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Tech. Sgt. Christian Alarcon, 386th Expeditionary Medical Group Bioenvironmental Engineering technician, obtains a water sample at an undisclosed location in Southwest Asia, March 5, 2018. In order to ensure the water quality is safe for consumption, bioenvironmental sporadically tests the base water supply, including bottled water, for bacteria, chlorine and pH levels. (Air Force photo by Staff Sgt. William Banton)
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