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Lower Duwamish Waterway
Source Control Investigation

Early Action Area 2:  Trotsky

SITE DESCRIPTION

Early Action Area 2 was identified as an area requiring sediment cleanup based on work conducted for the Lower Duwamish Waterway (LDW) Superfund site. This area is located on the western bank of the Lower Duwamish Waterway, just south of the First Avenue S. bridge in King County, Washington (see map). Early Action Area 2 consists of a small inlet, approximately 80 feet wide at its mouth and tapering to a narrow stream at its head.

Based on the results of sediment sampling conducted between 1991 and 2005, the following chemicals are potential contaminants of concern:

• PCBs
• Mercury
• Phthalates
• Lead
• Zinc

Ecology is the lead for source control for the LDW Superfund site. Source control is the process of finding and then stopping or reducing as much as possible releases of pollution to the river. Ecology looks at the drainage for Early Action Area 2 in order to determine what work needs to be done for Source Control. The Early Action Area 2 drainage basin outlines the area where sources need to be controlled (see map). The routes for contaminants to Early Action Area 2 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 Early Action Area 2 which describes what source control actions are necessary. Click here to view the Source Control Action Plan.  As part of the Source Control Action Plan, Ecology hired a contractor to put together a Summary of Existing Information and Data Gaps report. You can view this report here:

EAA-2 Summary of Existing Information and Data Gaps Report

Appendix A Site Photos (part 1)
Appendix A Site Photos (part 2)
Appendix A Site Photos (part 3)
Appendix A Site Photos (part 4)
Appendix B Sample Data
Appendix C Site Visit Report (part 1)
Appendix C Site Visit Report (part 2)
Appendix D Parcel Information

In May 2007, Ecology performed sampling to address some of the data gaps identified in the Summary of Existing Information Data Gaps report (listed above).  Investigation activities included sampling and analysis of subsurface soil, groundwater, seep water, stormwater outfall sediment and water, and intertidal sediment. 
 
Sampling results are available in the EAA-2 data report.  

Related Information

• Watershed Information for WRIA 15

Additional Resources

• Acronyms used by the Toxic Cleanup Program
• Cleanup Process: Major Steps & Definitions
• Data Submittal Requirements for All Cleanup Sites
• Facility/Site Atlas
• Toxics Cleanup publications