The U.S. Department of Energy Hanford Site, formerly used for nuclear weapons production, encompasses 1500 square kilometers in southeast Washington State along the Columbia River. A principle threat to the river are the groundwater plumes of hexavalent chromium (Cr(VI)), which affect approximately 9.8 square kilometers, and 4.1 kilometers of shoreline. Cleanup goals are to stop Cr(VI) from entering the river by the end of 2012 and remediate the groundwater plumes to the drinking water standards by the end of 2020. Five groundwater pump-and-treat systems are currently in operation for the remediation of Cr(VI). Since the 1990s, over 13.6 billion L of groundwater have been treated; over 1,435 kg of Cr(VI) have been removed. This paper describes the unique aspects of the site, its environmental setting, hydrogeology, groundwater-river interface, riverine hydraulic effects, remediation activities completed to date, a summary of the current and proposed pump-and-treat operations, the in situ redox manipulation barrier, and the effectiveness of passive barriers, resins, and treatability testing results of calcium polysulfide, biostimulation, and electrocoagulation, currently under evaluation.
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ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management
September 25–29, 2011
Reims, France
Conference Sponsors:
- Nuclear Engineering Division and Environmental Engineering Division
ISBN:
978-0-7918-5498-3
PROCEEDINGS PAPER
Groundwater Remediation of Hexavalent Chromium Along the Columbia River at the Hanford Site in Washington State, USA Available to Purchase
Briant L. Charboneau
Briant L. Charboneau
United States Department of Energy, Richland, WA
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Dyan L. Foss
CH2M HILL, Richland, WA
Briant L. Charboneau
United States Department of Energy, Richland, WA
Paper No:
ICEM2011-59030, pp. 483-492; 10 pages
Published Online:
August 17, 2012
Citation
Foss, DL, & Charboneau, BL. "Groundwater Remediation of Hexavalent Chromium Along the Columbia River at the Hanford Site in Washington State, USA." Proceedings of the ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B. Reims, France. September 25–29, 2011. pp. 483-492. ASME. https://doi.org/10.1115/ICEM2011-59030
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