The Barstow Marine Corps Logistics Base site covers 5,687 acres east of Barstow, California. The site consists of three areas: the Nebo area, the Yermo area and the Rifle Range. The base has two major functions: providing equipment maintenance, repair, overhaul and rebuilding, and receiving, storing, maintaining, issuing and shipping materials. Consequently, most of the wastes historically generated by the base have been vehicle-related and war surplus. Investigations by the Marine Corps have found 38 areas of contamination on the base. Site investigations and cleanup are ongoing.