HARRISBURG, Pa. (AP) — The developer of a major pipeline system has pleaded no contest to criminal charges that it systematically polluted waterways and residential water wells across hundreds of miles in Pennsylvania. Dallas-based Energy Transfer Operating agreed Friday to independent testing of homeowners’ water and promised to remediate contamination. The settlement involves two separate criminal cases brought by the Pennsylvania attorney general. Under a plea deal, the company will pay $10 million to restore watersheds and streams along the Mariner East pipeline network. Mariner East has been one of the most penalized projects in Pennsylvania history. Energy Transfer had no immediate comment.