1. Professor, Dept. of Civil Engineering (Emeritus), Colorado State Univ., Fort Collins, CO 80523. E-mail;
2. Senior Project Engineer, Metcalf & Eddy, Inc., 701 Edgewater Dr., Wakefield, MA 01880.
3. President, CH Diagnostic & Consulting Service, Inc., 214 SE 19th St., Loveland, CO 80537.
4. Professor, Dept. of Microbiology, Colorado State Univ., Fort Collins, CO 80523-1682.
5. Senior Project Engineer, Parsons, 3450 Buschwood Park Dr., Suite 345, Tampa, FL 33618.