(December 9, 2015, 2:18 PM EST) -- PITTSBURGH — The defendant in a hydraulic fracturing lawsuit related to claims that water treatment services failed and resulted in groundwater contamination on Dec. 4 filed a brief in Pennsylvania federal court arguing that the third-party complaint filed by a company it contracted should be dismissed (EQT Production Company v. Terra Services LLC v. Trumbull Corporation and Environmental Construction Inc., No. 14-01053, W.D. Pa.)....