LOCKHEED WEST SEATTLE
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The 40-acre Lockheed West Seattle site is located in Elliott Bay near the mouth of the West Waterway in Seattle, Washington. Harbor Island and Pacific Sound Resources are neighboring Superfund sites. The site includes about 7 acres of aquatic tidelands owned by the Port of Seattle and 33 acres of state-owned aquatic lands. Industrial activities generated considerable quantities of sandblast grit and other industrial waste that discharged to sediments and accumulated beneath dry docks and shipways. Historic industrial practices at the former shipyard contaminated sediment with hazardous chemicals. In August 2013, the EPA released its final cleanup plan, also known as a Record of Decision (ROD), for the site. The company expects to remove approximately 167,000 cubic yards of contaminated material over the course of the cleanup, reducing site risks to people's health and the environment. Thecleanup will begin in mid-August 2018 and is anticipated to be done in the spring of 2019.
What Is the Current Site Status?
Lockheed West Seattle is one of the remaining areas to be cleaned up at the Harbor Island Superfund site. The site was added to EPA's National Priorities List in 2007. Cleanup is needed to reduce contaminants in mud-dwelling animals, fish, shellfish and birds, and to reduce people's exposure to contaminated mud through net fishing, beach play, clamming or eating resident fish. The Lockheed Martin Corporation is responsible for cleanup of the property with oversight from the EPA. The estimated cost of cleanup is $48.1 million.
The final cleanup plan, also known as the Record of Decision or ROD, was signed on August 28, 2013. In May 2014, the EPA recognized that Tables 12 and 23 in the Record of Decision contained three transcription errors. As a result, an Explanation of Significant Difference was issued by EPA on February 12, 2015, correcting these mistakes.
The Lockheed Martin Corporation, as the Potentially Responsible Party for the cleanup, will remove contamination from a 40-acre area in the northwest corner of the mouth of the West Waterway and north of the Port of Seattle’s Terminal 5. An estimated total of 167,000 cubic yards of contaminated material will be removed over the course of the cleanup, reducing site risks to human health and the environment. Of that total, more than 151,000 cubic yards of sediment will be dredged from the sub-tidal area and an additional 15,800 cubic yards will be excavated or dredged from the shoreline and intertidal area.
Cleanup work begins mid-August of 2018 and will be done in the spring of 2019. For the cleanup, Lockheed Martin will:
Remove pilings and debris.
Dredge and dispose of sediments, pilings and debris at a permitted off-site landfill.
Add a thin layer of clean sand across the entire site to enhance natural recovery and cover dredged areas.
Continue the Washington State Department of Health fish advisory so people are aware of risks from eating contaminated seafood.
The fish consumption advisory, warning individuals not to consume contaminated resident seafood caught in the waterway, is in place. However, salmon are safe to eat since they only pass through Elliott Bay and do not live year-round in the bay.
Special advice for fish consumption in the Puget Sound, Elliott Bay, the Lower Duwamish River, and other rivers is available from the Washington Department of Health and King County.
When construction at the cleanup site is done, the EPA will monitor the site to ensure that the cleanup is effective. Monitoring will be conducted to support the EPA's Five Year Review process.