Latest information on the Lower Duwamish

Ecology, EPA, King County, and the City of Seattle work continuously to    control sources of contamination to the Lower Duwamish Waterway (LDW). We post the latest source control information on this page, including reports and updates on work underway. 

Ecology receives Draft Remedial Investigation Report for Snopac Site

Ecology expects to receive the revised Draft Remedial Investigation Report for the Snopac Site on May 27, 2020. The partial cleanup activities on the site will to move forward in late May/early June while the overall site cleanup plan is developed.  A comment period for an Agreed Order and Interim Action Work Plan occurred in 2019. 

An updated version of The Preliminary Cleanup Level (PCUL) document is available with new chemicals and toxicity data.  The document is available in the list of electronic documents on Ecology's Lower Duwamish Waterway Site Page.  There is an Excel file with the PCUL values and a Word file with information about how PCULs are calculated and how to use them properly.


Ecology Is Holding a Public Comment Period for General Recycling Individual NPDES Permit

Ecology invites the public to review and comment on the proposed individual National Pollutant Discharge Elimination System (NPDES) permit for General Recycling of Washington LLC. The 30-day public comment period began on May 27, 2020.

The draft permit and fact sheet will be available online at the beginning of the comment period. Documents can be viewed at the Department of Ecology website: by entering the permit number WA0991006. Comments should be sent to

General Recycling owns and operates the T105 dock and material handling facility at 4260 West Marginal Way SW, Seattle, located on the western shore of the Duwamish River. Stormwater discharges from General Recycling have been authorized under an Industrial Stormwater General NPDES permit since April 1995 (permit numbers SO3002341 and WAR002341).  General Recycling installed chemical treatment enhancements in 2012 and has continued to add improvements to the treatment system.  In 2015, Ecology issued Administrative Order No. 10984 to require General Recycling to apply for an individual permit and to sample additional parameters. This proposed individual permit sets effluent limits, and requires toxicity testing and a PCB pollutant minimization plan.


Ecology’s Work and Covid-19 Impacts

We're following the Governor's directive to stay home and stay healthy. Accordingly, we are joining a statewide effort to slow the spread of coronavirus by having staff work from home. While continuing our work, we will do everything possible to keep people safe and to accommodate public participation.

Updates related to our business practices and any operational changes are listed on this page and will continue to be updated as information changes. We have up-to-date guidance and information for the regulated community and those who conduct business with us.

All Ecology buildings are closed to the public. Staff are available by telephone and email, but will not be available for walk-in service at headquarters, regional, and field offices until further notice.

  • Report a spill or environmental emergency by phone as normal to the regional office that serves your county.
  • Public records requests are still being accepted. However, Ecology staff will be unable to conduct in-person record reviews. Only electronic records are currently available. (See more information below.)
  • Visit our public input and events listing for updated information about public meetings.
  • We are not currently accepting payments in person. Please see our Make a payment page for details.
  • EPA closed the Manchester Environmental Laboratory. Any samples not already at the lab will not be able to be received.

For more information, see the statewide website: COVID-19/Coronavirus in our state.

Thank you for your patience and understanding as we work together to protect the health and well-being of all Washingtonians.



Información sobre la limpieza ambiental del Duwamish: Si le gustaría obtener este documento en español, favor de comunicarse con Gretchen Newman al 360-407-6097 o


Thông tin về công tác làm sạch môi trường Duwamish: Nếu quý vị muốn nhận tài liệu này bằng tiếng Việt hoặc cần thêm thông tin, xin liên hệ ông Liêm Nguyễn 360-407-6955, điện thư:


For more information on the US Environmental Protection Agency’s work in the Lower Duwamish Waterway, visit, where you can subscribe to their email listserv for periodic updates