1. Associate Professor, Civil and Environmental Engineering, Temple Univ., 1947 N. 12th St., Philadelphia, PA 19122 (corresponding author).
2. Associate Professor, Civil and Environmental Engineering, West Virginia Univ., P.O. Box 6103, Morgantown, WV 26506.
3. West Virginia Water Research Institute, West Virginia Univ., P.O. Box 6064, Morgantown, WV 26506.
4. Assistant Professor, Civil and Environmental Engineering, Temple Univ., 1947 N. 12th St., Philadelphia, PA 19122.
5. Professor, School of Public Health, Cardiovascular Research Center, West Virginia Univ., P.O. Box 9190, Morgantown, WV 26506.
6. Director, West Virginia Water Research Institute, West Virginia Univ., P.O. Box 6064, Morgantown, WV 26506.