1. Reapectively, Hydrologist, NSI Technology Services Corp., 1600 SW Western, Corvallis, Oregon 97333; Statistician, Eastern Oregon State College, Mathematics Department, LaGrande, Oregon 97850; and Environmental Scientist/Limnologist, U.S. Environmental Protection Agency, 200 S.W. 35th St., Corvallis, Oregon 97333. (Corresponding author is M. Robbins Church.)