1. Graduate Student, Via Dept. of Civil and Environmental Engineering, Virginia Tech Univ., 200 Patton Hall, Blacksburg, VA 24061; and Senior Environmental Engineer, EEE Consulting, Inc., 8505 Bell Creek Rd., Mechanicsville, VA 23116 (corresponding author).
2. Associate Professor, Via Dept. of Civil and Environmental Engineering, Virginia Tech Univ., 200 Patton Hall, Blacksburg, VA 24061.