Acknowledgments

This study was performed as part of a long-term scientific collaboration between the U.S. Geological Survey (USGS) and Clean Water Services. We appreciate the assistance and cooperation of Rob Baur and other staff at the Durham Wastewater Treatment Facility in providing access, information, and water samples. Jan Miller of Clean Water Services helped coordinate the study. Helpful comments on this report were provided by reviewers from USGS (Elena Nilsen, Jennifer Morace, Don Wilkison, Greg Fuhrer) and Clean Water Services (Jan Miller, Bob Baumgartner, Rajeev Kapur).