Roger Henderson is an Environmental Engineer for the Corps of Engineers Sacramento District. Roger has served as the District's Innovative Technology Advocate (ITA) since 1994. He has over twelve years experience working in the environmental field. Roger holds a Bachelor of Science in Environmental Planning and Management from UC Davis and a Bachelor of Science in Civil Engineering from Oregon State University. He is a registered Civil Engineer in the State of California. Early on Roger worked at two US EPA environmental research laboratories (Research Triangle Park, North Carolina and Corvallis, Oregon) performing analytical analyses on air/water samples as well as managing biological uptake studies. The last 10 years with the US Army Corps has been spent in the District's Environmental Engineering Branch where he is now a technical section chief. His environmental experience encompasses EPA Superfund, RCRA, State Superfund and Formerly Utilized Defense Sites (FUDS). Over the last 5 years, Roger has heavily promoted the use of field portable analysis coupled with dynamic work plans to rapidly characterize contaminated sites. He has successfully achieved expedited characterization of over 15 small arms firing ranges via the use of field portable energy dispersive XRF units.