The 180-acre Fort Lewis (Landfill No. 5) site is located on the west side of the 86,000-acre Fort Lewis Military Reservation in Pierce County, Washington. From 1967 to 1990, the landfill accepted 77,000 tons per year of mixed municipal, industrial, commercial, and residential waste and 188,000 cubic yards per year of demolition waste from the Fort Lewis Military Reservation, the VA Medical Center, and McChord Air Force Base. Dewatered sludge from the Fort Lewis Sewage Treatment Plant was also disposed onsite. In 1985, as part of the closure procedures for the inactive portions of Landfill No. 5, the Army covered the east-west trenches with a multi-layer cap. Ground water modeling conducted from 1980 to 1984 revealed that contaminant concentrations in the ground water did not exceed regulatory standards and will decrease over time because the cap will reduce leachate production. The ROD addresses a final remedy for the inactive portions of the landfill. Recent investigations by the Army indicate that conditions at the site currently pose no unacceptable risks to human health or the environment.

"07/10/92." "PB93-964607." "EPA/ROD-R10-92-049." "Office of Emergency and Remedial Response."