Neil Terry, USGS, Storrs, CT, United States, Jordan L. Wilson, USGS, Rolla, United States, Lance R. Gruhn, USGS, Iowa City, IA, United States, Clinton R. Bailey, USGS, DeKalb, United States, Frederick David Day-Lewis, USGS Office of Groundwater, Branch of Geophysics, Storrs, CT, United States, Jared Trost, USGS Minnesota Water Science Center, Mounds View, MN, United States, Isabelle Cozzarelli, USGS, Reston, VA, United States, Barbara A Bekins, USGS, Menlo Park, CA, United States and John W Lane Jr, USGS, Hydrogeophysics Branch, Storrs, CT, United States