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Record of Decision System (RODS)

NAVAL SURFACE WARFARE CENTER - DAHLGREN

Abstract

Site Name:  NAVAL SURFACE WARFARE CENTER - DAHLGREN
Address:  2 MI E OF INTER 301 & 206 
City & State:  DAHLGREN  VA  22448
County:  KING GEORGE
 
EPA ID:  VA7170024684
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-97/180
ROD Date:  09/30/1997
Operable Unit(s):  01
 
Media:  Groundwater,Soil
 
Contaminant:  Aluminum, arsenic, barium, chromium, copper, iron, lead, mangenese, mercury, silver, thallium, zinc, 1,1-dichloroethane, 1,1,1-trichloroethane, toluene, DDD, DDE, DDT, endrin aldehyde.
 
Abstract:  The Naval Surface Warfare Center Dahlgren site (NSWCDL) is located in Dahlgren, Virginia. This document covers the Chemical Burn Area, Site 12, of the installation. The CBA is one of several installation restoration sites at the NSWCDL facility. Site 12 is situated on the mainside of the base and is bounded on its western side by Gambo Creek.Activity in the vicinity of Site 12 first began about 1952 when a 600 by 600 foot area was cleared of vegetation. Later, around 1964, two pits were observed in the cleared area. It was reported that fuel had been used to burn laboratory materials and metallic hardware and equipment at the pit. The last burn was conducted in the fall of 1982. By 1986, the pit and fence at Site 12 were no longer visible due to the amount of vegetation present in the area. By late 1986, the fence was removed and the pit was filled in by regrading the area. Known or potential wastes disposed of at Site 12 include fuel oils, spent solvents, metals, caustics, hypochlorite, polymers, glues, and decontaminated chemical warfare agent solution.Site 12 was identified as a potential area of contamination in the initial investigation performed in the early 1980s. Confirmation of contamination at Site 12 occurred between 1983 and 1984. Results of sampling at the site were reported in 1986.
 
Remedy:  The selected remedy for Site 12 is to remove volatile organic compounds from groundwater and soils using air sparging/soil vapor extraction, and to provide institutional controls and groundwater, surface water, and sediment monitoring. No action is required for surface soils at Site 12.
 
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