||Explanation of significant difference for the superfund record of decision : Treasure Island Naval Station, Hunters Point Ship Yard Site, Parcel B, San Francisco, CA .
||Environmental Protection Agency, Washington, DC. Office of Emergency and Remedial Response.
|| U.S. Environmental Protection Agency, Office of Emergency and Remedial Response], Distributed by National Technical Information Service,
Hazardous waste sites--California.
Hazardous materials ;
Waste disposal ;
Land pollution control ;
Naval facilities ;
Petroleum products ;
Polycyclic aromatic hydrocarbons ;
Polychlorinated biphenyls ;
Soil contamination ;
Remedial action ;
ESD(Explanation of Significant Difference) ;
Explanation of Significant Difference ;
Record of Decision ;
Treasure Island Naval Station ;
Hunters Point Annex ;
San Francisco(California) ;
San Francisco County(California) ;
Volatile organic compounds ;
Semivolatile organic compounds ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 v. (various pagings) : ill., maps ; 28 cm.
This Explanation of Significant Differences (ESD) is for a change to the remedy selected in the Record of Decision for Parcel B, Hunters Point Shipyard dated October 7, 1997 (PB98-964501). In the Parcel B ROD< the Navy's selected remedy for contaminated soils located on Parcel B was excavation to the groundwater table followed by offsite disposal. The depth to groundwater below Parcel B was believed to typically occur at 10 feet below ground surface (bgs). However, in early 998, fieldwork on the Site indicated that the depth to groundwater beneath Parcel B could be as shallow as 2.3 feet bgs. This ESD revises the selected remedy of the Parcel B ROD to require cleanup of contaminated soils to a cleanup level of 10 to the -6th power cancer risk (residential) or to a maximum depth of 10 feet bgs instead of the groundwater table to ensure that the Parcel B remedy is protective of human health and the environment.
Cover title. "10/20/1998." "PB99-963110." "EPA/541/R-99/040." "1999."