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EA-1313: Final Environmental Assessment

Ground Water Compliance at the Monument Valley, Arizona, Uranium Mill Tailings Site

The U.S. Department of Energy (DOE) is proposing ground water compliance strategies for the alluvial and De Chelly aquifers at the Monument Valley, Arizona, Uranium Mill Tailings Radiation Control Act (UMTRCA) site. Although a compliance strategy is proposed for the De Chelly aquifer because of an isolated area of contamination, the focus of this environmental assessment (EA) is the alluvial (uppermost) aquifer. Pilot studies will be conducted for only the alluvial aquifer prior to implementation of the proposed compliance strategies.