By Mike McGann, Editor, The Times @mikemcgannpa Environmental groups are asking for a state investigation of a release of mud and potentially other substances into Marsh Creek Lake Monday as part of construction work on the Mariner East II pipeline pipeline — although Energy Transfer/Sunoco, the company building the pipeline, said Tuesday that the material … Continue reading Del-Chesco United slams ET/Sunoco over Mariner East II discharge into Marsh Creek Lake