Superfund Site Profile
The Johns’ Sludge Pond is a half-acre site in Wichita, Kansas. From 1951 to 1970, the Super Refined Oil Company recycled waste oil and disposed of about 7,000 cubic yards of oily sludge in an unlined pond. These activities contaminated groundwater with lead and polychlorinated biphenyls (PCBs). Following cleanup, maintenance activities and monitoring are ongoing. EPA removed the site from the Superfund program’s National Priorities List (NPL) in 1992.