self-rescuers). He developed a curriculum and instructed college- and university-level courses associated with occupational health and respiratory protection, materials science and engineering, forensic science, and forensic chemistry. He has also served as a peer reviewer of technical reports and manuscripts for the Centers for Disease Control and Prevention, the National Institute of Occupational Safety and Health (NIOSH), the American Industrial Hygiene Association (AIHA) Journal of Occupational and Environmental Hygiene, and International Society for Respiratory Protection Journal. He received his Ph.D. in materials engineering (currently part of chemical engineering) with a minor in occupational and environmental health in May 1998 from the University of Pittsburgh.

Arthur T. Johnson is professor of bioengineering at the University of Maryland. His research interests are effects of respirator wear on human performance, exercise physiology, and respiratory monitoring. His teaching interest is engineering related to biological systems. He is the author of more than 100 peer-reviewed publications, 3 books, and 25 book chapters. He is currently president of the International Society for Respiratory Protection. He is a fellow of the American Institute for Medical and Biological Engineering, American Society for Engineering Education, American Society of Agricultural and Biological Engineers, Biomedical Engineering Society, and AIHA.

Virginia Lesser is director of the Survey Research Center at Oregon State University, where she also serves as associate professor in the Statistics Department. Her research interests are in sampling, survey methodology, environmental statistics, and applied statistics. She has written on nonsampling error, the effects of item and unit nonresponse on nonresponse error, and multiphase sampling. She holds a Ph.D. in biostatistics from the University of North Carolina and an undergraduate degree in biology.

James Platner is the associate director of the Center to Protect Workers’ Rights, which is the research and training institute of the Building and Construction Trades Department, AFL-CIO. Dr. Platner manages construction occupational safety and health research projects with a national academic consortium through a cooperative agreement with NIOSH. He has a B.S. in biophysics from Johns Hopkins, and an M.S. in radiation biology and a Ph.D. in toxicology and radiation biology from the University of Rochester School of Medicine. He is American Board of Industrial Hygiene certified in industrial hygiene. He also serves on the National Academy of Sciences standing Committee on Personal Protective Equipment for Workplace Safety and Health.

David Sarvadi is an attorney who works with clients in the areas of occupational health and safety, toxic substance management, pesticide regulation, employment law, and product safety. He represents clients before a variety of federal and state enforcement agencies in legal proceedings involving the Occupational Safety and Health Administration citations, U.S. Environmental Protection Agency Notice of Violations, Toxic Substances Control Act consent orders, Consumer Product Safety Commission Notices, Federal Insecticide, Fungicide, and Rodenticide Act Stop Sale Use and Removal Orders, and Equal Employment Opportunity Commission charges of discrimination. He works with clients in developing, reviewing, and auditing compliance programs in all of these areas, and in obtaining agency rulings on proposed or novel activities and questions, seeking interpretations of regulations as they apply to specific sets of facts. He has a background in occupational safety and health, having worked as an industrial hygienist for more than 15 years before he became a certified industrial hygienist in 1978. Prior to becoming an attorney, he was a principal in a small consulting firm and managed a corporate industrial hygiene and product safety program for a Fortune 500 company. Mr. Sarvadi received his B.S.-B.A. from Pennsylvania State University (1969), his M.Sc. from University of Pittsburgh Graduate School of Public Health (1970), and his J.D. from George Mason University (1986). Mr. Sarvadi is a member of the District of Columbia and Virginia Bars.

Bruce J. Tatarchuk is Ginn Professor of Engineering and director and founder of the Center for Microfibrous Materials Manufacturing, Department of Chemical Engineering, Auburn University, Alabama. His research involves ways to make fuel cells more efficient using microfibrous structures and the development of microfibrous structures to be used in the manufacture of respirators and other protective devices. More broadly, his research involves heterogeneous reactivity at solid surfaces.

Michael Weeks is a senior survey director at RTI. In his 35-year career in survey research he has successfully managed numerous survey projects ranging from small local studies to large national surveys. He is widely recognized as an expert project manager and has developed and taught seminars on the management of survey research projects at federal agencies, universities, private organizations, and professional conferences. He has conducted experiments on a variety of methodological issues in survey research and has reported his findings in numerous professional papers and publications. He has served on the Editorial Board of Public Opinion Quarterly and on two national advisory panels.


Thomas J. Plewes (study director) is a senior program officer for CNSTAT of the National Academy of Sciences. He previously served as study director for the National Academies’ Review of Research and Development Statistics

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