1. Ph.D. Candidate, Environmental Engineering, Univ. of Cincinnati, Cincinnati, OH 45221-0012 (corresponding author).
2. Professor, Environmental Engineering, Univ. of Cincinnati, Cincinnati, OH 45221-0012.
3. Professor Emeritus, Environmental Engineering, Univ. of Cincinnati, Cincinnati, OH 45221-0012.
4. Environmental Engineer, Metropolitan Sewer District of Greater Cincinnati, 225 West Galbraith Rd., Cincinnati, OH 45204.