Now showing items 10-13 of 13

    • Ruth #1 Mine abbreviated preliminary assessment 

      Willamette National Forest (Agency : U.S.) (2004-10)
      After performing a preliminary assessment using a Niton XRF unit on waste rock dumps at the Ruth Mine, 8 miles northeast of Elkhorn, a site inspection was recommended because of the concentration of various elements, the ...
    • Ruth Mine initiation of CERCLA investigation memorandum 

      Willamette National Forest (Agency : U.S.); United States. Forest Service. Pacific Northwest Region (2005-02-23)
      Documents decision to initiate a CERCLA (Comprehensive Environmental Response Compensation and Liability Act) process after an abbreviated preliminary assessment found release of hazardous elements within the Ruth Mine #1 ...
    • Tillicum abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2003-02)
      Assesses mine site consisting of waste piles placed on moderate to steep side slopes. A Niton XRF unit found arsenic and lead exceeded EPA Region goals. Based on its proximity to Granite Creek, a Site Inspection is recommended.
    • Upper Central Mine abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2006-08)
      Assesses mine site on moderately steep side slopes consisting of four collapsed adits and about 1500cy of wasterock. A Niton XLt unit found most metals detected at the site exceeded screening criteria for birds, invertebrates, ...