Ian L. Pepper is currently the Chair of the Undergraduate Program in Environmental Sciences at the University of Arizona. He was recently named to Who's Who in America for the second year in a row, and in 1994 earned the Researcher of the Year Award in the College of Agriculture at the University of Arizona. In 1994 he was also named as a fellow to the American Society of Agronomy, and he became the Chair of the Soil Biology and Biohemistry Division of the Soil Science Society of America. Pepper is also a Fellow of the American Society of Microbiology, and has been a member of the Editorial Board of Applied and Environmental Microbiology for the past nine years. Pepper has also been the author or co-author of numerous published journal articles.Dr. Gerba has 30 years experience in the area of wastewater and waste recycling in agriculture. He has been involved in numerous projects on use of soil aquifer treatment for reuse of domestic wastewater for crop production, composting of domestic solid waste, use of wastewater for fish and shellfish aquiculture, surface water pollution and control from animal feeding operations, reuse of sewage sludge on farm land, and use of wetlands for recycling of animal waste. His expertise is in the area of pathogen fate and removal by treatment processes and risk assessment. He has served on numerous local, state, and federal committees and expert workshops for the development of standards and guidelines for the treatment and recycling of wastes to minimize environmental impacts. He was a member of the U. S. Environmental Protection Agency's Science Advisory Board for 8 years. He has organized and participated in workshops on food and water safety throughout the U.S. and Latin America. He has co-authored nine workshop training manuals.