Staff Sgt. Paul Bauer, 9th Civil Engineer Squadron water and fuels system maintenance journeyman, prepares to bake a sample of bio-solid in an oven set to 265 degrees Celsius at the waste water facility on Beale Air Force Base, Calif., March 5, 2013. Through this scientific process the facility is able to determine how much bacteria is being removed from the bio-solid. (U.S. Air Force photo by Airman 1st Class Bobby Cummings/Released)
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