1. Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, Department of Civil Engineering, University of Minnesota, 500 Pillsbury Drive SE, Minneapolis, Minnesota 55455, Pace Analytical Services Inc., 1700 Elm Street, Minneapolis, Minnesota 55414, St. Croix Watershed Research Station, Science Museum of Minnesota, 16910 152nd Street North Marine on St. Croix, Minnesota 55047 and Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive...