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Dr. Ban was elected a director of the General Partner on February 22, 2006. He is currently serving as the Director of the Technology Transfer Division of the Argonne National Laboratory, a science-based Department of Energy laboratory dedicated to advancing the frontiers of science in energy, environment, biosciences and materials (March 2002 to present). He previously served as President and Chief Executive Officer of the Gas Research Institute, a gas industry research and development company funded by distributors, transporters, and producers of natural gas (1987 through 1999). He also served as Executive Vice President of GRI. Prior to joining GRI in 1981, he was Vice President, Research and Development and Quality Control of Bituminous Materials, Inc. Dr. Ban also serves as a director of UGI Utilities, Inc. and Energen Corporation. | 