addition to her extensive program management experience, Dr. Whittaker has extensive technical experience in hazard identification and noncancer and cancer dose-response assessment, including quantitative risk assessment (e.g., benchmark dose modeling for both carcinogens and noncarcinogens). She has worked at two of the country’s leading toxicology and risk assessment consulting firms (the ENVIRON Corporation and the Weinberg Group). Dr. Whittaker has over a decade of experience evaluating health hazards and quantitating human health risks for low-level contaminants in drinking water, pharmaceuticals, medical devices, cosmetics, and food additives. She is a Diplomat of the American Board of Toxicology (D.A.B.T.). Dr. Whittaker earned a Ph.D. in toxicology from the University of Maryland, Baltimore, and an M.P.H. in environmental health from the University of Michigan.

Dale Whittington is professor of environmental sciences and engineering, city and regional planning, and public policy at the University of North Carolina, Chapel Hill. Since 1986, he has worked for the World Bank and other international agencies on the development and application of techniques for estimating the economic value of environmental resources in developing countries, with a particular focus on water and sanitation and vaccine policy issues. Dr. Whittington has published extensively on cost-benefit analysis, environmental economics, and water resources planning and policy in developing countries. His current research interests include the development of planning approaches and methods for the design of improved water and sanitation systems for the rapidly growing cities of Asia. Dr. Whittington received his A.B. at Brown University, his M.P.A. at the University of Texas, his M.Sc. at the London School of Economics and Political Science, and his Ph.D. at the University of Texas.


Stephanie E. Johnson, study director, is a senior program officer with the Water Science and Technology Board. Since joining the NRC in 2002, she has served as study director for twelve studies on topics such as desalination, water security, Chesapeake Bay nutrient management, and Everglades restoration progress. She has also worked on NRC studies on contaminant source remediation, the disposal of coal combustion wastes, and coalbed methane production. Dr. Johnson received a B.A. from Vanderbilt University in chemistry and geology and an M.S. and a Ph.D. in environmental sciences from the University of Virginia.

Sarah E. Brennan is a senior program assistant with the Water Science and Technology Board. Since joining the NRC in 2010, she has worked on five projects including Everglades restoration progress, U.S. Army Corps of Engineers’ water resources, and water and environmental management in the California Bay Delta. Before joining WSTB, Ms. Brennan was a Peace Corps Volunteer in Ghana, West Africa. She received her B.S. in International Development from Susquehanna University.

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