Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Superfund Record of Decision (EPA Region 6): United Nuclear Corporation, McKinley County, New Mexico, Groundwater Operable Unit (First Remedial Action) September 1988.
CORP Author Environmental Protection Agency, Washington, DC. Office of Emergency and Remedial Response.
Publisher 30 Sep 88
Year Published 1988
Report Number EPA/ROD/RO6-88/044;
Stock Number PB89-206171
Additional Subjects Site surveys ; Waste disposal ; Uranium ore deposits ; Tailings ; Ground water ; Cost analysis ; Metals ; Arsenic ; Radioactive materials ; Water pollution ; Radium 226 ; Radium 228 ; Mine wastes ; Superfund program ; Remedial action ; McKinley County(New Mexico) ; Radioactive wastes
Library Call Number Additional Info Location Last
NTIS  PB89-206171 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 12/18/1989
Collation 139p
The United Nuclear Corporation (UNC) site is located approximately 17 miles northeast of Gallup, New Mexico in McKinley County. The site operated as a State-licensed uranium mill facility from June 1977 to May 1982. It includes an ore processing mill (about 25 acres) and an unlined tailings pond area (about 100 acres). In July 1979, approximately 23 million gallons of tailings and pond water were released to a nearby river as a result of a dam breach in the tailings pond area. The site damage was repaired; however, attention was focused on ground water contamination resulting from tailings seepage. Nevertheless, the offsite migration of radionuclides and chemical constituents from uranium milling byproduct materials into the ground water, as well as to surface water and air, are still principal threats at the site. The remedial action will address onsite ground water contamination. Source control and onsite surface reclamation will be implemented under the direction of the Nuclear Regulatory Commission and integrated with this ground water operable unit. The primary contaminants of concern affecting the ground water are metals including arsenic, and radioactive substances including radium-226/228 and gross alpha. The selected remedial action for the site is included.