Characterization and Potential Remediation Approaches for Vadose Zone Contamination at Hanford 241-SX Tank Farm
Unplanned releases of radioactive and hazardous wastes have occurred at the 241-SX Tank Farm on the U.S. Department of Energy Hanford Site in southeast Washington State. Interim and long-term mitigation efforts are currently under evaluation for 241-SX Tank Farm. Two contiguous interim surface barriers have been designed for deployment at 241-SX Tank Farm to reduce future moisture infiltration; however, construction of the surface barriers has been deferred to allow testing of alternative technologies for soil moisture reduction and possibly contaminant source term reduction. Previous tests performed by other organizations at the Hanford Site have demonstrated that: vadose zone desiccation using large diameter (greater than 4 inch) boreholes is feasible; under certain circumstances, mobile contaminants may be removed in addition to water vapor; and small diameter (approximately 2 inch) boreholes (such as those placed by the direct push hydraulic hammer) can be used to perform vapor extractions. Evaluation of the previous work combined with laboratory test results have led to the design of a field proof-of-principle test to remove water and possibly mobile contaminants at greater depths, using small boreholes placed with the direct push unit.
- Research Organization:
- Hanford Site (HNF), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Management (EM) (United States)
- DOE Contract Number:
- DE-AC27-08RV14800
- OSTI ID:
- 1060387
- Report Number(s):
- WRPS-54371-FP-Rev.0; TRN: US1300280
- Resource Relation:
- Conference: WM2013 - Waste Management Symposia, Phoenix, AZ (United States), 24-28 Feb 2013
- Country of Publication:
- United States
- Language:
- English
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