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EVALUATION OF CENTRAL PLATEAU REMEDIATION ALTERNATIVES: INTERIM STATUS REPORT
Bagwell, C., A.R. Lawter, K.J. Cantrell, and C.F. Brown.
PNNL-28055, 34 pp, 2018

Several comingled groundwater contaminant plumes exist in the Hanford Central Plateau and are currently targeted by ongoing remedy efforts (i.e., pump-and-treat). However, across much of the Central Plateau, the deep vadose zone is also expected to serve as a long-term source of contaminant flux to the groundwater. Contaminant transport in the groundwater and vadose zone often occurs at vastly different time scales. Remedial action is needed in the near term to address existing groundwater contamination, but for some waste sites, long-term vadose zone source control may be needed. This report documents lab studies initiated in FY18 to evaluate gas-phase remediation approaches for the deep vadose zone and co-contaminant impacts on biological attenuation processes. https://www.osti.gov/servlets/purl/1489412



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