PLAINS PIPELINE, L.P.

Incident Narrative

ON SEPTEMBER 18, 2012, WHILE PERFORMING THE MORNING INSPECTION OF THE MCCAMEY TANK FARM, THE OPERATOR DISCOVERED A RELEASE AT 06:30. NOTIFICATIONS TO THE CONTROL CENTER WERE MADE AND BY 06:40 THE SEGMENT OF 16-INCH SUCTION LINE FROM THE MANIFOLD TO THE ODESSA 16-INCH PUMPS HAD BEEN SHUTDOWN AND ISOLATED. THE PIPE WAS EXPOSED AT THE RELEASE SITE, INSPECTED AND A PRELIMINARY DETERMINATION BY OPERATIONS PERSONNEL THAT THE RELEASE WAS POSSIBLY CAUSED BY INTERNAL CORROSION. A TEMPORARY REPAIR WAS MADE ON THE LINE. THE LINE WAS THEN INSPECTED, RESTARTED AND PLACED BACK IN SERVICE. THE CAUSE OF THIS RELEASE IS STILL UNDER INVESTIGATION. THE PIPE WILL BE SENT TO A LAB TO BE ANALYZED FOR THE CAUSE OF FAILURE. A SUPPLEMENTAL WILL BE SUBMITTED ONCE THE RESULTS ARE RECEIVED. THIS SEGMENT WILL BE REPLACED. SUPPLEMENTAL NARRATIVE: THE METALLURGICAL ANALYSIS RESULTS DETERMINED THAT THE CAUSE WAS INTERNAL CORROSION DUE TO MICROBIOLOGICALLY-INFLUENCED CORROSION (MIC) AT THE 6 O'CLOCK POSITION. VISUAL EXAMINATION SHOWED CORROSION PITS PENETRATED THE PIPE WALL, THE MORPHOLOGY OF THESE PITS WAS CHARACTERISTIC OF MIC. THE METALLOGRAPHIC EXAMINATION SHOWED THAT THE CORROSION PITTING IN THE PIPE EXHIBITED UNDERCUTTING, WHICH IS ALSO CHARACTERISTIC OF MIC. THIS SEGMENT IS IN THE PROCESS OF BEING REPLACED.