ENERGY TRANSFER COMPANY — Hazardous liquid gravity and reporting-regulated-only — incident on 2023-05-16

Hazardous liquid gravity and reporting-regulated-only incident in COX CITY, STEPHENS County, OK. Reported cause: INCORRECT OPERATION. Reported consequences: 0 fatalities, 0 injuries, 2 CRUDE OIL released, $10 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20230050.

Operator ID: 32099.

Reported incident date: 5/16/2023 14:30.

Cause detail: VALVE LEFT OR PLACED IN WRONG POSITION, BUT NOT RESULTING IN A TANK, VESSEL, OR SUMP/SEPARATOR OVERFLOW OR FACILITY OVERPRESSURE

Cause detail: ON 5/16/23 AT APPROXIMATELY 14:00, A LANDOWNER NOTIFIED OPERATIONS OF A LEAK ON THE 553029 - COX CITY GATHERING - 4-INCH COX CITY LINE. ONCE ON-SITE, OPERATIONS NOTICED THE TRAP DOOR VENT PLUG FAILED RELEASING 2 BARRELS OF CRUDE OIL. THE VENT PLUG WAS FOUND ON THE GROUND ABOUT 3FT FROM THE TRAP. THE TRAP WAS ISOLATED AND REMOVED FOR INSPECTION. ALL RELEASED PRODUCT WAS CLEANED UP. AN INVESTIGATION DETERMINED THE FAILURE WAS CAUSED BY VIBRATION THAT OCCURS DURING MAINTENANCE PIG RUNS. THE TIGHTNESS OF THIS PLUG WAS NOT CHECKED PRIOR TO MAINTENANCE PIG RUNS. THE CLOSURE DOOR VENT PLUG WAS REPLACED AND TIGHTENED. TO PREVENT REOCCURRENCE, GOING FORWARD OPERATIONS PERSONNEL WILL ENSURE CLOSURE DOOR VENT PLUG IS TIGHTENED BEFORE ANY PIGGING OPERATIONS ARE BEGUN. SUPPLEMENTAL & FINAL - PHMSA REQUESTED TO UPDATE CAUSE TO INCORRECT OPERATION.