Multiple EHC® PRBs for Treatment of Large Dilute Groundwater Plume at Former Manufacturing Facility in Southeastern US

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).

Products
Type of Site

Former Manufacturing Facility

Location

Southeast, USA

Contaminants Treated

Chlorinated Solvents

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).