1. Associate Professor, Dept. of Civil, Environmental, & Architectural Engineering, Univ. of Colorado, 428 UCB, Boulder, CO 80309-0428.
2. AMAX Distinguished Chair of Environmental Science and Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401-1887.
3. Engineer I, EA Engineering, Science, & Technology, 15 Loveton Circle, Sparks, MD 21152.