FORMER WURTSMITH AIR FORCE BASE, Mich. -- Dave Strainge, Air Force Civil Engineer Center environmental coordinator for the former Wurtsmith Air Force Base, Mich., puts up a fishing advisory sign June 26, 2013, on the AuSable River. The signage is one of the ways AFCEC is working with state health and environmental agencies to inform residents of the presence of perflourinated compounds, an emerging contaminant found in fish samples taken from the river in 2012. The center works closely with the Environmental Protection Agency and the Michigan Department of Environmental Quality to ensure environmental cleanup activities satisfy all regulatory standards while protecting human health and the environment. Strainge is a member of the AFCEC Installations Directorate base realignment and closure program management division. (Courtesy photo)