1. Environmental Specialist, Division of Environmental Response and Site Revitalization, Ohio Environmental Protection Agency, 50 West Town St., Suite 700, P.O. Box 1049, Columbus, OH 43216-1049.
2. Professor of Civil Engineering, Univ. of Illinois–Urbana Champaign, 205 N. Mathews Ave., Urbana, IL 61801 (corresponding author).
3. Lieutenant, El Dorado Hills Fire Dept. and Waste Management Engineer, Dept. of Resources Recycling and Recovery (CalRecycle), California Environmental Protection Agency, Sacramento, CA 95814.
4. Enforcement Specialist, Cincinnati Health Dept., 3845 William P. Dooley By-Pass, Cincinnati, OH 45223.
5. Environmental Supervisor, Division of Emergency and Remedial Response, Ohio Environmental Protection Agency, Columbus, OH 43215.