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Record of Decision System (RODS)



Address:  OFF SANFORD RD. 
City & State:  NORTH KINGSTOWN  RI  02818
County:  KENT
EPA ID:  RI6170022036
EPA Region:  01
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R01-93/080
ROD Date:  09/23/1993
Operable Unit(s):  02
Media:  Soil, Debris
Contaminant:  Organics
Abstract:  The Davisville Naval Construction Battalion Center site is an inactive naval depot located in North Kingstown, Rhode Island. The facility is composed of three areas, which include the Main Center, the West Davisville storage area, and Camp Fogarty, located 4 miles to the west. In 1942, the Quonset Point Naval Air Station expanded to become the Davisville Naval Construction Battalion Center (NCBC), which was designated as an Advanced Base Depot and the Naval Construction Training Center. The site was inactive during World War II, but in 1951 it became the Headquarters Construction Battalion Center (CBC) for loading ships and training men for the Korean and Vietnam Wars. In 1974, activities at the base were reduced. Two base sites, Site 12, located within Building 316 in West Davisville, and Site 14, located within Building 38 at the Main Center, were used to store electrical transformer units. In 1977, a transformer containing PCB oil was punctured accidentally with a forklift in Building 316, and the spill was cleaned up by NCBC personnel. In 1981, another oil spill was noted in Building 38 in the area where electrical transformers were stored. As a result of these two documented onsite spills in 1977 and 1981, a number of investigations were conducted as part of the Department of Defense's Installation Restoration Program (IRP) and two previous removal actions were implemented. In 1991, PCB-contaminated concrete and subgrade materials fromthe floor in Building 316 were removed and disposed of, and additional PCB- contaminated asphalt materials and subgrade were removed from the soil at Building 38. Later in 1991, at the request of EPA, post removal verification sampling was conducted in order to confirm and document previous removal actions. These investigations revealed that residual amounts of PCB contamination remained in the flooring surrounding the removal areas and in subgrade soil. Based on the IRP, there are currently 12 areas of contamination (AOCs) and four study areas onsite that are under investigation. This ROD addresses PCB contamination at Sites 12 and 14, as OUs 1 and 2, respectively. The primary contaminants of concern affecting the soil and debris are organics, including PCBs. SELECTED REMEDIAL ACTION: The selected remedial action for this site includes removing PCB-contaminated flooring materials, 6 inches of subgrade soil, and PCB-contaminated dust from Sites 12 and 14; disposing of material containing PCBs at concentrations less than 500 mg/kg offsite at a federally permitted landfill; and incinerating offsite PCB-contaminated materials with concentrations greater than 500 mg/kg at a federally permitted incinerator; sampling all site areas to ensure that cleanup goals have been met; and implementing institutional controls. The estimated present worth cost forthis remedial action is $295,000. PERFORMANCE STANDARDS OR GOALS: Chemical- specific cleanup goals for all media are based on State standards, and include PCBs 10 mg/kg for contaminated soil, debris, and other materials; and 2 ug/100cm[2] for contaminated solid surfaces. INSTITUTIONAL CONTROLS: Institutional controls will be implemented to ensure that the site will not be utilized for residential use.
Remedy:  This remedy addresses remediation of contaminated flooring materials and soils at Sites 12 and 14 by eliminating or reducing the risks posed by the PCB contamination, through removal of flooring materials and soils with subsequent off-site disposal or off-site incineration, depending on the level of contamination. This action is intended to be the permanent remedy for Sites 12 and 14.

The major components of the selected remedy include:
. Removal of PCB-contaminated flooring materials (concrete of asphalt), 6-inches of subgrade soils and PCB-contaminated dust on other building surfaces.
. Off-site land disposal of material containing PCBs at concentrations of less than 500 ppm at a federally permitted TSCA landfill.
. Off-site incineration of material containing PCBs at concentrations of 500 ppm or greater at a federally permitted TSCA incinerator.
Text:  View full-text ROD [ 42K ]
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