MAGELLAN PIPELINE COMPANY, LP

Incident Narrative

THE RELEASE OCCURRED AT APPROXIMATELY 8:10 MST WHILE THE TANK WAS RECEIVING PRODUCT DURING COMMISSIONING. WHEN THE LEVEL IN TANK 2503 REACHED A POINT ON THE TANK NOZZLE OF 3 FT. PRODUCT BEGAN TO RUN OUT THROUGH A 1"" OPEN THREADED WELD-O-LET LOCATED ON THE 18""X16"" TANK NOZZLE. CONTRACTOR PERSONNEL ON SITE NOTIFIED LOCAL OPERATIONS AND PRODUCT MOVEMENT INTO THE TANK WAS SHUT DOWN. A ONE INCH VALVE AND PLUG WERE INSTALLED ON THE WELD-O-LET AFTER THE RELEASE WAS IDENTIFIED. THE WELD-O-LET WAS PLUGGED DURING THE SUCCESSFUL HYDRO-TESTING OF THE TANK. DURING THE P&ID AND PRE-STARTUP SAFETY REVIEW WALK THROUGH, A VALVE WAS IDENTIFIED AS BEING IN PLACE IN THE WELD-O-LET. HOWEVER, AT SOME SUBSEQUENT POINT THE VALVE WAS REMOVED BY PERSONS UNKNOWN AND THE WELD-O-LET LEFT OPEN DURING THE FILLING OF THE TANK WITH PRODUCT. A VISUAL INSPECTION WAS DONE PRIOR TO RECEIVING PRODUCT INTO TANKAGE BUT THE MISSING VALVE WAS NOT DETECTED AT THAT TIME. MOST OF THE RELEASED PRODUCT COLLECTED ON VISQUEEN SPREAD AROUND THE PERIMETER OF THE TANK AND WAS RECOVERED BY A VACUUM TRUCK. THE PRODUCT THAT IMPACTED THE SOIL WAS EXCAVATED AND PUT INTO A ROLL-OFF CONTAINER. APPROXIMATELY 5 YARDS OF SOIL WAS REMEDIATED.