Over the years, we have successfully treated thousands of sites impacted by hazardous contaminants around the globe. To search our case studies, please use the filters provided at the right or enter a search term such as type of site (e.g. dry cleaner) or location (e.g. Florida).
As featured in Remediation Journal, EHC Reagent was injected via direct push across the source area. Site specific challenges included a low permeability clayey lithology and a large degree of CVOC mass sorbed at the smear zone due to large variations in the groundwater table.
EHC® ISCR Reagent Chlorinated SolventsEHC 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 CT concentrations were reduced by 99.7%, with all monitoring wells meeting the groundwater clean up criteria.
EHC® ISCR Reagent Chlorinated Solvents Pesticides & HerbicidesThe EHC® PRB was installed as a line of direct push injection points across the width of the plume. Twelve years after the installation the PRB is still supporting >90% reduction in inflowing CT concentrations and the downgradient plume has reduced significantly in size and concentration.
EHC® ISCR Reagent Chlorinated SolventsAs featured in Remediation Journal, EHC® Reagent and KB-1® Bioaugmentation Culture were injected across the highest concentration area from approximately 40 to 112 ft bgs using direct push. Prior to treatment dissolved phase concentrations ranged as high as 592,000 and 90,000 μg/L for TCE and cis-DCE, respectively.
EHC® ISCR Reagent Chlorinated SolventsAs featured in Remediation Journal, EHC Reagent was emplaced via hydraulic fracturing into fine-grained sandstone to remediate TCE in groundwater.
EHC® ISCR Reagent Chlorinated SolventsEHC® Reagent was evaluated for treatment of soil containing volatile organic compounds (VOCs) and organochlorine pesticides (OCPs). The injections were conducted using hydraulic fracturing.
EHC® ISCR Reagent Chlorinated Solvents Pesticides & HerbicidesPerchlorate is a groundwater contaminant that is highly mobile and persistent in the environment. Current research indicates that both abiotic and biotic mechanisms support removal of perchlorate from groundwater. A bench-scale treatability study showed that greater than 99% removal of perchlorate from groundwater was achieved with EHC® Reagent, promoting both abiotic and biotic treatment mechanisms.
EHC® ISCR Reagent Chlorinated SolventsEHC® Reagent injected via direct push across the plume area impacted primarily by PCE and TCE.
EHC® ISCR Reagent Chlorinated SolventsEHC 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).
EHC® ISCR Reagent Chlorinated SolventsThe 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).
EHC® ISCR Reagent Chlorinated Solvents