MID - VALLEY PIPELINE CO

Incident Narrative

"ON 09/15/2024 AT 05:29, AN OPERATIONS SUPERVISOR RECEIVED REPORTS OF A CRUDE OIL SMELL COMING FROM THE AREA AROUND MVPL LIMA STATION. A LEAK WAS DISCOVERED INSIDE OF TANK 90 DIKE ON THE MVPL FILL LINE IN THE EAST TANK FARM AT LIMA STATION. THE STATION WAS SHUTDOWN, AND VALVES 7290A AND THE HOV WERE CLOSED. THE LINE WAS EXCAVATED AND A PINHOLE ON THE BOTTOM SIDE OF THE PIPE WAS IDENTIFIED. APPROXIMATELY 2 BARRELS OF CRUDE OIL WAS RELEASED INTO THE TANK DIKE AREA. RELEASED PRODUCT WAS CLEANED UP AND IMPACTED SOIL REMEDIATED. THE LINE WAS REPAIRED BY INSTALLING A 16-INCH PLIDCO MECHANICAL CLAMP AND THE LINE WAS RESTARTED AT 12:49. THE CAUSE OF THE ACCIDENT IS UNDER INVESTIGATION. THE FAILED SECTION IS PLANNED TO BE CUT OUT AND SENT TO A THIRD-PARTY LAB FOR ANALYSIS. A SUPPLEMENTAL REPORT WILL BE SUBMITTED ONCE THE INVESTIGATION IS COMPLETE. SUPPLEMENTAL & FINAL: THE METALLURGICAL ANALYSIS DETERMINED THE ACCIDENT WAS DUE TO INTERNAL CORROSION. THE CAUSE OF THE INTERNAL CORROSION WAS UNDER-DEPOSIT CORROSION. TO PREVENT REOCCURRENCE, OPERATIONS IS INCREMENTALLY REMOVING DEAD-LEG FACILITY PIPING, INTERMITTENTLY FLUSHING LOW FLOW FACILITY PIPING LINES TO PREVENT CORROSION PITTING AND ENHANCING THE CHEMICAL TREATMENT PROGRAM."