ENTERPRISE PRODUCTS OPERATING LLC

Incident Narrative

AT 2124 ON 3/30/2018, CONTROLLER TRIED TO REMOTE START A COMPRESSOR UNIT WITH NO RESPONSE. CONTROLLER TRIED TO START THE UNIT A SECOND TIME WITH NO RESPONSE AND DISPATCHED A TECHNICIAN. WHEN THE TECHNICIAN ARRIVED AT 2307, THE TECHNICIAN DISCOVERED THAT THE SUCTION VALVE TO THE UNIT WAS NOT FULLY CLOSED AND THAT NATURAL GAS WAS RELEASING FROM THE VENT VALVE ON THE UNIT. THE TECHNICIAN CLOSED THE VALVE AND THE RELEASE STOPPED. AT 0030 ON 03/31/2018, IT WAS ESTIMATED THAT 52.7 MMCF OF GAS WAS RELEASED AND THE NRC/TRRC WAS NOTIFIED. THE RELEASE ESTIMATE WAS REVISED TO 13.2 MMCF AFTER THE VALVE WAS FOUND TO BE PARTIALLY OPEN. TIME OF THE INCIDENT (PART A, #4) IS ESTIMATED BASED ON TOTAL RELEASE VOLUME. INSPECTION OF THE VALVE IDENTIFIED THE HARD STOPS WERE OUT OF ADJUSTMENT CAUSING THE VALVE TO NOT FULLY CLOSE. THE VALVE WAS REPAIRED AND TESTED PRIOR TO BEING RETURNED TO SERVICE. THE TRRC WAS NOTIFIED ON 3/31/2018 AT 0057 AND A 48 HOUR COURTESY UPDATE ON 04/01/2018 AT 1913. 48-HOUR NRC# 1208229 SUPPLEMENTAL NOTIFICATION WAS MADE 04/01/2018 AT 1905. 12/04/2018 UPDATE - ADDED MORE SIGNIFICANT FIGURES TO LAT/LONG TO PROVIDE MORE ACCURATE LOCATION OF INCIDENT.