Dr. Ann  Blake presented at the International Symposium on Alternatives Assessment: Advancing Science and Practice conference, held at the Natcher Conference Center of the National Institutes of Health in Bethesda, Maryland on March 5 and 6, 2015. Dr. Blake’s presentation, Exposure Characterization in Alternatives Assessment, was part of the panel titled Advancing the Practice on Hazard Assessment and Exposure Characterization. Dr. Blake’s fellow panelists included Dr. Meg Whittaker of ToxServices, and discussants Cal Baier-Anderson of US EPA and Helen Holder of Hewlett-Packard.