1. Visiting Assistant Professor of Civil Engineering, Civil Engineering Dept., Georgia Southern Univ., 232 Forrest Dr., Statesboro, GA 30460; formerly, Assistant Professor, Dept. of Engineering, Pott College of Science and Engineering Univ. of Southern Indiana, 8600 University Blvd., IN 47712 (corresponding author).
2. Professor, Environmental Engineering; Director, Environmental Science and Management, Dept. of Civil and Environmental Engineering, Idaho State Univ., 921 S. 8th Ave., Stop 8060, Pocatello, ID 83209-8060.