E.P.A. Issues Final Cleanup Decision for Midnite Mine Superfund Location
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Category: Hazardous WasteType: News
Source: EPA
Date: Tuesday, October 3rd, 2006
(Seattle, Washington - Oct. 3, 2006) - The U. S. E.P.A. Region ten (EPA) has selected a final cleanup project for the Midnite Mine Superfund Location near Wellpinit, Washington The Record of Decision (ROD) was signed by EPA's regional superfund director Dan Opalski in Seattle.
The Midnite Mine Superfund Location (Site) is an inactive open-pit uranium mine located on the Spokane Indian Reservation in eastern Washington, approximately 45 air miles northwest of Spokane. Uranium mining from the mid-50s through the early 80s left 2 open pits, piles of uranium-bearing rock at the surface, and an area of waste-filled pits. The ROD serves as a legally enforceable framework and roadmap for actions that will be taken to reduce potential health risks at the Location
According to Dan Opalski, Director of EPA's Region ten Office of Environmental Cleanup in Seattle: "After a thorough analysis of options, we believe we've arrived at the best solution for a tough problem. We can't erase 25 years of mining impacts, but this cleanup will protect the health of the community and the surrounding environment."
The ROD addresses all contaminated materials at the Site. This includes waste materials in the 350 acre mined area and mining-affected groundwater, surface water, soils, and sediments. Specifically, final cleanup includes actions such as:
- Engineered containment of above-grade mine waste in the 2 open pits, Pit three and Pit 4.
- Construction of a soil cap over waste contained in Pits three and 4, and over waste in a previously backfilled pit area.
- Removal and treatment of water that enters Pit 3, Pit 4, and the Backfilled Pit Area.
- Continued collection and treatment of contaminated seeps.
- Design and construction of a replacement water treatment plant.
- Long-term discharge of treated water to the Spokane River Arm (of Lake Roosevelt) under a future NPDES permit.
E.P.A. released a suggested project seeking public review on October 5, 2005. The review period ended on January 18, 2006, following 2 meetings held to present information to community members and accept oral comments.
As part of the Superfund Process, E.P.A. will conduct a review every 5 years to make sure that the cleanup continues to be effective.
The Record of Decision and other key plan documents are accessible on the E.P.A. website at:
http://yosemite.epa.gov/R10/CLEANUP.NSF/sites/Midnite
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