Andrew J.B. Cohen, PhD, PH

Westfield, New Jersey
Andrew J.B. Cohen, PhD, PH Expert Witness

Publications

Contaminant Hydrogeologist

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Specialties & Experience of this Expert Witness

General Specialties:

Environmental and Hydrology

Keywords/Search Terms:

PhD UC Berkeley, Certified Hydrologist, National Practice, PFAS AFFF PFOA PFOS, Benzene, Chlorinated Solvents, 1 4-dioxane, Forensic Analysis, Modeling, Visualization, Metals, Source Identification, Apportionment, Causation, Expert Rebuttal, vinyl chloride, Groundwater Contamination, Bedrock, Groundwater pollution, Hydrogeologist

Education:

PhD Environmental Engineering, University of California, Berkeley; BS Water Resources, University of New York, Oneonta

Years in Practice:

32

Additional Information

CONTAMINANT HYDROGEOLOGIST: Forensic Hydrogeology, Contaminant Fate and Transport, Site Remediation, Contaminant Source & Timing Analysis, Causation Reports & Rebuttals, Apportionment Analysis, PRP Identification, and Liability Allocation. Groundwater pollution, groundwater contamination, soil contamination, sediment contamination, surface water contamination. EXPERIENCE: 30+ years in consulting, litigation support, research, and teaching. ACADEMICS: PhD UC Berkeley; Research Associate, Lawrence Berkeley National Laboratory; Adjunct Professor LEAD AUTHOR of an internationally recognized book about groundwater fundamentals SPECIALITIES: Groundwater, soil, sediment, and surface water contamination; PFAS, AFFF, PFOA, PFOS, 1,4-dioxane, benzene, emerging contaminants, BTEX, chlorinated solvents (e.g., TCE, PCE, vinyl chloride), vapor intrusion, DNAPL, LNAPL, chromium, CERCLA, RCRA, Superfund, UST, spills, biosolids, landfill, leaching, bacteria, fractured bedrock hydrogeology, risk assessment, private wells, municipal water supply, 3D visualization, contamination modeling, teaching, presentations. CLIENTS: Fortune 500 companies, environmental attorneys, government agencies, and non-profit organizations. FOUNDER: GroundwaterU.org. WHY ME?: I provide forensic hydrogeologic analysis that dissects the data, reconstructs what actually happened, and presents the findings with courtroom-ready clarity. Whether you need a technical rebuttal, an expert report, or a full conceptual site model, I deliver work that challenges flawed science and holds up under scrutiny. My services include: • Contaminant Source & Timing Analysis • Causation Reports & Rebuttals • Class Certification Support & Apportionment Analysis • PRP Identification & Liability Allocation • Conceptual Site Model Development • Visual Aids & Custom Technical Animations • Deposition & Testimony Support I GO BEYOND INTERPRETATION: I uncover what others overlook: • Exposing conceptual and mathematical flaws in opposing expert reports • Reconstructing historical contaminant releases using forensic indicators • Challenging regulatory conclusions using subsurface data the agency ignored • Communicating complex dynamics through intuitive visuals and animations FULL DESCRIPTION & PORTFOLIO: https://experthydrogeologist.com