Environmental Exposure Expert Witness Paul Rosenfeld

Paul E. Rosenfeld, PhD, is an Environmental and Exposure Assessment expert with more than 26 years of experience evaluating human exposure. Dr. Rosenfeld's practice focuses on helping courts, attorneys, corporations, and governmental agencies understand technically complex environmental issues through scientifically rigorous investigations and objective expert opinions. His work combines environmental chemistry, engineering, exposure science, atmospheric modeling, hydrogeology, industrial hygiene, toxicology, epidemiology, and risk assessment to reconstruct historical environmental conditions and evaluate potential human exposures.

Litigation Support - Dr. Rosenfeld's opinions are based on established scientific methodologies, quantitative exposure models, peer-reviewed scientific literature, published technical methods, and reproducible calculations that can be independently evaluated and tested, providing a rigorous scientific foundation for expert opinions under Daubert and related standards for the admissibility of scientific evidence. He has authored and contributed to books and technical publications concerning environmental contamination, exposure assessment, and risk evaluation and has applied these scientific methods in expert reports, litigation, depositions, regulatory proceedings, and trial testimony.

Areas of Expertise:

Selected Judicial Recognition:

• US District Court for the District of Vermont Austin v. Monsanto Co. — Court upheld Dr. Rosenfeld’s exposure and risk-assessment methodology, including Average Daily Dose calculations, hazard quotients, EPA default assumptions, and statistically supported upper confidence limits (UCLs), finding the approach scientifically reliable and admissible.
• US District Court for the Southern District of Texas Cannon v. BP Products North America, Inc. — Court relied on Dr. Rosenfeld’s AERMOD-based air-dispersion modeling to delineate geographic exposure zones from refinery emissions and accepted his plume modeling and exposure methodology as scientifically reliable.
• US District Court for the District of Nebraska Gillett v. BNSF Railway Co. — Court found Dr. Rosenfeld qualified to offer opinions on historical diesel-exhaust exposure, environmental forensics, source attribution, and dose reconstruction, concluding his methodology was grounded in reliable scientific principles.

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