MAGELLAN PIPELINE COMPANY, LP

Incident Narrative

MAGELLAN OPERATIONS CONTROL RECEIVED SCADA/LEAK WARN ALARM OF A PRESSURE DROP ON THE #6-10"" PIPELINE FROM EL DORADO TO KANSAS CITY, AND IMPLEMENTED MAGELLAN'S CODE RED PROCEDURE, IMMEDIATELY SHUTTING DOWN OF THE LINE. FIELD PERSONNEL INVESTIGATED AND FOUND THE LINE FAILURE; SUBSEQUENT INVESTIGATION DISCOVERED THE FAILURE ON THE PIPE SEAM. THE SEGMENT OF PIPE THAT FAILED WAS REMOVED AND SENT TO A METALLURGICAL LABORATORY FOR METALLURGICAL ANALYSIS. THE FAILURE ORIGINATED AT A CRACK THAT DEVELOPED UNDER AN AREA OF SELECTIVE SEAM CORROSION. THE SELECTIVE SEAM CORROSION DEVELOPED WITHIN AN AREA OF EXTERNAL CORROSION AND HAD A MAXIMUM DEPTH OF 68-PERCENT OF PIPE WALL THICKNESS. NEW PRE-TESTED PIPE WAS INSTALLED AND THE LINE WAS SUBSEQUENTLY RETURNED TO SERVICE AT A REDUCED PRESSURE IN ACCORDANCE WITH THE TERMS OF A CORRECTIVE ACTION ORDER ISSUED BY PHMSA. APPROXIMATELY 11,095 CUBIC YARDS OF IMPACTED SOIL WAS REMEDIATED. THIS REVISED SUPPLEMENTAL-FINAL REPORT WAS FILED TO INCLUDE THE COSTS ASSOCIATED WITH THE RESTORATION OF THE SITE AND THE ADDITIONAL VOLUME OF PRODUCT RECOVERED.