TARGA RESOURCES OPERATING LLC

Incident Narrative

"ON 2/11/2025 AT APPROXIMATELY 7:27 AM, TARGA PIPELINE CONTROL PERFORMED A ROUTINE STARTUP ON THE BRIDGER AUTOMATIC CUSTODY TRANSFER (ACT) PUMP SKID AND STARTED SHIPPING CRUDE OIL TO BRIDGER PIPELINE. AT APPROXIMATELY 8:30 AM TARGA OPERATOR MADE HIS ROUNDS AND DIDN'T NOTICE ANY ABNORMAL OPERATING CONDITIONS (AOC). AT APPROXIMATELY 8:45 AM ANOTHER TARGA OPERATOR PULLED INTO THE TERMINAL AND SAW CRUDE OIL ON THE GROUND OUTSIDE THE ACT BUILDING. TARGA OPERATOR IMMEDIATELY NOTIFIED TARGA PIPELINE CONTROL TO SHUT DOWN THE BRIDGER ACT PUMPS. APPROXIMATELY 80 BBLS OF CRUDE OIL WERE RELEASED FROM THE ACT ISOLATION VALVE STEM PACKING. THE MAJORITY OF THE CRUDE OIL RELEASED WAS CONTAINED IN THE ACT BUILDING AND RECOVERED IN THE BUILDING SUMP. AFTER THOROUGH INVESTIGATION, IT WAS IDENTIFIED THAT BRIDGER PIPELINE HAD RECENTLY REMOVED THEIR BACKPRESSURE VALVE FROM SERVICE RESULTING IN WHAT WAS DETERMINED TO BE HYDRAULIC HAMMERING ON THE BRIDGE ACT ISOLATION VALVE WHILE TARGA WAS SHIPPING TO BRIDGER PIPELINE. THE HYDRAULIC HAMMERING COMPROMISED THE INTEGRITY OF THE STEM PACKING, CAUSING THE CRUDE OIL RELEASE. SINCE THEN, BRIDGER PIPELINE HAS PLACED THEIR BACKPRESSURE VALVE BACK IN SERVICE, ELIMINATING THE HYDRAULIC HAMMERING TARGA EXPERIENCED. IN ADDITION, TARGA PROGRAMMED MAXIMUM FLOW RATES INTO THE ACT LOGIC TO MITIGATE IMPACTS TO TARGA EQUIPMENT IN THE EVENT BRIDGER PIPELINE'S BACKPRESSURE CONTROL VALVE HAPPENS TO FAIL. TARGA RESUMED SHIPPING TO BRIDGER PIPELINE ON 2/14/2025."