BRIAN LEWIS is Chief of the Geological Services Unit, Northern California, Department of Toxic Substances Control. His unit is responsible for providing geological support primarily on Resource Conservation and Recovery (RCRA) land disposal facilities, both operating and closing. Mr. Lewis has twenty-six years experience, working on all aspects of water resources. He obtained his B.A. degree in geology with an emphasis in water resources from Occidental College, Los Angeles, CA. He has worked for the Department of Water Resources, State Water Resources Control Board, US Environmental Protection Agency (US EPA), Washington D.C., and the Department of Toxic Substances Control. He has been a Board member of GRA since its inception. Mr. Lewis has severed as Secretary (92-93), Treasure (92-94), Vice-President (1996-97), and President (1998-1999). He is a State Representative on US EPA’s Groundwater Forum and member of the Community Advisory Council, College of Natural Sciences and Mathematics, California State University, Sacramento. He is a Registered Geologist, Certified Engineering Geologist, and Certified Hydrogeologist.