ence in risk assessment and risk communication on projects in the United States and internationally. Her specific expertise includes exposure assessment, environmental health education, and biomonitoring for exposure to chemicals in the environment. She is currently serving on the NRC Subcommittee on Spacecraft Exposure Guidelines (SEGs) and served on the NRC Subcommittee on Submarine Escape Action Levels and the Subcommittee on Copper in Drinking Water. She received her Ph.D. in physiology and ecology from the Department of Zoology at the University of Washington.

ANNETTA WATSON is a senior research staff scientist in the Life Sciences Division of Oak Ridge National Laboratory (ORNL). She has been involved with the development of reference doses, acute exposure guideline levels (AEGLs), and other decision criteria for chemical warfare agents. Dr. Watson has also interpreted and applied toxicological information on hazardous materials to meet community emergency preparedness planning and training needs. She has served on numerous NRC committees, including the Committee on Toxicology, the Subcommittee on Toxicological Hazard and Risk Assessment, the Subcommittee on Guidelines for Military Field Drinking Water Quality, and the IOM Committee to Survey the Health Effects of Mustard Gas and Lewisite. She received a Ph.D. from the School of Agriculture at the University of Kentucky and an undergraduate degree in entomology from Purdue University.

CALVIN WILLHITE is a toxicologist employed by the California Department of Toxic Substances Control. Dr. Willhite was a member of the Chemical Substances Threshold Limit Values (TLV) Committee of the American Conference of Governmental Industrial Hygienists for ten years. Dr. Willhite currently serves on the editorial boards of the Journal of Toxicology and Environmental Health, Part B, Critical Reviews; Toxicology; Reproductive Toxicology; and Toxicology and Applied Pharmacology. He served on the NRC Committee on Toxicology and is a member of the NRC Subcommittee on Acute Exposure Guideline Levels, the NSF Health Advisory Board, and the National Toxicology Program Scientific Advisory Committee. He received his M.S. in toxicology from Utah State University and his Ph.D. in pharmacology from Dartmouth Medical School.