1. Project Scientist, S2S Environmental Inc., 1099 Kingston Rd., Pickering, ON, Canada L1V1B5.
2. Professor, Dept. of Civil and Environmental Engineering, 1173 Glenn Martin Hall, Univ. of Maryland, College Park, MD 20742 (corresponding author).
3. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, 1173 Glenn Martin Hall, Univ. of Maryland, College Park, MD 20742.