| Abstract |
The 650-acre Fort Lewis Logistics Center site is a military storage and maintenance facility in Pierce County, Washington. Surrounding land use is mixed residential and commercial. The site overlies a surficial aquifer, and a deeper bedrock aquifer that is used as a water supply to over 85,000 people in the area. The Logistics Center is an industrial complex, which includes warehouses, motor pools, maintenance facilities, and an equipment disposal yard. From the 1940s to the mid 1970s, solvents including TCE and PCE were used as degreasers during maintenance activities. The solvents were frequently combined with waste oil and disposed of at several locations within the Logistics Center. Site investigations from 1985 to 1988 detected VOC contamination in onsite monitoring wells and offsite private wells. As a result of these findings, affected residents were connected to a public water supply. The Record of Decision (ROD) addresses restoration of the contaminated surficial ground water aquifer, and provides a final remedy for the site. Confirmation soil sampling and further characterization of the deep aquifer contamination will be evaluated as part of the remedial action. The primary contaminants of concern affecting the ground water are VOCs including DCE, PCE, and TCE. |
