Groundwater was is impacted with chlorinated solvents (primarily PCE, TCE and 1,2-DCE). A pilot test was first conducted in Nov 2011 by injecting EHC® Liquid reagent into the shallow aquifer.
PCE and TCE concentrations were reduced to concentrations below the GWQS within 9 months following the pilot-scale treatment.
Holmdel, New Jersey
PCE, TCE and 1,2-DCE
Groundwater was is impacted with chlorinated solvents (primarily PCE, TCE and 1,2-DCE). A pilot test was first conducted in Nov 2011 by injecting EHC® Liquid reagent into the shallow aquifer.
The downgradient portion of the area of interest was to be addressed with EHC Liquid, an in situ chemical substrate to promoting biotic and abiotic reduction of CVOCs with a possible addition of a buffer to raise the pH of the acidic aquifer.
PCE and TCE concentrations were reduced to concentrations below the GWQS within 9 months following the pilot-scale treatment.
The objective of this pilot test was to demonstrate flux reduction of TCE downgradient of an EHC® Liquid permeable reactive barrier (PRB). The flux calculations demonstrated a 73% reduction in 8 months. Advanced techniques such as real-time monitoring, microbial characterization and diagnostics and hi-res imaging were used to characterize and track remedial progress.
A relatively stagnant groundwater plume of PCE presents a vapor intrusion risk to the existing dry cleaning facility and adjacent businesses. Evidence of complete reductive dechlorination of PCE was observed over a relatively short time period and Dhc inoculation appears to have been successful.
The objective of the project was to demonstrate the efficacy of EHC® Liquid Injections for treatment of residual TCA and DCE contamination with limited access beneath the building and to reduce contaminant mass in the deeper saturated zone (20-25 ft bgs).
