Tce plume remediation via ISCR-enhanced bioremediation utilizing EHC® and KB-1®

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Groundwater below an operating manufacturing facility in Portland, Oregon, was impacted bychlorinated volatile organic compounds (CVOCs), with concentrations indicative of a dense,nonaqueous-phase liquid (DNAPL) release. The downgradient plume stretched under the adjacentWillamette River, intersecting zones of legacy impacts from a former manufactured gas plant(MGP). An evaluation of source-area and downgradient plume treatment remedies identified in situbioremediation as most likely to be effective for the CVOC plume, while leaving the legacy impactsfor other responsible parties. With multiple commercially available products to choose from, theteam developed and implemented a bench test to identify the most appropriate technology, whichwas further evaluated in a field pilot study. The results of the testing demonstrated conclusively thatbioremediation enhanced by in situ chemical reduction (ISCR) using EHC® and KB-1® was mostappropriate for this site, providing outstanding results. The following describes the implementationand results of the tests. Oc 2008 Wiley Periodicals, Inc.

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