Enhanced CAH Dechlorination using Slow and Fast Releasing Polylactate Esters

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Courtesy of REGENESIS

In the mid-1990s, CDM began aggressive discussions with the regulatory agency to reduce regulatory and operational requirements at two sites in Santa Clara, CA -- TR W Microwave and Anadite Santa Clara. Both sites began using
tetrachloroethene (PCE) and trichloroethene (TCE) in manufacturing activities in the mid-1960s. Soil and groundwater were contaminated with PCE, TCE, and daughter products [cis-1,2-dichloroethene (DCE) and vinyl chloride (VC)]. At both sites, CDM evaluated several innovative remedial alternatives - monitored natural attenuation, chemical oxidation, and enhanced anaerobic biodegradation (EAB). CDM successfully implemented EAB at both sites,
resulting in shutdown of the groundwater extraction and treatment (GWET) system at TRW Microwave and eliminating the need to install a GWET system at Anadite Santa Clara. These remedial actions resulted in significant cost savings to facility owners. For example, at TRW Microwave, annual operations, maintenance, and monitoring (OM&M) costs were reduced by over 75%.

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