The Marine Corp Reserve Component, Site SS003, Oil Saturated Area, is located in the southern part of the former Richards-Gebaur Air Force Base, situated near the southeast corner of the intersection of East 155th Street and Bales Avenue and south of Building 703. The site was used to store waste oil products generated by vehicle maintenance from the mid-1950s to the late 1980s. The site is currently used as a vehicle maintenance and storage facility known as the Humvee Area. The adjacent fenced area located south of the Humvee Area is used for base facility maintenance operations. Investigations in 1986 and 1989 identified a small area of total petroleum hydrocarbon contamination in soil at the site. Approximately 42 cubic yards of contaminated soils were removed from the site in 1991 and 1992. Additional sampling conducted during the Remedial Investigation (RI) in 1999 to 2000 did not identify any additional soil contamination, but did however identify an area of chlorinated solvent groundwater contamination encompassing approximately 2.7 acres. It is anticipated that future land use for SS003 will continue as light industrial use.