U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Search Result

Baynes, P.A., V.A. Rohay, F.C. Elloy, S. Mehta, R. Hermann, and G. Ng.
WM2017: Waste Management Conference, March 5-9, 2017, Phoenix, Arizona. Paper 17151, 2017

The 2013 Record of Decision for the 300 Area of the Hanford site requires DOE to use phosphate to sequester uranium over a 1.2-ha area by applying phosphate to the highest uranium concentration areas of the vadose zone and the periodically rewetted zone using a combination of surface infiltration, periodically rewetted zone injection, and shallow aquifer injection. Due to the difficulties inherent in scale-up from a limited field test to a full-scale remedial action, it was determined that uranium sequestration would occur in two sequential stages. Stage A would treat a 0.3-ha area, while Stage B would treat the remaining 0.9-ha area. The purpose of Stage A, which was implemented in November 2015, was to test the phosphate application approach on a smaller area, refine the process based on the results, and then implement it in a larger area. This paper describes the Stage A uranium sequestration process (objectives, observations, and conclusions), the sampling and monitoring approach, the physical sequestration system, and recommended changes for Stage B. http://www.wmsym.org/archives/2017/pdfs/FinalPaper_17151.pdf

The Technology Innovation News Survey welcomes your comments and suggestions, as well as information about errors for correction. Please contact Michael Adam of the U.S. EPA Office of Superfund Remediation and Technology Innovation at adam.michael@epa.gov or (703) 603-9915 with any comments, suggestions, or corrections.

Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.