1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, 765 Baldwin Hall, Univ. of Cincinnati, Cincinnati, OH 45221-0071.
2. Associate Professor of Environmental Engineering, Dept. of Civil and Environmental Engineering, 765 Baldwin Hall, Univ. of Cincinnati, Cincinnati, OH 45221-0071.
3. Herman Schneider Professor of Environmental Engineering, Dept. of Civil and Environmental Engineering, 765 Baldwin Hall, Univ. of Cincinnati, Cincinnati, OH 45221-0071.