South Park Marina
8604 Dallas Ave S, Seattle, WA 98108

South Park Marina
Please click on the photo for a larger view



Ecology negotiated a draft legal agreement (Agreed Order) to begin the process of cleaning up the South Park Marina site.  The work required under the Order is a site investigation (Remedial Investigation).  Parties to the Order include South Park Marina, LP, Seattle City Light, and the Port of Seattle. 

Ecology has completed a public comment period on the draft Agreed Order, along with a Public Participation Plan, for the Site. The comment period was held from December 10, 2018 - January 23, 2019. No comments were received. Ecology will therefore be signing the Agreed Order along with the other parties, making it final, and work will be going forward at the site.

You can view the Agreed Order and relevant documents by clicking links below, or on the "View Electronic Documents" page link to the right of this page.

Please click on the photo for a larger view


The South Park Marina is located at 8604 (and other addresses) Dallas Avenue South in South Park area of Seattle.  It is located on the west bank of the Lower Duwamish, immediately upstream from the South Park Bridge. The actual property is approximately two acres but size of the cleanup site is not yet known.
In the 1950s through the1960’s A & B Barrel used the site to clean and recondition barrels. The waste materials such as contaminated water was discharged to a small pond on the property, and then into the Duwamish River.

From the 1960s to the present day, the site was or is used to park cars, store and repair boats and conduct other activities associated with an active marina. All of these on site actions may have contributed to the contamination.  Activities conducted on the adjoining Terminal 117, Malarkey Asphalt site are also potential sources of contamination.

 Previous and ongoing investigation and monitoring activities include:
2005            Seattle Public Utilities (SPU) conducted soil sampling, Dallas Av. S 

2007            Ecology Toxics Cleanup Program conducted soil and ground water sampling

2008            Environmental Protection Agency (EPA) conducted sediment sampling in
                      Lower Duwamish Waterway

2014-15       Ecology conducted sampling drainage system solids and water associated 
                      with NPDES permit

2015-16       South Park Marina conducted some preliminary investigations

2018-2019    Public Comment Period for Agreed Order

2019-           Remedial Investigation of Site


Metals   - Arsenic, Cadmium, Copper, Chromium, Mercury, Lead, Zinc
Pesticides – aldrin, dieldrin
Chlorinated VOCs – 1, 2 and 1, 4 dichlorobenzene, PCE, TCE, vinyl chloride
Fuel VOCs – benzene, ethyl benzene, toluene, xylene

(Soil, Sediment, Ground Water, Drainage System Solids, and Stormwater)
For more information about these chemicals see the Agency for Toxics Substances and Disease Control  


Map showing site location as King County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 44653368

Cleanup Site ID: 2858

Seattle, King County

Status: Awaiting Cleanup   Get definitions of Status terminology

Mark Adams
Site Manager
(426) 649-7107

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

Document Repositories:

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