1. Department
of Civil Engineering, University of Minnesota, 500 Pillsbury Drive SE, Minneapolis,
Minnesota 55455, United States
2. Pace Analytical Services Inc., 1700 Elm Street, Minneapolis, Minnesota
55414, United States
3. Department
of Earth Sciences, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis,
Minnesota 55455, United States
4. Institute of Biogeochemistry and Pollutant Dynamics (IBP), ETH Zurich, 8092 Zurich,
Switzerland
5. St. Croix Watershed
Research
Station, Science Museum of Minnesota, 16910 152nd Street North Marine on St. Croix, Minnesota 55047,
United States