ET CRUDE OPERATING LLC

Incident Narrative

"ON 04/15/25 AT 07:40, CRUDE OIL WAS DISCOVERED ON THE GROUND BENEATH STATION PIPING AT TANK 2538 CUSHING TANK FARM. THE LEAK WAS COMING FROM A PINHOLE AT THE 6 O'CLOCK POSITION ON THE CIMARRON 8-INCH LINE. APPROXIMATELY 8 BARRELS OF CRUDE OIL WAS RELEASED ON THE GROUND. CLEANUP CONTRACTORS REMOVED PRODUCT AND CONTAMINATED SOIL. THE PIPE WAS TEMPORARILY REPAIRED WITH A PLIDCO CLAMP. THE CAUSE OF THE LEAK IS STILL UNDER INVESTIGATION. A SUPPLEMENTAL REPORT WILL BE SUBMITTED ONCE THE INVESTIGATION IS COMPLETE. SUPPLEMENTAL & FINAL: THE FAILED PIPE WAS CUTOUT AND SENT TO A THIRD PARTY LAB FOR ANALYSIS. THE METALLURGICAL ANALYSIS DETERMINED THAT THE FAILURE WAS DUE TO AN INTERNAL CORROSION PINHOLE AT THE 6 O'CLOCK POSITION. THE CAUSE OF THE INTERNAL CORROSION WAS MICROBIAL INFLUENCED CORROSION (MIC). THE MIC OCCURRED DUE TO INFREQUENT FLOW OF THE LINE. TO PREVENT REOCCURRENCE, MECHANICAL INTEGRITY WILL INSPECT TERMINAL LINES REGULARLY AND OPERATIONS WILL INTRODUCE FLOW OR FLUSH THE LINE REGULARLY."