Oscar Hernandez, Ph.D.
Senior Regulatory Chemist

T: 202-557-3829
F: 202-557-3836
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B.Sc., Instituto Tecnologico y de Estudios Superiores de Monterrey (ITESM), Chemistry (Honors), 1970

Ph.D., University of Virginia, Chemistry, Organic Chemistry,1974

Post-doctoral Fellow, National Institutes of Health, 1974-1976

Post-doctoral Research, Mechanisms of Chemical Carcinogenesis and Polynuclear Aromatic Hydrocarbons, National Institute of Environmental Health Sciences, North Carolina, 1974-1976



Oscar Hernandez, Ph.D., Senior Regulatory Chemist with Bergeson & Campbell, P.C. (B&C®), is an exceptional resource for clients addressing chemical assessment and management issues under the Toxic Substances Control Act (TSCA) and other federal, state, and international chemical control authorities. Dr. Hernandez is the former Director of the Risk Assessment Division (RAD) in the U.S. Environmental Protection Agency's (EPA) Office of Pollution Prevention and Toxics (OPPT), where he managed a multi-disciplinary science group that provided expert scientific support in the areas of hazard and risk assessment of chemicals being reviewed pursuant to the regulatory programs OPPT implements.

During his 30-year career at EPA, Dr. Hernandez's chemical assessment activities included managing the TSCA Section 8(e) substantial risk reporting program; developing the initial HPV Challenge program and the subsequent development of Hazard Characterization documents; management of U.S. representation to the Organization for Economic Co-operation and Development's (OECD) Screening Information Data Set (SIDS); the Voluntary Children's Chemical Evaluation program (VCCEP); the Acute Exposure Guideline Levels (AEGL) program, a multi-agency program that generates air concentration levels for use by emergency response teams; Sustainable Futures, a program designed to help manufacturers develop new chemicals that are both economically and environmentally sustainable; assessment support to address national priority chemicals, including formaldehyde, lead, mercury, and perfluorinated chemicals; pioneering efforts in the assessment of nanomaterials; and more recently, the release of risk assessment documents of priority (Work Plan) chemicals.

Representative Engagements:

  • Contributed structure activity relationship (SAR) analysis and other technical support to address hazard and risk issues for a chemical submitted to EPA under the new chemicals and pesticides programs.
  • Assisted in the application of current understanding of toxicity mechanisms to develop arguments to support the appropriate hazard classification for an industrial chemical based on its toxicity mode of action.


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