INLAND CORPORATION

Incident Narrative

AT 17:15 ON OCTOBER 17, 2016 LOCAL OPERATIONS PERSONNEL WERE CONTACTED BY ANOTHER OPERATOR THAT THEY HAD RECEIVED AN ODOR COMPLAINT IN THE LIMA, OH AREA EAST OF I-75 NEAR MCCLAIN RD. BOTH OUR LOCAL PERSONNEL AND THE OTHER OPERATOR RESPONDED TO THE AREA TO INVESTIGATE. A RELEASE OF PRODUCT WAS CONFIRMED AT APPROXIMATELY 17:40. OUR CONTROL CENTER WAS NOTIFIED OF THIS SITUATION AT 17:44 AND THE SL-10 LIMA TO COLUMBUS NORTH LINE WAS FULLY SHUT DOWN AT 17:55. THE ROW IS COMMON TO TWO OTHER OPERATORS AND EXCAVATION WAS NECESSARY TO POSITIVELY IDENTIFY THE PIPELINE. AT APPROXIMATELY 21:50 THE RELEASE WAS ISOLATED AND CONFIRMED TO BE FROM THE INLAND SL-10 LIMA TO COLUMBUS NORTH PIPELINE. IT WAS DETERMINED THAT REPAIR COSTS WOULD LIKELY EXCEED $50K AND THE NRC WAS NOTIFIED ACCORDINGLY OF THE RELEASE (REPORT NO. 1161805) AT 22:21. ALL FREE PRODUCT WAS COLLECTED VIA VAC TRUCK. THE LINE WAS DRAINED DOWN AND PERMANENT REPAIR WAS COMPLETED VIA PIPE CUT OUT AND REPLACEMENT. THE LINE WAS REFILLED AND RESTARTED ON OCTOBER 22, 2016. THE FAILED SECTION OF PIPE, WHICH INCLUDED THE TYPE B PUMPKIN SLEEVE REPAIR, WAS SENT TO DET NORSKE VERITAS (DNV GL) WHERE A METALLURGICAL ANALYSIS WAS PERFORMED TO DETERMINE THE CAUSE OF THE FAILURE. THE RESULTS OF THE ANALYSIS INDICATE THAT THE FAILURE OCCURRED AS A RESULT OF FATIGUE CRACKING OF THE AXIAL BUTT WELD BETWEEN THE TWO HALF SHELLS OF THE TYPE B PUMPKIN SLEEVE. CONTRIBUTING FACTORS TO THE FAILURE INCLUDE MISALIGNMENT AND INCOMPLETE PENETRATION OF THE BUTT WELD BETWEEN THE TWO HALF SHELLS.