MARATHON PIPE LINE LLC

Incident Narrative

ON 9/25/2022 AT 23:02 EASTERN TIME (LOCAL TIME), PUTNAM COUNTY 911 CONTACTED THE FINDLAY POC ABOUT AN ODOR NEAR FILLMORE, IN. THE RIO8 PRODUCTS LINE, RUNNING IN A STEADY STATE, WAS SHUT DOWN AT 09/25/2022 23:13 EASTERN TIME AND STEPS WERE TAKEN TO INVESTIGATE THE 911 REPORT. A SECOND CALL FROM PUTNAM COUNTY 911 AT 09/25/2022 23:40 EASTERN TIME PROVIDE THE COMPANY WITH AN UPDATED LOCATION REPORTING A SHEEN ON WATER NEAR THE PIPELINE. AREA OPERATIONS PERSONNEL ARRIVE ON SITE AT 9/25/2022 23:47 EASTERN TIME TO CONFIRM A RELEASE OCCURRED BASED ON SMELL ALONE. THE UPSTREAM BLOCK VALVE AT MILEPOST 173 WAS CLOSED AT 00:29 09/26/2022 EASTERN TIME AND THE DOWNSTREAM BLOCK VALVE AT MILEPOST 183 WAS CLOSED AT 00:30 09/26/2022 EASTERN TIME. COMPANY PERSONNEL WERE ABLE TO CONFIRM THE PRESENCE OF A SHEEN ON WATER/CREEK BANK OF DYER CREEK AT 01:40 EASTERN TIME ON 9/26/2022 AND A CALL WAS MADE TO THE NRC AT 01:52 EASTERN TIME. DUE TO THE PROPERTIES OF THE NATURAL GASOLINE AND RESPONDING TO THE RELEASE IN THE MIDDLE OF THE NIGHT, IT WAS CHALLENGING FOR RESPONDING PERSONNEL TO DISTINGUISH THE NATURAL GASOLINE FROM WATER. THE NATURAL GASOLINE DOES NOT IMPART A HIGH CONTRAST SHEEN TO WATER LIKE OTHER PETROLEUM PRODUCTS. THESE FACTORS INCREASED THE TIME IT TOOK TO CONFIRM THE PRESENCE OF NATURAL GASOLINE ON WATER AND CONTRIBUTED TO THE LOWER RELEASE VOLUME ESTIMATE ORIGINALLY REPORTED TO THE NRC. THE FIRST OSRO ONSITE AT 01:45 EASTERN TIME AND SECOND OSRO ONSITE AT 04:30 EASTERN TIME ON 9/26/2022. PRIOR TO COMPANY RESPONSE EQUIPMENT BEING ONSITE, THE LOCAL FIRE DEPARTMENT DEPLOYED SOFT, SAUSAGE BOOM ON DYER CREEK. COMPANY PERSONNEL DEPLOYED TO THE SITE CONTAINED THE RELEASE AND WORKED TO EXPOSE THE PART OF THE PIPELINE WERE THE RELEASE ORIGINATED. ONCE THE RELEASE AREA WAS EXPOSED AND IDENTIFIED, A WOOD PLUG WAS USED TO STOP THE RELEASE AND AN 8"" PLIDCO CLAMP WAS INSTALLED AROUND 23:45 ON 09/26/2022. AFTER SANDBLAST OF THE COATING FROM RELEASE POINT TO UPSTREAM AND DOWNSTREAM JOINTS, THE COMPANY CHOSE TO REMOVE THE 8"" PLIDCO AND INSTALL A 24"" PLIDCO CLAMP ON 09/28/2022. THE LINE WAS RESTARTED AFTER A STATIC LINE TEST AND ADJUSTED SETPOINTS TO ACCOMMODATE A 10% DERATE. A CUT OUT OF THE PIPE IS SCHEDULED FOR THE WEEK OF OCTOBER 24TH AND METALLURGICAL ANALYSIS WILL BE PERFORMED THE WEEK OF NOVEMBER 7TH. A SUPPLEMENTAL REPORT WILL BE SUBMITTED WITH THE RESULTS OF THOSE ACTIVITIES. ON 12/15/2022 - THE SPEEDWAY RIO-STAUNTON 8"" FAILURE ANALYSIS AND METALLURGIC EXAMINATION REPORT WAS RECEIVED FROM THE VENDOR. THE REPORT CONCLUDED THAT THE LEAK COINCIDED WITH THE GIRTH WELD, RESULTING IN AN APPROXIMATELY 1/8-INCH THROUGH-WALL HOLE. THE GIRTH WELD CONTAINED A SERIES OF ORIGINAL CONSTRUCTION WELDING FEATURES, WHICH COULD CONTAIN AN AREA OF UNDERCUT, BURNTHROUGH, OR SUCKBACK. THE WELD DEFECT AREA AND WALL LOSS CREATED AN ENVIRONMENT CONDUCIVE FOR INTERNAL CORROSION IN THE WELD FEATURE. THIS LINE HAS HISTORICALLY NOT BEEN A HIGH RISK OF INTERNAL CORROSION, WHICH INDICATES THAT CORROSION WOULD NOT HAVE BEEN A CONTRIBUTING FACTOR WITHOUT THE CAUSAL FACTOR OF THE GIRTH WELD FEATURE. ON 1/9/2023 - UPDATES WERE MADE TO PART G AND PART K OF THE REPORT.