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

EVALUATION OF PERCHED WATER POST-EXTRACTION REMEDY TECHNOLOGIES: INTERIM STATUS REPORT
Saslow, S.A., M.M.V. Snyder, A.R. Lawter, L. Zhong, B.N. Gartman, K.J. Cantrell, et al.
PNNL-28054, 64 pp, 2018

Perched water at the Hanford 200-DV-1 Operable Unit contains elevated concentrations of uranium, technetium-99, and nitrate and serves as a future flux of contamination into the groundwater. A pumping system currently removes contaminant mass from the perched water zone, but contamination that remains after pumping needs to be addressed with post-extraction mitigation approaches along with appropriate monitoring and selection of a suitable remediation endpoint. This report documents candidate post-extraction remediation option evaluations initiated in FY18: (1) a sequential reductive and sequestration approach; (2) permeation grouts for immobilization; and (3) a quasi-3D cylindrical model calibrated against pumping tests to identify potential extraction enhancements for the current pump-and-treat system. In addition, an alternative method for stimulating calcite precipitation was investigated with the injection of CO2 gas. https://www.osti.gov/biblio/1485489-evaluation-perched-water-post-extraction-remedy-technologies-interim-status-report



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.