Remedial Action at Former Mare Island Naval Shipyard, Investigation Area F1 (IA F1)

Remedial Action at Former Mare Island Naval Shipyard, Investigation Area F1 (IA F1)

The California Department of Toxic Substances Control (DTSC) approved the Record of Decision (ROD)/Remedial Action Plan (RAP) for the former Mare Island Naval Shipyard IA F1. The action consists of excavation, removal, and off-site disposal of 1,250 cubic yards of lead-contaminated soil from upland areas, as well as dredging, removal, and off-site disposal of 3,600 cubic yards of metals-contaminated wetland sediment. Clean soil and sediment will be imported and placed in the excavated areas as part of site restoration. The upland areas, referred to as Subarea 4 and Subarea 5 will remain clear after the project is complete to provide a wild land fire control break and be available for possible future reuse. A small portion of Subarea 6 will be replanted with similar vegetative types and quantities as currently found on the site. The excavation within a wetland (a majority of Subarea 6) will be back filled with imported sediment and the wetland, including wetland vegetation, will be restored to its current condition. The project will be. scheduled for a time of the year (April through October) when rainfall is unlikely. The Department of Defense derives authority to undertake this cleanup action under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) under 42 United States Code U.S.C. Section 9604, 10 U.S.C. Section 2705. DTSC is proposing to approve this project pursuant to the authority granted under Chapter 6.8, Division 20, California Health and Safety Code (H&SC).

Solano