PLAINS PIPELINE, L.P. — Hazardous liquid — incident on 2008-11-17

Hazardous liquid incident in GUTHRIE, LOGAN County, OK. Reported cause: 11. Reported consequences: 0 fatalities, 0 injuries, YES CRUDE OIL released, $78,753 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20080358.

Operator ID: 300.

Reported incident date: 11/17/2008.

Cause detail: CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO EXCAVATION ACTIVITY

Cause detail: THIS INCIDENT OCCURRED AT A ROAD CROSSING. IT APPEARS THAT A ROAD GRADER GRADING THE DITCH AREA AT THE PIPELINE CROSSING SCRAPPED THE PIPELINE, LEAVING THREE DENTS AND GOUGES ON THE PIPELINE. THE RELEASE WAS FROM A FINE VERTICAL CRACK IN ONE OF THE DENTS WHICH CAUSED A SPRAY OF OIL FROM THE PIPELINE. A REVIEW OF THE COMTROL ROOM DATA DID NOT INDICATE ANY CHANGES IN PRESSURE TO INDICATE THAT A RELEASE OF CRUDE OIL HAD OCCURRED BECAUSE OF THE SMALL LEAK RATE FROM THE SMALL VERTICAL CRACK. THE RELEASE WAS REPORTED TO THE CONTROL CENTER BY A THIRD PARTY. THE FAILED SECTION OF THE PIPELINE IS BEING SENT TO A LABOARATORY FOR AN ANALYSIS AND INVESTIGATION TO FURTHER EVALUATE THE CAUSE OF THE FAILURE. A FINAL REPORT WILL BE SUBMITTED AFTER RECEIPT OF THE LABORATORY ANALYSIS REPORT. SUPPLEMENTAL REPORT. THE FINDINGS AND CONCLUSIONS IN REPORT NO. 0129-09-18891 BY STORK TESTING & METALLURGICAL CONSULTING, INC. DATED MARCH 6, 2009, STATE THAT "THE LEAK WAS CAUSED BY MECHANICAL DAMAGE IN THE FORM OF A DENT AND GOUGE". IT ALSO STATES: "SHALLOW CRACKS THAT SLANTED AWAY FROM THE GOUGES RESULTED FROM THE ELASTIC SPRINGBACK OF THE STEEL. AT THE GOUGE THAT EVENTUALLY LEAKED, THERE WAS A SMALL AMOUNT OF CRACK EXTENSION BY FATIGUE, WHICH PRECEDED THE FINAL BRITTLE FRACTURE OF THE PIPE AND CONSEQUENT LEAK." THE REPORT SUPPORTS OUR ORIGINAL STATEMENT THAT IT APPEARS THAT A ROAD GRADER GRADING THE DITCH AREA AT THE PIPELINE ROAD CROSSING SCRAPPED/GOUGED THE LINE. SINCE THERE WAS A SMALL AMOUNT OF CRACK EXTENSION BY FATIGUE, IT INDICATES THAT THE LEAK DID NOT OCCUR IMMEDIATELY BUT AT SOMETIME (DEPENDING UPON SIGNIFICANT PRESSURE CYCLING) AFTER THE HIGH RESOLUTION MAGNETIC FLUX TOOL RUN IN 2005. THE METALLURGICAL REPORT WAS SENT TO CHRIS MCCLAREN WITH THE SOUTHWEST REGION OF PHMSA ON MARCH 11, 2009.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: OTHER OUTSIDE FORCE DAMAGE — VEHICLE NOT ENGAGED IN EXCAVATION.

PHMSA indexed costs: $78,753 reported total cost, $43,907.278 in 1984 dollars, $108,130.111 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.