PLAINS PIPELINE, L.P.

Incident Narrative

APPROXIMATELY 500 BBLS OF CRUDE OIL WERE RELEASED FROM A TANK-TO-TANK TRANSFER LINE, WHICH RUNS FROM PLAINS MIDLAND MESA TERMINAL TO THE ADJOINING PLAINS MIDLAND BASIN TERMINAL. THE RELEASE FROM THIS TERMINAL PIPING WAS A RESULT OF EXCAVATION DAMAGE BY A SECOND PARTY. THE ROOT CAUSE IS STILL UNDER INVESTIGATION. THE PIPE HAS BEEN SENT TO THE LAB TO UNDERGO METALLURGICAL ANALYSIS; THEREFORE, A SUPPLEMENTAL REPORT WILL BE SUBMITTED ONCE THE ROOT CAUSE AND LAB ANALYSIS IS RECEIVED. THE NATIONAL RESPONSE CENTER (NRC) WAS NOTIFIED AND ASSIGNED REPORT NUMBER 1104686. SUPPLEMENTAL NARRATIVE: BASED ON THE EXAMINATIONS AND ANALYSIS, IT WAS DETERMINED THAT THE FAILURE WAS THE RESULT OF THIRD-PARTY DAMAGE THAT CREATED A RELATIVELY LARGE DENT AT THE LF-ERW SEAM IN THE LINE. BECAUSE THE PIPELINE WAS IDENTIFIED AND ASSIGNED INCORRECTLY IN THE ONE-CALL SYSTEM, THE LINE WAS INADEQUATELY MARKED. SUBSEQUENTLY, THE LINE WAS STRUCK DURING AN EXCAVATION PROJECT. ADDITIONALLY, NO EVIDENCE OF CORROSION, FATIGUE, OR OTHER TIME-DEPENDENT FLAW-GROWTH MECHANISMS WERE OBSERVED AND NO EVIDENCE OF FLAWS IN THE LF-ERW SEAM OR IN EITHER OF THE ADJACENT GIRTH WELDS WERE IDENTIFIED.