Airman 1st Class Peyton Oesterreich, 49th Aerospace Medicine Squadron bioenvironmental engineer apprentice, prepares a DR/850 colorimeter at the Domenici Fitness and Sports Center pool at Holloman Air Force Base, N.M., June 27. The DR/850 is used to test the chemical levels to determine the water’s quality, by using two filters that use wavelengths to detect the levels in water samples. Oeserreich was testing the base pools to ensure they have safe hydrogen and chlorine levels. (U.S. Air Force photo by Airman Leah Ferrante/Released)
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