Grissom tests for PFCs
Mathew Lipiec, a contracted environmental engineer, collects water from one of four wells near Grissom Air Reserve Base, Ind., Sept. 2, 2015. The water will be tested for perflourinated compounds (PFCs), a class of synthetic fluorinated organic chemicals used in many industrial and commonly used consumer products. (U.S. Air Force photo/Tech. Sgt. Benjamin Mota)

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