The Department of Environmental Protection said a subsidiary of Energy Transfer LP discharged drilling wastewater into creeks, wetlands and tributaries in Berks, Blair, Cambria, Cumberland, Delaware, Lebanon, Washington and Westmoreland counties between August 2018 and April 2019.
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The announcement of the civil settlement came as Energy Transfer deals with yet another spill along its troubled Mariner East pipeline network in southern Pennsylvania.
Last week, an Energy Transfer subsidiary, Sunoco Pipeline LP, spilled 8,100 gallons of drilling fluid into wetlands and a tributary of Marsh Creek Lake in Chester County, according to the DEP. About 33 acres of the 535-acre lake, located in Marsh Creek State Park, were placed off limits to boating and fishing during cleanup.
READ MORE: DEP investigating spill at Marsh Creek Lake in Chester County, Pennsylvania
DEP investigating spill at Marsh Creek Lake in Chester County, Pennsylvania
DEP halted drilling at the site and said it anticipates additional fines and "other regulatory ramifications."
Energy Transfer did not immediately comment.
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Sunoco has been hit with millions of dollars in fines and several temporary shutdown orders during construction of its Mariner East pipelines, primarily because of polluted waterways and drinking water wells.
Mariner East has been the subject of at least two criminal investigations, although a judge last month dismissed bribery and other charges in Chester County against a company security manager in what prosecutors called a "buy-a-badge" scheme to illegally use uniformed state constables as a private security force to patrol the Mariner East pipelines.
-- The Associated Press contributed to this report.