Feasibility Study Report for Unsaturated Soils at the Maintenance Yards (Areas of Contamination 44 and 52) Fort Devens
Abstract
Due to the presence of contamination in soils at the Cannibalization Yard (SA 44) and the Table of Distribution and Allowances (TDA) Maintenance Yard (SA 52), these two sites were designated as AOCs and are being looked at as one operable unit. The USAEC has directed ABB-ES to conduct a FS for the unsaturated soils in AOCs 44 and 52. Should investigation indicate that groundwater has been affected by AOCs 44 and 52 soils, remediation of groundwater will be addressed under a separate operable unit. As part of this Feasibility Study, general response objectives were formulated for the soils based on contaminants of concern defined during the Site Investigation, quantitative risk evaluation, and analysis of site-specific applicable or relevant and appropriate requirements. The following general response objectives were identified for the soil medium at AOCs 44 and 52: * Minimize direct contact/ingestion and inhalation with AOCs 44 and 52 surface soils which are estimated to exceed the USEPA Superfund target range of 1E-4 to 1E-6 excess cancer risk for carcinogens. * Reduce off-site run-off of contaminants that might result in concentrations in excess of ambient surface water quality standards and in background concentrations in sediments. Reduce or contain the source of contamination to minimize potential migration of contaminants of concern which might result in groundwater concentrations in excess of the Maximum Contaminant Levels. Specific remedial action objectives were developed and response actions for soils in AOCs 44 and 52 were then developed and include the following: No Action, Limited Action, Containment, In-situ Treatment, Collection/Removal, Treatment, and Discharge/Disposal.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1994
- Accession Number
- ADA467060