Middlefield-Ellis-Whisman (MEW) EPA Superfund Study Area (or MEW Site) is comprised of three Superfund sites Mountain View California

Groundwater Contamination Map Toxic Plumes Map Source: The Chemical Legacy of Old Silicon Valley, NBC Bay Area, Map Editor Scott Pham 2019 https://www.nbcbayarea.com/on-air/as-seen-on/toxic-plumes_-the-dark-side-of-silicon-valley_bay-area/87485/

Envirostor State of California Link: “The EPA added this site to the National Priorities List (NPL) in 1991. This Superfund site is comprised of several former Fairchild Semiconductor Corp facilities spanning 56 acres in Mountain View. The Fairchild Semiconductor Corp – Mountain View site is one of three Superfund or NPL sites that are being cleaned up simultaneously. The other two Superfund sites are the Intel – Mountain View site and the Raytheon site. All three sites are located in the Middlefield-Ellis-Whisman (MEW) Study Area and are being addressed collectively as the MEW SIte. Site investigations at several of these facilities during 1981 and 1982 revealed extensive soil and groundwater contamination, primarily VOCs. Soil cleanup by soil vapor extraction, excavation, and aeration has been completed at all the MEW study area sites. Groundwater remediation is ongoing at the MEW Study Area.”

The contaminants which have been detected in soil and groundwater include trichloroethylene (TCE), trichloroethane (TCA), dichloroethylene (DCE) and chloroform. Continue reading “Middlefield-Ellis-Whisman (MEW) EPA Superfund Study Area (or MEW Site) is comprised of three Superfund sites Mountain View California”