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Olson, M., W. Clayton, T. Sale, S. De Long, M. Irianni-Renno, and R. Johnson.
ESTCP Project ER-201587, 232 pp, 2017

This project focused on DNAPL source zone remediation using soil mixing with zero-valent iron and bentonite, a technology referred to as ZVI-clay soil mixing. In November 2012, the soil mixing technology was implemented in a TCE DNAPL source zone at Site 17, Naval Support Facility Indian Head, Maryland. Four years of remediation performance data indicate that TCE concentrations in soil and groundwater within the treated-soil zone had been reduced by up to four and five orders of magnitude, respectively. Groundwater concentrations in portions of the former-DNAPL source-zone approached MCLs within four years of soil-mixing completion. To assess post-remediation potential for TCE concentrations to rebound, as well as effects of remediation on natural fate and transport processes, high-resolution data representing both high-permeability and low-permeability soil strata were collected using cryogenic core collection. https://www.serdp-estcp.org/content/download/45611/425408/file/ER-201587%20Final%20Report.pdf

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