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Public Notice: EPA begins review of cleanup at Midway Landfill Superfund Site in Washington

EPA begins review of cleanup at Midway Landfill Superfund Site in Washington
How to Comment
Comments Due
July 31, 2025

Your feedback is welcome. If you have observations, information, or concerns about EPA’s review, please contact Ashley Grompe (grompe.ashley@epa.gov), 206-553-1284.

Or by mail:
EPA Region 10
Attn: Ashley Grompe
1200 Sixth Avenue, Suite 155 (MS 12-D12-1)
Seattle, WA 98101 

Please provide input by July 31 to be considered in our review.

Publish Date
June 25, 2025

Summary

EPA's fifth review of the environmental cleanup at Midway Landfill – a Superfund site in Kent, Washington – is underway. EPA must review Superfund sites every five years when contaminants remain on site to ensure the cleanup continues to protect human health and the environment.

The city of Seattle landfill accepted demolition materials, wood waste, and industrial wastes from 1966 to 1983. Landfilling activities contaminated groundwater and air with hazardous chemicals.

The cleanup for the Midway Landfill included gas and stormwater control, capping, and institutional controls. The cleanup was completed in 1992 and groundwater monitoring is ongoing.

Much of the landfill area remains undeveloped besides the Federal Way Link Extension rail which has been constructed on the east perimeter.

For more information about the site, visit Midway Landfill Superfund Site.

For alternative formats or languages

If you need materials in an alternative format or language, please contact EPA Community Involvement Coordinator Laura Knudsen (knudsen.laura@epa.gov), 206-643-4299.

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Last updated on June 25, 2025
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