KELLY, Walton R., Illinois State Water Survey, University of Illinois, 2204 Griffith Drive, NA, Champaign, IL 61820, wkelly@illinois.edu

DAILEY, Kelsey R., Byrd Polar Research Center and School of Earth Sciences, The Ohio State University, 275 Mendenhall Laboratory, 125 S. Oval Mall, Columbus, OH 43210, dailey.154@osu.edu, LYONS, W. Berry, Byrd Polar Research Center and School of Earth Sciences, The Ohio State University, Columbus, OH 43210, and WELCH, Kathleen A., Byrd Polar Research Center, The Ohio State University, 1090 Carmack Rd, 108 Scott Hall, Columbus, OH 43210-1002

WYMAN, Davina A., Geosciences Department, Western Michigan University, 1187 Rood Hall, Kalamazoo, MI 49008, davina.a.wyman@wmich.edu and KORETSKY, Carla M., Geosciences Department, Western Michigan University, 1903 W Michigan Ave, Kalamazoo, MI 49008-5241

HON, Rudi, Earth and Environmental Sciences, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA 02467, hon@bc.edu and BESANCON, James, Department of Geosciences, Wellesley College, 106 Central St, Wellesley, MA 02481

DILLON, Peter¹, HON, Rudi², BESANCON, James³, MCINNIS, John R.¹, and ANDERSON, Jacob⁴, (1) Norwell Water Department, Town of Norwell, 345 Main Street, Norwell, MA 02061, pdillon@townofnorwell.net, (2) Earth and Environmental Sciences, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA 02467, (3) Department of Geosciences, Wellesley College, 106 Central St, Wellesley, MA 02481, (4) Earth & Environmental Sciences, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA 02467

BESANCON, James, Department of Geosciences, Wellesley College, 106 Central St, Wellesley, MA 02481, jbesancon@wellesley.edu and HON, Rudolph, Earth and Environmental Sciences, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA 02467

GRIFFEY, Denisha, Geosciences, Western Michigan University, Kalamazoo, MI 49008, denisha.c.griffey@wmich.edu and KORETSKY, Carla M., Geosciences Department, Western Michigan University, 1903 W Michigan Ave, Kalamazoo, MI 49008-5241