Superfund Information Systems: Site Profile

Superfund Site:

FAIRCHILD SEMICONDUCTOR CORP. (MOUNTAIN VIEW PLANT)
MOUNTAIN VIEW, 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 02/11/1991
Remedial Investigation Started 06/09/1985
Final Remedy Selected 06/09/1989
Remedial Action Started 04/04/1995
Construction Completed 08/24/1999
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 09/30/2019
Site Ready for Reuse and Redevelopment Not Yet Achieved

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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 08/15/1985 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 12/21/1999 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 02/29/2000 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 07/27/2017 00
Unilateral Administrative Order (EPA Performed) OU 00 - SITEWIDE 11/29/1990 00
Removal (EPA Performed) OU 00 - SITEWIDE 02/13/1989 05/05/1989 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/30/2004 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/30/2009 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/29/2014 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/30/2019 00
Feasibility Study (PRP Performed, EPA Oversight) OU 01 - REGIONAL 09/27/2007 Estimated Mar - May 2022 01
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 01 - REGIONAL 06/09/1985 08/15/1985* 01
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 01 - REGIONAL 08/15/1985* 06/09/1989 01
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 01 - REGIONAL 06/16/2006 08/16/2010 01
Proposed Plan (EPA Performed) OU 01 - REGIONAL 07/09/2009 07/09/2009 01
Record of Decision (EPA Performed) OU 01 - REGIONAL 06/09/1989 01
Record of Decision Amendment (EPA Performed) OU 01 - REGIONAL 08/16/2010 01
Record of Decision Amendment OU 01 - REGIONAL Estimated Mar - May 2022 01
Explanation of Significant Differences (EPA Performed) OU 01 - REGIONAL 09/01/1990 01
Explanation of Significant Differences (EPA Performed) OU 01 - REGIONAL 04/16/1996 01
Remedial Design (PRP Performed, EPA Oversight) OU 01 - REGIONAL 01/02/1991 12/11/1996 01
Remedial Design (PRP Performed, EPA Oversight) OU 01 - REGIONAL 09/22/2011 Estimated Mar - May 2021 01
Remedial Action (PRP Performed, EPA Oversight) OU 01 - REGIONAL 12/11/1996 03/16/2000 01
Remedial Action (PRP Performed, EPA Oversight) OU 01 - REGIONAL 11/16/2012 01
Long-Term Response Action (EPA Performed) OU 01 - REGIONAL 09/09/1998 01
Long-Term Response Action OU 01 - REGIONAL Estimated Dec 2021 - Feb 2022 01
Remedial Design (PRP Performed, EPA Oversight) OU 02 - SOURCE CONTROL (SOILS & GW) 01/02/1991 04/04/1995 02
Remedial Action (PRP Performed, EPA Oversight) OU 02 - SOURCE CONTROL (SOILS & GW) 04/04/1995 09/28/2001 02
Long-Term Response Action (PRP Performed, EPA Oversight) OU 02 - SOURCE CONTROL (SOILS & GW) 09/28/2001 02
Removal OU 03 - EVANDALE/LEONG/SEWER SOURCE AREAS Estimated Sep - Nov 2020 Estimated Sep - Nov 2022 03
Remedial Investigation (PRP Performed, EPA Oversight) OU 03 - EVANDALE/LEONG/SEWER SOURCE AREAS 02/17/2016 * 03
Remedial Action (PRP Performed, EPA Oversight) OU 03 - EVANDALE/LEONG/SEWER SOURCE AREAS 09/14/2015 * 03

*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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