U.S. Air Force Airman 1st Class Bart Bolin, 97th Medical Operations Squadron bioenvironmental engineering journeyman, checks the acidity of a water sample Sept. 25. The bioenvironmental engineering flight gathers water samples quarterly to test for chemicals. Checking the pH levels within the water measures how acidic it is. (U.S. Air Force photo by Airman 1st Class Franklin R. Ramos/Released)
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ALTUS AIR FORCE BASE, OK, US
This work, Update: Altus AFB water quality, by SrA Franklin Ramos, identified by DVIDS, is free of known copyright restrictions under U.S. copyright law.