Geniece Lehmann received her Ph.D in Toxicology from the University of Rochester. At present, she works as a toxicologist for U.S. EPA's Integrated Risk Information System (IRIS). IRIS is a human health assessment program that evaluates quantitative and qualitative risk information on effects that may result from exposure to environmental contaminants. Dr. Lehmann is currently working to develop a new IRIS assessment of the non-cancer health effects of polychlorinated biphenyls (PCBs).