1. Upper Midwest Water Science Center, U.S. Geological Survey, 8505 Research Way, Middleton, Wisconsin 53562, United States
2. Idaho Water Science Center, U.S. Geological Survey, 230 Collins Road, Boise, Idaho 83702, United States
3. Department of Chemistry and Biochemistry, State University of New York at Fredonia, 280 Central Avenue, Science Complex 340, Fredonia, New York 14063, United States
4. Illinois Sustainable Technology Center/Prairie Research Institute, University of Illinois, Urbana-Champaign, One Hazelwood Road, Champaign, Illinois 61820, United States