1. Member, ASCE
2. Envir. Engr., U.S. Envir. Protection Agency, Nat. Risk Mgmt. and Res. Lab., P.O. Box 1198, Ada, OK 74820. E-mail: Huling.Scott@EPA.GOV
3. Prof., Dept. of Chem. and Envir. Engrg., Univ. of Arizona at Tucson, Tucson, AZ 85721.
4. Chemist, U.S. Envir. Protection Agency, Nat. Risk Mgmt. and Res. Lab., P.O. Box 1198, Ada, OK. E-mail: Huling.Scott@EPA.GOV
5. Prof., Dept. of Chem. and Envir. Engrg., Univ. of Arizona at Tucson, Tucson, AZ.