PLAINS PIPELINE, L.P.

Incident Narrative

AT APPROXIMATELY 15:00 (CST) ON FEBRUARY 5, 2013 A PLAINS COMMISSION DRIVER OBSERVED AN OIL SHEEN ON THE PINEY BRANCH TRIBUTARY AT THE HIGHWAY 528 BRIDGE, JASPER COUNTY, MS. THE DRIVER IMMEDIATELY NOTIFIED THE LOCAL STATION OPERATOR, WHO IN TURN CONTACTED THE OPERATIONS SUPERVISOR. A PIPELINE TECHNICIAN WAS DISPATCHED TO THE SITE; HE THEN CONFIRMED THAT CRUDE OIL WAS SEEPING FROM THE PLAINS RIGHT-OF-WAY. BOTH THE OPERATIONS SUPERVISOR AND DISTRICT MANAGER WERE CONTACTED AND BEGAN AGENCY NOTIFICATIONS. EMERGENCY RESPONSE EFFORTS WERE IMMEDIATELY INITIATED. THE PIPELINE WAS LOCKED OUT-OF-SERVICE AND AN EMERGENCY 'ONE CALL' WAS MADE IN ORDER TO EXCAVATE AND BEGIN THE INVESTIGATION INTO THE CAUSE OF THE RELEASE. A VISUAL EXAMINATION DETERMINED A SMALL DIAMETER HOLE AT THE 5:30 POSITION OF THE PIPELINE, WAS DUE TO INTERNAL CORROSION. THE DAMAGED SECTION OF THE PIPE WAS REMOVED AND REPLACED WITH NEW PIPE. APPROXIMATELY 122 BARRELS OF CRUDE OIL WERE RELEASED. AT THIS TIME, THE CAUSE OF THIS RELEASE IS STILL UNDER INVESTIGATION. THE PIPE WAS SENT TO A LAB TO BE ANALYZED FOR THE CAUSE OF FAILURE. A SUPPLEMENTAL WILL BE SUBMITTED ONCE THE RESULTS ARE RECEIVED. A TELEPHONIC NOTIFICATION WAS MADE TO THE NATIONAL RESPONSE CENTER AT 16:11 CST AND WAS ASSIGNED NRC REPORT NO. 1037650. SUPPLEMENTAL NARRATIVE: THE METALLURGICAL ANALYSIS REPORTED EXTENSIVE PITTING AND A LEAK AT THE 6 O'CLOCK ORIENTATION OF THE FAILED PIPE. THE EXAMINATION OF THE CORROSION DEPOSITS AND THEIR MORPHOLOGY INDICATED THAT THE CORROSION WAS CAUSED BY WATER AND POSSIBLY OTHER PRODUCTION FLUIDS IN THE PRODUCT STREAM. THE LEAK WAS CAUSED BY CUMULATIVE WALL-THINNING RESULTING FROM THIS INTERNAL CORROSION. IT IS BELIEVED THAT THE CHEMICAL AND MECHANICAL PROPERTIES OF THIS PIPE DID NOT CONTRIBUTE TO ITS FAILURE. THIS PIPE HAS BEEN PURGED WITH NITROGEN AND WILL REMAIN IN INACTIVE STATUS AND MAINTAINED UNDER 49CFR195.