Jeffrey Thompson, Ph.D., P.G., C.Hg.

Jeff has created numerous models of water and contaminant fate and transport to support his clients’ projects. He has applied rigorous technical methods to simulate scenarios ranging from comingled groundwater plumes to the vadose zone migration of soil fumigants, firefighting foams, and even human decomposition fluids. Jeff’s specific contaminant modeling experience includes per- and polyfluorinated substances (PFAS); 1,2,3-trichloropropane (TCP), trichloroethylene (TCE), perchloroethylene (PCE), perchlorate, lead, arsenic, nitrogen compounds, benzene, fuel oxygenates, and light non-aqueous phase liquids (LNAPLs). His computational expertise is supplemented by his understanding of statistical and geospatial analysis techniques, which together he has used to help stakeholders visualize and understand their environmental concerns.

As a project manager, Jeff has worked directly with client environmental managers to develop investigation and remediation strategies at complex cleanup sites, including those under Comprehensive Environmental Response, Compensation, and Liability Act (CERLCA), Resource Conservation and Recovery Act (RCRA), and California Title 22 regulations. Beyond providing innovative and cost-efficient solutions to environmental challenges, the cornerstone of Jeff’s site management approach is to build trust-based partnerships between his clients, regulators, and other project stakeholders.

As an exemplar, Jeff managed the RCRA corrective action response at the former Exide Technologies battery recycling facility in Vernon, California. Over the span on several years, Jeff cultivated a positive rapport with the California Department of Toxics Substances Control (DTSC) regulators by focusing on collaborative scientific discussions and identifying common-ground issues between DTSC regulators and Exide plant managers. At the time of Exide’s terminal bankruptcy, Jeff had garnered client and regulatory agreement on a one-year strategy for completing the onsite site investigation after eight rounds of remedial investigation spanning more than fifteen years.

Jeff is a testifying expert in the fields of hydrogeology and computational modeling including an ongoing Clean Water Act case involving the fate and transport of treated wastewater. Jeff has also worked extensively with client legal counsel as a confidential consultant. In this role, he has applied his intuitive understanding of the limitations and uncertainties inherent to the simulation of environmental contaminants to assess the technical validity of more than a half dozen computer models on behalf of counsel.

Contact Jeffrey Thompson at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1 562-257-1408.