Experience
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Herbicide Contamination and Source Attribution
Provided technical consulting support in a multi-party environmental dispute involving alleged herbicide contamination of an irrigation pond and damage to commercial nursery plants. The assessment focused on herbicides used for vegetation management at nearby solar facilities, utility corridors, and rights-of-way. The objective was distinguishing among multiple potential sources that could have resulted in contamination […]
PFAS Class Action Defense
Role Retained as a testifying expert by co-defendants in a PFAS class action. Provided independent scientific analysis and expert rebuttal. Worked with attorneys from several defense firms. Scope Evaluated whether evidence supported claims that PFOS, PFOA, 6:2 FTS, and other PFAS emissions from a single source caused city-wide impacts to soil, indoor air, and […]
Early Insight
Problem Statement Traditional environmental consulting company workflows delay early technical understanding of site conditions, forcing Case Teams to make decisions without a clear technical foundation. Traditional Processes Delay Strategic Understanding GIS and laboratory data digitization-first models postpone meaningful case analysis. Environmental consultanting companies focus on processing data, not synthesizing strategic insights. Valuable nuances that may […]
PFAS Fingerprinting – Appeal and Caveats
This video is meant for educational purposes; it presents simple PFAS fingerprinting scenarios; One involves two rivers and a fire training facility as a potential PFAS source. The goal is to identify the origin of PFAS detected in downstream surface water samples. A second scenario shows groundwater concentrations in monitoring wells, initially suggesting multiple sources. […]
Conceptual Understanding of PFAS Fractionation in Groundwater
This video explains why PFAS “chemical signatures” measured in groundwater can differ from place to place even when there is only a single contaminant source. The concept of PFAS fractionation (also referred to as PFAS enrichment) is a fundamental fate-and-transport process driven by differential sorption to organic carbon in aquifer materials. This microscale and macroscale […]
Review of $1.7 Billion Remediation Claim at RCRA Megasite
Independent forensic hydrogeology review of a large-scale groundwater remediation cost estimate prepared for a former industrial site. Why This Engagement Mattered Cleanup cost estimate exceeded $1.7 billion Cost driven primarily by assumed contaminant mass rather than measured conditions Required technical scrutiny beyond routine environmental review Scope of Review Examined conceptual site […]