The Industrial/Storm Drain, site SD-25(S-20), is located within the central and northeastern portions of George Air Force Base. The Industrial/Storm Drain has been is operation since early 1940. It consist of the storm drain southeast of the East Storm Drain and the storm drain between the East Storm Drain and the Secondary runway (West Storm Drain), as well as the outfall ditch from the storm drains. .
There is more than one contaminant in the ground water at George Air Force Base. The one of most concern is TCE (Trichloroethylene). In addition to TCE, Benzene and 1,2-dichloroethane were detected. All at levels that exceed State and Federal drinking water standards. In addition to those contaminants, Jet Fuel had been leaking into the ground since the opening of George Air Force Base. George Air Force Base has a Liquid Fuel Distribution System, including five aboveground tanks, two major pipelines, seven fuel pits, and distribution lines. The media reported 183,000,000 Sq. Yards of Jet Fuel in the Ground Water. .
The Liquid Fuel Distribution System consists of six areas. This system delivered jet fuel from several large above ground tanks, near the main gate, to the runway several miles away. Where it was then dispensed from seven fuel hydrants to the aircraft. The investigation of the area was completed in 1992 and determined that fuel had leaked along the runway, and is present in four separate ways beneath the flight line. One in the Vadose zone, two in the capillary fringe, three as floating free product, and four as being dissolved in the groundwater. .
Landfills and Disposal Area make up 56 acres at the base. Most of them are disposal areas of varying size including several large "landfills". Other areas include the fire fighting training area, the engine test cells, a medical waste site, and carious small disposal points. Investigation of the contamination was completed in late 1995.