Forensic Expert Witness Services in Environmental Chemistry, Asbestos, PFAS, Air Modeling, Exposure and Dose Reconstruction, Risk Assessment, Toxicology, and Epidemiology

Science That Withstands Scrutiny

When complex environmental litigation depends on scientifically reliable evidence, Dr. Paul E. Rosenfeld and the RoseyFields team provide independent, evidence-based analyses grounded in accepted scientific methodology. For more than 25 years, our work has helped attorneys, corporations, government agencies, and communities understand historical environmental releases, reconstruct human exposures, evaluate contaminant migration, and assess whether the available scientific evidence supports or refutes claimed health effects.

Rather than relying on a single model or analytical approach, RoseyFields integrates environmental forensics, forensic dose reconstruction, exposure science, industrial hygiene, environmental chemistry, toxicology, epidemiology, engineering principles, and quantitative risk assessment to develop scientifically rigorous opinions tailored to the unique facts of each case. We apply the analytical tools and models most appropriate for the scientific questions presented, including air dispersion modeling, groundwater and drinking water modeling, chemical fate and transport analyses, historical emissions reconstruction, exposure pathway evaluation, statistical analyses, and contaminant source attribution.

Every opinion is built upon the best available scientific evidence, including peer-reviewed scientific literature, U.S. EPA methodologies, OSHA, NIOSH, ATSDR, CDC, state regulatory guidance, published exposure science, toxicological research, epidemiological studies, and accepted engineering and environmental science principles. We integrate multiple independent lines of scientific evidence to ensure that our conclusions are transparent, technically rigorous, and supported by established scientific knowledge.

Our work spans PFAS, asbestos, respirable crystalline silica, FELA and railroad exposures, benzene, ethylene oxide, petroleum hydrocarbons, dioxins, heavy metals, pesticides, PCBs, VOCs, SVOCs, industrial fires, groundwater contamination, drinking water systems, refineries, landfills, wood treatment facilities, manufacturing operations, transportation incidents, and emerging contaminants.

Our expertise routinely combines:

• Environmental Forensics
• Forensic Dose Reconstruction
• Occupational & Community Exposure Assessment
• Human Health Risk Assessment
• Industrial Hygiene
• Epidemiology & Toxicology
• Historical Emissions Reconstruction
• Air Dispersion Modeling
• Chemical Fate & Transport
• Groundwater & Drinking Water Modeling
• Exposure Reconstruction
• Environmental Chemistry
• Scientific Literature Evaluation
• Statistical Analysis

Our scientific methodologies have been evaluated in state and federal courts across the United States, and our opinions are developed with the expectation that they will be carefully examined through deposition, Daubert proceedings, and trial testimony. We are committed to applying the scientific method objectively, following the evidence wherever it leads, and communicating complex environmental science in a manner that is clear, understandable, and useful to attorneys, judges, juries, and regulatory agencies.

Independent Science. Transparent Methodologies. Defensible Opinions.