EHC was injected into a series of permeable reactive barriers (PRBs) across the plume with the goal to treat the entire plume area over time. After only 6 months following the installation of the EHC PRBs, CT concentrations were reduced from a maximum of 260 ppb to 0.8 ppb (99.7% removal), with all monitoring wells meeting the groundwater clean up criteria for all chlorinated volatile organic compounds (CVOCs).
Groundwater at a former manufacturing facility was impacted by chlorinated solvents, primarily carbon tetrachloride (CT) and trichloroethylene (TCE), as well as organochlorinated pesticides (OCPs). EHC® Reagent was injected into a series of permeable reactive barriers (PRBs) across the plume with the goal to treat the entire plume area over time. After only 3 months of EHC application, the CT concentration decreased from 260 ppb to 7.8 ppb (97% removal) without the accumulation of catabolic intermediates. Treatment improved further at the 6-month sampling, showing a removal to 0.8 ppb (99.7% removal). All six of six monitoring wells met the groundwater clean up criteria for volatile organic compounds (VOCs).