Ms. Verwiel has more than 20 years of experience in environmental consulting in the areas of human health risk assessment, site assessment, and environmental regulation. Over her career, she has focused on integrating risk assessment into an overall risk management approach to problem definition, investigation, and mitigation. She has successfully applied this approach in negotiations with regulatory agencies and public groups to develop cost-effective investigations, assessments, and mitigation strategies. She has also studied the science behind using cumulative impact assessments to assess health conditions in vulnerable communities. She has published and presented papers on a wide variety of topics, including bioaccessibility, regulatory risk assessment, environmental justice, probabilistic risk assessment (Monte Carlo analysis), environmental fate and transport of contaminants, and environmental auditing.
Ms. Verwiel has managed and conducted numerous human health risk assessments that addressed a wide variety of chemicals in soil, soil vapor, air, and groundwater. Petroleum, aerospace, electronics, mining, and MGP sites are among the most common sites for which she has performed these risk assessments. She has evaluated the chemical signatures, transport mechanisms and ultimate fate, and likely current and future human exposures as key first steps in the health risk evaluation. She has worked to develop investigation strategies and assess exposure to indoor and ambient air, which included evaluating air emission sources, modeling, soil vapor measurements, vapor intrusion, and indoor/ambient air measurements.
Ms. Verwiel has a detailed understanding of a broad cross section of environmental regulations, which she has applied to regulatory impact analyses, environmental compliance, and training programs. She has evaluated potential impacts of new regulations on operating facilities and new developments, assessed compliance with a wide variety of environmental regulations at operating facilities, and developed training materials to help regulatory agencies establish their requirements clearly and help regulated entities comply. She has worked throughout her career on programs specific to California, including California Proposition 65, the AB2588 Toxic “Hot Spots” Act, CalEnviroScreen, and the California Environmental Quality Act (CEQA).