ENTERPRISE PRODUCTS OPERATING LLC

Incident Narrative

ON 1/26/2106 AT 0835 EST, A SEYMOUR TERMINAL TECHNICIAN DISCOVERED PRODUCT POOLED IN THE TANK DIKE AROUND TRANSMIX TANKS 3061, 3062, AND 3063. UPON FURTHER INVESTIGATION, IT WAS DETERMINED THE TANK VALVE (HV-206) ON TANK 3063 HAD FAILED NEAR THE BOTTOM OF THE VALVE BODY. ATMOSPHERIC READINGS WERE VERIFIED TO BE WITHIN ACCEPTABLE LIMITS AND TECHNICIANS WERE ABLE TO CLOSE THE VALVE AND ISOLATE THE LEAK. A TOTAL OF 533 BBLS OF TRANSMIX WAS RELEASED. AFTER DRAINING THE TANK AND REMOVING THE VALVE, IT WAS DETERMINED THAT THE VALVE FAILED DUE TO ICE BUILDUP INSIDE THE VALVE BODY. THE VALVE WAS REPLACED AND ENVIRONMENTAL CONTRACTORS CALLED OUT TO REMEDIATE THE RELEASED PRODUCT AND ENSURE ADDITIONAL REMEDIATION AND / OR MONITORING IS NOT REQUIRED. AN ANNUAL WORK ORDER HAS BEEN CREATED TO WINTERIZE VALVES SUSCEPTIBLE TO FREEZING. PER PHMSA'S REQUEST, THE TIME OF THE ACCIDENT HAS BEEN CHANGED TO 0835, THE EARLIEST TIME THE OPERATOR BECAME AWARE THAT ANY PRODUCT HAD BEEN RELEASED. AN ACCURATE DETERMINATION OF THE VOLUME OF THE SPILL AND POTENTIAL CLEANUP COSTS WAS NOT AVAILABLE UNTIL APPROXIMATELY 12:30 EST, AT WHICH TIME THE NRC WAS NOTIFIED. PER PHMSA'S REQUEST, THE NRC REPORT TIME HAS BEEN CHANGED FROM 11:42 CST TO 12:37 EST, A DIFFERENCE OF 5 MINUTES ATTRIBUTED TO THE START AND END OF THE NRC REPORT PHONE CALL.