Staff Sgt. Shane Pentheny, 22nd Civil Engineer Squadron Water and Fuels System Maintenance technician, pours water into a small vial in order to test the chlorine, fluoride and pH levels March 9, 2017, at McConnell Air Force Base, Kan. If the samplings yield low readings, which sometimes happens in low-use buildings, the normal procedure is to flush the building until desired results are achieved. (U.S. Air Force photo/Airman 1st Class Erin McClellan)
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