• PHMSA Administrator Paul Roberti and Deputy Administrator Ben Kochman visited the original leak site on Sunoco Pipeline, LP’s Twin Oaks Pipeline in Upper Makefield Township, Pennsylvania. They also visited additional locations in the surrounding area where maintenance activities on the Twin Oaks Pipeline were underway.

Thursday, September 11, 2025

• PHMSA issues Warning Letter to Sunoco Pipeline, LP, reminding the operator of their obligation to cooperate with PHMSA inspectors, including providing information as required by Federal pipeline safety regulations and the Consent Agreement.

Friday, May 2, 2025

• PHMSA issues a Consent Order and Consent Agreement to Sunoco Pipeline, LP to address the issues raised in the NOPSO.

Thursday, February 13, 2025

• PHMSA issues a Notice of Proposed Safety Order to Sunoco Pipeline, LP for the Upper Makefield spill.

Saturday, February 8, 2025

• PHMSA inspectors arrive on scene to initiate an investigation into the Twin Oaks pipeline failure. As part of its investigation, PHMSA evaluates what additional actions may be necessary as it uncovers more information about the circumstances leading to the failure.  

Friday, January 31, 2025

• Sunoco confirms a leak involving its Twin Oaks Pipeline system in Upper Makefield Township, Pennsylvania following odor complaints received from residents in the area.

Tuesday, January 21, 2025

• PHMSA directed Sunoco Pipeline, LP to investigate a possible leak involving its Twin Oaks Pipeline after receiving notifications from the Pennsylvania Department of Environmental Protection of the discovery of kerosene in well samples in the Upper Makefield Township, Pennsylvania community.