Usa Vint Hill Farms Station Epa Id: Va8210020931 Ou 05 Warrenton, Va 07/01/1999
Total Page:16
File Type:pdf, Size:1020Kb
EPA/ROD/R03-99/015 1999 EPA Superfund Record of Decision: USA VINT HILL FARMS STATION EPA ID: VA8210020931 OU 05 WARRENTON, VA 07/01/1999 TABLE OF CONTENTS Section Page 1.0 INTRODUCTION .............................................................. 1 2.0 SITE BACKGROUND ........................................................... 1 3.0 SITE CHARACTERISTICS ....................................................... 3 3.1 Site Topography ........................................................... 3 3.2 Adjacent Land Use ......................................................... 3 3.3 Surface Water Hydrology .................................................... 3 3.4 Geology/Hydrogeology ...................................................... 5 4.0 SITE HISTORY AND INVESTIGATION FINDINGS .................................... 5 4.1 AREE 3 – Warehouse ...................................................... 5 4.2 AREE 5 – EPIC Building ..................................................... 6 4.3 AREE 7 – Electrical Equipment Facility Pretreatment Tank .......................... 6 4.4 AREE 10 – Former Photographic Wastewater Lagoon .............................. 6 4.5 AREE 16-2 – Possible Firefighter Training Pit .................................... 7 4.6 AREE 17 – Dump #3 ....................................................... 7 4.7 AREE 18 – Grease Pit ...................................................... 8 4.8 AREE 20 – Incinerator Septic Tank and Leach Field ............................... 8 4.9 AREE 24 – Transformer Storage Area .......................................... 8 4.10 AREE 25 – Sugar Tree ..................................................... 8 4.11 AREE 26 – Outdoor Wash Racks ............................................. 9 4.12 AREE 29-1 – Salvage Yard .................................................. 9 4.13 AREE 29-2 – Possible Sludge Disposal Area ..................................... 9 4.14 AREE 29-3 – Possible Disposal Area ........................................... 9 4.15 AREE 30 – Motor Pool .................................................... 10 4.16 AREE 33 – Household Debris Pile ............................................ 10 4.17 Site-Wide Groundwater .................................................... 10 4.18 South Run at AREEs 1 and 2 ............................................... 11 4.19 Other Site Drainages ...................................................... 11 5.0 SUMMARY OF SITE RISKS .................................................... 12 5.1 AREE 3 - Warehouse ....................................................... 13 5.2 AREE 5 - EPIC Building ..................................................... 14 5.3 AREE 7 – Electrical Equipment Facility Pretreatment Tank .......................... 14 5.4 AREE 10 – Former Photographic Wastewater Lagoon ............................. 14 5.5 AREE 16-2 – Possible Firefighter Training Pit .................................... 14 5.6 AREE 17 – Dump #3 ....................................................... 15 5.7 AREE 18 – Grease Pit ...................................................... 15 5.8 AREE 20 – Incinerator Septic Tank and Leach Field ............................... 15 5.9 AREE 24 – Transformer Storage Area .......................................... 15 5.10 AREE 25 – Sugar Tree .................................................... 15 5.11 AREE 26 – Outdoor Wash Racks ............................................ 15 5.12 AREE 29-1 – Salvage Yard ................................................. 16 5.13 AREE 29-2 – Possible Sludge Disposal Area .................................... 16 5.14 AREE 29-3 – Possible Disposal Area .......................................... 16 5.15 AREE 30 – Motor Pool .................................................... 16 i TABLE OF CONTENTS (Contintied) Section Page 5.16 AREE 33 -Household Debris Pile ............................................. 16 5.17 Site-Wide Groundwater .................................................... 17 5.18 South Run at AREEs 1 and 2 ............................................... 17 5.19 Other Site Drainages ...................................................... 17 6.0 SELECTED ALTERNATIVE .................................................... 18 7.0 HIGHLIGHTS OF COMMUNITY PARTICIPATION ................................... 18 8.0 RESPONSIVENESS SUMMARY ................................................. 18 8.1 Selected Newspaper Notices ................................................. 19 8.2 Comments Raised During the Public Meeting on April 15,1999 ....................... 19 8.3 Public Meeting Attendance Roster ............................................. 20 8.4 Active Restoration Advisory Board Members ..................................... 20 8.5 Written Comments Received During the Public Comment Period ..................... 20 9.0 REFERENCES .............................................................. 21 ii LIST OF FIGURES Figure Page 1 General Location of VHFS .............................................. 2 2 General Locations of AREEs at .......................................... 4 LIST OF ATTACHMENTS Attachment 1 Response to USEPA Comments on the Final Phase I Reuse Area RI Report Attachment 2 Response to USEPA Comments on the Final Phase II Reuse Area RI Report Attachment 3 Proposed Plan Attachment 4 Public Notice Attachment 5 PublicMeeting Roster Attachment 6 Written Comments From Regulators and U.S. Army Responses iii ABBREVIATIONS AND ACRONYMS AAFES Army, Air Force Exchange Service AREE Area Requiring Environmental Evaluation AST aboveground storage tank AWQC Ambient Water Quality Criteria bgs below ground surface BRA Baseline Risk Assessment BRAC Base Realignment and Closure CECOM Communications-Electronics Command CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CERFA Community Environmental Response Facilitation Act DD Decision Document EEQ environmental effects quotient ENPA Enhanced Preliminary Assessment EPIC Environmental Photographic Interpretation Center ERA Ecological Risk Assessment ER-L effects range-low ft feet HHRA Human Health Risk Assessment HI Hazard Index HQ Hazard Quotient ICF KE ICF Kaiser Engineers, Inc. IMMC Intelligence Materiel Management Center MCL maximum contaminant level MSL mean sea level NCP National Oil and Hazardous Substances Pollution Contingency Plan PAH polynuclear aromatic hydrocarbon PCB polychlorinated biphenyl ppb parts per billion ppm parts per million RBC risk-based concentration RCRA Resource Conservation and Recovery Act RI Remedial Investigation SAIC Science Applications International Corporation SARA Superfund Amendments and Reauthorization Act SDWA Safe Drinking Water Act SI Site Inspection SOV soil organic vapor SRI Supplemental Remedial Investigation STP Sewage Treatment Plant TPH total petroleum hydrocarbon TRV toxicity reference value USACE U.S. Army Corps of Engineers USAEC U.S. Army Environmental Center USEPA U.S. Environmental Protection Agency UST underground storage tank VDEQ Virginia Department of Environmental Quality VHFS Vint Hill Farms Station VOC volatile organic compound WSRT western South Run tributary iv DECLARATION FOR THE DECISION DOCUMENT REMEDIAL ALTERNATIVE SELECTION Site Name and Location Areas Requiring Environmental Evaluation (AREEs) 3, 5, 7,10, 16-2, 17, 18, 20, 24, 25, 26, 29-1, 29-2, 29-3, 30, and 33; Site-wide Groundwater, South Run at AREEs 1 and 2; and Other Site Drainages Vint Hill Farms Station Warrenton, Virginia Statement of Basis and Purpose This Decision Document (DD) presents a determination that no action is necessary to protect human health and the environment for soil at AREEs 3, 5, 7, 10, 16-2, 17,18, 20, 24, 25, 26, 29-1, 29-2, 29-3, 30, and 33; site-wide groundwater; South Run at AREEs 1 and 2; and other site drainages at Vint Hill Farms Station (VHFS), Warrenton, Virginia. This determination was developed in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), as amended by the Superfund Amendments and Reauthorization Act (SARA) of 1986 and the National Oil and Hazardous Substances Pollution Contingency Plan (NCP), 40 C.F.R. Part 300. This document was prepared as a joint effort between the U.S. Army, the Virginia Department of Environmental Quality (VDEQ), and the U.S. Environmental Protection Agency (USEPA). The no action decision is supported by documents contained in the Information Repository. Description of the Selected Remedy No action is the selected remedy for AREEs 3, 5, 7,10, 16-2, 17, 18, 20, 24, 25, 26, 29-1, 29-2, 29-3, 30, and 33; site-wide groundwater; South Run at AREEs 1 and 2; and other site drainages. The Baseline Risk Assessment (BRA), conducted as part of the investigation activities, supports the no action decision. Declaration v DECISION SUMMARY 1.0 INTRODUCTION The no action decision is based on the Phase I Reuse Area Remedial Investigation (RI) Report (USAEC, 1998) and the Phase II Reuse Area RI Report (USACE, 1999) which include Baseline Risk Assessments (BRAs) documenting the risks from contamination in the soil at Areas Requiring Environmental Evaluation (AREEs) 3, 5, 7, 10, 16-2, 17, 18, 20, 24, 25, 26, 29-1, 29-2, 29-3, 30, and 33; site-wide groundwater; South Run at AREEs 1 and 2; and other site drainages. In the BRAs, it was determined that the soils at AREEs 3, 5, 7, 10, 16-2, 17, 18, 20, 24, 25, 26, 29-1, 29-2, 29-3, 30, and 33 do not pose unacceptable risks to human health and the environment. Therefore, the soils at these AREEs require no action to be protective of human health