1. Associate Professor, Dept. of Civil and Environmental Engineering, Michigan Tech Univ., Houghton, MI 49931 (corresponding author).
2. Ph.D. Student, Dept. of Civil and Environmental Engineering, Michigan Tech Univ., Houghton, MI 49931.
3. Graduate Student, Dept. of Civil and Environmental Engineering, Michigan Tech Univ., Houghton, MI 49931.
4. ORISE Postdoctoral Research Participant, U.S.E.P.A., Athens, GA 30605.