Source control areas
We have defined 24 source control areas around the Lower Duwamish Waterway. We work with the Source Control Work Group to control pollution sources like contaminated sites, stormwater, and combined sewer overflows within these areas.
We developed a Source Control Action Plan (SCAP) for each source control area. Each SCAP identifies potential contaminant sources and ways they may reach sediments. The plan evaluates the significance of these sources and their potential for recontaminating sediments, and identifies actions needed to control them. It also describes sampling and monitoring that will be conducted to identify any additional sources.
The Source Control Action Plan Handbook explains how we developed the SCAPs and why there are differences between earlier and later SCAPs and associated reports. It also discusses some of the challenges that were encountered during this process.
Below the map you can find the SCAP and related documents for each area. The Combined Sewer Overflow (CSO) Basins are being addressed under King County’s and City of Seattle’s CSO Control Plans.
West of the Lower Duwamish Waterway
Related links
Contact information
LDW Email
LDW@ecy.wa.gov
Brett Carp
Aquatics Unit Supervisor
Brett.Carp@ecy.wa.gov
206-594-0094
Ryan Gardiner
Source Control Project Manager
Ryan.Gardiner@ecy.wa.gov
425-681-5543
Kim Wooten, Ph.D.
Toxics Cleanup Program Regional Section Manager
Kim.Wooten@ecy.wa.gov
425-324-1658