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Department of Ecology News Release - August 3, 2016
EDMONDS – Final plans are nearly in place for the owner of a former fuel terminal near the Edmonds waterfront to clean up the site’s last two contaminated areas.
The Washington Department of Ecology seeks public review and comment on a minor change to the legal agreement for the cleanup and on a proposed water quality discharge permit for two cleanup projects. The two comment periods are taking place simultaneously through Sept. 6, 2016.
Ecology will review all comments before authorizing the planned work. Both projects are expected to begin this fall.
Completed cleanup projects
The Unocal Edmonds Bulk Fuel Terminal, at 11720 Unoco Road, operated from 1923 to 1991. Its owner, Union Oil Company of California (Unocal), a subsidiary of Chevron Corp., has conducted a series of site studies and cleanup projects since the facility closed. Ecology confirmed that the hillside site of a former tank farm met state cleanup standards in 2003. The Point Edwards Condominiums are now at that location.
Unocal plans two cleanup projects at a stormwater detention basin and near a Washington State Department of Transportation storm drain that crosses the site.
Unocal will install wells along about 400 feet of the WSDOT drain for a water treatment and vapor extraction system. Petroleum-contaminated water will be pumped from the ground, processed through treatment, and then discharged into Willow Creek, which runs adjacent to the site. The system also is intended to capture and treat petroleum vapors from the soil.
The system will remain in operation until groundwater and soil vapor conditions meet state cleanup standards. The current estimate for that process is approximately six years.
Next summer, Unocal will remove petroleum-contaminated soil from the half-acre detention basin area, and replace it with clean soil. The soil cleanup is expected to also address groundwater contamination at that location. The project will include a system to treat contaminated water from the excavation before discharging it into Willow Creek.
Follow-up testing of soil and groundwater will help Unocal and Ecology determine whether the site needs further cleanup.
Comments sought on two items
The amendment and permit do not change the planned cleanup projects from plans issued for public comment in 2015.
An Ecology fact sheet provides a site overview and additional details about the proposed cleanup projects.
Larry Altose, Ecology communications, 425-649-7009, @EcySeattle
David South, Ecology site manager, 425-649-7200
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