
The U.S. Environmental Protection Agency (EPA) added three mining-related sites to the National Priorities List (NPL) of Superfund sites this week. The sites include the Anaconda Aluminum Co.’s Columbia Falls Reduction Plant site, also known as the Columbia Falls Aluminum Co. (CFAC) site, in Columbia Falls, Montana, Colorado's Bonita Peak Mining District (BPMD) site and the Argonaut mine in California.
The law establishing the Superfund program, the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), requires the EPA to update the NPL at least annually and clean up hazardous waste sites.
“Listing on the [NPL] is an important step that enables the EPA to secure the necessary resources to investigate and address contamination concerns of San Juan and La Plata counties, as well as other downstream communities in New Mexico, Utah, and the Navajo Nation,” said EPA’s regional administrator.
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The CFAC site is located outside Columbia Falls near the south entrance of Glacier National Park. The CFAC plant operated between 1955 and 2009 and created significant quantities of spent potliner material, a federally listed hazardous waste, as a byproduct of the aluminium smelting process. A remedial investigation of the CFAC site is under way and is being completed by CFAC and its contractors.
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