Institution: | Richard C. Berg is senior geologist and Donald A. Keefer is a geologist with the Illinois State Geological Survey (615 E. Peabody Dr., Champaign, IL 61820).; Misganaw Demissie is principal scientist and Ganapathi Ramamurthy is professional scientist with the Illinois State Water Survey (2204 Griffith Dr., Champaign, IL 61820).; Charles A. Job is senior hydrologist with the U.S. Environmental Protection Agency (401 M Street, SW, Washington, DC 20460). |