Innovative Solvent Remediation for Fortune 20 Manufacturer

  • Plume concentrations visualized via Geographic Information System technology.
EnSafe used a novel combination of routinely standalone treatment technologies to sustainably remediate chlorinated solvents at a site in the southeast. This sustainable remedy uses environmentally preferable products and requires minimal operations and maintenance.

    EnSafe implemented two technologies to treat chlorinated volatile organic compounds at a former manufacturing facility:

    • Micro-scale zero-valent iron (ZVI), hydrocarbon substrates, and nutrients
    • Emulsified oil zero-valent iron injections

    Substrate and ZVI injections — until recently typically implemented as standalone technologies — were combined to achieve synergistic reductions of tetrachloroethylene (PCE), trichloroethylene (TCE), and their reaction products.

    Thirty-eight injections were made over two days in both unsaturated and saturated zones. The groundwater results from three shallow monitoring wells inside the injection area showed a 30% reduction in dissolved concentrations of PCE and TCE within a year and 80% within two years.

    EnSafe’s innovation was featured in 2009 at Battelle’s Tenth In Situ and On-Site Bioremediation Symposium in Baltimore, Maryland.

    Services Provided

    • Passive soil-gas sampling
    • Collection of groundwater samples using innovative Membrane Interface Probe
    • Geological investigation
    • Hydrogeological investigation
    • Installation of groundwater monitoring wells
    • Data management and validation
    • Work plan development
    • Remedial action