WARRENVILLE -- The U.S. Environmental Protection Agency has determined that the required cleanup of the DuPage County Landfill/Blackwell Forest Preserve Superfund Site in Warrenville is complete.
With its removal from the EPA's National Priorities List, the agency determined no further remediation is needed other than routine operation and maintenance, monitoring and five-year reviews are necessary to protect human health and the environment. The 40-acre DuPage County Landfill/Blackwell Forest Preserve Superfund Site is located within the 1,200-acre Blackwell Forest Preserve.
The landfill accepted waste between 1965 and 1973. Known as Mt. Hoy, the waste and soil mountain rises 150 feet above the original ground surface. EPA placed the site on the National Priorities List in 1990.
EPA repaired the landfill cap, installed an extraction system, treated and disposed of the landfill leachate, and installed additional landfill gas vents. EPA continues to monitor the natural breakdown of groundwater contamination.