DAVID A. VACCARI, PhD, PE, is an Associate Professor in the Department of Civil, Environmental, and Ocean Engineering at Stevens Institute of Technology, New Jersey. He also serves as an industry consultant and holds memberships in the Water Environment Federation, the American Academy of Environmental Engineers, the International Water Association, and the American Water Works Association.

PETER F. STROM, PhD, is a Professor of Environmental Sciences at Cook College, Rutgers University, specializing in biological treatment and water pollution. He is a member of the Water Environment Federation, the American Society for Microbiology, the Association of Environmental Engineering and Science Professors, and the International Water Association.

JAMES E. ALLEMAN, PhD, PE, is a Professor and Departmental Chair of Civil, Construction, and Environmental Engineering at Iowa State University. His thirty plus years of environmental engineering experience covers a diverse spectrum of academic, industrial, military, and governmental activities. He is a member of the American Society of Civil Engineers, the Water Environment Federation, the International Water Association, and the Association of Environmental Engineering and Science Professors.