COLIWASA sampling
Bill Goings, 90th Civil Engineer Squadron hazardous waste program manager, shows Omari Stewart, Freedom Elementary School sixth-grade student and son of Staff Sgt. Frederick Stewart, 90th Force Support Squadron shift leader, how to use a composite liquid waste sampler at the Warren recycling center April 23. A COLIWASA is a device that utilizes air pressure to take samples of liquid substances, and hazardous waste handlers use them to obtain samples of unknown substances for testing. (U.S. Air Force photo by Airman Jason Wiese)