1. Graduate Student, Civil and Environmental Engineering, Utah Water Research Laboratory, Utah State Univ., 8200 Old Main Hill, Logan, UT 84321-8200.
2. Associate Professor, Civil and Environmental Engineering, Utah Water Research Laboratory, Utah State Univ., 8200 Old Main Hill, Logan, UT 84321-8200 (corresponding author).
3. Environmental Engineer, Utah Dept. of Environmental Quality, Division of Water Quality, 195 North 1950 West, Salt Lake City, UT 84116.
4. Water Resources Management Specialist, Wisconsin Dept. of Natural Resources, 101 S. Webster St., Madison, WI 53707.
5. Chief, Water Quality Management, Utah Dept. of Environmental Quality, Division of Water Quality, 195 North 1950 West, Salt Lake City, UT 84116.
6. Environmental Engineer, Dept. of Ecology, P.O. Box 47600, Olympia WA 98504-7600.
7. Professor, Civil and Environmental Engineering, Tufts Univ., 113 Anderson Hall, Medford, MA 02155.