INLAND CORPORATION

Incident Narrative

ON 10/3/2017 AT 16:30, OREGON, OH PUBLIC WORKS AND FIRE CHIEF NOTIFIED LOCAL OPERATOR PERSONNEL OF AN ODOR COMPLAINT COMING FROM THE STORM WATER SEWERS IN THE AREA. BETWEEN THE DATES OF 10/3 AND 10/8, OPERATOR PERSONNEL INVESTIGATED THE ODOR COMPLAINT. ON 10/8/2017 AT 14:33 OPERATOR VERIFIED A PIN-HOLE LEAK IN THE 10"" LIMA-TOLEDO PIPELINE (LINE ID 13201). AFTER DISCOVERY OF RELEASE, DUE TO WATER IMPACT, NRC WAS NOTIFIED AT 15:34 LOCAL TIME ON 10/8 AND REPORT NO. 1192655 WAS ISSUED. OPERATOR ASSESSED ADJACENT PIPELINE NEAR POINT OF PINHOLE LEAK, CUT OUT THE SECTION OF FAILED PIPING AND REPLACED WITH NEW PIPING. REQUIRED 48 HOUR UPDATE TO NRC WAS MADE ON 10/10/2017 AND REPORT NO. 1192855 WAS ISSUED. FAILED PIPE WAS SENT TO 3RD PARTY LABORATORY FOR METALLURGICAL ANALYSIS. METALLURGICAL ANALYSIS CONFIRMED THE CAUSE OF THE FAILURE AS EXTERNAL CORROSION PITTING AND THINNING OF THE PIPE WALL. THE FAILURE WAS ACCOMPANIED BY A 1.5"" LINEAR FEATURE ON THE INTERNAL DIAMETER OF THE PIPE LIKELY DUE TO THE CORROSION THINNING OF THE PIPE WALL. THE EXTERNAL CORROSION WAS LIKELY CAUSED BY DISBONDED COATING AND RESULTANT SHEILDING OF CATHODIC PROTECTION TO THE PIPE. AFTER THE REALEASE ILI DATA WAS REEXAMINED AND AN ADDITIONAL FOUR (4) FEATURES WITH SIMILAR CALLS TO THAT OF THE FAILED FEATURE WERE EXCAVATED, INVESTIGATED AND DETERMINED THE BE WITHIN TOOL SPEC. LOCAL AREAS OF DISBONDED COATING WERE ALSO REPAIRED AT THESE LOCATIONS.