(December 4, 2017, 10:09 AM EST) -- PITTSBURGH — Glass manufacturer PPG Industries Inc. on Nov. 21 filed a pretrial statement in Pennsylvania federal court, arguing that a trial is not needed in a groundwater contamination lawsuit brought by environmental groups (PennEnvironment, et al. v. PPG Industries Inc., et al. v. AS America Inc., et al., No. 12-342, W.D. Pa.)....