POLLUTION LOCATOR| Superfund | Threats and Contaminants

Site Name:      SAN GABRIEL VALLEY (AREA 2)
EPA ID:      CAD980818512


The San Gabriel Valley Area 2 site, which has the Baldwin Park "Operable Unit," includes multiple plumes of groundwater contamination. The area of contamination is several miles long, thousands of feet wide, and hundreds of feet deep. The most prevalent contaminants in the groundwater are TRICHLOROETHENE (TCE), PERCHLOROETHYLENE (PCE), CARBON TETRACHLORIDE, and perchlorate. TCE, PCE, and CARBON TETRACHLORIDE are solvents used for degreasing and cleaning; perchlorate is a component of solid fuel rockets (including those used in the space shuttle). Other VOLATILE ORGANIC COMPOUNDS (VOCS) are also present. The peak contaminant concentration measured in groundwater is 7500 times the maximum contaminant level (MCL) allowed by Federal and State law. Water utilities in the area have been able to continue to provide their customers with clean water by shutting down wells in contaminated areas, installing "wellhead" treatment systems, blending contaminated water with clean water to meet drinking water standards, and by obtaining water from neighboring utilities. As the contamination continues to spread, however, the cost and difficulty of finding alternative water increases.