Superfund Information Systems: Site Profile

Superfund Site:

WESTINGHOUSE ELECTRIC CORP. (SUNNYVALE PLANT)
SUNNYVALE, CA

Cleanup Progress

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Cleaning up Superfund sites is a complex, multi-phase process. Learn more:

Site Milestones

Milestone Date(s)
Initial Assessment Completed 07/01/1984
Proposed to the National Priorities List 10/15/1984
Finalized on the National Priorities List 06/10/1986
Remedial Investigation Started 10/01/1981
Final Remedy Selected 10/16/1991
Remedial Action Started 06/28/1994
Final Remedial Action Started 03/19/1997
Construction Completed 09/27/2000
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 08/23/2016
Site Ready for Reuse and Redevelopment 05/02/2019

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Cleanup Schedule by Operable Unit

During cleanup, a site can be divided into a number of distinct areas depending on its complexity. These areas, called operable units (OUs), may address geographic areas, specific problems, or areas where a specific action is required. Examples of typical operable units include construction of a groundwater pump and treatment system or construction of a cap over a landfill.

Milestone OU Start Date Completion Date OU ID
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 08/24/1988 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 02/06/1992 00
Unilateral Administrative Order (EPA Performed) OU 00 - SITEWIDE 02/06/1992 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/28/2001 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/27/2006 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/29/2011 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 08/23/2016 00
Five-Year Review OU 00 - SITEWIDE Estimated Aug - Oct 2021 00
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 01 - OVERALL SITE 10/01/1981 08/24/1988* 01
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 01 - OVERALL SITE 08/24/1988* 10/16/1991 01
Record of Decision (EPA Performed) OU 01 - OVERALL SITE 10/16/1991 01
Explanation of Significant Differences (EPA Performed) OU 01 - OVERALL SITE 03/14/1997 01
Explanation of Significant Differences (EPA Performed) OU 01 - OVERALL SITE 09/30/2008 01
Remedial Design (PRP Performed, EPA Oversight) OU 01 - OVERALL SITE 02/06/1992 06/28/1994 01
Remedial Design (PRP Performed, EPA Oversight) OU 01 - OVERALL SITE 10/01/1992 06/28/1994 01
Remedial Action (PRP Performed, EPA Oversight) OU 01 - OVERALL SITE 06/28/1994 09/30/1996 01
Remedial Action (PRP Performed, EPA Oversight) OU 01 - OVERALL SITE 03/19/1997 01

*NOTE: This date may not reflect the actual start or actual completion of the milestone. Either the lead for this activity changed, the project was phased, or the project did not fit the normal definitions of activities tracked in this table.

NOTE: Dates and estimated dates will not display for all milestones. Estimated dates only display for milestones planned within the next three fiscal years. Estimated dates and start dates will not display for the following enforcement milestones: Administrative Order of Consent, Consent Decree and Unilateral Administrative Order. Start dates will not display for the following document milestones: Five-Year Review, Record of Decision, Record of Decision Amendment, Explanation of Significant Differences and Partial NPL Deletion.

DISCLAIMER: The data on this page are derived from the Superfund Enterprise Management System and are solely for informational purposes. The data cannot be relied upon to create any substantive or procedural rights or requirements enforceable by any party in litigation with any member of the public, states, tribes, the United States or any federal agency. EPA reserves the right to change these data at any time without public notice.

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