PHILLIPS 66 PIPELINE LLC

Incident Narrative

ON 11/13/18 AT 21:20 WHILE GL-09 WAS RUNNING IN STEADY STATE GEYSER UNIT 1 WENT DOWN ON LOW SUCTION. THE LINE WAS IMMEDIATELY SHUTDOWN AND BLOCKED IN. FIELD DISPATCHED TO INVESTIGATE. RELEASE WAS CONFIRMED BY AIRCRAFT ON 11/14 AT 10:40. NOTIFICATIONS WERE MADE AND EMERGENCY RESPONSE ACTIVITIES INITIATED. RELEASE WAS DUE TO FAILURE OF THE LONG SEAM. PIPE SEGMENT WAS CUT OUT AND REPLACED ON 11/17. LINE WAS RECOMMISSIONED AND RETURNED TO SERVICE ON 11-18-2018. REMOVED SECTION OF PIPING WAS SENT TO LAB FOR METALLURGICAL ANALYSIS. G5, ITEM #4 ""ADDITIONAL FACTORS"" IS SPECULATION FOR NOW UNTIL THE METALLURGICAL ANALYSIS IS COMPLETE UPDATE--01/31/2019 1) UPDATE REQUEST FROM BRIAN PIERZINA FOR GPS COORDINATES, CHANGE TIME TO MST AND INITIAL TIME TO REFLECT WHEN SCADA INDICATION OF RELEASE, NOT CONFIRMED. 2) UPDATED COST TO REFLECT ACTUALS TO DATE AND UPDATED AMOUNT OF CRUDE RECOVERED. ADDITIONAL UPDATES WILL BE ADDED ONCE WE HAVE A FINAL NUMBER ON PRODUCT RECOVERED. 3/13/2019 UPDATE FROM METALLURGICAL ANALYSIS RESULTS: THE FAILURE ON THE GLACIER (GL-09) 12-INCH PIPELINE WAS DUE TO OPERATIONAL PRESSURE CYCLE FATIGUE GROWTH THAT ORIGINATED FROM INTERNAL HOOK CRACK MANUFACTURING DEFECTS. THE FAILURE RESULTED IN A RUPTURE THAT WAS 42 INCHES LONG WITH A MAXIMUM WIDTH OF 2 INCHES. THE ORIGIN OF THE FAILURE WAS 5.1 INCHES LONG WITH A MAXIMUM DEPTH OF 98% OF THE PIPE SEAM WALL THICKNESS. THE AMOUNT RELEASED AND RECOVERED ARE ACCURATE. ONGOING REMEDIATION WILL RECOVER SMALL AMOUNTS THROUGHOUT THE YEARS.