The Double Eagle Site (Site) is located on approximately 12 acres in Oklahoma City, Oklahoma County, Oklahoma. From 1929 until the early 1980's, the facility refined used motor oils by a process of acidulation and filtration. The EPA, in accordance with the CERCLA, included the Site on its National Priorities List in 1989. The Site consists of mixed wetland and upland habitats and the riparian zone of the North Canadian River, which is located approximately one-half mile south of the Site. There were six storm water and sludge/sediment impoundments located on the Site which were contaminated with polycyclic aromatic hydrocarbons (PAH’s), chlorinated hydrocarbons (1,2 – dichloroethane, tetrachlorethane, trichloroethene), polychlorinated biphenyls (PCB’s), benzenes, ketones (2-butone), lead, arsenic, antimony and other metals, and chemicals associated with refinery processes.