1. Postdoctoral Associate, Dept. of Environmental Engineering Sciences, Univ. of Florida, P.O. Box 116450, Gainesville, FL 32611-6450, and Vice President, Innovative Waste Consulting Services, P.O. Box 141893, Gainesville, FL 32608.
2. Graduate Research Assistant, Dept. of Environmental Engineering Sciences, Univ. of Florida, P.O. Box 116450, Gainesville, FL 32611-6450.
3. Associate Professor, Dept. of Environmental Engineering Sciences, Univ. of Florida, P.O. Box 116450, Gainesville, FL 32611-6450.
4. Professor, Civil and Environmental Engineering Dept., Univ. of Central Florida, P.O. Box 162450, Orlando, FL 32816-2450.