Airman 1st Class Anthony Louden, 75th Logistics Readiness Squadron fuels lab technician, tests for particulates in aviation fuel using the bottle method, Feb. 14, 2017, at Hill Air Force Base, Utah. Before use by the base, all fuels are tested by 75th LRS technicians, who pour fuel samples through test pads and then weigh the particulates trapped on pads to determine if the fuel is within the acceptable parameters. (U.S. Air Force photo by Todd Cromar)