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Ralph S. Cunningham, Ph.D., has served as a member of our Board of Directors since 1999, and as Chairman of our Board of Directors since December, 2006. Dr. Cunningham currently serves on our Audit Committee and our Nominating & Corporate Governance Committee. Dr. Cunningham is presently a director and President and Chief Executive Officer of Enterprise GP Holdings L.P., which owns general partner and limited partner interests in Enterprise Products Partners L.P., a publicly traded partnership subject to the reporting requirements of the Exchange Act. Dr. Cunningham is also a director of Agrium, Incorporated, a Canadian publicly traded company involved in the agricultural chemicals business, and a director of EnCana Corporation, a Canadian publicly traded independent oil and gas company. Dr. Cunningham previously served as a director of Enterprise Products GP from 1998 until March 2005 and served as Chairman and a director of TEPPCO GP from March 2005 until November 2005. He retired in 1997 from CITGO Petroleum Corporation, where he had served as President and Chief Executive Officer since 1995. Dr. Cunningham served as Vice Chairman of Huntsman Corporation from April 1994 to April 1995; and from August 1990 to April 1994, he served as President of Texaco Chemical Company. Prior to joining Texaco Chemical Company, Dr. Cunningham held various executive positions with Clark Oil & Refining and Tenneco Inc. He began his career in Exxon’s refinery operations. Dr. Cunningham received his B.S. degree in Chemical Engineering from Auburn University and his M.S. and Ph.D. degrees in Chemical Engineering from Ohio State University. | 