1. Dep. of Chemistry; Univ. at Buffalo, The State Univ. of New York; Buffalo NY 14260
2. Dep. of Geology and Environmental Geosciences; Northern Illinois Univ.; DeKalb IL 60115
3. Nebraska Water Center; School of Natural Resources, Univ. of Nebraska-Lincoln; Lincoln NE 68583
4. Dep. of Food and Environmental Sciences; Univ. of Helsinki; Helsinki Finland
5. Dep. of Civil and Environmental Engineering; Univ. of Nebraska; Lincoln 68588