HOLLOMAN AIR FORCE BASE, N.M. -- Mark Stevenson,a water plant operator for the 49th Civil Engineer Squadron, pours a Dimethyl Pyridine Dicarboxylate chemical into a beaker to measure the chlorine levels present in Holloman's potable water during a water test Nov. 30, 2010. He and other operators test the quality of the potable water daily. Although the water is purified in Alamogordo, members from the 49th CES constantly perform checks to make sure it is always drinkable. (U.S. Air Force photo by Senior Airman Veronica Stamps/Released)
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