AUX SABLE LIQUID PRODUCTS

Incident Narrative

AT 02:00, AUX SABLE CONTROL ROOM RECEIVED A PHONE CALL FROM LYONDELL BASELL CONTROL ROOM ABOUT A POSSIBLE BODY RELIEF VALVE RELIEVING ON THE PIPELINE AT THE DIRECT CONNECT TO LYONDELL (EP METTER SKID). AT 02:04, THE AUX SABLE CONTROL ROOM CALLED THE ON-CALL PIPELINE TECH ASKING THEM TO RESPOND TO THE POSSIBLE LEAK. AT 03:00, THE PIPELINE TECH ARRIVED AT THE LOCATION, THE LEAK WAS ISOLATED AND THE SECTION OF PIPELINE WAS DEPRESSURIZING TO THE FLARE. AT 03:50, THE PIPELINE TECH STARTED THE PROCESS TO REPLACED THE BODY RELIEF DEVICE. AT 05:07, THE PIPELINE TECH CALLED THE CONTROL ROOM AND STATED THE BODY RELIEF VALVE HAD BEEN REPLACED AND THE PIPELINE COULD BE PRESSURED BACK UP. THE PIPELINE WAS NOT FLOWING AT THE TIME OF THE LEAK AND WAS AT A STEADY/IDLE STATE WITH THE PRESSURE BEING AT 600PSIG WELL BELOW THE 1440PSIG MOP. THE AUX SABLE EP EXTENSION PIPELINE TRANSPORTS HVL (ETHANE), THE LEAK WAS IN THE FORM OF A VAPOR COMING OUT OF THE BODY RELIEF VALVE AND DISSIPATED INTO THE ATMOSPHERE AND REQUIRED NO CLEAN UP ACTIVITIES. THE BODY RELIEF VALVE WAS BELIEVED TO FAIL DUE TO WATER/ICE INTRUSION AS IT WAS RAINING AND TEMPERATURES FELL BELOW FREEZING THAT NIGHT, THE BODY RELIEF VALVE HAD WATER COMING OUT OF IT WHEN IT WAS WARMED UP. THE PIPELINE WAS CHECKED FOR LEAKS AND IS CURRENTLY IN A STEADY/IDLE STATE.