Superfund Information Systems: Site Profile

Superfund Site:

LOCKHEED WEST SEATTLE
SEATTLE, WA

Operable Units

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Below, EPA has provided a list of the remedial actions selected pertaining to each operable unit.

EPA issues Records of Decision (RODs) to explain which cleanup methods will be used at Superfund National Priorities List sites. EPA has two primary documents that it may use to identify changes to the remedies selected in RODs. EPA uses a ROD Amendment when it needs to make a fundamental change to the remedy. EPA publishes an Explanation of Significant Differences (ESD) for significant changes.

During cleanup, complex sites may be divided into several distinct areas to make the response more efficient. These areas, called operable units (OUs), may address geographic areas, specific problems, or medium (e.g., groundwater, soil) where a specific action is required.

EPA is working to improve data quality. The information presented on this page is undergoing review for accuracy and completeness, and may be subject to change.

OU ID Name Decision Document Cleanup Technologies Selected
in the Decision Document
00 SITEWIDE No decision document
01 REMEDIAL Record of Decision
August 28, 2013
COC Only
Disposal (offsite)
Dredging
Enhanced Monitored Natural Recovery
Excavation
Institutional Controls
Monitoring (sediment)
Monitoring (surface water)
01 REMEDIAL Explanation of Significant Differences
February 12, 2015
ESD/Amd - ROD Error Correction

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