Using OxyZone® on Chlorinated Volatile Organics
at a Dry Cleaner Site
at a Dry Cleaner Site
Highlights
In-situ chemical oxidation (ISCO) using OxyZone® has been used to bring sites with persistent and recalcitrant contaminants to closure. In this case study, OxyZone®, in combination with a soil vapor extraction system (SVE), was demonstrated to eliminate chlorinated volatile organic compounds (CVOC) and Tetrachloroethylene (PCE) at a commercial dry cleaning site.
Site Details
Site: Dry cleaner at shopping mall, Massachusetts
Contaminant: CVOC and PCE Geology: sand, gravel and dense clay under building
Challenge: Meet regulatory standards for indoor air exposure and CVOC in groundwater
Remediation: SVE and OxyZone® ISCO process
Background
In-situ chemical oxidation (ISCO) using OxyZone® has been used to bring sites with persistent and recalcitrant contaminants to closure. In this case study, OxyZone®, in combination with a soil vapor extraction system (SVE), was demonstrated to eliminate chlorinated volatile organic compounds (CVOC) and Tetrachloroethylene (PCE) at a commercial dry cleaning site.
Results
EnChem Engineering designed and installed a combined SVE/sub-slab depressurization system that eliminated the Imminent Hazard within two months of operation. OxyZone® ISCO was implemented to remediate the source and prevent offsite migration of contaminants.
The SVE/sub-slab depressurization system was successful in reducing indoor air samples to below the commercial/industrial threshold values. OxyZone® ISCO has eliminated off-site migration of PCE to below regulatory standards. Concentrations of PCE in groundwater within the source area have been reduced to below or slightly above regulatory standards within three years of treatment.
