Dr. Jill Ryer-Powder, Principal Health Scientist, Environmental Health Decisions
Dr. Ryer-Powder is the Principal Health Scientist at Environmental Health Decisions providing expertise in the fields of toxicology, human health risk assessment, and product hazard evaluation. She received her Bachelor’s Degree in Nutrition from Cornell University, her PhD in Toxicology from Rutgers University, and did post-doctoral work at University of Southern California/ Children’s Hospital of Los Angeles. She brings more than 25 years of experience in litigation support, risk assessment, Proposition 65 evaluation, and occupational toxicology to human health hazard and evaluation projects. In her position, Dr. Ryer-Powder is responsible for strategic preparation, project management, and evaluation of chemical toxicity for risk assessment and product hazard evaluation projects. She is also involved in the investigation and analysis of legal and regulatory issues and controversial claims regarding chemical causation of diseases in humans. Her solid technical background, coupled with her frequent involvement in risk and hazard evaluation projects, gives her a broad perspective on the technical, economic and regulatory considerations for human health hazard evaluation work.
Dr. Ryer-Powder was a pioneer in the development of safe exposure levels for petroleum fuels and ammonia. She has extensively researched the toxicological issues surrounding human exposures to petroleum hydrocarbons, ammonia, and chlorinated hydrocarbons. In her experience in evaluating potential hazards from chemicals, she has worked extensively with USEPA Region IX, Cal/EPA Department of Toxic Substances Control, Los Angeles Regional Water Quality Control Board, San Diego Regional Water Quality Control Board, and Orange County Health Care Agency. Negotiations have involved presentation and approval of health risk assessments, health-based cleanup levels, and the setting of safe levels of exposure in the occupational and public arena.
Dr. Ryer-Powder has managed and performed more than 100 health risk assessments for local and national clients. Her site experience includes Preliminary Endangerment Assessment risk assessments, Proposition 65 evaluations, federal and state Superfund sites, Manufactured Gas Plant sites, RCRA sites, and Brownfields sites. She has prepared hundreds of Material Safety Data Sheets (MSDSs) and product labels for consumer and industrial products, including petroleum fuels, solvents, metals, fertilizers, pesticides, adhesives, and fabric protectors. She has worked with trade associations, private industry, and regulatory agencies to develop safe exposure levels to petroleum products and ammonia. She has presented results of risk assessments in public meetings. She has also provided expert testimony in cases involving exposure to metals, solvents, and petroleum hydrocarbons. Dr. Ryer-Powder has lectured on several occasions on the subject of risk assessment to students in the University of California system.