Superfund Site Profile
From 1947 to 1991, National Wood Preservers ran a wood treatment operation on this site in Delaware County, Pennsylvania. The company reportedly disposed of liquid waste in a well leading to groundwater under the plant. The wastes where mostly oil contaminated with pentachlorophenol (PCP). The liquid wastes leaked into nearby Naylor’s Run, a small stream that flows through a residential area and then empties into the Delaware River. Liquid wastes were also spilled on the surface, contaminating soil in the area. Approximately 26,000 people live within a mile of the site and there are no known users of the groundwater within a one mile radius of the site. The nearby population is on the public water supply. Operations and maintenance activities are ongoing.
TOPICS IN FOCUS
Five-Year Reviews generally are required by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) or program policy when hazardous substances remain on site above levels which permit unrestricted use and unlimited exposure. Five-year reviews provide an opportunity to evaluate the implementation and performance of a remedy to determine whether it remains protective of human health and the environment.
The Fifth Five-Year Review of the Site was completed in September 2015. The full text of the report can be read here.