Moffett Site 1, 22, 26, and 28 Five Year Review
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Five Year Review for Installation Restoration Sites 1, 22, 26 and 28, Former Naval Air Station Moffett Field: Presentation to the Moffett Restoration Advisory Board Meeting, February 12, 2015, by Wilson Doctor, Navy Project Manager
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Moffett Site 1, 22, 26, and 28 Five Year Review
- 1. ACTIVITY NAME Five Year Review for Installation Restoration Sites 1, 22, 26 and 28 Former Naval Air Station Moffett Field Restoration Advisory Board Meeting, February 12, 2015 Wilson Doctor, Navy Project Manager
- 2. 2 BRAC Program Management Office Presentation Overview •Purpose and Objective •Background •Five Year Review Sites, Locations, and Background –IR Site 1 –IR Site 22 –IR Site 26 –IR Site 28 •Site Specific Findings & Protectiveness Statements •Schedule •Questions 2/12/2015
- 3. 3 BRAC Program Management Office Purpose and Objective of Five Year Review 2/12/2015 Purpose •Under CERCLA §121(c), the Navy is required to review the progress of CERCLA remedies at federal installations where hazardous substances remain on the site at levels that do not allow for unlimited use and unrestricted exposure. This must be done at a minimum frequency of every five years. Objective •The fundamental objective of the Five Year Review is to ensure continuing protectiveness of the remedies.
- 4. 4 BRAC Program Management Office Background Trigger Date for Five Year Reviews •A Five Year Review schedule is triggered by the start of the first remedial action that leaves hazardous substances, pollutants or contaminants on site at levels that do not allow for unlimited use and unrestricted exposure. •This is the third Five Year Review for IR Sites 22, 26, and 28, and the fourth for IR Site 1. •After completion of the Five Year Review, the trigger for subsequent reviews is the date of the previous Five Year Review. 2/12/2015
- 5. 5 BRAC Program Management Office IR Sites – Five Year Review •The Navy issued a Draft Five Year Review report dated November 21, 2014 for the following sites: –IR Site 1 (Runway Landfill) –IR Site 22 (Golf Course Landfill) –IR Site 26 (East-Side Aquifer Treatment System [EATS] Area) –IR Site 28 (West-Side Aquifers Treatment System [WATS] Area) 2/12/2015
- 6. 6 BRAC Program Management Office Former NAS Moffett Field Five Year Review Sites 2/12/2015
- 7. 7 BRAC Program Management Office IR Site 1 – Runway Landfill •Decision Document - Record of Decision (ROD) completed in 1997 •Chemicals of Concern (COCs) - Dissolved metals - Volatile organic compounds (VOCs) - Semivolatile organic compounds (SVOCs) - Pesticides - Polychlorinated bi-phenyls (PCBs) •Remedy - Consolidate Site 2 waste into Site 1 - Installed a multi-layer cap - Semiannual groundwater and land fill gas monitoring 2/12/2015
- 8. 8 BRAC Program Management Office IR Site 1 - Runway Landfill (continued) •Remedy (cont.) - Post-closure maintenance of cap - Institutional Controls (ICs) and Engineering Controls (ECs) •Current Status - Quarterly landfill site inspections by Navy and Santa Clara County Department of Environmental Health (DEH) - Groundwater and landfill gas monitoring 2/12/2015
- 9. 9 BRAC Program Management Office IR Site 1 – Runway Landfill 2/12/2015
- 10. 10 BRAC Program Management Office IR Site 22 – Golf Course Landfill •Decision Document - Record of Decision (ROD) completed in 2002 •COCs - VOCs - SVOCs - Pesticides •Remedy - Landfill cover - Institutional controls - Groundwater and landfill gas monitoring 2/12/2015
- 11. 11 BRAC Program Management Office IR Site 22 – Golf Course Landfill (continued) •Current Status - Quarterly landfill site inspections by Navy and Santa Clara DEH - Groundwater and landfill gas monitoring 2/12/2015
- 12. 12 BRAC Program Management Office IR Site 22 – Golf Course Landfill 2/12/2015
- 13. 13 BRAC Program Management Office IR Site 26 – East-Side Aquifer Treatment System (EATS) •Decision Document - ROD completed in 1996 - ROD Amendment completed in September 2014 •COCs - VOCs - 1,2-dichloroethane (1,2-DCA) - 1,2-dichloroethene (1,2-DCE) - 1,1-dichloroethene (1,1-DCE) - tetrachloroethene (PCE) - trichloroethene (TCE) •Remedy - Groundwater monitoring - EATS (extraction and ex-situ treatment) 1999-2003 - ICs 2/12/2015
- 14. 14 BRAC Program Management Office IR Site 26 – EATS (continued) •Investigations - 2003–2010 Treatability Studies - Focused Feasibility Study completed in 2012 •Current Status - Annual groundwater monitoring event (Sept/Oct) and biannual well gauging (March and September) - ROD Amendment for biostimulation/bioaugmentation, monitored natural attenuation, and ICs 2/12/2015
- 15. 15 BRAC Program Management Office IR Site 26 - EATS 2/12/2015
- 16. 16 BRAC Program Management Office IR Site 28 – West-Side Aquifers Treatment System (WATS) •Decision Documents - ROD completed in 1989 - Vapor Intrusion ROD Amendment completed in 2010 •COCs - TCE - 1,2-DCE - PCE - Vinyl Chloride •Remedy - WATS (extraction and ex-situ treatment) treating groundwater - Vapor intrusion 2/12/2015
- 17. 17 BRAC Program Management Office IR Site 28 – WATS (cont.) •Investigations - 2010 Supplemental Investigation – Former Building 88 and Traffic Island Area - 2010-2011 In-situ Bioremediation Pilot Study - 2012-2014 Vapor Intrusion (VI) evaluation - 2013-2014 Groundwater investigation of deep aquifer •Current Status - WATS operating - Groundwater monitoring events (March and October) - Vapor intrusion assessment and mitigation 2/12/2015
- 18. 18 BRAC Program Management Office IR Site 28 - WATS 2/12/2015
- 19. 19 BRAC Program Management Office Components of Five Year Review 2/12/2015
- 20. 20 BRAC Program Management Office Components of Five Year Review (continued) 2/12/2015 Assess Protectiveness •A technical assessment is performed with the objective of answering the following three questions:
- 21. 21 BRAC Program Management Office Draft Site Specific Findings & Protectiveness Statements •All sites are functioning or will be functioning as intended by their Record of Decision. •Exposure assumptions, cleanup levels, and Remedial Action Objectives used at the time of the remedies are still valid. •No other information has come to light that could call into question the protectiveness of the remedies. •Remedies are protective of human health and the environment. 2/12/2015
- 22. 22 BRAC Program Management Office Schedule •Issued Draft Five Year Review – November 2014 •Review of Draft Five Year Review – current •Issue Final Five Year Review 2/12/2015
- 23. 23 BRAC Program Management Office Questions 2/12/2015