FILE – This Feb. 13, 2012, file photo shows a Cabot Oil & Gas Corp. wellhead in Dimock, Pa. Federal government scientists are collecting water and air samples in the first week of August 2017 from about 25 homes in Dimock, Pa., a tiny, rural crossroads about 150 miles north of Philadelphia that became a flashpoint in the national debate over fracking, to investigate ongoing complaints about the quality of the drinking water. (AP Photo/Matt Rourke, File)
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