Portable XRF to Guide a Groundwater Source Removal Action at the Cañon City, CO, USA Uranium Mill
The Cotter Corporation began uranium ore milling in 1958 at the Cañon City Uranium Mill in Cañon City, Colorado, USA. Over the years, uranium (U) and molybdenum (Mo) leached from the tailings and impacted the shallow groundwater which eventually migrated off site. In 2008, the S.M. Stoller Corporation (Stoller) performed a source removal action by remediating 225,000 cubic yards (CY) of contaminated soil from the former settling pond that was a potential source of Mo and U groundwater contamination. Stoller used portable X-ray fluorescence (XRF) to provide real-time data that reduced the amount of soil required to be removed by 30%. This paper examines the process by which the sampling was designed, the statistical analysis, and the lessons learned.
KeywordsLateral Extent Alternative Assessment Settling Pond Excavation Area Cleanup Standard
- EMS (Engineering Management Support, Inc.) Alternatives Assessment Old Ponds Area, Cotter Canon City Mill Site, originally prepared September 9, 2004, and revised March 17, 2005.Google Scholar
- EPA (U.S. Environmental Protection Agency), 1986. Test Methods for Evaluating Solid Waste, SW-846: Physical/Chemical Methods, Volume II: Field Methods, 3rd Edition, Office of Solid Waste and Emergency Response. Washington, D.C.Google Scholar
- EPA (U.S. Environmental Protection Agency), 1999. USEPA Contract Laboratory Program National Functional Guidelines for Organic Data Review. EPA540/R-99/008.Google Scholar
- PNL, Visual Sampling Plan (VSP), Version 2, Pacific Northwest Laboratory, Contract DE-AC06-76RL01830.Google Scholar
- TQEM, Canon City Milling Facility Total Quality Environmental Management Project Summary Report, prepared by Cotter Corporation, Colorado Radiation Control Division, and U.S. Environmental Protection Agency, November 1995.Google Scholar