Superfund Information Systems: Site Profile

Superfund Site:

SYNERTEK, INC. (BUILDING 1)
SANTA CLARA, CA

Health & Environment

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What Are the Risks at the Site?

Your drinking water is not affected by contamination associated with the Site. Drinking water is supplied by the City of Santa Clara through the complex infrastructure of the State Water Project, the federal Central Valley Project, and San Francisco’s Hetchy Reservoir in the Sierra Nevada Mountains, not from groundwater in this area. This public water is regularly tested to ensure it fully meets drinking water standards.

Indoor air sampling at on- and off-property buildings conducted in 2013 and 2015 showed no evidence of unacceptable vapor intrusion from volatile organic compounds (VOCs).

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Contaminant Information

Groundwater at the Site has been contaminated by VOCs, primarily by the chemical trichloroethene (TCE). TCE was used in the production of semiconductors at the Site and was inadvertently leaked from underground storage tanks between 1974 and 1982. Groundwater containing TCE migrated approximately 700 feet to the north of the Site before the groundwater treatment system was put into place.

View a full list of contaminants of concern for this site.

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Performance Measures

EPA uses performance measures to track environmental results at Superfund sites. If you have any questions or concerns about the measures at this site, please contact the site team members listed under Site Contacts.

Read more about Superfund Remedial Performance Measures.

Performance
Measure
Status at this
Superfund Site
What does this mean?
Human Exposure Under Control Yes Yes means assessments indicate that across the entire site:
  1. There are currently no unacceptable human exposure pathways; and
  2. EPA has determined the site is under control for human exposure.

No means an unsafe level of contamination has been detected at the site and a reasonable expectation exists that people could be exposed.

Insufficient data means that, due to uncertainty regarding exposures, one cannot draw conclusions as to whether human exposures are controlled, typically because:
  1. Response to the contamination has not begun; or
  2. The response has begun, but it has not yet generated information sufficiently reliable to evaluate whether there are currently any unacceptable human exposure pathways at the site.
Groundwater Migration Under Control Yes

Yes means EPA reviewed all information on known and reasonably expected groundwater contamination. EPA concluded the migration of contaminated groundwater is stabilized and there is no unacceptable discharge to surface water. EPA will conduct monitoring to confirm that affected groundwater remains in the original area of contamination.

No means EPA has reviewed all information on known and reasonably expected groundwater contamination, and the migration of contaminated groundwater is not stabilized.

Insufficient data means that due to uncertainty regarding contaminated groundwater migration, EPA cannot draw conclusions as to whether the migration of contaminated groundwater is stabilized.

Construction Complete Yes

Yes means the physical construction of the cleanup is complete for the entire site.

No means either physical construction is not complete or actions are still needed to address contamination.

Sitewide Ready for Anticipated Use Yes Yes means:
  1. All cleanup goals affecting current and reasonably anticipated future land uses of the entire site have been achieved, so there are no unacceptable risks;
  2. All required land-use restrictions or other controls have been put in place; and
  3. The site has achieved Construction Complete status.

No means that one or more of these three criteria have not been met. However, a site listed as no may still have redevelopment occurring on portions of the site and may be eligible for additional redevelopment.

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