MAGELLAN PIPELINE COMPANY, LP

Incident Narrative

DURING A FACILITY INSPECTION, THE LOCAL OPERATIONS PERSONNEL OBSERVED PRODUCT ON THE GROUND NEAR THE PROVER. THERE WAS NOT AN ACTIVE PIPELINE MOVEMENT BUT OPERATIONS CONTROL WAS NOTIFIED TO PREVENT ANY FUTURE STARTUP ACTIVITIES. ISOLATION VALVES WERE CLOSED TO ISOLATE THE PROVER AND CLEANUP ACTIVITIES WERE INITIATED. FREE PRODUCT WAS RECOVERED AND IMPACTED SOILS WERE PROPERLY DISPOSED OF. THE RELEASE ORIGINATED FROM A CRACKED 2"" BALL VALVE WHICH SERVED AS THE LOW POINT DRAIN VALVE FOR THE PROVER. THIS VALVE WAS WINTERIZED IN OCTOBER BUT BASED ON THE FAILURE, IT IS BELIEVED FREE WATER PRODUCT WAS RECEIVED FROM THE THIRD PARTY PIPELINE ASSOCIATED WITH THIS PROVER. FREEZING TEMPERATURES AND WATER ACCUMULATION AFTER THE WINTERIZATION CAUSED THE BALL VALVE TO CRACK RESULTING IN THE RELEASE. THE VALVE WAS REPLACED WITH A NEW VALVE AND OTHER LOW POINT COMPONENTS WITHIN THIS AFFECTED SECTION WERE INSPECTED. A TASK WAS CREATED TO PERFORM MONTHLY WINTERIZATION ON ASSETS ASSOCIATED WITH MOVEMENTS FROM THIS THIRD PARTY PIPELINE. OPERATIONS PROCEDURES ARE BEING MODIFIED TO REVIEW VALVE POSITION/PLUG INSTALLATION TO ALLEVIATE THE POTENTIAL FOR FROZEN VALVES AND COMPONENTS. ANALYTICAL RESULTS FROM A SUBSURFACE INVESTIGATION HAVE BEEN SUBMITTED TO THE COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT (CDPHE). THE CDPHE HAS RELEASED THE INCIDENT WITH NO ADDITIONAL INVESTIGATION/CLEANUP REQUIRED. 48-HR NRC UPDATE: #1235062, 1/11/19 14:44 SUPPLEMENTAL (05/03/2019): UPDATED PART A9, A11, PART H NARRATIVE SUPPLEMENTAL/FINAL (06/12/2019): UPDATED PART D8D, PART H NARRATIVE