The groundwater at a former unregulated solid waste management unit was impacted by various chlorinated volatile organic compounds (CVOCs), mainly chlorinated ethenes. In February 2006, EHC® Reagent was injected into the gravel trenches to convert them into permeable reactive barriers (PRBs).
The groundwater at the site was impacted by TCE and its recognized anaerobic daughter products 1,2-DCE and VC. Using conventional direct push technology, 11,850 lbs. of EHC powder mixed with water were injected in situ into the gravel zone.
Trichloroethene (TCE) and cis-1,2-dichloroethene (cis-DCE) were decreased below the detection limit within the trenches after just 6 months. Subsequent monitoring 6, 9, 12 and 18 months post EHC injection showed almost complete removal of all CVOCs (97%-99% removal), without the accumulation of catabolites.