Mealey's (October 28, 2015, 8:27 AM EDT) -- HARRISBURG, Pa. — The federal judge in Pennsylvania overseeing the groundwater contamination lawsuit brought by a group of residents against hydraulic fracturing company Cabot Oil & Gas Corp. on Oct. 26 partially granted a motion allowing the plaintiffs to depose a water filtration expert that the company had placed on the list of testifying experts, but then removed from that list. The judge said the plaintiffs were permitted to depose him because plaintiffs made “a compelling showing” that the information they sought could not be obtain...