1. Civil Designer, CFA, Inc., Reno, NV 89502; formerly, Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Nevada Reno, Reno, NV 89557-0152.
2. Senior Engineer, Water Quality Division Greater Cincinnati Water Works, Cincinnati, OH 45228; formerly, Director of Research, Environmental Engineering and Technology, Newport News, VA 23606.
3. Deputy General Manager, Operations, Long Beach Water Department, Long Beach, CA 90807.
4. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Nevada, Reno, Mail Stop 258, Reno, NV 89557-0152 (corresponding author). E-mail: amyec@unr.edu