Toxics Cleanup Program
Lower Duwamish Waterway
|Lead||Phthalates (butyl benzyl phthalate)|
|Tin||Volatile Organic Compounds (VOCs)|
|Arsenic||Semivolatile Organic Compounds (SVOCs)|
This site is located at 8801 East Marginal Way South, in Tukwila, Washington on the east bank of the Lower Duwamish Waterway. This site is bordered to the north by property owned by The Boeing Company, to the south by property owned by Container Properties, LLC (formerly the Rhone-Poulenc site) and the Museum of Flight Foundation, to the east by East Marginal Way South and to the west by the Lower Duwamish Waterway.
Ecology negotiated an Agreed Order to address the upland area of the site with PACCAR Inc and Merrill Creek Holdings LLC, the potentially liable parties (PLPs). Under this Agreed Order, the PLPs will update and implement an Interim Action Work Plan for the upland portion of the site.
Click here for more information on the 8801 East Marginal Way South site.
Ecology is the lead for source control for the LDW Superfund site. Source control is the process of finding and then stopping or reducing releases of pollution to the river. Ecology looks at the Slip 6 drainage basin to determine what sources need to be controlled (see map). The routes for contaminants to Slip 6 sediments include: direct discharges via piped outfalls, bank erosion from adjacent properties, surface runoff from adjacent properties, groundwater discharge, air deposition, and spills directly to the inlet.
Ecology developed a Source Control Action Plan for Slip 6 which describes what source control actions are necessary. As part of the Source Control Action Plan, Ecology hired a contractor to put together a Summary of Existing Information and Data Gaps report.
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