Matthew Landon has been a Hydrologist with the U.S. Geological Survey since 1990. He received a M.S. in Geology from the University of Minnesota in 1993 and a B.S. in Geology from the University of Kansas in 1987. He has conducted studies of groundwater hydrology and geochemistry in Minnesota, Nebraska, California, and Southeast Asia. He has been with the USGS California Water Science Center in San Diego since 2005, currently serving as Project Chief for the USGS California Oil, Gas, and Groundwater project in support of the California State Water Board’s regional monitoring program in oil and gas areas.