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Pacific Sound Resources

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Site Description

The Pacific Sound Resources (PSR) Superfund site is a former wood treating facility adjacent to Elliott Bay, on Terminal 5 in the Port of Seattle, WA. Wood was treated at the site from 1909 to 1994 using various treating solutions (creosote, pentachlorophenol, and metals). Soil and groundwater were impacted by these historic operations, and nonaqueous phase liquids (NAPL) are present in the subsurface.

Portions of the site are currently used by the Port of Seattle for Port operations, and other portions, particularly those areas with access to Elliot Bay, have been converted to a greenbelt and park, which are currently being used by the public. Current sediment capping work in the Marine Sediment Unit (MSU) occur on barges in Elliot Bay and do not disrupt park use except when operations are occurring close to the greenbelt.

The PSR Site is divided into two operable units: the Upland Groundwater Unit and the MSU.

Current Site Status and Cleanup Actions to Date

  • The Record of Decision (ROD), or cleanup plan, for the PSR site was signed on September 30, 1999. The ROD adopted previous early actions conducted at the site as the final Remedial Action for the Upland Groundwater Unit. Remedial work on the MSU is anticipated to be complete in February 2005, on-time and on-budget.
  • Cleanup actions have been completed to address threats posed by contaminated soil and groundwater and shallow NAPL in the Upland Groundwater Unit. Included in these actions were the installation of a subsurface containment wall and collection trench along the northern site perimeter and the placement of a low-permeability surface cap over the Upland Groundwater Unit.
  • A subsurface slurry wall was designed to minimize flow of contaminated groundwater to Elliott Bay and to reduce tidal influence on contaminant movement below ground surface. The purpose of the cap was to isolate contaminated soil and to reduce groundwater recharge.
  • An Inspection and Maintenance (I&M) program of monitoring, inspection, repair, and maintenance is in place to ensure the long-term structural integrity of the cap, groundwater quality, and DNAPL attenuation.
  • Remedial action is ongoing in the MSU and will be completed in February 2005. The selected remedial actions for the MSU include:
    • Capping 58 acres of contaminated marine sediments to isolate and stabilize them.
    • Dredging 10,000 cubic yards of contaminated sediment to allow for continued barge and tug access.
    • Removing approximately 800 unused pilings.
    • Implementing institutional controls to prohibit large anchor use in the cap area.

Current Funding Status

  • The total cost of approximately $35 million to clean up the PSR site has been contributed by either the PSR Environmental Trust or via in-kind work performed by the Port of Seattle.
  • Ongoing remedial action work in the MSU is fully funded via the PSR Environmental Trust and has already been allocated by EPA to the U.S. Army Corps of Engineers, Seattle District. The Corps, in concert with several private contractors, is responsible for completing work in the MSU at an anticipated cost of $15 million.

For more information on the projects at this site, please read the Pacific Sound Resources Fact Sheet on the Region 10 Superfund Web site.

Key Accomplishments

  • Upland portions of the site have been successfully cleaned up and returned to productive use as an operating area for the Port of Seattle and as a public greenbelt and park with water access for use by the public.
  • The total cost of approximately $35 million to clean up the Pacific Sound Resources (PSR) site has been contributed by either the PSR Environmental Trust or via in-kind work performed by the Port of Seattle.
  • Work in the Marine Sediment Unit (MSU) is anticipated to be complete in February 2005, on-time and on-budget.

 

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