Record of Decision (Rods)
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Other Edgewood Areas Study Area Record of Decision Remedial Action at-the Western Shore Investigation Area (EAOEI2) Final, August 2011 u.s. Army Garrison Aberdeen Proving Ground, Maryland DISTRIBUTION RESTRICfION STATEMENT APPROVED FOR PUBLIC RELEASE DISTRffiUTION IS UNLIMITED #l1067S-A-7 FINAL RECORD OF DECISION REMEDIAL ACTION AT THE WESTERN SHORE INVESTIGATION AREA (EAOEI2) OTHER EDGEWOOD AREAS STUDY AREA ABERDEEN PROVING GROUND, MARYLAND SUBMITTED BY: ENVIRONMENTAL DIVISION DIRECTORATE OF PUBLIC WORKS U.S. ARMY GARRISON ABERDEEN PROVING GROUND EDGEWOOD, MARYLAND 21010 August 2011 DISlRIBUTION RESTRICTION STATEMENT APPROVED FOR PUBLIC RELEASE: DISTRIBTION IS UNLIMITED: #1067S-A-7 This page was' intentionally left blank. Record ofDecision Final OEA Western Shore I1fVestigation Area August 2011 Aberdeen Proving Ground, Maryland Pagei TABLE OF CONTENTS PART 1: DECLARATION.......••.••.....•.....•.................................................•.••.••••.••..••..••.....••••..••.•.•....••••....1 1 SITE NAME AND LOCATION 1 2 STATEMENT OF BASIS AND PURPOSE 1 3 ASSESSMENT OF THE SITE ..............•..•........•.•..•...•..••.••...•..........•..•••..••.••...•..............•............••.•.•2 4 DESCRIPTION OF THE SELECTED REMEDY 2 5 STATUTORY DETERMINATIONS.•••.••.......•....•.....••....•..•.....•....•..•.••••••.•....•.••••...•..•.•••.••.••.•.••.••••••3 6 DATA CERTIFICATION CIlECKLIST 4 7 AUTHORIZING SIGNATURES.....•.•.•.....................•.........•.•...............•..•••.•••.•.•.••••.•...•.•.•.•....••••.•...•4 PART 2: DECISION SUMMARY 5 1 SITE NAME, LOCATION AND DESCRIPTION 5 2 SITE HISTORY AND ENFORCEMENT ACTIVITIES 5 3 PUBLIC/COMMUNITY INVOLVEMENT..•..•••..•••••••..•••.•.•.••••••••.••.••••.•.•.•••••.•.•••.••.••••..•••.•.•......•• 11 4 SCOPE AND ROLE OF RESPONSE ACTION 12 5 SITE CHARACTERISTICS •.•.•.••....••••••...•.•..••.•••.•••••..••••••..•••.••.•••..•.•.••..•••.•.•.•••..••.•.•.••••••.•.••.....•...• 12 5.1 CONCEPTUAL SITE MODEL FOR WSIA 14 6 CURRENT AND POTENTIAL FUTURE LAND AND RESOURCE USES 23 7 SUMMARY OF SITE RISKS •.•..•...•.•.•.••••.•••.•••.•..•.••.•.••.••••..•••.••..•.•......•...•.••.....•.•..........•.•.•••••.......•24 7.1 HUMAN HEALTH 24 7.2 ENVIRONMENT 30 8 REMEDIAL ACTION OBJECTIVES•.............•.•........•...•.....•.•..•.•..•..•.••.•..•.•.•.•••••...•••...•..•...•••...••..31 9 DESCRIPTION OF ALTERNATIVES ..•.....•....•.....•.......................•..........•................•.••....•.•.••..•..•31 9.1 ALlERNATIVE 1: No ACTION 31 9.2 ALlERNATIVE2: LUCs 32 10 SUMMARY OF COMPARATIVE ANALYSIS OF ALTERNATIVES 32 10.1 OVERALL PROTECTlON OF HUMAN HEALTH AND THE ENVIRONMENT 32 10.2 COMPLIANCE WITH APPLICABLE OR RELEVANT AND APPROPRIAlE REQUIREMENTS 32 10.3 LoNG-TERM EFFECTIVENESS AND PERMANENCE 34 lOA REDUCTION OF TOXICITY, MOBILITY, OR VOLUME THROUGH TREATMENT 34 10.5 SHORT-TERM EFFECTIVENESS 34 10.6 IMPLEMENTABILITY 34 10.7 COST 34 10.8 STAlE ACCEPTANCE 34 10.9 COMMUNITY ACCEPTANCE 34 Record ofDecision Final OEA Western Shore Investigation Area August 2011 Aberdeen Proving Ground, Maryland Page ii 11 PRINCIPAL TllREAT WASTES 34 12 SELECTED REMEDY.•••••••••.•.......•..•...•.•.•...................•....••••.•••••..••..•.••......•..•.........•.•••....••.•••.........35 12.1 DESCRIPTION OF lHE SELECTED REMEDy .35 12.2 LUC REMEDIAL DESIGN ••••••.••••••••••••••••••••....••.......•.••••••••••••••••••••••••••••••.••...••.•.•••••.•.••••••••••••••••••35 12.3 SUMMARY OFlHE RATIONALE FOR nmSELECfEDREMEoy 39 12.4 SUMMARy OF EsTIMATED REMEDY COSTS 40 12.5 EXPEcrED OUTCOMES OF SELEcrED REMEDY 40 12.6 PERFORMANCE STANDARDS FOR lHE SELECTED REMEDY 40 13 STATUTORY DETERMINATIONS 40 13.1 PROTECTION OF HUMAN HEALTII AND THE ENVIRONMENT .40 13.2 COMPLIANCE WITH APPLICABLE OR RELEVANT AND APPROPRIATE REQUIREMENTS .42 13.3 COsT-EFFECTIVENESS : 42 13.4 UTILIZATION OF PERMANENT SOLUTIONS AND ALTERNATIVE TREATMENT TECHNOLOGIES TO lHE MAxMUM EXTENT PRACTICABLE .42 13.5 PREFERENCE FOR TREATMENT AS A PRINCIPAL ELEMENT .42 13.6 CERCLA 121(C) FIVE-YEAR REVIEW REQUIREMENT 42 14 DOCUMENTATION OF SIGNIFICANT CHANGES 42 PART'3: RESPONSIVENESS SUMMARY 43 1 OVERVIEW 43 2 BACKGROUND ON COMMUNITY INVOLVEMENT 43 3 SUMMARY OF COMMENTS RECEIVED DURING THE PUBLIC COMMENT PERIOD AND AGENCY RESPONSES 45 PART 4: REFERENCES 48 RecordofDecision Final OEA Western Shore Investigation Area August 2011 Aberdeen Proving Ground, Maryland Page iii LIST OF FIGURES FIGURE 1. LOCATION OF OTHER EDGEWOOD AREAS IN ABERDEEN PROVING GROUND 6 FIGURE 2. LOCATION OF WESTERN SHORE INVESTIGATION AREA WITHIN OTHER EDGEWOOD AREAS 7 FIGURE 3. SITE FEATURES WITHIN THE WESTERN SHORE INVESTIGATION AREA 9 FIGURE 4. WESTERN SHORE INVESTIGATION AREA SURFACE SOn.. SAMPLING LOCATIONS 17 FIGURE 5. WESTERN SHORE INVESTIGATION AREA SURFACE WATER AND SEDIMENT SAMPLING LOCATIONS .18 FIGURE 6. EXTENT OF PROHffiITION ON REsIDENTIAL LAND USE IN WESTERN SHORE INVESTIGATION AREA 37 FIGURE 7. SAMPLE NEWSPAPER ADVERTISEMENT 44 LIST OF TABLES TABLE 1. SUMMARY OF RISKS ASSOCIATED WITH ExpOSURES IN THE WSIA UNDER CURRENT AND FUIURE LAND USE CONDITIONS 26 TABLE 2. SUMMARY OF RIsKS ASSOCIATED WITH EXPoSURES IN THE WSIA UNDER FUTURE LAND USE CONDITIONS 27 TABLE 3. REMEDIAL ALTERNATIVE EVALUATION CRITERIA 33 TABLE 4. DETAILED COSTS FOR THE SELECTED REMEDY 41 RecordofDecision Final OBA Western Shore I11Vestigation Area August 2011 Aberdeen Proving Ground, Maryland Page tv ACRONYMS AND ABBREVIATIONS AEDB-R Anny Environmental Database - Restoration AOC area ofconcern APG Aberdeen Proving Ground ARAR applicable or relevant and appropriate requirement bgs below ground surface BRAC Base Realignment and Closure BTAG Biological Technical Assistance Group BTEX benzene, toluene, ethylbenzene, and xylene CI2-SD Cluster 12 sediment CI2-SS Cluster 12 surface soil CI2-SW Cluster 12 surface water CERCLA Comprehensive Environmental Response, Compensation and Liability Act cac chemical of concern COPC chemical ofpotential concern COMAR Code ofMaryland Regulations CSM Conceptual Site Model 4,4'-DDD 4,4'-dichlorodiphenyldichloroethane 4,4'-DDE 4,4'-dichlorodiphenyldichloroethene 4,4'-DDT 4,4'-dichlorodiphenyltrichloroethane DDTr 4,4'-DDT + 4,4'-DDE + 4,4'-DDD DPT direct push technology EA EA Engineering, Science, and Technology, Inc. FFA Federal Facility Agreement FFS Focused Feasibility Study GIS Geographic Information System GP General Physics Corporation llliRA Human Health Risk Assessment HI hazard index HQ hazard quotient IRP Installation Restoration Program LECR lifetime excess cancer risk RecordofDecision Final OEA Western Shore llTVestigation Area August 2011 Aberdeen Proving Ground, Mary/and Page v LUC land use control MCL Maximum Contaminant Level MDE Maryland Department ofthe Environment msl mean sea level Ilglkg micrograms per kilogram IlgIL micrograms per Liter mglkg milligrams per kilogram NCP National Oil and Hazardous Substances Pollution Contingency Plan NPL National Priorities List OEA Other Edgewood Areas OEA-GF Other Edgewood Areas G-Field O&M operation & maintenance OSWER Office of Solid Waste and Emergency Response PAH polycyclic aromatic hydrocarbon PCB polychlorinated biphenyl RAB Restoration Advisory Board RAO remedial action objective RCRA Resource Conservation and Recovery Act RD remedial design RFA RCRA Facility Assessment RI remedial investigation ROD record ofdecision RSL Regional Screening Level SARA Superfimd Amendments and Reauthorization Act SVOC semivolatile organic compound SWMU Solid Waste Management Unit TRV toxicity reference value USAEC U.S. Anny Environmental Command (formerly the U.S. Army Environmental Center) USAEHA U.S. Anny Environmental Hygiene Agency (now the U.S. Army Center for Health Promotion and Preventative Medicine [USACHPPMD USATHAMA U.S. Army Toxic and Hazardous Materials Agency (now the U.S. Army Environmental Command) Record ofDecision Final OKA Western Shore Investigation Area August 2011 Aberdeen Proving Ground, Maryland Page vi USEPA u.s. Environmental Protection Agency UST underground storage tank UXO unexploded ordnance VOC volatile organic compound WHF H-Field groundwater monitoring well designation WSIA Western Shore Investigation Area WS-MD-l composite soil sample designation WS-SD Western Shore sediment WS-SO-l grab soil sample designation WS-SS Western Shore surface soil WS-SW Western Shore surface water RecordofDecision Final OEA Western Shore Investigation Area August 2011 Aberdeen Proving Ground, Maryland Pagel RECORD OF DECISION REMEDIAL ACTION AT THE WESTERN SHORE INVESTIGATION AREA (EAOE12) OTHER EDGEWOOD AREAS STUDY AREA ABERDEEN PROVING GROUND, MARYLAND August 2011 PART 1: DECLARATION 1 SITE NAME AND LOCATION The Western Shore Investigation Area (WSIA), located within the Edgewood Area of Aberdeen Proving Ground (APG), Maryland has been designated for Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) response action to address the impact of historical waste management practices. The WSIA lies in the western portion of the Other Edgewood Areas (OEA) Study Area, along the Gunpowder River. Included in the WSIA are open space/undeveloped areas, the western portions of military test ranges H-Field and I-Field, the northwestern portion of J-Field, and six other sites identified for investigation, and listed below. U.S. Army CERCLA response actions are tracked in the Army Environmental Database-Restoration (AEDB-R). The six WSIA sites, corresponding to AEDB-R Number EAOE12, are: AEDB-R No. EAOE12 Sites: ~ H-Field Pre-World War II (WWII) Artillery Target Area 1 ~ H-Field Building E1464 Septic Tank Site ~ H-Field Building E1467 Storage