andersen air force base

PERIMETER RD

Andersen Air Force Base (AAFB) is a 20,000-acre site located in the city of Yigo on the northern end of the island of Guam. Operational since 1940, AAFB's main purpose has been to provide support for Strategic Air Command operations. Hazardous substances associated with AAFB operations include solvents such as trichloroethane (TCE) and paint thinners; dry cleaning fluids and laundry products; fuels such as JP-4 and gasoline; pesticides; antifreeze; aircraft cleaning compounds; and polychlorinated biphenyls (PCBs). These substances are found in unlined landfills, drum storage and disposal areas, chemical storage areas, fire training areas, waste storage areas, the laundry facility, and industrial and flight line operations. AAFB is located in a karst limestone terrain. The Northern Guam Lens is a Sole Source Aquifer underlying the site. This aquifer supplies drinking water to at least 50 percent of the area residents; approximately 40,200 people draw drinking water from wells located within a four-mile radius of the site. Groundwater sampling by the Air Force indicates the presence of volatile organic compounds (VOCs) in the groundwater, though no water wells currently produce water from contaminated areas.

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