Lagrangian Sampling of Wastewater Treatment Plant Effluent in Boulder Creek, Colorado, and Fourmile Creek, Iowa, During the Summer of 2003 and Spring of 2005— Hydrological and Water-Quality Data By Larry B. Barber, Steffanie H. Keefe, Dana W. Kolpin, Douglas J. Schnoebelen, Jennifer L. Flynn, Gregory K. Brown, Edward T. Furlong, Susan T. Glassmeyer, James L. Gray, Michael T. Meyer, Mark W. Sandstrom, Howard E. Taylor, and Steven D. Zaugg Open-File Report 2011–1054 U.S. Department of the Interior U.S. Geological Survey