SF- 1598 BAY STREET (60002282) Voluntary Cleanup

Site History

Envirostor Page for 1598 BAY STREET, SAN FRANCISCO, CA 94123

Google Map

“The 1598 Bay Site is within the larger Pacific Gas and Electric Former North Beach Manufactured Gas Plant Site (MGP) Site identified and managed as APN 0459007. As part of the PG&E Former North Beach MGP Site, PG&E in 2016 excavated and disposed of approximately 9,000 cubic yards of soil impacted with MGP-residues, primarily polycyclic aromatic hydrocarbons (PAHs). The Removal Action Completion report for PG&E North Beach MGP- APN 0459007 documents the soil removal by PG&E.

As part of redevelopment of the Site into a four-story residential building with a first floor parking garage, the property owner/developer (also under DTSC oversight), installed and conducted verification testing of a vapor mitigation system (VMS). The Site Management Plan Implementation Report for the 1598 Bay Site documents the installation and verification testing of the VMS.

Post-construction indoor air and outdoor air sampling has been conducted and has been demonstrated to be protective for future occupants. Contamination left in place is addressed with institutional controls in the form of a Land Use Covenant and Agreement between DTSC and the property owner. Long term operation and maintenance of the VMS is managed under the Verification, Operation, and Maintenance Plan and Operations and Maintenance Agreement. (Updated by JT August 14, 2019).” Continue reading “SF- 1598 BAY STREET (60002282) Voluntary Cleanup”

TEXAS INSTRUMENTS – FORMER NATIONAL SEMI CONDUCTOR (SL720841216) EPA Superfund Site Santa Clara California

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

EPA Superfund Site Link 2900 SEMICONDUCTOR DRIVE SANTA CLARA, CA 95052

EPA Superfund Site : “The National Semiconductor Corporation (National Semiconductor) previously manufactured electronic equipment at this 50-acre site. Underground storage tanks, sumps, and pipes are the suspected sources for contaminated groundwater and soil in Sunnyvale underneath the site. Beginning in 1982, National Semiconductor closed and removed its leaking tanks and equipment, instituted a groundwater pump and treat system, and removed contaminated soil from selected areas of the facility. The contaminants of concern are primarily chlorinated organic solvents, including trichloloethene (TCE), which, along with other nearby National Priority List (NPL) sites including the Monolithic Memories Superfund Site, have contaminated a common groundwater area. Although these nearby sites are listed separately on the NPL, the cleanup activities at some of the sites are being coordinated as part of an area-wide cleanup approach.”

State of California Geotracker Site: “National Semiconductor Corporation (NSC) is located at 2900 Semiconductor Drive, Santa Clara. The NSC site is bordered by Central Expressway to the north, Kifer Road to the south, Lawrence Expressway to the east, and industrial/commercial buildings to the west. The site encompasses approximately 60 acres. Continue reading “TEXAS INSTRUMENTS – FORMER NATIONAL SEMI CONDUCTOR (SL720841216) EPA Superfund Site Santa Clara California”