Superfund Information Systems: Site Profile

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EPA works in cooperation with the Montana Department of Environmental Quality, Exit the U.S. Forest Service, and other state and federal agencies for cleanup work at the site.

The site consists of three areas, referred to by EPA as operable units (OUs) and defined in Site Status. Cleanup at this site uses two approaches:

  1. Removal actions are used to expedite cleanup of the most immediate threats to human health and the environment. The cleanup approach using removal authority is documented in Action Memoranda:
  2. A longer term remedial program is being implemented to assist in determining the nature and extent of contamination and selecting cleanup alternatives.
    • For OU1, a Record of Decision (PDF) (274 pp, 39.5 MB, About PDF) was issued in 2009.
    • For OU2, a remedial investigation (RI) is ongoing that will determine the nature and extent of contamination. A final OU2 RI report is expected in 2017.
    • For OU3, draft reports for a site-wide RI and a feasibility study are currently being evaluated and final drafts of both reports are expected in the spring 2018.

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