The 65-acre Janesville Ash Beds site is located in Rock County, Wisconsin. The site includes five ash beds in an area about 400 feet by 400 feet. From 1974 to 1985, industrial liquids and sludges were deposited in this area and allowed to evaporate. The resultant dried sludge was then disposed of in two adjacent landfills � the Janesville Old Landfill, another Superfund National Priorities List (NPL) site, and the Janesville New Landfill, which is regulated by the Resource Conservation and Recovery Act (RCRA). Both areas are now closed. These operations contaminated soil and groundwater with hazardous chemicals. Following cleanup, groundwater monitoring is ongoing.