1. Associate Professor, Dept. of Civil and Environmental Engineering, 400 Snell Engineering, Northeastern Univ., 360 Huntington Ave., Boston, MA 02115 (corresponding author). E-mail: aalsha@coe.neu.edu
2. Associate Professor, Dave C. Swalm School of Chemical Engineering, Mississipi State Univ., Box 9595, Mississippi State, MS 39762-9595. E-mail: bricka@che.msstate.edu
3. Environmental Engineer, U.S. Army Engineer Research and Development Center, ERDC EL EP-E, 3909 Halls Ferry Rd., Vicksburg, MS 39180. E-mail: gentd@wes.army.mil