MAGELLAN PIPELINE COMPANY, LP

Incident Narrative

THE STATION OPERATOR RECEIVED A HIGH SUMP ALARM AND A HAZ-GAS ALARM AT THE WEST TULSA EXPLORER STATION ON 7/17/18. OPERATIONS PERSONNEL INVESTIGATED THE SUMP AREA AND FOUND THE SUMP OVERFLOWING. ALL PIPELINE MOVEMENTS WERE SHUT DOWN AND EMERGENCY RESPONSE PROCEDURES WERE IMPLEMENTED. IMPACTED SOIL AND GRAVEL WAS EXCAVATED AND PROPERLY DISPOSED. PRIOR TO THE RELEASE, A LEAD OPERATOR LINED UP VALVES TO COMPLETE A BLENDING OPERATION. ANOTHER OPERATOR HAD OPENED AN INCORRECT VALVE WHICH ALLOWED A PRODUCT STORAGE TANK TO GRAVITY FEED BACK TO THE SUMP, CAUSING THE SUMP TO RAPIDLY FILL AND OVERFLOW. THE RELEASE WAS IMMEDIATELY STOPPED WHEN THE TANK VALVE WAS CLOSED. CORRECTIVE ACTIONS TO PREVENT REOCCURRENCE INCLUDE: INSTALLING A LOCK AND CHAIN ON MAINTENANCE VALVES ALONG WITH LABELS; INCREASED EMPHASIS ON IDENTIFYING VALVES THAT ARE SELDOM USED AND INITIATING DISCUSSION SURROUNDING APPROPRIATE LABELLING, LOCKS; WRITING A SPECIFIC PROCEDURE FOR TRUCK TO TANK BLENDING; AND IMPLEMENTING ADDITIONAL TRAINING FOR ALL STATION OPERATORS AND TRAINEES. THE NRC WAS CALLED ON 7/19/18 ONCE THE ANTICIPATED CLEAN UP COST WERE ESTIMATED TO EXCEED THE $50,000 PER 195.52(3). SUPPLEMENTAL FILED UPDATE: ORIGINAL REPORT SHOULD HAVE BEEN MARKED AS FINAL NO OTHER CHANGES. 8/16/2018