UPDATE Oct 29, 5 pm: Energy Transfer ran cleaning pigs through the pipeline from Devon Drive to the Chester County Library on Oct. 28th & 29th. Air pressure pushes the pig through the line, which was released at the end of each run. The test will be followed by dewatering, drying and cleaning the line, involving more noise and pressure release periodically on Oct. 30th and 31st, continuing into next week.