1. Assistant Professor of Engineering, Dept. of Physics, Univ. of North Georgia, Oakwood, GA 30566 (corresponding author).
2. Emeritus Cudworth Professor of Urban Water Systems, Dept. of Civil, Construction and Environmental Engineering, Univ. of Alabama, Tuscaloosa, AL 35487.
3. Professor, Environmental Engineering, School of Science, Engineering and Technology, Penn State, Harrisburg, PA 17057.