1. Program Dir., Envir. Engrg., Mercer Univ., 1400 Coleman Ave., Macon, GA 31207.
2. Engr., City of Tampa Water Dept., City Hall Plaza, Tampa, FL 33602.
3. Prof., Univ. of South Florida, Dept. of Civ. and Envir. Engrg., Tampa, FL 33620.
4. Prof., Univ. of South Florida, Dept. of Civ. and Envir. Engrg., Tampa, FL.