Reductive Dechlorination Using HRC Reduces VOCs Towards MCLs


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Site Summary

As part of the EPA Superfund Innovative Technology Evaluation (SITE) program, a pilot-scale study was conducted to determine the effectiveness of using HRC to reduce TCE concentrations in groundwater at the Fisherville Mill site in Grafton, MA. The Fisherville site is characterized by TCE contamination in a sand and gravel aquifer and is considered a brownfield site. Prior to HRC application, TCE contamination ranged from 290 to 1,600 ug/L. HRC was applied in June 2000. The HRC injection well array was installed downgradient of an existing monitoring well. Ten new monitoring wells were constructed downgradient of the HRC injection grid to track the progress of the pilot study. In addition to HRC, HRC Primer was used to produce an earlier onset of reductive dechlorination. HRC Primer is a faster release formulation of HRC intended to drive an anaerobic environment more quickly by reducing competing electron acceptors allowing for a potentially quick reduction of VOCs. The HRC material consisted of 40% HRC and 60% HRC Primer.

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