Snopac Property
5055 E Marginal Way, Seattle, WA 98134

Snopac Property - aerial view
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​Ecology negotiated a legal agreement called an Agreed Order with 5055 Properties LLC, the Potentially Liable Party (PLP) for the Snopac Property (Site). The order requires them to investigate environmental conditions, develop a cleanup plan, and conduct an interim cleanup.

Ecology hosted a public comment period from June 10 - July 9, 2019 to get input on the Agreed Order and other documents for the Site:

Agreed Order – requires the PLP to investigate contamination, complete a Remedial Investigation (RI), Feasibility Study (FS) and draft Cleanup Action Plan (dCAP) for the Site.
Interim Action Work Plan – describes how the PLP will conduct a partial cleanup of the contaminated soil present in the upland portion of the Site.
Public Participation Plan – describes how Ecology will inform the community about Site activities and opportunities to be involved in the cleanup process.

Community Open House
Ecology, the Environmental Protection Agency (EPA), and the Duwamish River Cleanup Coalition (DRCC) hosted an open house for the community, which included information about the Snopac Property Site, as well as other sites we are working on in and around the Lower Duwamish Waterway. See highlights here.

Ecology did not receive any comments that warranted significant changes to the documents, so they were finalized and the cleanup process is now moving forward.

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The Snopac Property is located at 5055 East Marginal Way S. in Seattle. It is approximately 1.3 acres on the east bank of the Lower Duwamish Waterway (LDW), at the head of Slip 1. Olympic Lighterage Company, operated there from 1935 to 1940. Pioneer Towing Company occupied the buildings and utilized underground storage tanks (USTs) from 1940 through 1970. Marine Power & Equipment utilized the warehouse for marine equipment storage and disposed of spent sandblast grit (SBG) on the Site between 1973 and 1986. Snopac Products Inc. operated a fish packing facility in the building from 1992 to 2008. In 2008 they relocated the business, leaving the property and warehouse vacant. 5055 Properties LLC purchased the property in 2012.

​During the 1970’s and 1980’s portions of the Site were filled with SBG, which contributed to contamination in the LDW. Soil samples at the Site contained concentrations of arsenic, copper, lead, zinc, tributyl tin (TBT), carcinogenic polycyclic aromatic hydrocarbons (cPAHs), and polychlorinated biphenyls (PCBs). Groundwater samples contained metals (arsenic, chromium, copper, nickel) and PAHs. Sediment sampling conducted in the vicinity of the Snopac property found metals, PAHs, and PCBs. A sample from groundwater entering Slip 1 on the southwest corner of the property found arsenic, copper, lead, mercury, and zinc.
All of these contaminants were found at levels that exceed allowable standards under the state’s cleanup law, the Model Toxics Control Act (MTCA) and therefore must be addressed.

Why this site matters
The LDW Superfund Site includes a 5-mile stretch of the Duwamish River that flows north into Elliot Bay. The U.S. EPA added the LDW Superfund Site to the Superfund National Priorities List in 2001. EPA is leading efforts to clean up the river sediments. Ecology is leading efforts to stop or reduce sources of pollution to the LDW Superfund Site so that the sediment cleanup can proceed, a task commonly known as “source control”. The long-term goal for source control is to minimize recontamination of the river sediments above the limits established by EPA.

Due to its proximity to the river, understanding how much contamination the Site is contributing to the LDW is an important step for source control. Contaminants in the soil and groundwater near the river may pose a risk to human health and the environment. They can also find their way into the river through storm runoff and other pathways. The sediments in the river contain a wide range of contaminants due to decades of industrial activity and runoff from urban areas.


Map showing site location as King County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 1523145

Cleanup Site ID: 12463

Seattle, King County

Status: Awaiting Cleanup   Get definitions of Status terminology

Sandra Matthews
Site Manager
(425) 649-7206

Brad Petrovich
Project Planner and Public Involvement Coordinator
(425) 649-4486

Document Repositories:

Northwest Regional Office
3190 160th Ave SE
Bellevue, 98008-5452