Superfund Information Systems: Site Profile

Superfund Site:

LOCKHEED WEST SEATTLE
SEATTLE, WA

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 Not Yet Achieved
Proposed to the National Priorities List 09/27/2006
Finalized on the National Priorities List 03/07/2007
Remedial Investigation Started 07/28/2006
Final Remedy Selected 08/28/2013
Final Remedial Action Started 05/09/2018
Construction Completed Estimated Mar - May 2020
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review Not Yet Achieved
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 01 - REMEDIAL 04/13/2006 01
Administrative Order of Consent (EPA Performed) OU 01 - REMEDIAL 07/28/2006 01
Unilateral Administrative Order (EPA Performed) OU 01 - REMEDIAL 04/02/2015 01
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 01 - REMEDIAL 07/28/2006 08/28/2013 01
Record of Decision (EPA Performed) OU 01 - REMEDIAL 08/28/2013 01
Explanation of Significant Differences (EPA Performed) OU 01 - REMEDIAL 02/12/2015 01
Remedial Design (PRP Performed, EPA Oversight) OU 01 - REMEDIAL 04/13/2015 05/09/2018 01
Remedial Action (PRP Performed, EPA Oversight) OU 01 - REMEDIAL 05/09/2018 Estimated Dec 2019 - Feb 2020 01

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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