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General Sessions

General Sessions Speakers



Andrew D. Sawyers is the Director of the Office of Wastewater Management at the U.S. Environmental Protection Agency in Washington, DC, where he oversees the management of the National Pollutant Discharge Elimination System (NPDES), the Clean Water Act’s mechanism for the permitting of municipal and industrial discharge into surface waters of the U.S.  In his role as the Director of OWM, Andrew is also responsible for multiple technical and financial assistance tools for the development and maintenance of the country’s wastewater infrastructure, including the Clean Water State Revolving Fund. 

Previously at EPA, Andrew was the Deputy Director of the EPA’s Office of Ground Water and Drinking Water.  In that capacity, he worked with the Director to manage the implementation of the Federal Safe Drinking Water Act.  Prior to EPA, he was the Deputy Director for the Maryland Water Quality Financing Administration, managing the State’s Clean Water and Drinking Water State Revolving Funds and Maryland’s Chesapeake Bay Restoration Fund.  Andrew has a Ph.D. from Johns Hopkins University in Geography and Environmental Engineering. 




Paula Kehoe is the Director of Water Resources with San Francisco Public Utilities Commission (SFPUC). She is responsible for diversifying San Francisco’s water supply portfolio, including conservation, groundwater, and recycled water programs. Paula spearheaded the landmark legislation allowing for the collection, treatment and use of alternate water sources in buildings and districts. She worked for the SFPUC General Manager and assisted with the planning the $4.6 billion capital improvement program to rebuild the third largest water delivery system in California. She served as Public Education Director for the SFPUC’s Water Pollution Prevention Program receiving six state and national awards
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Dr. Robert L. Siegrist (a.k.a. Dr. Bob) is a faculty member at the Colorado School of Mines where he is a University Professor Emeritus of Environmental Science and Engineering, a Professor in the Civil and Environmental Engineering Department, and Director of the Small Flows Program. From 2001 to 2010, he also served as Director of the Environmental Science and Engineering Division at CSM. Before joining CSM in 1995, Dr. Siegrist held academic and research positions with the University of Wisconsin, Norwegian Institute for Georesources and Pollution Research, Ayres Associates Inc., and Oak Ridge National Laboratory.  He earned his B.S. (High Honors) and M.S. in Civil Engineering and his Ph.D. in Environmental Engineering at the University of Wisconsin working within the Small Scale Waste Management Project. Dr. Siegrist is an internationally recognized expert in onsite and decentralized systems for wastewater treatment and in situ remediation of contaminated soil and groundwater. He has published 300 technical papers and 3 books and holds 2 patents. His most recent textbook, “Decentralized Water Reclamation Engineering” is being published by Springer-Nature.  He has given invited lectures at more than 100 workshops and conferences in more than 30 countries worldwide. He has also served as a science and engineering advisor to government agencies in the U.S. and abroad and has been a Fellow with the NATO Committee for Challenges to Modern Society.




George Tchobanoglous, a professor emeritus in the UC Davis Department of Civil and Environmental Engineering, worries about how to deal with what we leave behind.

George_TchobanoglousTchobanoglous — affectionately known by colleagues and students as “George T” — is an international authority on wastewater treatment, management and reuse. He’s widely recognized for promoting the use of new technologies in four key areas: the construction of wetlands for wastewater treatment; the application of alternative filtration technologies; ultraviolet (UV) disinfection for wastewater reuse applications; and decentralized wastewater management.

His ground-breaking work on the use of aquatic plant systems for wastewater treatment led to the first national conference on this topic, back in 1979. At that point, he was nearly a decade into a 35-year teaching career at UC Davis, which had begun in 1970.

As chair of the National Water Research Institute’s UV committee, he helped draft the first UV guidelines for water reuse. His recognition as an expert on decentralized wastewater management systems led to his being drafted as a keynote speaker at numerous conferences.

Tchobanoglous has written more than 375 publications, including 14 textbooks and five engineering reference books. The textbooks are used in hundreds of college and universities throughout the United States, and by engineers in the States and abroad. He also served as editorial consultant for the McGraw-Hill book series, Water Resources and Environmental Engineering.

Tchobanoglous was elected to the National Academy of Engineering in early 2004, in recognition of his contributions to engineering education, engineering practice and public service in the field of environmental engineering. This honor followed numerous earlier accolades, such as the 2003 Athalie Richardson Irvine Clarke Prize for Excellence in Water Research, given to outstanding research scientists who have implemented better water-science research and technology.

Wanting to encourage those following in his footsteps, in 1999 Tchobanoglous and his wife established the George and Rosemary Tchobanoglous Graduate Fellowship: an endowed fund designed to recognize outstanding graduate students in environmental engineering. According to the Tchobanoglous’ wishes, the fellowship is reserved for students studying toward a master’s degree, who are not considered candidates for a doctoral degree. Recipients are selected each year by faculty members in the Department of Environmental Engineering.





Tracy Hammond manages the day-to-day lobbying activities for NOWRA at Polsinelli, LLC, NOWRA's Washington-based lobbying firm. He brings a strong and varied experience in marketing, politics, and advocacy to his clients. As a member of the firm’s National Public Policy group, he assists clients interested in shaping energy and environmental legislation and regulation. He advises both individual companies and coalitions with strategic planning and tactical implementation through advocacy with fellow industry members, elected officials, and other key decision makers.

He also updates clients on current and potential public policy impacts of federal legislation and regulatory actions and helps guide interaction with policymakers to take advantage of opportunities and avoid possible threats.

Tracy has worked extensively with clients on issues including smart grid deployment, traditional and renewable energy development, petroleum and bio-based transportation fuels, chemical regulation, energy efficiency, and tax policy. Tracy has more than a decade of direct interaction and representation before the U.S. Congress and many government agencies.

He entered politics by serving as an aide to the Minority Floor Leader of the Missouri General Assembly in Jefferson City, Mo. After arriving in Washington, D.C. He soon became an account executive for the Campaign Media Analysis Group (CMAG), providing political media activity analysis to both electoral and issue advocacy campaigns. Prior to joining Polsinelli, Tracy served as Vice President at Dutko Grayling (formerly Dutko Worldwide), where he was responsible for advising clients with the firm’s Energy, Environment and Sustainability practice. He holds an undergraduate degree from Southwest Missouri State University and a Masters from The George Washington University.