This case study reviews a contaminanted chlorinated solvent site in northern California where advanced design verification testing and predictive modeling methods were used to guide a remarkably successful in-situ remediation effort. Complete reduction of chlorinated volatile organic compounds (CVOCs) in the treatment areas and remedial objectives achieved allowed redevelopment of the property. The primary CVOC chemicals of concern were tetrachloroethene (PCE) and degradation products, trichloroethene (TCE), cis-1,2-dichloroethene (cis-DCE), and vinyl chloride (VC). PES Environmental, Inc. (PES) of Novato, California, was selected by the developer as their Environmental Consultant for this project. When PES engaged REGENESIS on this project, a better understanding of contaminant flux was needed. By understanding the contaminant flux, a cost-effective remediation plan could be designed, specifically engineered to achieve a project goal. In this case, the goal was to fully remediate the CVOCs in the target treatment areas within two years following application of the treatment approach.

Case study highlights:

  • Design Verification Testing (DVT) from REGENESIS contributes to achieving remediation goals
  • Flux-based predictive modeling used to optimize remediation to meet two-year timeline
  • Highly successful remediation solution using colloidal technologies paves the way for property redevelopment