This case study reviews a field-scale pilot test for in situ groundwater treatment of chlorinated volatile organic compounds (CVOCs) at high concentrations, in a fast-moving, aerobic aquifer beneath a residential neighborhood. The CVOCs were treated using a unique combination of remediation technologies, symbiotically promoting sorption-enhanced reductive dechlorination (ERD) via biotic and abiotic processes. Hamp, Mathews & Associates, Inc., a leading environmental consultant, enlisted REGENESIS to design and install an in situ PRB to fully treat the tetrachloroethene (PCE), trichloroethene (TCE), cis-1,2-DCE (cis-DCE), and vinyl chloride, converting them into nontoxic end products such as ethene, ethane, carbon dioxide, and chloride.

PlumeStop

Case study highlights:

  • A combined remedy approach using activated carbon and zero valent iron reduces risk of exposure to a residential neighborhood
  • PlumeStop permeable reactive barrier (PRB) demonstrated effective in eliminating contaminants in an extreme contaminant flux environment
  • Soil cores and groundwater samples confirmed consistent PlumeStop distribution in the in situ PRB