the Sanitary Landfill (SWMUs 12 and 15). EPIC photographs from 1953, 1959, 1966, and 1981 indicate that until approximately 1983, when the facility was constructed, drums were never stored within the perimeter of the 90-Day Drum Storage Area (EPA, 1982). EPIC photographs from 1953 indicate that the site was previously used for vehicle storage. No ground staining or standing liquid was evident on any of the available EPIC photographs (MW, 1993).

Currently, drummed wastes including gasoline, phosphoric acid, sodium hydroxide, paint wastes, thinners, solvents, paint filters, blast grit, used oil, and antifreeze are stored above ground on pallets in this area. Drums remain sealed and are stored up to 90 days before being transported from the depot to a hazardous waste management facility by a contractor, or to the permanent storage facility in Building 528. This site is not included in the TEAD-N RCRA permit, because 90-day storage areas are not required to obtain interim status operating permits. Spill response procedures at the 90-Day Drum Storage Area are provided in TEAD-N's Spill Contingency Plan, Spill Prevention Control and Countermeasures Plan, and Hazardous Waste Management Plan. Spill control equipment and supplies are maintained at the site to aid in the cleanup of any spills. According to TEAD-N, the largest expected spill would be equal to the largest container (55 gallons) at the facility (MW, 1993).

During the ENPA site visit on August 23, 1994, the 90-Day Drum Storage Area was found to be well organized and contained. No evidence of spills was encountered.


SWMU 28 is currently under investigation within the scope of the Phase li RFI. Sampling at the 90-Day Drum Storage Area under Phase I RFI consisted of collecting eight samples of surface soils from areas where ground staining was observed. Samples were analyzed for total metals, VOCs, SVOCs, and TRPH. Contaminants detected included cadmium, lead, zinc, acetone, butlbenzyl phthalate, and TRPH (MW, 1993).

3.16.3 Conclusions

Based on the results of the Phase I RFI sampling program, it is apparent that metals and organic compounds have been released to the surface soils at SWMU 28. However, due to the biased sampling approach (sampling restricted to isolated stained areas), there is no evidence of widespread contamination.


Based on the results of the Phase I RFI sampling, it appears that activities at this SWMU have released contaminants, mainly metals and heavier petroleum hydrocarbons, to the environment. It is recommended that this SWMU be included in RFI Phase II activities. Recommended Phase II activities include subsurface soil sampling (3-5 feet deep) to determine the vertical extent of contaminants. In addition, sampling of non-stained areas is recommended to further delineate the aerial extent of contamination.

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3.17 SWMU 29: DRUM STORAGE AREAS (AREE 17)

3.17.1 Description

AREE 17 consists of two drum storage areas (northern and southern) located near the southern end of the Maintenance and Supply Area (Figure 3-1). The two areas are separated by the Maintenance and Supply Road. SWMU 29 is located in the vicinity of SWMU 28 (the 90-Day Drum Storage Area), which has been designated AREE 16 in this report (MW, 1993). The southern area (also known as the old lumber yard) is a fenced, 25-acre expanse of gravel and broken asphalt surface with a single warehouse (Building 576), and one smaller associated office facility (Building 589). Currently, as was observed during the August 23, 1994 ENPA site visit, Building 576 stores hazardous materials used at TEAD-N. Numerous Army Hemmet vehicles are parked outside the building. Drum storage was also observed outside of the southern end of Building 576 during the August 23, 1994 ENPA site visit. Historical aerial photographs show that the southern part of SWMU 29 has been used for the storage of drums, as well as cylinders, tanker trucks, and lumber (EPA, 1982). The northern area of SWMU 29 is a triangular-shaped, sparsely-vegetated, open area of approximately 5 acres. A 1953 aerial photograph shows drums stored in this area, while aerial photographs taken in 1959 and 1966 indicate that the drums were removed and that the area was unoccupied. An aerial photograph from 1981 shows debilitated vehicles stored in the western part of the northern area (EPA, 1982). Visual inspection of the northern area during the August 23, 1994 site visit revealed that the lot was vacant with no current storage of hazardous materials.

The Drum Storage Areas were used to store empty drums before they were returned to the originating contractor. Empty drums were reported to have been stored upside down to allow residual contents to drain and to keep precipitation out. Chemicals that may have been released due to this practice include solvents, degreasers, and oils (EAESTI, 1988). Additionally, 1959 and 1966 EPIC aerial photographs identify a portion of the southern area as a "pesticide storage lot" (MW, 1993).


The Drum Storage Areas have been investigated during both an Rl conducted by Roy F. Weston, Inc. in 1990, and during the ongoing RFI being conducted by Montgomery-Watson, Inc. A total of 45 soil borings at depths from 0 to 5 feet were drilled during the Rl and RFI. Contaminants detected in the soil borings included metals and cyanide, VOCs, SVOCs, pesticides, and TRPH. During the 1990 Rl, three groundwater monitoring wells were also installed and subsurface soil samples were collected from each of the three borings. Potential chemicals of concern in subsurface soils were identified as bis(2-ethylhexyl) phthalate and the metals mercury and selenium. Two of these wells were sampled, and the third was dry. Potential groundwater contaminants were bis(2-ethylhexyl phthalate) and the metals silver, arsenic, beryllium, chromium, copper, nickel, lead, and zinc. A VOC, TCE, was also detected in one of the downgradient wells. However, it was determined that this well lies within 700 feet of the closed industrial wastewater lagoon outfall ditch B, which is a known source of TCE contamination (MW, 1993).


3.17.3 Conclusions

Based on the results of the Rl and Phase I RFI sampling programs, it is apparent that various types of contaminants have been released to the surface and shallow subsurface soils at SWMU 29. However, it should be noted that all contaminants detected were either attributed to analytical laboratory contamination during sample extraction or were below Subpart S soil action levels.

3-17.4 Recommendations

Based on the results of the Rl and Phase I RFI sampling, there is evidence that activities at the Drum Storage Areas have released contaminants to the environment. Metals, VOCs, and pesticide compounds were identified in the soil samples. Because the RFI Phase I and Rl data provide sufficient coverage of AREE 17, it is recommended that the Phase I data be evaluated in the Phase II investigation to quantify health risks in a baseline risk assessment. Because present sample data provide analytical information for virtually the entire AREE, no additional samples collection is recommended at this time (MW, 1993).

3.18 SWMUs 2 AND 30: CONVEYANCE DITCHES AND LAGOONS (AREE 18)

3.18.1 Description

AREE 18 consists of conveyance ditches and lagoons that were associated with the IWL (SWMU 2) and the OIWL (SWMU 30). The OIWL consists of a gravel pit; some areas of former standing liquid (referred to as lagoons) and ground staining; and ditches A, E2, F, and H located in the western part of the BRAC parcel. The locations of these features were identified during the aerial photographic site analysis of the BRAC parcel (ERI, 1993). The gravel pit is located outside the BRAC parcel and thus is not part of AREE 18 (Figure 3-1). Before the construction of the IWL in 1965, liquid wastes containing solvents and heavy metals from maintenance operations (including degreasing, metal cleaning, stripping, and painting) were discharged to a widespread area through a series of outfalls and unlined ditches referenced to as the OIWL (Figure 3-1). The OIWL was operated for approximately 20 years at an estimated discharge rate of 125,000 gpd of wastewater (Weston, 1990). Portions of the OIWL ditches and lagoons were remediated as part of a RCRA remediation of the IWL. In addition, some remediated portions of these features have been paved for roads.

Between 1965 and 1988, following closure of the OIWL, the IWL received industrial wastewater from the Maintenance and Supply Area. The IWL consisted of an unlined evaporation lagoon (located northwest of the BRAC parcel) and the unlined conveyance ditches B, C, D, and E that tied into a main ditch (located west of the BRAC parcel). A waste stream originating from metal cleaning and stripping, sandblasting, steam cleaning, boiler plant waters, dynamometer test cells, overflow, spillage and leaks of effluent containing solvents, paint, photographic chemicals, and oils was delivered to the IWL at a rate of 125,000 gpd. The IWL was closed in 1988, and cleanup was completed in 1989. The cleanup in the area now occupied by the CMF consisted of a removal of contaminated soils in conveyance ditches to a depth of 12 feet. The IWL and conveyance ditch soils west of the present location of the CMF were remediated by removing contaminated soil to a depth of 20 inches and backfilling the trenches with clean soils (Figure 3-1). The contaminated soil was placed in the IWL located northwest of the BRAC parcel, which was then capped with a synthetic liner (REI, 1994b).



No investigation of the OIWL was conducted during the Phase I RFI; however, the ditches and lagoons associated with the OIWL were characterized during the Phase II RFI conducted by Rust Environment and Infrastructure, Inc. Widespread metals contamination was indicated throughout the entire OIWL area. Of these metals, chromium was found to be the primary contaminant. Barium, cadmium, cobalt, copper, lead, mercury, nickel, vanadium, and zinc contamination were also found to be present. The metals contamination, with the exception of chromium, is located primarily at the surface. In addition to the widespread elevated concentrations, localized high concentrations of metals were detected in the three lagoons identified within the BRAC parcel. No evidence of VOC contamination was detected in surface and near-surface soils from the OIWL area, presumably due to the fact that discharge to the OIWL ceased nearly 30 years ago. Volatization, degradation, and vertical migration over this period of time would have removed VOCs from the surface and near-surface soils. Any VOCs migrating vertically to the groundwater would be part of the present contaminant plume being monitored and remediated under the PCP for the IWL (REI, 1994b).

The IWL and associated ditches were investigated during the Phase I RFI. No Phase II RFI sampling was conducted in the portions of the IWL located within the BRAC parcel based on the results of Phase I activities (REI, 1994b). Chromium, lead, and VOCs were detected in wastewater and sludge samples collected from the IWL during the Phase I RFI (Advanced Sciences, Inc., 1991). TCE, chloroform, chromium, lead, methylene chloride, 1,1,1- trichloroethane, carbon tetrachloride, and benzene were detected in groundwater beneath the IWL at concentrations in excess of Federal Drinking Water Standards during the Phase I RFI. (REI, 1994b).

A contaminant plume is currently present in groundwater beneath and downgradient of the IWL and OIWL conveyance ditches and lagoons. The primary contaminant which comprises this plume is TCE. This plume has been estimated to be approximately 400 feet thick and 16,000 feet in length, resulting in an effective volume of 35 billion gallons of groundwater exceeding the 5 micrograms per liter maximum contaminant level established for TCE (REI, 1994b).

3.18.3 Conclusions

The OIWL trenches and lagoons were found to be widely contaminated with metals. The metals were detected at concentrations in excess of background levels in the upper 5 feet of soils, with the highest concentrations present at the surface. Sample results show that metals contamination is consistent throughout the entire OIWL area. SVOCs and VOCs do not appear to be chemicals of concern for soils under current conditions; however, a TCE plume typically associated with the IWL is present beneath SWMU 30.

The IWL conveyance ditches that are within the BRAC parcel are documented known sources of groundwater contamination. Subsurface soils, sludge, and groundwater samples collected from SWMU 2 features contain several VOCs, phenolic compounds, and explosive compounds. A TCE groundwater plume extends from the IWL conveyance ditches and lagoon to the northern TEAD-N boundary.



No further RFI investigations are recommended for the OIWL trenches and lagoons. Although risks to human health are below EPA and State of Utah risk-based criteria, some risks to ecological receptors appear to exist. These risks need to be evaluated further during the CMS that has been recommended for SWMU 30. The CMS will determine whether any remedial action is required to protect potential ecological receptors (REI, 1994b).

Although no further RFI/CMS investigations are recommended for the IWL conveyance ditches (SWMU 2) under the RFI, this SWMU has been retained as part of AREE 18 due to the fact that the conveyance ditches associated with the IWL west of the present CMF were only excavated to a depth of 20 inches. Additionally, no record of confirmatory sampling could be found. It is likely that significant contamination remains in the subsurface soil at the locations of the conveyance ditches. It is recommended that subsurface sampling be conducted to determine if contamination remains. If so, the contaminated soil should be excavated and properly disposed of. Analyses should include VOCs, SVOCs, and metals.

The source of groundwater contamination associated with AREE 18 has been minimized due to the fact that volatile contamination was not detected in soils associated with OIWL features, and the fact that contaminated soil associated with some of the IWL features has been removed or otherwise remediated. A pump and treat system is currently in operation downgradient of the Maintenance and Supply Area at the northern TEAD-N boundary to intercept and remediate contaminated groundwater which resulted from the TCE plume from previous wastewater disposal operations at AREE 18. As such, no additional groundwater sampling is recommended excluding sampling conducted to assess the effectiveness of the pump and treat system.

3.19 LEAD-BASED PAINT (AREE 19)

3.19.1 Description

The regulation that impacts the Tooele BRAC parcel is Title X (The Residential Lead-Based Paint Hazard Reduction Act of 1992) of Public Law 102-550. Title X drives BRAC lead-based paint policy for Army property transferred after January 1, 1995. Title X specifies specific actions for pre-1960 target housing and target housing constructed between 1960 and 1978. Army policy guidance defines target housing as "any Army housing constructed before 1978 in which any child less than 6 years of age resides or is expected to reside" (DA, 1993).

In the BRAC Administration Area, barracks and other housing-type structures exist that could potentially be used as such housing. To date, these barracks and other structures have not been used to house children less than 6 years of age. However, the intended future use of these barracks and other structures are uncertain at this time and accordingly are designated as AREE 19 in case of use as target housing.

The structures that have been designated as AREE 19 are shown on Figure 3-2 and include S-101; S-103; S-104; S-110; S-111; S-113; S-115; S-117; S-118; S-119; S-120; S-121; S-122; S-123; S-124; S-125; S-126; S-141; S-143; S-145; S-147; S-149; S-150; S-151; S-152; S-153; S-155; 1000; 1001; 1002; 1004; 1005; 1010; and Tooele Valley High School. These buildings were all constructed prior to 1978 (or no known construction dates are available) and are

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considered to have potential future use as target housing. Please refer to Table 2-1 for the buildings' current use and year built.


No known or suspected releases of lead-based paint have been reported. No lead-based paint surveys have been conducted.

3.19.3 Conclusions

Based on the results of the Community Re-Use Plan currently being developed for the TEAD BRAC parcel, barracks and other housing-type buildings could be used as target housing. If so, Title X will require the inspection and abatement of lead-based paint hazards.


Prior to allowing re-use of the structures listed above for target housing, inspection and abatement of lead-based paint must be conducted. Inspection requires a surface-by-surface investigation to determine the presence of lead-based paint and the provision of a report explaining the results of the investigation. Abatement inlcudes a set of measures designed to permanently eliminate lead-based paint hazards.

3.20 OTHER AREAS CONSIDERED (NON-AREES)

Some BRAC parcel areas of environmental concern that were documented in past investigations are not considered AREEs under this investigation, because they have been remediated or because preliminary investigation indicates that no further action is warranted. Also, areas of potential environmental concern that are not considered AREEs and have not been investigated in the past are discussed in this section. Specifically, these areas of concern do not indicate a release to the environment but may affect the expeditious transfer of the BRAC property, and thus should be addressed by the installation rather than through the CERCLA or RCRA processes. The following areas are discussed in detail within this section:

♦ Storage Tank for TCE (SWMU 44) ♦ CERCLA OU5 ♦ CERCLA OU6 ♦ Smaller 90-Day Collection Yards ♦ General Maintenance Building Condition (numerous structures) ♦ Radon ♦ UXO ♦ Spills

3.20.1 No Further Action SWMUs

Five no further action SWMUs or potential no further action SWMUs are discussed below.


3.20.1.1 Storage Tank for Trichloroethylene (SMWU 44)

The Storage Tank for TCE (SWMU 44) formerly located in Building 620, was considered a SWMU, because the tank contents were emptied into the industrial sewers connected to the IWL. In April 1991, the tank was turned over to the DRMO for salvage. The IWL and associated outfall ditches have been excavated and capped. Remediation of the contaminated groundwater associated with the IWL is underway. Because neither the tank nor the contamination originating from it remains at the site, no further action has been recommended for this SWMU (SvlW, 1993).

3.20.1.2 Former Transformer Storage Area (SWMU 17)

CERCLA OU5 consists of two SWMUs that are both within the BRAC parcel. Both of these SWMUs are currently pending a no further action decision, and as such, are not designated AREEs. The first SWMU is the Former Transformer Storage Area (SWMU 17), which refers to OSL 675B, located in the northern portion of the Maintenance Area of TEAD-N approximately 500 feet northwest of Building S-670 (Figure 3-1). The lot is unpaved but covered with gravel and encompasses an area of approximately 5 acres. One of the responsibilities of TEAD-N has been the receiving, storage, maintenance, and shipment of oil- containing electrical transformers and capacitors. Prior to 1979, long-term storage of thousands of transformers and capacitors was performed at Lot 675B. Many of the transformers contained PCB-contaminated oil (REI, 1994a). In 1979, all transformers were removed from the site for storage at Building 659 or for disposal. Following removal, the TEAD Facilities Engineering Division reportedly sampled surficial soils at the site to determine PCB concentrations. According to site personnel, no soil samples contained PCB concentrations greater than 50 ppm (EAESTI, 1988). Based on the results of the risk assessment conducted at OU5, no further action is currently recommended for SWMU 17.

3.20.1.3 PCB Storage Building 659 (SWMU 33)

The second area within OU5 is the PCB Storage Building 659 (SWMU 33). This is a TSCA- permitted facility used to store transformers. The building has a sealed concrete floor with a perimeter berm and diversion structures at each entrance for the containment of oil spills. The facility began operating in 1979 and is used to store thousands of transformers that were once stored on the OSLs. The transformers are stored on open pallets and in wooden crates within the building. As late as November 1992, PCB-contaminated transformers were still being removed from TEAD-N, with temporary storage occurring at Building 659 during the removal process. During the site visit in October 1993, approximately 6,000 transformers were stored in Building 659. According to installation personnel, the transformers were either empty, did not contain PCBs, were PCB-contaminated, or contained PCBs (Hoiman, 1993). The building was clean, well-maintained, and no evidence of PCB spills were noted. On the basis of reviews of operational and cleanup procedures at the building, it does not appear that additional investigations are warranted at SWMU 33.

3.20.1.4 Drummed Radioactive Waste Area (SWMU 9)

CERCLA OU6 consists of two sites where releases of radioactive contaminants were suspected to have occurred. This includes the Drummed Radioactive Waste Area (SWMU 9) and the Radioactive Waste Storage Building (SWMU 18). The Drummed Radioactive Waste Area consists of two areas that were previously identified as having been used for the storage

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of several 55-gallon drums containing low-level radioactive waste. During the Rl, a surface beta/gamma radiation survey was conducted across the two suspected areas of drum storage to determine if a release of radioactive materials had occurred. The first small area was scanned over its entire surface with no radioactivity detected above background. The second larger area was gridded and each grid line was scanned for beta/gamma radiation. Again, no areas of radioactivity above background were detected during the survey. Because of the lack of any elevated beta/gamma radiation, no surveys were conducted for alpha radiation. As a result of the radiation surveys, it was determined that no further investigation of SWMU 9 is warranted (REI, 1994a).

3.20.1.5 Radioactive Waste Storage Building (SWMU 18)

The Radioactive Waste Storage Building (SWMU 18) is located on the northern end of Building 659. This radioactive storage portion of the building is walled off and locked. The storage area is a Nuclear Regulatory Commission-licensed facility for the storage of radioactive materials. Low-level radioactive materials are stored in this area. Access to the materials is controlled, and periodic monitoring of the facility for releases of radioactive materials is performed. During a site visit in 1992, it was determined that further investigations at this facility were not warranted. Since this facility is an active licensed facility that is locked, well maintained, and monitored, it appears that no further investigations are required (REI, 1994a).

3.20.2 Installation-Based Considerations

Installation-based considerations are broad-based and include smaller 90-day collection yards, general maintenance building conditions, lead-based paint, radon, and UXO.

3.20.2.1 Smaller 90-Day Collection Yards

Many facilities within the BRAC parcel have small 90-day collection yards for the temporary storage of hazardous waste that is produced during industrial operations. These areas are slowly being phased out in favor of a larger yard outside the BRAC boundary. TEAD-N is implementing a program to reduce waste production through the use of less hazardous chemicals. When combined with the phase-out of many waste producing operations, the need for these smaller yards has been reduced. Visual inspection of the 90-day collection areas within the facility revealed that they are in excellent condition, and are fenced, and locked. Many, but not all of the 90-day areas are bermed. Moreover, the USDEQ-DSHW has inspected all 90-day collection yards and has not required TEAD-N to include these units in the RFI investigation.

3.20.2.2 General Maintenance Building Condition

The primary activities that occur in the maintenance buildings are related to major (military vehicles, etc.) and secondary (generators, compressors, etc.) item remanufacture. The maintenance buildings of concern include Buildings 600, 601, 602, 604, 606, 610, 611, 612, 613, 615, 620, 621, 637, 639, 647, and 691. The activities include receiving, unpacking, disassembly, cleaning, sand blasting, painting, overhaul, repair, reassembly, packing, and shipping. Each of the activities currently performed in the CMF occurred in the maintenance buildings prior to 1992, when the consolidated new facility came online. Many of the maintenance buildings were observed to be vacant during the site visits, as operations


previously conducted in these structures are now performed at the CMF. Most maintenance structures are currently limited to a single remanufacturing activity (such as the Building S-604 Power Train Rebuild Shop) or contain a specific type of manufacture-related equipment (such as the Building 613 Sheet Metal Shop).

Due to the nature of the industrial activities conducted in these buildings and the variety of materials used, such as solvents, paints, degreasers, greases and oils, widespread residual and local areas of contamination exist within the buildings. Some areas of localized contamination include, but are not limited to, caustic dip tanks and paint booths. Caustic dip tanks were used in Buildings 600, 604, 611, 615, and 637 to clean parts and remove corrosion and debris from working surfaces. The tanks consist of open vats of varying size that are ventilated with a hood above the tank. Parts are lowered into the tanks for a designated cycle or until clean. When the caustic solution was contaminated beyond usefulness, the tanks used to be drained in the IWL but are now drained into the IWTP system. The concrete floor below the tank in Building 615 is badly etched from caustic spills from the tanks. The tanks in Building 615 are no longer in use and are awaiting removal.

Vehicle paint booths, another area of localized contamination within the maintenance buildings, are currently operating in the Buildings 612, 615, and 647. The booths are enclosed facilities within the structures where spray painting of vehicle parts takes place. In the past, spray painting operations took place in Buildings 600, 602, 604, 611, 621, 639, and 691. Spray painting operations often leave a residue on the internal surfaces of the buildings.

Additionally, steam cleaning operations were prevalent in structures throughout the BRAC parcel. Overspray from these operations has potentially contaminated the interior surfaces of the structures. Oil stains and spillage of vehicle fluids such as antifreeze and hydraulic fluid are a common occurrence at operations of the type associated with maintenance activities. Stains and residue often remain. Also, residues from parts grinding, body work, welding and other related operations are often left which can potentially contaminate building surfaces.

Moreover, in the basement of Building 611 at the southwest end of the structure, there is a small arms testing and firing range. The range consists of two underground rooms connected by two buried steel tubes that are approximately 50 feet long. The north room contains the firing line where weapons were discharged through the steel tubes towards targets hanging at the end of the tubes. A system of electric cables reportedly positioned the targets from a control panel in the firing room. Located at the opposite end of the tubes is a room that contains a large volume of sand that functioned as the backstop for the bullets fired from the other room. The sand was occasionally sifted to recycle the bullets from it. Specific information was unavailable concerning the level of activity at the range. The majority of the bullets fired into the sand backstop at the small arms testing and firing range are made of lead with copper or possibly steel jacketing. It was reported that the sand was occasionally sifted to recycle the bullets. Although no information exists confirming a release of contaminants, the possibility exists that the sand contains lead and other heavy metals from the bullets.

According to Lloyd Laycock, CMF Common Area Project Manager, there is a system of decontamination that has been implemented and used to clean vacated structures in the past. These procedures, as implemented, were not recorded at any time. A consistent, common sense approach in accordance with promulgated TEAD-N environmental and safety guidelines were applied, however. It was reported that "courtesy inspections" by the TEAD Environmental Office, the TEAD Safety Office, and the TEAD Industrial Hygiene Office were


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performed at each of the buildings which were cleaned. Some of these inspections also included limited wipe sampling (particularly in areas where sand blasting was formerly conducted) and perhaps other sampling, performed by representatives of the TEAD offices listed above.

The specific system used to clean the buildings was described as follows:

1. Any process equipment (tanks, equipment, instruments, paint booths, sand blasters, etc.) remaining in the structures was addressed first. Prior to moving this equipment, liquids were drained, dusts were cleaned out, etc. These materials were disposed of in accordance with existing installation environmental and safety guidelines. For example, leftover oil in a machine would be drained, drummed, labeled, stored, and disposed appropriately for such a substance. Oils and greases were the materials most commonly encountered in process equipment during these building closures. Sand blasting equipment contained significant dust, suspected to contain detectable heavy metals. This dust was drummed and disposed of accordingly. In the event that process equipment contained liquids or solids of an unknown origin or composition, these materials were sampled and analyzed by the installation laboratory. These materials would be drummed and a temporary drum label affixed to them until the results of the laboratory analyses were available.

2. Once all of these materials were drained from the process equipment, Millwrights provided electricians to disconnect any power to the equipment. Similarly, plumbers and other personnel were contacted to disconnect any other utilities connected to the process equipment. Once the utilities were completely disconnected, the equipment was removed from the structure. None of the paint was chipped off any process equipment removed from the vicinity of former paint booths. If potential ACM was encountered at any time during process equipment removal, a sample would be collected and the material would be disposed of appropriately, based on the results of the analysis of this material. These samples were also sent to the installation laboratory.

3. Process equipment removed from structures was thoroughly steam cleaned after removal from a structure, and prior to such equipment being relinquished to Property Disposal.

4. The next step was to clean the floors and walls of the vacant structure. Floors were swept up, unless they encompassed the location of a former paint booth. If paint was present on the floor, an unnamed piece of heavy equipment with a blade was brought into the structure to chip the paint off the floors. Chipped paint pieces were drummed, etc. appropriately. If dynamometers or other pieces of equipment with oil, gas, diesel, etc. were prevalent in a structure (such as Building 637, for example), a portable steam cleaner was brought into the structure and the floors were steamcleaned. Steamcleaning effluent was routed to the IWTP via the existing wastewater distribution system in place at these structures. The floor drain system was cleaned out in each structure where the steamcleaning was conducted, once floor cleaning was completed.


5 Walls were cleaned by vacuuming in vacant structures, particularly if sand blasting operations had occurred in the past. Wall surfaces were also mopped in areas where heavy metal contamination was anticipated (i.e. where sand blasting had been performed).

There are no known or suspected releases to the environment from specific BRAC maintenance buildings that have been documented. Releases within the buildings, either specific cases such as spills or residual contamination, are known and were observed during the ENPA site visits. A seemingly effective system of building closing and cleaning/ decontamination has been implemented by the installation for the heavy maintenance buildings Visual observations of cleaned buildings indicate that the system is probably thorough and effective. It should be emphasized that many of the cleaned buildings have been scheduled to be reoccupied for various reasons.

It is recommended that the installation's procedures for closing and cleaning the heavy maintenance areas be documented on a building-by-building basis and filed with the installation's facilities maintenance branch, as such procedures may be critical for transfer of the property. Cracks and other signs of degradation to the structure's foundation should be investigated as potential pathways for releasing contaminants to the environment. Additionally, verification sampling, such as wipe sampling should be implemented on a regular basis with analyses specific to the building's historical use. Some kind of action levels should be set to determine at what level cleanup is considered effective. All sampling results should be filed with the installation's facilities maintenance branch.

3.20.2.3 Radon

A radon monitoring program has been conducted at TEAD-N. A July 1991 report indicates samples were taken at 35 structures including schools, hospitals, housing, day care centers, 24-hour operations, and a representative number of other structures at the base. Structures sampled that are within the BRAC parcel included Buildings 594, 595, 671, and 1000. The samples were taken over a 1-year period with results far below the action level of 4 picocunes per liter set by the EPA. Since the action level was not exceeded in any of the structures and only one structure within the BRAC parcel (Building 611) has a basement, radon was not identified as an AREE. Appendix H contains the radon survey results.

3.20.2.4 UXO

UXO is not considered to be of concern within the BRAC parcel. Although explosive ordnance has been stored and used on-post, no documentation exists to indicate it was used or stored within the BRAC parcel. Since the 1940's, the BRAC parcel has been utilized for personnel work, mostly vehicle maintenance and administration (REl, 1994a).

3.20.2.5 Spills

Lastly, spills that have occurred within the BRAC parcel are documented in the spill report in Appendix A. The installation has a spill contingency plan that is activated when an uncontrolled release of hazardous materials occurs. During the ENPA site visits and investigation of records, no evidence of improperly handled spills was encountered.

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4.0 HUMAN AND ENVIRONMENTAL RECEPTORS

Human and environmental receptors become at risk when contaminants are released to the environmental media (e.g., air, water, and soil) from primary sources. The environmental media can then become secondary sources for contaminant migration, as well as potential exposure media for human and environmental receptors. The pathways for contaminant migration from the BRAG parcel to potential receptors involve soil, groundwater, surface water, and air. Additionally, human and environmental receptors could come into direct contact with contaminants which have been stored or used on the BRAC parcel. Figure 4-1 illustrates the major primary and secondary sources of contamination, contaminant release and transport mechanisms, and potential exposure media for human and environmental receptors for the BRAC parcel. Each of the potential exposure media are discussed in detail below.

4.1 EXPOSURE TO GROUNDWATER

Human receptors can be exposed to contaminated groundwater when the groundwater is used as a household water supply. Use of contaminated groundwater for household purposes can lead to exposure through the ingestion, inhalation (e.g, inhalation of VOCs released while showering), and dermal contact routes.

Groundwater flow at the BRAC parcel generally follows topography, flowing across the installation in a northwesterly direction towards the Stansbury Mountains. Specifically, the alluvial groundwater flows through saturated fan deposits. Groundwater flowing through the bedrock does so through fractured sandstone, quartzite, limestone, and dolomite. These two groundwater sources consist of a single interconnected aquifer system. The general groundwater flow direction at TEAD-N is from southeast to northwest, with groundwater flowing from the east and south toward the center of the valley and finally north toward the Great Salt Lake. The flow direction is altered to some extent in the IWL area which is located outside of the BRAC parcel, where the alluvial aquifer encounters a fault-block bedrock ridge. Personnel at TEAD-N and residents of the nearby communities rely heavily on groundwater as their source of drinking water. In general, the municipal wells located on the installation are somewhat protected from past base activities. These municipal wells are located in the southeast portion of the installation, outside the boundaries of the BRAC parcel and upgradient from areas of known and suspected contamination. Three community water wells for the town of Grantsville are located downgradient (i.e., northwest) of the BRAC parcel (REI, 1994a).

Potential sources of groundwater contamination at the BRAC parcel include the following:

♦ Migration of groundwater contaminant plumes (TCE) from the IWL (SWMU 2) and the Sanitary Landfill (SWMUs 12 and 15)

♦ Migration of potential contaminants from the former industrial wastewater system, or from portions of the old system currently utilized in the new system

♦ Migration of potential contamination from the drain field and disposal trenches in the Administration Area

♦ Leaking USTs containing fuel oil and other petroleum products


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♦ Migration of potential contamination from the 90-Day Drum Storage Area (SWMU 28) and the Drum Storage Areas (SWMU 29)

♦ Migration of groundwater contamination associated with the drainage ditches and lagoons from SWMUs 2 and 30

Based on available sample results, TCE is the major groundwater contaminant detected at TEAD-N (ESE, 1991). The contamination has been attributed to the former operation of the IWL and unlined ditches which carried waste materials to the lagoon (ESE, 1991). The TCE plume appears to be migrating in a northwesterly direction from the site of the former industrial wastewater system.

A secondary source of TCE groundwater contamination is the Sanitary Landfill (SWMUs 12 and 15). The contamination has been attributed to hazardous waste disposal within the landfill. The resulting plume has been identified at the southern end of the Maintenance and Supply Area and appears to be migrating in a northwestemly direction (REI, 1994b).

Groundwater flow occurs in both alluvium and bedrock in the vicinity of the IWL due to the presence of a northeast to southwest oriented elongated block of tilted, metamorphosed sedimentary rock. Depth to bedrock in the area of the IWL ranges from ground surface to 400 feet below ground surface. In general, the alluvial groundwater flows to the northwest with a relatively flat gradient except in the vicinity of the bedrock block, where the hydraulic gradient steepens and deflects considerably. Altitudes of the bedrock directly influence the groundwater-flow patterns of the IWL area. Although the permeability of the bedrock material itself is low, extensive fracturing allows considerable groundwater flow. The fracture flow, however, is highly variable in the bedrock aquifer (SEC Donahue, 1993). A pump-and-treat system has been installed at the northwest boundary of the installation to treat TCE- contaminated groundwater before it travels off-post (Metcalf and Eddy, 1993). The treatment system currently treats approximately 5,000 gallons of groundwater per minute. As long as the treatment system remains effective in intercepting and treating the contaminant plume, the potential for human receptors living northwest of the installation to be exposed to contaminated groundwater is unlikely.

Environmental receptors can be exposed to contaminated groundwater through various pathways including groundwater used for irrigation purposes or groundwater in contact with surface water features. These situations are not likely for the area surrounding the BRAC parcel, so exposure of environmental receptors to contaminated groundwater is not considered to be significant.

The potential for groundwater contamination exists at 17 of the 19 AREEs identified during the ENPA at the TEAD-N BRAC parcel. AREE 10, friable and nonfriable ACM, is the only AREE not anticipated to potentially impact groundwater. The release of contaminants to the ground surface could potentially occur as a result of operations conducted at AREEs 1a, 1c, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 17, and 18. Underlying groundwater will not be impacted, however, unless a sufficient driving force is present to transport this surficial contamination to the depth of the water table. Due to the lack of annual precipitation at the TEAD-N installation, percolating surface water is not an effective transport mechanism to impact the underlying groundwater. Asphalt and concrete surfaces present in the vicinity of the BRAC parcel further reduce the potential for impact to groundwater; however, the integrity of some of these paved surfaces is such that some percolation is possible. Additionally, the presence of


impermeable paved surfaces may produce overall greater amounts of runoff which could increase percolation at unpaved areas. AREE 1a has the greatest potential for impact to groundwater, as the volume of water flowing through the stormwater system provides the driving force to transport contamination downward through the unsaturated zone.

The potential for groundwater contamination from operations conducted at AREEs 1b, 3, 12, and 18 is greater than that at the AREEs listed above. AREEs 1b, 3, 12, and 18 are located either entirely or at least partially beneath the ground surface, therefore potential contamination releases are in closer proximity to the saturated zone. AREE 1b has the greatest potential of these subsurface sources of potential contamination to impact underlying groundwater, as the volume of wastewater flowing through the new system provide a mechanism to transport contamination from areas of poor integrity (old connections) through the unsaturated zone into the water table aquifer.

It should be noted, that although some of these areas may be determined to contribute to the groundwater contamination, an extensive monitoring program and large-scale treatment system is currently in place to treat the TCE-contaminated groundwater plume which underlies the BRAC.

4.2 EXPOSURE TO SURFACE WATER

Because of the arid climate, surface water is a rare occurrence at the BRAC parcel. Most of the surface water on the BRAC parcel comes from precipitation. The surface water that does occur quickly evaporates, infiltrates, or is routed through the stormwater collection system. Surface water at the BRAC parcel could be a potential transporter of contamination to other media (e.g., air, soil, or groundwater) especially in the presence of occasional intense storms. However, since surface water is not a prominent environmental medium on the BRAC parcel, exposure to human and environmental receptors from contaminated surface water is not considered to be significant.

The potential for surface water contamination exists at ten of the 19 AREEs identified during the ENPA at the TEAD-N BRAC parcel. The release of contaminants to the ground surface could potentially occur as a result of operations conducted at AREEs 1a, 2, 4, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 17, and 18. Contaminants on the ground surface in these areas could potentially impact surface water via stormwater runoff; however, this scenario is unlikely in all but AREE 1a. AREE 1a is the only AREE where transportation of contamination to surface water is probable. The results of surface water sampling conducted at AREE 1a will indicate the concentration of contaminants in surface water as a result of AREE 1a activities.

4.3 EXPOSURE TO SOIL

Soil contamination is an important concern for the BRAC parcel, because contaminated soil can be a secondary source for releases to air, surface water, and groundwater. Human and environmental receptors can be exposed to contaminated soil through the ingestion, inhalation, and dermal contact routes. Some materials, depending on their concentrations, can present a greater risk to receptors as an inhalation hazard than as an ingestion hazard. The exposure can occur from volatile organic vapors or airborne particulates (i.e., contaminants bound to dust particles).


Potential sources of soil contamination at the BRAC parcel include the following:

♦ USTs ♦ ASTs ♦ Former storage areas ♦ Boiler Plant blowdown areas ♦ Used oil dumpsters ♦ Sand blast areas ♦ DRMO yard ♦ Radiator Repair Facility ♦ Old Wastewater Distribution System ♦ Compressor Condensate Drain ♦ Recycler's Building ♦ IWTP ♦ Drain field and disposal trenches ♦ Battery shop ♦ Chromic Acid/Alodine Drying Beds ♦ 90-Day Drum Storage Area ♦ Drum Storage Areas

The areas listed above warrant further investigation to determine whether contamination exists and, if so, to determine the nature and extent of the contamination present (Advanced Sciences, Inc., 1991).

4.4 EXPOSURE TO AIR

There are currently several areas of concern that involve potential sources of air contamination at the BRAC parcel. These include asbestos in buildings, lead-based paint, boiler plant emissions, paint booth emissions, solvent tanks, sand blast areas, and airborne paniculate and/or VOCs from contaminated soils.

The primary receptors of potential asbestos exposure would be humans occupying buildings containing this material. Potential human receptors include office and maintenance personnel as well as remediation and demolition personnel. Base-wide surveys are presently underway or complete for asbestos to determine the potential and the extent of this contaminant. Initial results indicate that asbestos is present in numerous buildings at the base.

The boilers, paint booths, solvent tanks, and sand blast areas on the installation are operating under permit from the USDEQ - Division of Air Quality. Also, no recent Notices of Violation were noted. (Strong, 1993).

AREEs have been identified that have potentially contaminated soils associated with them. These areas could become sources for the release of airborne particulates and/or VOC emissions depending on wind conditions and remedial activities that disturb the soil.


5.0 ENHANCED PRELIMINARY ASSESSMENT FINDINGS AND CONCLUSIONS

This ENPA report has been based primarily on the environmental conditions observed at TEAD-N, during the study period of this report as well as review of applicable documents. Past site conditions and management practices were evaluated, based on readily available records and the recollections of people interviewed. Every effort has been made within the scope of this task, to interview appropriate site personnel, especially those personnel with a historical perspective of site operations. In this section of the report, the conclusions and findings of this ENPA are summarized.

5.1 AREAS WITH MINIMAL POTENTIAL FOR ENVIRONMENTAL PROBLEMS

Through a review of available information, site visits, and interviews with TEAD-N personnel, the following areas within the BRAC parcel have been identified as having minimal potential for environmental problems associated with real estate transfer:

♦ The Administration Area, except for the drain field and disposal trenches and buildings with lead-based paint

♦ The CMF and immediately surrounding areas

♦ The OSLs at the west side of the Maintenance and Supply Area BRAC parcel, excluding those which are affected by AREEs

♦ The warehouses and tank storage buildings at the north end of the Maintenance and Supply Area, excluding Building 691

♦ The Combat Vehicle Test Facility

♦ Open fields and OSLs north and east of the DRMO

These areas with minimal potential for environmental problems are shown in Figure 5-1. It should be noted that even though the above areas may have a minimal potential for environmental problems, the groundwater plume underlies portions of these areas. Also, this report and the conditions represented within are limited to conditions observed and reported at the time of the site visits. It is possible that conditions may have changed since the project site visits or historical practices not uncovered may impact the investigation results.

5.2 SUMMARY OF ENPA FINDINGS AND CONCLUSIONS

In this report, 19 AREEs were identified within the BRAC parcel. Findings and recommendations for further action for each of the 19 AREEs are summarized in Table 5-1. Of these, 14 were found to be of limited areal extent and were readily geographically definable through either visual inspection or through extensive review of existing documentation and personal interviews of facility personnel. The five remaining AREEs, AREEs 10 through 13, and AREE 19 address installation programs for asbestos, PCB-containing transformers, USTs, ASTs, and lead-based paint.

Five AREEs were identified through the ENPA process that had not been previously identified by other investigations. These areas are now designated SWMUs, and are scheduled to be investigated under the ongoing RFI. These AREEs include the following:


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78

o AREEs 1 a, 1 b, and 1 c: Oid Wastewater Distribution System and Radiator Repair Facility (SWMU 49)

o AREE 3: Compressor Condensate Drain (SWMU 50) o AREE 4: Chromic Acid/Alodine Drying Beds (SWMU 51) ♦ AREE 14: Drain Field and Disposal Trenches (SWMU 52) o AREE 15: Battery Shop (SWMU 55)

Because of the complexity of AREE 1, the underground location of a major portion of the system, and the likely potential for past and current releases of significant contamination, a more extensive site investigation is recommended for the Old Wastewater Distribution System. Parts of this system are still in use within the new wastewater system.

Six AREEs are currently being studied under the Phase II RFI conducted by SAIC, as follows:

o AREE 2: Boiler Plant Blowdown Water (SWMU 47) o AREE 7: Waste Oil Dumpsters/Storage Tanks (SWMU 46) o AREE 8: DRMO Yard (SWMU 26) ♦ AREE 9: IWTP (SWMU 38) ♦ AREE 16: 90-Day Drum Storage Area (SWMU 28) ♦ AREE 17: Drum Storage Areas (SWMU 29)

Recommendations for these AREEs were made in accordance with the Phase I RFI recommendations.

One AREE, AREE 6 (Sand Blast Areas), expanded the current RFI investigation of sand blast areas from current operations only (SWMU 4) to include past operations (SWMU 54) as well. Recommendations for the past operations areas were made in accordance with the RFI investigations of current operations areas.

One AREE, AREE 5 (PCB-Related Areas), includes three SWMUs (SWMUs 31, 32, and 53) undergoing investigation under the ongoing CERCLA Rl and RCRA RFI. Recommendations for this AREE are consistent with those under the CERCLA and RCRA programs.

One AREE, AREE 18 (Conveyance Ditches and Lagoons - SWMUs 2 and 30) has been studied under a Phase II RFI and is recommended for inclusion in the CMS which is consistent with Phase II RFI recommendations. Additional sampling is recommended for portions of SWMU 2 for property transfer purposes.

The remaining five AREEs were designated facility-wide. These included Asbestos (AREE 10), PCB-Containing Transformers (AREE 11), USTs (AREE 12), and ASTs (AREE 13). Lead-based paint (AREE 19) is also included in this group, but is restricted to housing in the Administration Area. Continued implementation of existing management plans was recommended for AREEs 10, 11, and 12. Creation and implementation of a management plan for ASTs (AREE 13) was also recommended. Implementation of applicable regulations for AREE 19 was recommended depending on the results of the Community Re-Use Plan.

Finally, other areas within the BRAG were considered as part of the ENPA but not designated as AREEs. These include five SWMUs that have been documented in past investigations, but are designated as no further action SWMUs or potential no further action SWMUs:


♦ Storage Tank for TCE (SWMU 44) ♦ Former Transformer Storage Area (SWMU 17) ♦ PCB Storage Building 659 (SWMU 33) ♦ Drummed Radioactive Waste Area (SWMU 9) ♦ Radioactive Waste Storage Building (SWMU 18)

Also, five installation-based considerations that are not considered AREEs are identified. Specifically, these areas of concern do not indicate a release to the environment but may affect the expeditious transfer of the property, and thus should be addressed by the installation rather than through the CERCLA or RCRA processes. These include the following areas:

♦ Smaller 90-Day Collection Yards ♦ General Maintenance Building Condition (numerous structures) ♦ Radon ♦ UXO ♦ Spills


6.0 REFERENCES

Advanced Sciences, Inc. 1991, November. Final Tooele Army Depot - North Area Known Releases, RCRA Facility Investigation - Phase I.

Anderson, Scott (Utah Department of Environmental Quality). 1993, November 15. Letter to R. Glenn Roberts, Director, Industrial Risk Management, Tooele Army Depot.

DA (Department of the Army). 1993, November 5. Policy Guidance Lead-Based Paint and Asbestos in Army Properties Affected by Base Realignment and Closure.

EAESTI (EA Engineering, Science, and Technology, Inc.). 1988, December. Final Report Preliminary Assessment/Site Investigation Tooele Army Depot.

Environmental Programs Branch. 1991, July. Tooele Army Depot Underground Storage Tank Inventory List.

EPA (U.S. Environmental Protection Agency). 1982, January. Installation Assessment Tooele Army Depot (North Area), Utah. TS-PIC-0066.

ERI (Environmental Research Inc.). 1993, December. Aerial Photographic Site Analysis, BRAC Parcel - Tooele Army Depot-North, Utah.

ESE (Environmental Science and Engineering, Inc.). 1991, February. Groundwater Quality Assessment for Tooele Army Depot, Tooele, Utah.

Everitt, R.L and B.N. Kaliser. 1980. Geology for Assessment of Seismic Risk in Tooele and Rush Valleys, Tooele County, Utah. State of Utah, Department of Natural Resources. Special Study No. 51.

Fraiser, Roy. 1993, October. Personal Interview during ENPA Site Visit.

Herndon, Robert L. 1993, November. Memorandum Regarding Policy Guidance for Lead- Based Paint and Asbestos in Army Properties Affected by Base Realignment and Closure.

Holman, Judy. 1993, October. Personal Interview during ENPA Site Visit.

JMM (James M. Montgomery Consulting Engineers, Inc.). 1989, April. Corrective Action Plan for Ground-Water Remediation.

JMM. 1992, June. Data Collection Quality Assurance Plan Tooele Army Depot-North Area.

Kinsinger, Bob. 1993, October. Personal Interview during ENPA Site Visit.

McFarland, Larry. 1994a, February. Personal Communication with E. Kiely, AGEISS Environmental, Inc.

McFarland, Larry. 1994b, August. Personal Communication with E. Kiely, AGEISS Environmental, Inc.


Metcalf and Eddy. 1993, July. Tooele Army Depot - North, Groundwater Remediation Program, Extraction Wei! Work Plan. vol. I.

Moore, W.J. and M.L Sorensen. 1979. Geologic Map of the Tooele 1 1/2x2 1/2 Quadrangle, Utah: U.S. Geological Survey; 1:250,000 scale, Miscellaneous Investigations Series.

MW (Montgomery-Watson, Inc.). 1993, August. Final Phase I RCRA Facility Investigation Report.

NUS. 1987, August. Draft Interim RCRA Facility Assessment Tooele Army Depot

Office of the Facilities Engineer. 1991, April. Tooele Army Depot - Basic Information Maps.

Oliver, H. (Tooele Army Depot - Environmental Management Division). 1994, May 10. Letter to State of Utah, Department of Environmental Quality concerning the identification of non-solid waste management units (SWMUs) at Tooele Army Depot-North, EPA No. 3213820894.

Pickering (Pickering Environmental Consultants, Inc.). 1992a, February. Final Asbestos Survey Report for Tooele Army Depot, Tooele, Utah.

Pickering. 1992b, July. Asbestos Management Plan for the Tooele Army Depot, Tooele, Utah.

Razem, A.C. and J.I. Steiger. 1981. Ground-Water Conditions in Tooele Valley, Utah, 1976- 1978. Utah Department of Natural Resources Technical Publication no. 69.

REI (Rust Environment and Infrastructure, Inc.). 1994a, January. Tooele Army Depot-North Area Final Remedial Investigation Report for Operable Units 4-10.

REI. 1994b, August. Tooele Army Depot - North Area Final Draft RCRA Facilities Investigation Report Phase II Study of Known-Release SWMUs.

SEC Donahue, Inc. 1993, February. Tooele Army Depot-North Area Phase II RCRA Facility Investigation Known-Release SWMUs Final Data Collection Quality Assurance Plan.

Strong, Mike. 1993, December. Personal Communication with E. Kiely, AGEISS Environmental, Inc.

Sullivan, Pat. 1993, October. Personal Interview during ENPA Site Visit.

UDH (Utah Department of Health). 1993, May. Utah's Vital Statistics Annual Report: 1990. Technical Report no. 169.

USAEC (U.S. Army Environmental Center). 1994. Review Comments of Draft Enhanced Preliminary Assessment Report (ENPA).

USATHAMA (U.S. Army Toxic and Hazardous Materials Agency). 1979, December. Installation Assessment of Tooeie Army Depot.


USCOE (U.S. Army Corp of Engineers). 1993. The Development and Implementation of a Hydrogeologie Flow Model for Application to a Pump-and-Treat System - Tooele Army Depot, Utah.

USDEQ (State of Utah, Department of Environmental Quality). 1993, November. Letter concerning the Addition of Solid Waste Management Units (SWMUs) to the Tooele Army Depot-North, EPA # UT3213820894 Post-Closure Permit.

USGS (U.S. Geological Survey). 1953. Tooele, Utah 1:250,000 Scale Topographic Map.

Weston (Roy F. Weston, Inc.). 1990, December. Tooele Army Depot - North Area Remedial Investigation Final Remedial Investigation Report.


APPENDIX A

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A-7

APPENDIX B

LIST OF PERSONNEL INTERVIEWED FOR THE ENHANCED PRELIMINARY ASSESSMENT

fable B-1. List of People Interviewed. Page 1 of 2.

#

•

No. Date Name Title Organization

1 10/12/93 Larry McFarland BRAC Environmental Coordinator TEAD - Environmental Office

2 10/12/93 Larry Fisher Environmental Engineer TEAD - Environmental Office

3 10/12/93 Walton Levi Environmental Engineer TEAD - Environmental Office

4 10/12/93 Mike Strong Environmental Engineer TEAD - Environmental Office

5 10/12/93 Dean Higley Environmental Engineer TEAD - Environmental Office

6 10/12/93 Al Porter Program Analyst TEAD - Environmental Office

7 10/13/93 Diana Lujan Supervisor- Bldg. 1000 TEAD

8 10/13/93 David Wayland Technician - Bldg. 1011 TEAD

9 10/13/93 Sergeant Dennison NA Utah National Guard

10 10/13/93 Julie Robbins Hazardous Waste Specialist - Bldg. 615

TEAD

11 10/13/93 Max Schiess Environmental Protection Specialist

TEAD - Environmental Office

12 10/14/93 Monty Rashwan Environmental Engineer TEAD - Environmental Office

13 10/14/93 Dave Bleazard Chief, Planning Branch Defense Logistics Agency

14 10/14/93 Ron Levitt Warehousing Foreman Defense Logistics Agency

15 10/14/93 Pat Neugent Warehouseman - Bldg. 659 Defense Logistics Agency

16 10/14/93 Judy Holman Process Planner for Hazardous Materials

Defense Logistics Agency

17 10/14/93 John Harless Front Desk Clerk - Bldg. 1004 TEAD

18 10/21/93 Bryce Christansen Radiation Protection Officer TEAD - Safety Office

19 10/13/93 Brad Maulding Compliance Specialist - RCRA State of Utah RCRA Office

20 10/13/93 Dave Larson TEAD Lead - RCRA State of Utah RCRA Office

21 10/13/93 Donald Jones Plant Manager TEAD - Vehicle Remanufacturing Facility

22 10/13/93 Richard Perrella Hazardous Waste Specialist - Bldg. 619 &602

TEAD

23 10/13/93 Jerry Dugdale Hazardous Waste Specialist - Bldg. 612

TEAD

24 10/13/93 Ruth Olson Assistant to Lloyd Laycock TEAD

25 10/13/93 Lloyd Laycock Consolidated Maintenance Facility Common Area Project Manager

TEAD

26 10/14/93 Mike Powell Manager - Battery Repair and Charging Shop

TEAD

Note:

AEC_TE Rev. 09/C

An acronym lis

=\D01\FINALE )5/94; 9:15am

t is provided on the last page o

NPVTABB1.ENP

this table.

B-1

FINAL

Table B-1. List of People interviewed. Page 2 of 2.

No. Date Name Title Organization _J , a M 27 10/15/93 Nancy Johnson Records Specialist State of Utah CERCLA and ™

Environmental Response Branch

28 10/25/93 Steve Cash General Engineer TEAD - Facilities Office

29 10/25/93 Dorinda Benson Real Property Technician/Specialist

TEAD - Facilities Office

30 10/25/93 Bob Kinsinger Mechanical Engineer TEAD - Facilities Office

31 10/25/93 Robert Marshall Engineering Technician TEAD - Facilities Office

32 10/25/93 Randy Tyler Civil Engineer TEAD - Facilities Office

33 10/25/93 Pat Sullivan Chemical Engineer TEAD - Facilities Office

34 10/25/93 Tom Ware Utilities Branch Chief TEAD

35 10/25/93 Roy Fraiser Depot Photographer TEAD - Photo Lab

36 10/25/93 Red Ridder DRMO Assistant TEAD

37 10/25/93 Louis Brems Chief, DRMO Operations TEAD

38 10/26/93 Brian Slade Environmental Health Scientist Tooele County Health Department

39 10/26/93 J. Raymond Johnson Professional Engineer, Director Tooele County Department of Engineering ^_

40 10/27/93 Various Clerks Engineer's Assistants City of Tooele Engineer's ^B Office

41 10/28/93 Anne Kelly Database Coordinator TEAD - Environmental Office

42 10/07/93 Henry Schroeder TEAD CERCLA Lead/Remedial Project Manager

EPA Region VIII CERCLA Office

43 10/07/93 Stan Zanistowski TEAD RCRA Lead EPA Region VIII RCRA Office

44 10/26/93 Bob Pannunzio Boiler Plant Operator TEAD

45 10/26/93 Gary Poloskey Plumber TEAD

46 11/10/93 Jeff Coombs Inspector Tooele County Health Department

47 11/08/93 Russ Flint Hazardous Waste Manifest Coordinator

TEAD-DRMO

Bldg. Building CERCLA Comprehensive Environmental Response, Compensation, and Liability Act DRMO Defense Reutilization and Marketing Office EPA U.S. Environmental Protection Agency NA Not Available No. Number RCRA Resource Conservation and Recovery Act TEAD Tooele Army Depot

AEC_TEP\D01\FINALENP\TABB1.ENP Rev. 11/08/93; 12:22pm

B-2

FINAL

APPENDIX C

PHOTOGRAPHS OF AREAS REQUIRING ENVIRONMENTAL EVALUATION

Photograph 1. (AREE 1a - Current Stormwater Sewer System). View Southwest of Storm Drainage Outfall Near Building 614.

Photograph 2. (AREE 1c - Radiator Repair Facility). View of the Radiator Repair Facility in Building 609.

AEC_TEP\D01\FINAL.ENP\PHLOGNEW.ENP Rev. 08/30/94; 9:29am

FINAL

C-1

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«s«

Photograph 3. (AREE 2 - SWMU 47: Boiler Plant Blowdown Water). View of Boiler Blowdown Sump in Building 637.

Photograph 4. (AREE 3 - Compressor Condensate Drain). View East of Compressor Condensate Drainage System Outside Building 619.

AEC_TEP\D01\FINALENP\PHLOGNEW.ENP Rev. 09/05/94; 9:13am C-2

FINAL

Photograph 5. (AREE 4 - SWMU 51: Chromic Acid/Alodine Drying Beds). View Northwest of Chromic Acid/Alodine Drying Beds Marked as Building 623.

Photograph 6. (AREE 6 - SWMU 4: Sand Blast Areas). View South of Building 615 Sand Blast Grit Collection Area.

AEC_TEP\D01\FINALENP\PHLOGNEW.ENP Rsv. 09/05/94; 9:13am C-3

FINAL

Photograph 7. (AREE 7 - SWMU 46: Waste Oil Dumpsters/Storage Tanks). View of Used Oil Tank at the North End of Building 637.

Photograph 8. (AREE 7 - SWMU 46: Waste Oil Dumpsters/Storage Tanks). View of Underground Used Oil Tank at the South End of Building 637.

AEC_TEP\D01\FINALENP\PHL0GNEW.ENP Rev. 08/30/94; 8:42am C-4

FINAL

&ÄHW illiP

Photograph 9. (AREE 8 - SWMU 26: Defense Reutilization and Marketing Office Area). View North of the Defense Reutilization and Marketing Office Yard.

Photograph 10. (AREE 8 - SWMU 26: Defense Reutilization and Marketing Office Area). View North of 90mm Shell Casings Awaiting Sale in the Defense Reutilization and Marketing Office Yard.

AEC_TEP\D01\FINAL.ENP\PHLOGNEW.ENP Rev. 08/30/94; 8:42am C-5

FINAL

Photograph 11. (AREE 12 - Underground Storage Tanks). View South of Three Underground Storage Tanks Adjacent to Building 606.

Photograph 12. (AREE 13-Above Ground Storage Tanks). View Southwest of 1,500-Gallon Above Ground Diesel Storage Tank with Staining at the Base Adjacent to the Building on Open Storage Lot 655-5.

AEC_TEP\D01\FINALENP\PHL0GNEW.ENP Rev. 08/30/94; 9:34am C-6

FINAL

a

-\t» : ■■^.y

Photograph 13. (AREE 15 - SWMU 55: Battery Shop). View of the Former Location of the Battery Shop in Building 618.

Photograph 14. (AREE 16 - SWMU 28: 90-Day Drum Storage Area). View Towards the Northwest of the 90-Day Drum Storage Area.

AEC_TEP\D01\FINALENP\PHLOGNEW.ENP Rev. 08/30/94; 9:35am C-7

FINAL

Photograph 15. (AREE 17 - SWMU 29: Drum Storage Areas). View to the Northeast of the Drum Storage Areas.

Photograph 16. (AREE 18 - SWMUs 2 and 30: Conveyance Ditches and Lagoons). View to the Southeast of the Location of a Former Drainage Ditch Along Avenue E.

AEC_TEP\D01\F1NAL.ENP\PHL0GNEW.ENP Rev. 09/05/94; 9:13am C-8

FINAL

APPENDIX D

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D-40

APPENDIX E

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E-4

APPENDIX F

UNDERGROUND STORAGE TANK INVENTORY

KEAT INS OIL UNDERGROUND STORAGE TANKS

C0.E. CAPACITY

STATE-» BUILDING- UTTO- (gal) IN5TAL DATE

S-114 114 54 3000 1972

S-117 SI 17 3000 1972

s-na £118 £6 2000 1972

S-120 120 57 2000 1972

S-121 £121 53 3000 1972

S-122 122 59 2000 1972 c-i^-iy £-1227 CO 3000 1 972

£-1226 £-1228 CO 3000 1972

S-124 124 60 • 2000 1972

S-125 £125 61 1500 1972

S-1250A 1250A 42 1000 1972

S-12508 12508 43 1000 1972

S-126 £125 62 2000 1972

S-130 £130 63 3000 1972

£-145 £145 64 1500 1972

S-151 £151 66 1500 1972

S-153 £-153 67 4000 1972

S-301 301 8 1000 1972

S-2013 £-2013 16 2500 1932

S-37 1237-2 37 2S672 1972

S-375 1237 38 7168' 1972

£-416 20000 1972

S-503 £-503 69 1000 1972

S-519 519 10 1000 1972

S-522 522 77 500 1972

S-539 £-539 11 1000 1972

S-541 541 13 1000 1953 ,

S-553 £-553 14 1300 1933 S-595 595 73 10000 1972 S-594 594 123 5000 1972 S-506A 606 T1 79 40000 1972 S-606B 606 T2 80 40000 1972 S-606C 606 T3 81 40000 1972

S-606D S-506T4 82 1000 1972 S-510A 610T1 117 19905 1 972

S-610B 510 T2 113 19905 1972

S-610C 610 T3 1 19 19905 1972 S-614A 614T1 120 2000 1972 S-671 671 104 10000 1972 S-691D 691 95 15000 1972 r- -7TC I 3~{JJH / JD

1 /\f\S\ 1 mo

F-1

HEATING OIL UNDERGROUND 5TORAC£ TANKS

C.O.E. CAPACITY

STATE* BUILDING* UTTO* (gal) INSTAL DATE

1000A 1000TI 98 1000 1972

10008 1000T2 99 1000 1972

1002 1002 100 1000 1972

1005 1005 101 5000 1972

1201 1201 21 3000 1972

1202 1202 -70 3000 1972

1203 1203 23 3000 1972

1204 1204 24 3000 1972

1222 1222 133 2000 1972

1279 1278 45 1000 1972

1325-7 1325 107 6000 1983 1 T AT 1 V"W 1343 108 16048 1972

1351 1351 109 1000 1972 1365 1356 110 600 1972 1375 1375 111 6000 1972 1375-A 1376A 112 1000 1972 2010 2010 1 14 1000 19S5

25 25 30 255 1972 25 25 31 265 1972 27 27 32 255 1972 28 2S 34 255 1972 35 33 36 3000 1972 508 S-508 70 30000 1972 519 519 75 3000 1972 520 520 75 3000 1972

1253 44 2000 1972 6143 614T2 121 1000 1972 O i 0 6 16 122 1000 1972 T-1 T-1 20 2100 1972 C-7045 7045 124 350 1985 S-10 S-10 1 1500 1955 C-7065 C-7065 19 2000 1975 S-101 S-1 0 1 • 47 1000 1972 S-103 SI 03 43 1000 1972 S-104 104 An "7 SS/\/\

S-10A 10-71 23 1000 1972 S-110 S-110 50 1500 1972 S-1 11 S-1 1 1 51 1500 1972 S-! 12 SI 12 52 1500 1972

S-1 13 1 13 C~7 _> V V V

F-2

HEAT INS OIL UNDERGROUND STORAGE 7ANK5

C.O.E. CAPACI7Y

STATE* BUILDING* U770- (gai) INS7AL DATE

S-7333 753 97 1000 1972

S-7 S-7 25 500 1972 S-7001 S-7001 17 10000 1982

£-8 S-S 26 3100 1972

S-79 2000 1972

S-? c_c 27 1000 1972

S37C 1237 40 7163 1972 S147 S147 63 3000 1972

S10S 108 125 2000 1940 T6-4 73-4 1 16 5000 1972

^00 63 1987

637 T6 102 1987 637 77 103 1987

527 106 1972 1001-71 127 1972 1001-12 126 1972 1004 129 1972 1010 130 1972 105 131 1972 109 132 1985

108 133 1985 141 134 1972 139 135 1985 143 136 1972 1320 137 1222 138 1972 1252 139 1972 , 150 151 152 152 201-1 133 201-2 154 202-1 155 202-2 156 203-1 157

203-2 155 204-1 159 204-2 160 205-1 161 205-2 162 206-1 163 206-2 164

F-3

HEATING OIL UNDERGROUND ST0RA6E TANKS

C.O.E. CAPACITY

STATE* 5UILDIN8* UTTO- (gol) INSTAL DATE

207-1 165

207-2 166 206-1 167

206-2 163

209-1 169

209-2 170

210-1 171

210-2 172

21 1-1 173 211-2 174

212-1 175 212-2 176 213-1 177 213-2 173 T14 179 IOTA 181 101B 132 101C 183 101D 184

" 101E 185 1C2A 186 1C2S 187 103A 188 1033 169 1043 191 1C5A 192 1033 193 , 106A 194 1063 195 1G7A - 196 1073 197 106A 198 109A 200 1093 201 109C 202 1090 203 109E 204 109F 205

F-4

VEHICLE FUEL AND SOLVENT UNDERGROUND STORAGE TANKS

UTTO# STATE* 3LDG# INSTAL. DATS

CAPACITY (GAL)

PRODUCT IAST STORED

002 003 004 005 006 007 071 072 0S3 084 035 086 087 088 089 090 091 092 093 094 126

129-T1 129 129-T2 129 129-T3 129 129-T4 129 146-T1 146 146-T2 146 512 A 512 512B 512 S-629A 629 S-6293 629 S-629C 629 S-629D 629 S-6373 637 S-637C 637 S-S37D 637 S-637-T4 637 S-637-T5 637 S-637-T6 637 S-691A 691 S-6913 691 611-A 611

1932 1982 1982 1982 1972 1956 1972 1972 1969 1974 1969 1969 1969 1969 1969 1978 1978 1978 1970 1970 1972

10K 10K 10K 10K 15275 19054 11790 11790 11400 11380 2K 6X 5K 3K 200 5K 3K 500 2X 2K 63C

GAS VEHICLE FUEL GAS VEHICLE FUEL DF#2 VEHICLE FUEL DF#2 VEHICLE FUEL DF#2 STORED FUEL DF#2 STORED FUEL GAS VEHICLE FUEL DF#2 VESICL: GAS VEHICLE I DF#2 VEHICLE I KEROSENE SOLVENTS DF#2 DYNO FUE GAS DYNO FUE3 USED OIL DF#2 DYNO FUE GAS DYNO FUEL USED OIL DP#2 »^ "'"'■* FUEL DF#2 VESICLE FUEL GAS GENERATOR TESTING FUEL

BOLD USTs are scheduled to be removed in FY 93.

Tie following USTs have line leak detectors installed on the piping 129-T1, 129-T2, 129-T3, 129-T4, 512A, 512B, S-62SA, S-6293, S-637-T4, S-637-T5.

F-5

EMERGENCY GENERATOR

UNDERGROUND STORAGE TANKS

C.O.E. CAPACITY

STATE* BUILDING* UTTO* (gal) INSTAL DATE

13763 1376 113 1000 1572

S-10B S-10 29 50 1972

S-ll S-10 115 100 1972 S-2011 2011 15 10000 1982 S-543 543 12 300 1972

F-6

APPENDIX G

BRAC PARCEL ABOVE GROUND STORAGE TANK INVENTORY

3 "*c" ^ 993 R2 " W " ' A3CV3 GROUND STORAGE TAME INVENTORY (3RAC PARCSL)

ID. NO.

ooo=?w:

0115F51

012CFW1

Cli^rii

012SFE1

0147KE1

0143FS1

C15CFW1

0151FE1

0155121

052 5-1HN1

05S7FS1

05 3 31N1

053SFW1

0533WS1

05 94SW1

C60CCAW1

QgQOCHNl

0600JE1

050CXAS1

06C1RKW1

0S02AFS1

06C2DN1

06C2FN1

05C2FN2

C602FN3

0 6C2FN4

C50SASN1

LOCATION

W cf Classroom 5

E. side 118

W. side 120

S. side 122

E. side 126

E. side 147

SO' S of 149

W. side 150

E cf 151

E of 155

N 535-1 (Ir.dfi;

SW c: ■87

100' N 588

25' W/SW 588

SS cf T-589

2 00' W/SW 5 94

S side cOOC

N sice 600C

S 600 Deer 2

£W cf 6 0 0C

W side 641R

SW corner 6 0.2A

NE of 6 02

NW cf 602

NW cf 602

NW of 602

NW of 602

NW To OSA

CAPACITY

2 50 Gal

125 Gal

125 Gal

125 Gal

25 0 Gal

10CO Gal

125 Gal

124 Gal

— — A r* — "!

250 Gaj.

.000 Gal

500C Gal

45 3 Gal

K s: Ci

:= ri:

2 5 00 Gal

3 0 Gal

500 Gal

600 Gal

250 Gal

124 Gal

250 Gal

439 Gal

\ 4 99 Gal

4 93 Gal

499 Gal

Gal

CONTENTS STATUS

Frcoane

Frcoane

Frcoane

Frcoane

Frcoane

Hestinc Oil

Frcoane

Frocane

Frcoane

Keating Oil

Keatinc Oil

Frcoane

Used Oil

Frcoane

Water

Solvent HID?

Used Anti frz

Heacincr Oil

Used Anti frz

Heatinc Oil

rooane

Diesel

rrcoane

Prooane

Frooane

Frcoane

HEX

G-1

a E« 13*2, W ^^ fliraRÄfiS 5A2W INVENTORY (3RAC PARCEL)

( -D. NO. LOCATION CAPACITY CONTENTS STATUS |

j n<;1 o~Ni N side 610 499 Gal ^^^csr.s ■

n«'i;ci 200' S 614 15,075 Gal Frccane _

C61SE21 E 613, Doer S 60C C-ai Truck test Ballast

! 0612EE2 i

Z 619, Deer 8 62 0 Gal Truck test ^s" 1 SS t !

Qgi eac «V C 613 100C Gal Frccane i

flglQDW1 200'W/NW 631 10 00 Gal Frccane 1

0620PW1 30' W 620 1000 Gal ^"*"->cane . —

0621PW1 W sice 621 1000 Gal Frccane

062*-W2 W side 621 1000 Gal Frccane

0 o 21 SKW1 W side 62IS 2=0 Gal Keatir-c Oil

06'2-Wl W 622 CSD UNI 250 Gal Heating Oil

n': ST/VI N 629 (GS STA) 10 00 Gal Van Gas

0S29VN2 N 62 9 (GS STA) 10C0 Gal Van Gas

0£~ ■~i± S3 C 631 10 00 Gal Prceane ___ ——j

Qtf-51 r£2 SE C 631 10 00 Gal Precar.e

0S~i a-w*l W side 631 10C0 C-al Precans

0621FW1Q W side 631 1000 Gal Frccane

063-?W2 W side 631 10 00 Gal Prccane 1

0 s -J i ~W3 W side 631 1000 Gal Frccane

0631PW4 W sice 631 1000 Gal Frccane

0631PW5 W side 631 10 00 C-al Frccane i

0 6"" -W6 W side 631 10CC Gal Frccane I

0631FW7 W side 631 1000 Gal Frccane

OJT i -V78 W side 631 1000 Gal Frooane i

0«*i-W9 W side 631 1000 Gal Precans 1 og--="W1 W side 631R 250 Gal Heating Oil

i

0^37nEl E wall 63 7 200 Gal Diesel l

Q£ - 7P)C1 SW C 63 7 500 Gal r; -' s c ~"!

C ä"7^-i E wall 63 7 1CÖ Gal Mocas i

C^M'N'i NE C 62 7 4 95 Gal Procane 1

G-2

8 c« 1393, RJ3ovs GR0Cjro STCRAg5 TANK ISVSaTCRY (3RAC PARCSL)

ID, NO.

0S77RK21

0679KS1

06S7HS1

0691DS1

0691DE2

0691DN1

0691DN3

0691DN2

C691DW1

0631131

0631FW1

0699FW1

C710T2WN1

0710T1SN1

07I2T1WM1

0712T2WN2

Q71SFS1

071SFS2

073SAW1

073S5WA

073 3CW1

073SME1

0735PE:

0733FE1

073SSW1

073 SWN!

100CDN1

10C2FE1

10C5FW1

1C0HM1

1011PE1

LOCATION

E sice 677R

S Side 679

E side 687R

S 6 31 Dcor 6

E 691 Deer 6

300'N/NW 631

40'N/NW 691

3 00'N/NW 691

100'W 691

E 691 Doer 6

W 691 Dcor 29

W/SW 639

710-T2 N 710

710-T1 N 710

712-T1 N 712

712-T2 N 712

20'SE 715

20'SE 716

W of CMF

W or CM?

W of CMF

60'E/CM:

60'S/CM?

6CE/CMF

W cf CMF

N/CMF WWTP

30'N cf 1000

E of 1002

25' W 1C0:

NW corner 100

E/S end 1011

CAPACITY

250 Gal

230 Gal

250 Gal

15 Gal

•5 Gal

600 Gal

600 Gal

500 Gal

600 Gal

5 5 Gal

25 Gal

125 Gal

500 K Gal

200 k Gal

.00 X Gal

1000 Gal

1000 Ga!

7,500 Gal

7,500 Gal

CONTENTS STATUS

Keatir.c Oil

Heazinc Oil

Diesel

Diesel

Used Diese!

Diesel

Used Diese! Empty

Diesel

Lub Oil

"■»•^•^STI^

Untreated Wtr

10 0 X Gal Actvtd slucc?

Treated Water

Erine Water

Prccane

Frccar.e

Acid Waste Empty

10,000 Gal Ease Waste

Sloo

1000 Gal Mixed Gas

30, OO'C Gal rcc<

Empty

Empty

30,000 Gal

7,SCO Gal Sclver.t Waste

.5,2 00 Gal Wst water

Empty

2 50 Gal Diesel

500 Gal Frccar.e

5 00 Gal Frccane

25 0 Gal

5CÖ Gal

Heatinc Oil

G-3

! a Cec 1993/ R2 i A30VS GROUND STORAGE T ANK INVENTORY (HRAC PAÄCSL)

1 ID. NO. LOCATION CAPACITY CONTENTS STATUS

i

i 0633FN1 NE side 63 8 250 Gai Frccar.e

i C63SFS1 £W C 632 124 Gal Frccane !__ 063 5DW1 | W/S €3 9 cOC Gal Diesel

; 0623FS1 £Z side 635 | 1C0C Gal c^cc ane

!. 063 5FS2 SS side 635 1000 Gal Frccar.e j

j 063SFS3 SE side 639 1000 Gal Frccar.e

j 064 0FW1 W side 640 1000 Gal Frccane

!| 0641FW1 W side 641 1000 Gal Frccar.e

! 0547DE1 2CS 647 600 Gal Diesel il_ —

1 0647FN1 50'N 647 1000 Gal .r rccane

! 064 7FN2 50'N 647 100C Gal Frccar.e

j 0647?*! 30'S 647 1200 Gal Frccar.e

0647FS2 3C'£ 647 1G0C Gal Frccar.e

064 7E:-:SI S side S547R 25 0 Gal Heating Oil

1 063CFW1 W side 650 5G0 Gal Frccane 1

L _— — [ 06S1FW1 W side 631 3 20 Gal F roc ane

0S51RKW1 W side 651R 25 0 Gal Heating Oil

C6S5HN1 N side 6=5 25 0 Gal Heacinc Oil

0657FE1 E side 657 3 20 Gal Frccane

0C37H:-:EI E side 657R 250 Gal Heating Oil

C65 9FW1 S side 659 5 00 Gal Frccar.e ■ 1

0660FW1 W side 660 3 20 Gal Frccane''

OcclFW'l W side 661 220 Gal Frocane

CcclRHWl W side 661R "■) ^ ^ *■* -, i Heating Oil

0657FE1 S side 667 459 Gal Frooane

066 7RHE1 E side 667R 250 Gal Heating Oil

C5 7CFW1 W side 670 500 Gal Frccane

0 671HS1 SE C 671 4,220 Gal Heating Oil

0571FW1 W side 671 3 20 Gal Frccane

C5 72HS1 S side 672 25 0 Gal Heating Oil

C6 72FS1 S/E End 672 3 CO Gal Fropane

G-4

8 Dec 1993, K2 j j A30VS GROUND STORAGE TANK INVENTORY (BRAC PARCEL) |

ID. NO. LOCATION | CAPACITY CONTENTS STATUS |

1020PE1 E 1020 Gym 1000 Gal ProDane |

1030DS1 30' S 1030 600 Gal Diesel

103ODS2 30' S 1030 600 Gal Diesel

1030GS1 30' S 1030 600 Gal Mccas

1030LS1 100' SW 1030 600 Gal Used Lub Oil

1030PN1 30' NW 1030 | 500 Gal Prcpar.e

103 0PN2 30' NW 1030 500 Gal Prccar.e 1 FSECPW1 W/7SEC Trailer 250 Gal Propane

TTWE1 Test Track 500 Gal j Treated Water |

G-5

APPENDIX H

RADON SURVEY

SDST2-IRS

MEMORANDUM FOR

j u 199

Dir/for Install Operations, 31dg 501 Dir/U.S. Army Health Clinic, Bldg. 400 Chief, Environmental Manag Div, Eldg 113

SUBJECT: Results of Radon Monitoring t. -,-,,

1 . Che rssults i. "ine results from monitoring of Tooele Army Depot biiildiiias for radon are provided for your information. The Army has established the criteria for additional monitoring or mitigation at over 4.0 pico curies per liter of air

Specific locations sampled and results are provided

BLDG ROOM FUNC TIOM 400 15 Health Clinic 400 44 Health Clinic 25 Family Housing 26 Family Housing 27 Family . Hous ing 28 Family Housing 29 Family Housi ng 35 1 30Q 35 *i 300 3 5 La undry 300

152 102 3E0 152 104 BE0 152 I ■■> K BZQ 152 I 0 2 3E0 152 Da y Room BE0 2013 C * Wherry H o'' s "• n cr 2 0 f: A c * Wherry H o u s i n g 2 0 3 A SA Wherry H o u s i n c; 2 093 SA Wherry Ho using 212A SA W h e r r v U ,-• li s i n c

1013 Wherry H ousing 10 23 Wherry Housing 103B Wherry Housing 1043 Wherry -Hous ing 10 53 W herry Housing 1 0 6 3 Wherry H o u s i n cr 10 73 Wherry H o u s i n g 1 0SA Wherry Housing 1093 Wherry Hous ing

RADON LEVEL REMARKS 1 .2 pCi/1 1 . 7 pCi/1 1 . 1 pCi/1 0. 6 oCi/ 1 0 . 7 pCi/1 -- T -

IJO s t M o n i 0.6 pCi/1 0. 4 pCi/1 0 . 3 pCi/i 0 "> ?Ci/l 0 . 2 pCi/1 0 . 1 pCi/1 0 . 2 >>Ci/ 1 0.2 *? C i / 1 i,

0 . 2 pCi/1 ' 1.6 ;:Ci/ 1

'. • ^x ? C i / 1 9 0 d z. ■■•• s a r 1 •"> r, C i / 1 2 . 1 pCi/1 90 diy sir

1 .5 DCi/1 1 .4 pCi/1 1 '3 pCi/1 1 ■? r, r i / 1

1 . 6 rCi/ 1 1 . 3 pCi/1 0.7 pCi/1 1 . 3 pCi/1 0 . 5 p •'- i / 1 2 . 9 pCi/1

tor s

a n n 1 »=>

«-> »-, 1

H-1

10 9C School School School

3 10SA 1000 671 671

1Ö3SA 5 95 594

1250 1005

South Cente: North

Wherry Housing Tooele Valley High Tooele Vallev High Tooele Valley High Fire Station Fire Station Security Desk Sgt Message Center Computer Center Einerg Oper Center Fin & Ace Office Calib Support Center Inv Management Office Ammo Equip Office

2.2 pCi/1 0.2 pCi/1 0.3 pCi/1 0.7 pCi/1 90 day saaple 0.4 pCi/1 0.4 pCi/1 1.2 pCi/1 0.3 pCi/1 0.3 pCi/1 0.7 pCi/1 0.4 pCi/1 0.2 pCi/1 0.5 pCi/1 0.3 pCi/1

3. Point of contact is Gail H. Christiansen, X 2713.

HAROLD K OLIVER Chief, Safety Office

H-2

APPENDIX I

STATE OF UTAH DEPARTMENT OF ENVIRONMENTAL QUALITY COMMENTS AND RESPONSES

State — g^f^fE^l^MH^N^§N^SD ^MEDIATION

Cowwr I 168 North 1950 Wwi 1st Float- DbnBlLNiüon.FhA. S S4ltl4kcC%. üt«h84U0

S^Mttww I (30)) £36-4100 KontP.Gray g £8») 359-8353 Pas

n»« I <8C1) £36-4414 T.D.D- * ER5.C-2S0-94

July 7, 1994

Larry McFarland Environmental Management Divisjon Tooele Army Depot SDSTE-IRE, Building 113 Tooele,Utah 84074-5000

Dear Mr. McFarland:

Enclosed are the Dxvision of Environmental Response ^^™t£Ä comments on the Draft Final Community Eavxrcnmental ^V™*X^™u£ fCEwX) Report and the Draft Final Enhanced Preliminary Assessment Report (ENPA) for Tooele Army Depot-North Area, March 18, 1994.

ERAC planning.

We concur with the CERFA classification to the BRAC parcel, except as noted by PP A HlTweTe concerned that the CERFA report may not adequately identify all SSÄSSÄ'SÄdoc««« review may not have been « *£&«^ Lould have be«. For example, ™f™ «■^£^Ä£E£

ma^rê 2Ä adare^ê^FA^cporf. Ali, the use of a 50 PPm KztllvTscZXo* may result in the designation of a CERFA-q.almed parcel that would not meet CERCLA clean-up requirements.

Another concern is the lack of coordination with the State. With the Sole having Anotner concern is m d ^ facilities, it is disconcerting that we a major re e m the '?™°^^™™^t a^SO) maüy early BRAC documents were were not involved m early.BRAC planning. ^su> J ' , . - , > «r submitted to this office with unrealistic review deadlines (eg., 1 week 2t days^ «g-™ SoSSTiuigests that BRAC issues be identified early and coordinated with the Stote. SryycoofdStion between the State and the Army is key in achieving early rense of closed military property.

Primi>d on («oya** papof

Lany MeFarisnö" Page 2 July 7,1994

If you have any questions, contact Tcrty Hawkins at (801)-536-4100.

Sincerely,

Bred T Johnson, CERCLA Branch Manager Division of Environmental Response and Remediation

BTJ/TH/ser

£nclosum(s)

1-2

FINAL DRAFT ENHANCED PRELIMINARY ASSESSMENT (ENPA) REPORT

FOR THE TOOELE ARMY DEPOT - NORTH AREA

Genera» Comments:

1 Building 659 (SWMUs 33 and IS) was not addressed under CERCLA h«fflsejtito In SlaSiV and CERCLA addresses releases to the environment (oggto-of LSS. SA and the State decided thai "no actW Â^gS^TjS^ b2ed unon fce assumption that the site would be closed under NRC, TSCA, »d ROW SS. Tte Prosed Plan and other documents make t*us clear. Building 00* should be an area requiring environmental evaluation.

2. Several new SWMUs have been added by TEAD-N sin«» «* »*A report was drafted. These new SWMUs should be added to the final ENPA report

Specific Comments:

j P^. io. ^ con-1- rn-fr"h ™ «***°^ This feMraC6 is not dea1, Plcase

revise.

o pag^.l ltttacorrrwT^p»Th.1«t«intmfife Please correct the extra space before

"TCE".

g p^^s^ti«™ 3.11.1. See general comment 1 on the CERFA report

A ?m*l Section 3.14 "No Action" under CERCLA does not neceârüyimply a lack of action under other environmental programs.. See general commit 1 above.

« Pa« 40 SeaiwlMÄÄ^LiSm*** An early document (Installation Assessment If Tooele ArmTDepot Report No. 141, December 1979) indicated that several drums, foI^t^^l^L site. CERCLA documents have been revised to address

this issue. Please revise.

,-n <o c^s«*u^3 There are barracks in the administration area. Are barracks *JXZ £ffi to&ST ifb^s«u«d fo, «**». i*~ P- should be addressed.

1-3

M«h*«l 0. Uta via

DitnncR. Kielson, Ph.O.

State of Utah DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF SOLID AND HAZARDOUS WASTE

2S8 North U6Q W<J«

P.O. B*c I44SS0 Salt, L»te City. ULA 8411-4-42SO

EJto«wDi««r (801) 538-4170 D«nnU R. Downs (SOI) SiS-^'H F»x

April 11, 1994

R. Glenn Roberts Director, Industrial Risk Management Tooele Army Depot Tooele, Utah 84Ö74-5Ö00

RE' Comments on the Enhanced PA for BRAC Closure Tooele Army Depot-North (TEAD-N), EPA ID #UT3213820894

Dear Mr. Roberts:

We have finished a review of the enhanced Preliminary Assessment (PA) for BRAC closure as submitted on March 30, 1994. The compressor condensate drains, the concrete pad area used to dram and flush radiators, the drain field, the impoundment, and the disposal trenches listed m Section.11£2 must be added to the RFI investigation. The Division of Solid and Hazardous Waste (DSHW) comments regarding the PA are presented below:

1. In the first sentence in Section 2.5.2 delete the phrase "Corrective Action Plan (CAP) and replace with the phrase "Post-Closure Permit (PCP)." Delete the first sentence in the second paragraph.

2. Section 3.1.4 should be modified to indicate that parts of the storm water system are being investigated as part of the Phase II RFI for Group A SWMUs.

3. The first sentence in Section 3.3.2 should be modified to read "There have been no investigations of the compressor condensate drains."

4 Section 3,14.3.5 should be modified as necessary to include information about possible Unexploded Ordnance (UXO) in the area near SWMU 45. The UXO was identified during the Phase II RFI for the Group A SWMUs.

5. The document should be revised to include a brief discussion of procedures followed in the eventof a spill. A list of any spill sites that have not been cleaned-up, to the satisfaction of the Executive Secretary, or otherwise addressed should be included as part of the text or as part of Appendix A.

6. A statement should be added to the text of the PA indicating that DSHW has inspected all the satellite accumulation areas and 90-day areas and has not required TEAD-N (see enclosed letter to TEAD-N from UDEQ) to include these units in the RFI investigation.

1-4 pr.nlBd or, locycla paw.'

Within 30 days of your receipt of this letter, wc request TEAD-N co supp yinformanon regardmg die t^ and amount/of wastes disposed into the oil water separator at Building 691 and regard mg the ^S a^d amo'nS of wSte disposed into the condensate compressor-drain,. Any^S£^ca Xnation that is available for either of these units must also be submmed In•**££** ^ TEM5-N to supply information on the status of the following tanks as listed in Appendices F and G. öS» Ä91DN2,07iariSNl, 073SAW1,0738BWA, 0733CW1, and0738SWl. As urtcafed 2t Condition VM.1 of tie post-closure permit, TEAD-N must notify the Executive Secretary of m

newly identified SWMUs within 30 days of discovery of the new unit.

If you have any questions, please contact David Larsen or Bradley Maulding of my staff at 538-6170.

Sincere]^-1 ""s _^ ^"i

Scott T. Anderson Manager, Hazardous Waste Branch Utah Division of Solid and Hazardous Waste

STA/DCUdcl

c: Myron Bateman, R.S., M.P.H., Health Officer/Director, Tooele County Health Dept. Paul Feldman, US Army Corps of Engineers, Sacramento Mary Ellen Maly, USAEC

1-5

Michael 0. Laavitt

Dianne R. Nielson. Ph.D. SAMUilve Uuec'.or

Kent !'• Gray fti/UCr.V

* DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENVIRONMENTAL RESPONSE AND REMEDIATION

16S North 1950 W«i i'.O. Box 144S40 SJt IJJCC City. Utah X41 H-4X40 (SO!) £36-4100 (501)359-8853 Fax (SO!) 536-4414 T.D.D,

ERRC-415-94

September 20, 1994

Mr. Ken Quirk U.S. Army Environmental Center (USAEC) APG-EA, MD 21010-5401

Dear Mr. Quirk:

The draft response to our comments on the Draft Final Enhanced Preliminary Assessment (ENPA) and the Draft Final Community Environmental Response Facilitation Act (CERFA) Report appears to adequately address the comments with the exception of specific comments 4 and 6 of the ENPA. Also, a potential problem was identified concerning parcel 25P of the CERFA Report.

The response to Comment #4 should include a statement in the text that other environmental authorities, besides CERCLA, may be involved in the closure of building 659. The Environmental Protection Agency and the State decided that "no action" was appropriate under CERCLA based upon the assumption that the building would be closed under NRC, TSCA, and RCRA regulations. Samples have not been taken in building 659 and a risk assessment has not been conducted. On page 48, Section 3.14.1.3, the last sentence indicates that a risk assessment was conducted for Solid Waste Management Unit (SWMU) 33. This is not correct. Please correct the sentence.

The response to Comment #6 indicates that the barracks are not intended for residential habitation. It is our understanding that several federal organizations and the Soviet On-site Inspection Agency have expressed interest in use of these buildings and that the intended use by these organizations has not been defined. Please identify the intended use of these buildings prior to deciding that lead-based paint is not an area requiring environmental evaluation.

Be aware that SWMU 35, which is adjacent to parcel 25P, is being investigated for pesticides. Ten mg/kg of chlordane was detected in a soil sample from a ditch down-gradient of the horse stables. No samples were taken up-gradient of this sample location during the Phase I investigation. There is a potential that pesticides may be a concern in parcel 25P. Please evaluate potential, pesticide contamination within parcel 25P.

Pi'itfCiO on KAV'.Wi \)Z0C< 1-6

Mr. Ken Quirk September 20, 1994 Page 2

If you have any questions, contact Terry Hawkins at (801)-536-4100.

Sincerely, Sincerely, •>

Brad T Johnson, CERCLA Branch Manager Division of Environmental Response and Remediation

BTXTH/ser

cc: Floyd Nichols, U.S. EPA, Region Vffl Larry McFarland, TEAD-N Mary Ellen Maly, USAEC Project Manager Myron Bateman, R.S., M.P.A., Director, Tooele County Health Department

1-7

Response to Comments on Draft Final Enhanced Preliminary Assessment (ENPA)

Commentor: Scott T. Anderson Manager, Hazardous Waste Branch Utah Division of Solid and Hazardous Waste April 11,1994

Comment 1:

Response:

Comment 2:

Response:

Comment 3:

Response:

Comment 4:

Response:

Comment 5:

Response:

Comment 6:

Response:

In the first sentence in Section 2.5.2 delete the phrase "Corrective Action Plan (CAP)" and replace with the phrase "Post-Closure Permit (PCP)." Delete the first sentence in the second paragraph.

The text has been modified as requested.

Section 3.1.4 should be modified to indicate that parts of the storm water system are being investigated as part of the Phase II RFI for Group A SWMUs.


The first sentence in Section 3.3.2 should be modified to read "There have been no investigations of the compressor condensate drains."


Section 3.14.3.5 should be modified as necessary to include information about possible Unexploded Ordnance (UXO) in the area near SWMU 45. The UXO was identified during the Phase II RFI for the Group A SWMUs.

Since SWMU 45 is not located within or adjacent to the BRAC parcel the text has not been modified. No documentation was found that supports a UXO concern within the BRAC parcel.

The document should be revised to include a brief discussion of procedures followed in the event of a spill. A list of any spill sites that have not been cleaned-up, to the satisfaction of the Executive Secretary, or otherwise addressed should be included as part of the text or as part of Appendix A.

The document indicates that spills should be handled in accordance with the installation's spill response plan; however, details of that plan have not been included in the ENPA since spill response procedures, by Army guidance, are not part of the ENPA. Section 3.19.2.6, Spills, has been added to the text. The section states "Lastly, spills that have occurred within the BRAC parcel are documented in the spill report in Appendix A. The installation has a spill contingency plan that is activated when an uncontrolled release of hazardous material occurs. During the ENPA site visits and investigation of spill records, no evidence of improperly handled spills was encountered."

A statement should be added to the text of the PA indicating that DSHW has inspected all the satellite accumulation areas and 90-day areas and has not required TEAD-N (see enclosed letter to TEAD-N from UDEQ) to include these units in the RFI investigation.


AEC_TEP\D01\FINALENP\Comment.ENP Rev. 09/28/94; 11:47am

I-8

•

Commentor: Brad T. Johnson CERCLA Branch Manager Utah Division of Environmental Response and Remediation July 7,1994

General Comments

Comment 1: Building 659 (SWMUs 33 and 18) was not addressed under CERCLA because it is an active facility and CERCLA addresses releases to the environment (outside of buildings). EPA and the State decided that "no action" was appropriate under CERCLA based upon the assumption that the site would be closed under the NRC, TSCA, and RCRA regulations. The Proposed Plan and other documents make this clear. Building 659 should be an area requiring environmental evaluation.

Response: Building 659 and the administrative files were inspected and found to be well- maintained and in compliance with TSCA and RCRA regulations. As stated in the comment, it is expected that the site will be closed under the NRC, TSCA, and RCRA regulations. Thus, a site investigation (under the RFI) of this building is not warranted. However, the soils outside Building 659 were identified as an AREE as requested by Henry Schroeder of EPA Region VIII during a January 1994 Project Managers meeting. At this meeting, the EPA expressed concern that releases of PCBs to the environment may have occurred outside of Building 659 because of transformer storage within the structure.

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Comment 2: Several new SWMUs have been added by TEAD-N since the ENPA report was drafted. These new SWMUs should be added to the final ENPA report.

Response: The new SWMUs, 50-55, have been incorporated in the final ENPA report. The Radiator Repair Facility (Building 609) has been included as AREE 1c, since it is now being addressed as part of SWMU 49.

Specific Comments

Comment 1: Paqe 19, 3rd complete paraqraph. 3rd sentence. This sentence is not clear. Please revise.

Response: The text has been clarified as requested.

Comment 2: Paqe 21, 1 st incomplete paraqraph, last sentence. Please correct the extra space before "TCE."

Response: The text has been modified as requested.

Comment 3: Paqe 45. Section 3.11.1. See qeneral comment 1 on the CERFA report (i.e., Several locations in the CERFA report refer to a 50 ppm PCB level for Federal and State regulatory thresholds. Please be aware that CERCLA may require risk based clean up levels for PCBs. EPA CERCLA guidance (EPA/540/G- 90/007) recommends preliminary remediation goals of 1 ppm (residential) and 10-25 ppm (industrial) for PCBs. Therefore evaluation of sites based on a 50 ppm PCB level may result in the designation of a CERFA-qualified parcel that

• would not meet CERCLA clean-up standards. Please evaluate PCB sites appropriately.)

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Rev. 09/28/94; 11:47am I-9

Response:

Comment 4:

Response:

Comment 5:

Response:

Comment 6:

Response:

The comment refers to the discussion of PCB-containing transformers. Risk- based clean-up levels are not pertinent to the referenced discussion; however, PCB releases will be properly addressed in accordance with the applicable regulations.

Page 47. Section 3.14. "No Action" under CERCLA does not necessarily imply a lack of action under other environmental programs. See general comment 1 above.

The text has been modified to clearly indicate that these areas discussed in Section 3.14 (Section 3.20 in the final version), if they had not been previously investigated, may have been identified as AREEs; however, previous investigation under CERCLA and RCRA indicated that no further action was necessary, and thus, evidence does not warrant further environmental evaluation.

Page 49, Section 3.14.1.4. 3rd sentence. An early document (Installation Assessment of Tooele Army Depot, Report No. 141, December 1979) indicated that several drums, not one, have been stored at this site. CERCLA document have been revised to address this issue. Please revise.


Page 52, Section 3.14.3.3. There are barracks in the administration area. Are barracks considered residential habitation? If barracks are used for residents, lead-based paint should be addressed.

The Army's policy guidance on lead-based paint in Army properties affected by BRAC applies to "target housing" which is defined as "any Army housing constructed before 1978 in which any child less than 6 years of age resides or is expected to reside." Although the barracks are not currently considered "target housing," re-use of the barracks are dependent on the Community Re- Use Plan which is scheduled to be finalized by the end of the year. To be conservative, Administration Area buildings that could potentially be used as target housing have been addressed as an AREE.

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Commentor: Brad T. Johnson CERCLA Branch Manager Utah Division of Environmental Response and Remediation September 20,1994

General Comments

Comment 1: The response to Comment #4 should include a statement in the text that other environmental authorities, besides CERCLA, may be involved in the closure of building 659. The Environmental Protection Agency and the State decided "no action" was appropriate under CERCLA based upon the assumption that the building would be closed under NRC, TSCA, and RCRA regulations. On page 48, Section 3.14.1.3, the last sentence indicates that a risk assessment was conducted for Solid Waste Management Unit (SWMU) 33. This is not correct. Please correct the sentence.

Response:

Comment 2:

Response:

Comment 3:

Response:


The response to Comment #6 indicates that the barracks are not intended for residential habitation. It is our understanding that several federal organizations and the Soviet On-site Inspection Agency have expressed interest in use of these buildings and that the intended use by these organizations has not been defined. Please identify the intended use of these building prior to deciding lead-based paint is not an area requiring environmental evaluation.

The Army's policy guidance on lead-based paint in Army properties affected by BRAC applies to "target housing" which is defined as "any Army housing constructed before 1978 in which any child less than 6 years of age resides or is expected to reside." Although the barracks are not currently considered "target housing," re-use of the barracks are dependent on the Community Re- Use Plan which is scheduled to be finalized by the end of the year. To be conservative, Administration Area buildings that could potentially be used as target housing have been addressed as an AREE.

Be aware that SWMU 35, which is adjacent to parcel 25P, is being investigated for pesticides. Ten mg/kg of chlordane was detected in a soil sample from a ditch down-gradient of the horse stables. No samples were taken up-gradient of this sample location during the Phase I investigation. There is a potential that pesticides may be a concern in parcel 25 P. Please evaluate potential pesticide contamination within parcel 25P.

Preliminary Phase II sample results were evaluated. Pesticides were detected at concentrations less than 1 mg/kg within parcel 25P. Such concentrations may be indicative of normal pesticide application, and therefore this area has not been designated as an AREE.

AEC_TEP\D01\FINALENP\Comment.ENP Rev. 09/28/94; 2:41 pm 1-11

JAN 04 '95 04:16PM BASE CLOSURE DIV. P.2/4

state 01 Utah DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENVIRONMENTAL RESPONSE AND REMEDIATION

I6S North 1950 West P.O. Box 144840

DiAftrt« R. Nieison, Ph.D. 4 Silt Like City. Utah 84114-4840 £»««(«« Du«« (801)536-4100

Kent P. Gny (801) 359-8853 F« Dir»« (80l) 5364414 T<DiD.

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December 9, 1994

Mr. Larry McFariand Environmental Management Division Tooele Army Depot. SESTE-IRE, Building 113 Tooeie, Utah 84057-5000

Dear Mr. McFarland:

The Division of Environmental Response and Remediation (DERR) has three comments on the Final Community Environmental Response Facilitation Act (CERFA) Report and the Final Enhanced Preliminary Assessment (ENPA) Report for Tooele Army Depot-North Area, October 5, 1994.

ENPA - Page 50, Section 3.11.1, last sentence. Though the last sentence may be correct, it would be better to state that there were no leaking transformers identified in the BRAC parcel as stated in the CERFA report on page 57. Section 4.3.4, second paragraph, second sentence. (A leaking transformer regardless of the PCB concentration may be of concern under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)).

CERFA - Page 69. Table 5-1. Parcel 2D-PR(P)HR(P). This parcel has been identified as CERFA disqualified based upon aerial photographic analysis; however, no additional studies/remediation efforts are proposed. Please evaluate the need for additional study at this site.

CERFA - Page 72, Table 5-1, Parcel 6D-PR(P)HR(P). This parcel has been identified as CERFA disqualified based upon aerial photographic analysis; however, no additional studies/remediation efforts are proposed. Please evaluate the need for additional study at this site.

If you have any questions, contact Terry Hawkins at (801)-536-4l00.

Sincerely,

Brad T Johnson, CERCLA Branch Manager Division of Environmental Response and Remediation

BTJ/TH/scr

cc: Floyd Nichols, U.S. EPA Region vm Myron Bateman, R.S., M.P.A., Tooele County Health Department

1-12 Printed on recycioö paoer

Response to Comments on Final Enhanced Preliminary Assessment (ENPA) Report

Commentor: Brad T. Johnson CERCLA Branch Manager Utah Division of Environmental Response and Remediation December 9, 1994

Comment 1: ENPA - Page 50, Section 3.11.1, last sentence. Though the last sentence may be correct, it would be better to state that there were no leaking transformers identified in the BRAC parcel as stated in the CERFA report on page 57, Section 4.3.4, second paragraph, second sentence. (A leaking transformer regardless of the PCB concentration may be of concern under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)).

Response: The Final ENPA Report text has been modified as requested in an addendum submitted on January 30, 1995.

Comment 2: CERFA - Page 69, Table 5-1, Parcel 2D-PR(P)HR(P). This parcel has been identified as CERFA disqualified based upon aerial photographic analysis; however, no additional studies/remediation efforts are proposed. Please evaluate the need for additional study at this site.

Response: CERFA Table 5-1 has been modified as requested in an addendum sumitted on January 30, 1995.

Comment 3: CERFA - Page 72, Table 5-1, Parcel 6D-PR(P)HR(P). This parcel has been identified as CERFA disqualified based upon aerial photographic analysis; however, no additional studies/remediation efforts are proposed. Please evaluate the need for additional study

at this site.

Response: No additional studies or remediation efforts are proposed associated with Parcel 6D- PR(P)HR(P), as the results of ground truthing conducted by the TEAD-N Environmental Management Division personnel did not indicate the need for additional investigation of this area. This information and the resulting conclusion were presented to the Utah Department of Environmental Quality in a correspondence from the TEAD-N Environmental Management Division dated May 10, 1994.

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