From: EPA

The U.S. Environmental Protection Agency has ordered Northrop Grumman Systems Corporation to spend an estimated $20 million to build a groundwater cleanup system to address groundwater contamination stemming primarily from the former Benchmark Technology facility in the City of Industry, Calif., located within the San Gabriel Valley Superfund Sites.

Formerly located at 200 South Turnbull Canyon Road, the Benchmark Technology facility is one of the largest sources of volatile organic compound groundwater contamination in the Puente Valley area of the Superfund site. Northrop Grumman will install wells and a treatment plant to contain and treat groundwater contaminated by VOCs and 1,4-dioxane. The treated water will then be discharged back to surface water or injected back into the underground aquifer, providing additional water resources to San Gabriel Valley residents.

Click on the links for more information.