| Abstract |
The Beckman Instruments (Porterville) site, which includes the Beckman plant and surrounding study area, is in the city of Porterville, California. The 12-acre Beckman plant has manufactured electronic instrument assemblies and circuit boards since 1967. Wastewater from industrial processes including electroplating and degreasing, contains spent halogenated solvents, inorganic and acid solutions, salts, metal-laden solutions, and plating bath sludges. From 1974 to 1983, wastewater was discharged to an on-site solar evaporation pond; however, since 1983, wastewater has been treated onsite. Ground water in the vicinity of the pond was used for domestic and agricultural purposes until 1983 when ground water was found to be contaminated. Beckman subsequently closed the pond, provided alternate water supplies to approximately 300 residents in the area, and began ground water pumping and treatment using air stripping in 1985. Additionally, soil beneath the former pond as well as near a former pesticide operation area are known to be contaminated with elevated levels of lead. The primary contaminants of concern affecting the soil and ground water are volatile organic compounds including trichloroethylene, and metals including lead. |
