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The Symposium will feature a panel of distinguished scientists and industry representatives with expertise in hydraulic fracturing and its environmental impact.  Panelists will include noted scientists who have worked on this topic and representatives of regulatory agencies who provide oversight on groundwater, soil, and air pollution. We will also include a representative of the local oil industry who will outline the techniques being used in north Orange County.  Panelists will be added to this website as their attendance is confirmed.


Robert Graves, U.S.G.S.
Dr. Graves is a Research Geophysicist at the U.S. Geological Survey's Pasadena Field Office and is the Southern California Regional Coordinator for the U.S.G.S. Earthquake Hazards Program. Dr. Graves's expertise is earthquake seismology. He received a B.S. in Geology from the University of California, Riverside and a PhD in Geophysics from Caltech.


W. Richard Laton, Ph.D
Dr. Laton is an associate professor of hydrogeology at Cal State Fullerton. His expertise is soil and water contamination; hydrology and surface water, wetlands, and coastal monitoring; field sampling techniques; and well hydraulics. In addition to his academic work, Dr. Laton serves as a consultant to the groundwater and environmental industries.

Air Quality

Susan Nakamura, S.C.A.Q.M.D.
Susan Nakamura is the Director of Strategic Initiatives at the South Coast Air Quality Management District (S.C.A.Q.M.D.). Ms. Nakamura’s responsibilities cover toxics rulemaking, the Clean Communities Plan, California Environmental Quality Act, and the Air Quality Management Plan.  Ms. Nakamura’s team developed Rule 1148.2 which was adopted April 5, 2013 and requires operators and chemical suppliers to notify and report specific information to the S.C.A.Q.M.D. regarding oil and gas operations.  She has a B.S. in Electrical Engineering from the University of California at Santa Barbara.

Environmental Impact

Mark Zeko, Environmental Engineering & Contracting Inc.
Mark Zeko is Vice President and Principal Hydrogeologist at Environmental Engineering & Contracting Inc. Mr. Zeko is a regestered professional geologist/hydrogeologist in 14 states and specializes in the remediation of groundwater, soil, and soil vapor impacted by industrial and commercial land uses. Mr. Zeko has a B.S. in Geology and M.S. in Environmental Sciences from Cal State Fullerton and is a Brea resident.

Industry Representative

Trent Rosenlieb, LINN Energy
Trent Rosenlieb is the Asset Manager for LINN Energy. He is a Registered Petroleum Engineer in the State of California with over 30 years of diverse experience in oil and natural gas exploration and production, with the majority of his professional career spent in the California oil and gas producing regions. His experiences have provided for a strong background in operational issues in rural and urban areas. He has been involved in critical dealings with land owners and regulatory agencies; working towards science and fact based solutions. Mr. Rosenlieb has a B.S. in Petroleum Engineering from the University of Wyoming and an M.B.A. from Keller Graduate School of Management.

Regulatory Oversight

Dr. Steve Bohlen, State Oil and Gas Supervisor and Head of the California Division of Oil, Gas, and Geothermal Resources (D.O.G.G.R.).
Dr. Bohlen was appointed by Governor Brown on June 2, 2014 as State Oil and Gas Supervisor and head of the Division of Oil, Gas and Geothermal Resources (D.O.G.G.R.). Bohlen has devoted much of his career to using scientific evidence to inform policy development at multiple levels of federal and state government. Prior to joining D.O.G.G.R., Bohlen was the Program Director for Nuclear and Domestic Security (2013-2014) and previously the Deputy Program Director for Energy Security (2011-2013) at the Lawrence Livermore National Laboratory. From 2008 to 2010, Bohlen was a Research Professor and interim Director of the Integrated Ocean Drilling Program at Texas A&M University.  As C.E.O. of Joint Oceanographic Institutions from 2000-2008, Bohlen led the global effort in scientific ocean drilling through the Integrated Ocean Drilling Program and the development of the U.S. National Science Foundation’s Ocean Observatories. From 1995 through 2000, Bohlen was Associate Chief Geologist for Science at the U.S. Geological Survey. He was responsible for the scientific priorities and funding of the broad portfolio of U.S.G.S. research, including the National Earthquake Hazards Reduction, Climate Change, Global Energy and Minerals Resource programs. Bohlen was a consulting professor at Stanford University from 1988-1995 and a tenured professor at Stony Brook University from 1985-88. He was a postdoctoral research fellow at U.C.L.A. and holds an A.B. from Dartmouth College and a Ph.D. in geology from the University of Michigan.


David Bowman, Ph.D
Dr. Bowman will be the Panel Moderator.  He is the Interim Dean of the College of Natural Sciences and Mathematics and Professor of Earthquake Seismology at Cal State Fullerton.