1. Assistant Professor, Dept. of Civil, Architectural and Environmental Engineering, Drexel Univ., 3141 Chestnut St., Philadelphia, PA 19104.
2. Program Manager, Apex Environmental Inc., 269 Great Valley Pkwy., Malvern, PA 19355.
3. Graduate Student Researcher, Dept. of Civil, Architectural, and Environmental Engineering, Drexel Univ., 3141 Chestnut St., Philadelphia, PA 19104.