In September 2024 EPA completed the Sixth Five-Year Review for the Site. The Five-Year Review concluded that the remedy for Operable Unit 1 (Soil and Groundwater) was “short-term protective” and the remedy for Operable Unit 2 (Vapor Intrusion) “will be protective” once the remedy is fully implemented.
| City | Mountain View |
|---|---|
| County | Santa Clara County |
| State | California |
| Coordinates | 37.41080, -122.07970 |
Teledyne Semiconductor is a federal Superfund site in California. The Superfund program, created by Congress in 1980, addresses sites where hazardous substances have been released or threaten release into the environment. EPA scores potential sites using the Hazard Ranking System; those that score high enough are placed on the National Priorities List.
Current status: Ready for anticipated reuse. EPA considers this site ready for anticipated reuse, meaning cleanup has progressed enough for certain land uses. This does not necessarily mean all contamination has been removed — institutional controls like deed restrictions may limit how the land can be used.
EPA has identified 10 contaminants of concern at this site, including 1,1,1-trichloroethane, 1,1-dichloroethane, 1,1-dichloroethene. Contamination has been detected in groundwater, air.
If you live near this site and have health concerns, your state health department can provide site-specific guidance. EPA maintains a community involvement program for most NPL sites, and site documents — including the Record of Decision, five-year reviews, and public health assessments — are typically available through EPA's Superfund site profile.