TARGA DOWNSTREAM LLC

Incident Narrative

AT APPROXIMATELY 10:30 AM ON 3/19/2024 A PIPELINE TECHNICIAN DISCOVERED A SMALL LEAK ON MAINLINE VALVE D-MLV26 ON GPX-D WHILE CONDUCTING HIS WEEKLY INSPECTIONS. THE PIPELINE TECHNICIAN IMMEDIATELY MADE NOTIFICATION TO HIS SUPERVISOR TO INFORM HIM OF THE LEAK. INITIAL TELEPHONIC NOTIFICATION WAS MADE ON THE BASIS OF EXPECTING TO EXCEED $50,000 FOR REPAIRS. AN EMERGENCY ONE-CALL WAS SUBMITTED ON 3/19/2024 IN PREPARATION TO HAND EXCAVATE AROUND THE MAINLINE VALVE IN ORDER TO IDENTIFY THE SOURCE OF THE LEAK. ONCE EXCAVATED, TWO SMALL NON-HAZARDOUS LEAKS WERE IDENTIFIED. ONE ORIGINATING FROM THE MAINLINE VALVE STEM PACKING AND THE OTHER FROM THE MAINLINE VALVE BONNET CONNECTION. ON 3/19/2024 PIPELINE OPERATIONS TEAM UTILIZED GREASING EQUIPMENT TO GREASE THE PACKING AND VALVE SEATS IN AN ATTEMPT TO STOP THE STEM AND BONNET LEAK. AFTER GREASING AND PARTIALLY STOKING THE MAINLINE VALVE THE PIPELINE OPERATIONS TEAM WAS ABLE TO ELIMINATE THE LEAK FROM THE STEM AND REDUCE THE EMISSIONS FROM THE BONNET LEAK. 3/20/2024 3RD PARTY CONTRACTOR ATTEMPTED TO STOP THE BONNET LEAK WITH NO LUCK. 3/21-3/26/2024 PIPELINE OPERATIONS TEAM MONITORED LEAK LOCATION DAILY USING LEL MONITOR TO ENSURE LEAK WAS CONFINED TO COMPANY OWNED SECURED PROPERTY. 3/27/2024 3RD PARTY CONTRACTOR USED A DIFFERENT METHOD OF PACKING/SEALING TO SUCCESSFULLY ELIMINATE BONNET LEAK. THE PIPELINE OPERATIONS TEAM MONITORED THE LOCATION FOR THE FOLLOWING FOUR DAYS TO ENSURE BOTH LEAKS WERE ELIMINATED. THE PIPELINE OPERATIONS TEAM IS CONTINUING THEIR WEEKLY ONSITE INSPECTIONS OF THE VALVE FACILITY.