Publication Summary

The Lower Duwamish Waterway (LDW), located in Seattle, Washington, was added to the U.S. Environmental Protection Agency (EPA) National Priorities List (Superfund) on September 13, 2001. Section 1 of this Action Plan provides background information about the LDW site and EAA-7, including the source control strategy and participating agencies. Section 2 provides a description of the site and a discussion of the chemicals of concern for EAA-7 sediments, which consist primarily of PCBs, phthalates, PAHs, and hexachlorobenzene. It should be noted that although this Action Plan focuses on these chemicals of concern, other chemicals that could result in sediment recontamination will be addressed in the source control process as sources are identified. Section 3 provides an overview of potential sources of contaminants that may affect EAA-7 sediments, including piped outfalls, spills, properties adjacent to EAA-7, and upland properties. Section 3 also describes actions planned or currently underway to control potential sources of contaminants. Sections 4 and 5 describe monitoring and tracking/reporting activities, respectively.