1. Assistant Professor, Dept. of Safety, Health, and Environmental Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung, Taiwan, R.O.C.; formerly, PhD, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801 (corresponding author).
3. Adjunct Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801; formerly, Head and Senior Chemical Engineer, Energy and Environmental Engineering, Illinois State Geological Survey, 615 E. Peabody Dr., Champaign, IL 61820 (corresponding author).
4. Chemical Engineer, Illinois State Geological Survey, 615 E. Peabody Dr., Champaign, IL 61820.
5. Manager, Particulate and Air Toxics Control, Energy Conversion Division, EPRI, 3412 Hillview Ave., Palo Alto, CA 20036.