(April 16, 2018, 11:17 AM EDT) -- PITTSBURGH — A federal judge in Pennsylvania on April 13 dismissed charges against a third-party plaintiff in a lawsuit brought by an environmental group that contends that glass-polishing activities contributed to local groundwater contamination. The glass manufacturer sued the third party, contending that it shared liability, but the judge said the third party produced evidence that it possessed the proper permits to conduct its operations (PennEnvironment, et al. v. PPG Industries Inc., et al. v. AS America Inc., et al., No. 12-342, W.D. Pa.)....