Queen City Farms | Region 10 | US EPA

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Queen City Farms

Site Information


Jannine Jennings
Remedial Project Manager
(206) 553-2724 or
toll-free at: 1-800-424-4372.

Cleanup Review Ongoing

We review cleanups at Superfund sites every five years, to make sure the cleanup continues to protect people and the environment. We will complete the next five-year review in 2013. After the 2008 review we began additional groundwater investigations (see
monitoring well location maps (PDF) (4 pp, 851K, About PDF)) to better characterize the groundwater contaminant plume; groundwater samples are collected twice a year to monitor the progress of the cleanup. The sampling results are available on request.

Site Summary

Queen City Farms is located on Cedar Grove Road (just south of King County Cedar Hills Landfill) in Maple Valley, Washington. The 324-acre Queen City Farms site includes two separate areas of contamination; the former waste pond and buried drum area in the eastern part of the property, and the former processing area in the center of the property. The processing area had relatively less contamination and the surface soils were removed to prevent contact with contaminated soil. Groundwater monitoring at this area of the site is conducted every five years. The main area of contamination was the result of buried drums and unlined ponds which were used to dispose of hazardous waste, including solvents, PCBs, and heavy metals. The start of the cleanup of this site involved an extensive removal action to properly dispose of the contaminated soil and sludge from the waste ponds. A barrier wall and a protective cap were used to contain the groundwater and soil beneath the former pond area. This area is now known as the Containment Area and contamination here is monitored regularly.

Technical Documents

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