1. Environmental Engineer, Urban Watershed Management Branch, Water Supply and Water Resources Division, National Risk Management Research Laboratory, U.S. Environmental Protection Agency (MS-104), Edison, NJ 08837.
2. Senior Research Engineering Advisor, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH 45268.
3. Mathematical Statistician, Office of the Director, Water Supply and Water Resources Division, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH 45268.