Superfund Record of Decision (EPA Region 3): Naval Weapons Station (WPNSTA),211 Operable Units 12, 13, 14, and 15, Yorktown, VA., October 13, 1998

摘要

This Record of Decision (ROD) documents the selected remedial action to reduce211u001ethe risks posed by contaminated media at Sites 6 and 7 located at WPNSTA 211u001eYorktown, Yorktown, Virginia. The removal and treatment of soil/sediment and 211u001eBuilding 109 residue at OU XIII, Site 6-Flume Area, and a soil cover at OU XIV, 211u001eSite, 6-Excavated Area, address, the principal threat to human health and the 211u001eenvironment by eliminating source materials and potential release of these 211u001econtaminants to the environment. They also mitigate the potential for direct 211u001econtact with soil at the Site 6-Excavated Area Long-term monitoring of sediment, 211u001esurface water, and groundwater at OU XV will: (1) evaluate the efficacy of the 211u001eremoval planned for the Site-6 Flume Area in removing a potential source of 211u001econtinuing contaminant release and (2) provide temporal data about conditions in 211u001ethe Site 6-Impoundment Area and the quality of shallow groundwater which may 211u001einterconnect with Sites 6 and 7 surface water and sediments.