The Camp Pendleton Marine Corps Base site covers 125,000 acres in San Diego County, California. The base provides housing, training, logistical and administrative support for the Fleet Marine Force units. Past disposal practices have contaminated the groundwater and soil. In an initial investigation, the Marine Corps found nine areas of contamination. Waste generation operations include maintenance and repair of vehicles (trucks, tanks and aircraft), landfill operations, waste disposal areas such as scrap yards, and firefighting drill areas. The base contains wetlands, streams and rivers that feed into the Pacific Ocean. This land is the only remaining undeveloped area between Los Angeles and San Diego. The site�s long-term cleanup is ongoing.