1. Associate Professor, Environmental Sciences and Engineering, Univ. of Northern British Columbia, 3333 University Way, Prince George BC, Canada V2N 4Z9; presently, Dept. of Civil and Environmental Engineering, Univ. of Windsor, Windsor ON, Canada N9B 3P4.
2. Lecturer, Civil Engineering Technology, Environmental Management and Safety, Rochester Institute of Technology, 82-3103, 78 Lomb Memorial Drive, Richester, NY 14623.
3. Visiting Professor, Dept. of Civil and Environmental Engineering, Univ. of Windsor, 401 Sunset Ave., Windsor ON, Canada N9B 3P4. E-mail: rambala@uwindsor.ac