Treatment, for their technical assistance and coordination during this study. The authors also thank Mark Valerio of South Carolina Electric and Gas for the daily Williams Station plant operating data and Rebecca Thames of CWS for providing laboratory data. The authors also thank the CWS and U.S. Geological Survey reviewers for their thoughtful reviews and constructive comments of this report. At the time of publication, Tetra Tech data from the Bushy Park model were unavailable; for more information on the model, contact Charleston Water System.