EXXONMOBIL PIPELINE COMPANY LLC

Incident Narrative

THE TRAP DOOR WAS REPLACED WITH A NEWLY DESIGNED ENCLOSURE ON AUGUST 28TH, 2024, AND THE TRAP WAS RECOMMISSIONED ON SEPTEMBER 19TH, 2024. UPDATES MADE TO THIS REPORT: -UPDATED TOTAL COSTS -UPDATED THIS NARRATIVE ABOVE INCIDENT SUMMARY: ON TUESDAY, JULY 30, 2024, A CREW ARRIVED ONSITE TO REMOVE A CLEANING PIG FROM THE SCRAPER TRAP DOOR AT THE TEXAS CITY SCRAPER TRAP SITE. (IN ACCORDANCE WITH A 3RD PARTY LEASE AGREEMENT). THE CREW COMPLETED LOTO/DRAIN-UP, OPENED THE TRAP DOOR, INSTALLED A NEW O-RING PER PROCEDURES, AND CLOSED THE TRAP DOOR. THE LINE WAS RESTARTED ON JULY 31ST PER SCHEDULE AND A THIRD-PARTY OPERATOR IDENTIFIED THAT THE TRAP DOOR, WHICH IS LOCATED WITHIN A THIRD-PARTY FACILITY, WAS LEAKING. THE LINE WAS IMMEDIATELY SHUTDOWN AFTER IDENTIFICATION. THE RELEASE WAS CONTAINED ALL ONSITE AND CLEANED UP. ROOT CAUSE: THE SCRAPER TRAP DOOR PINCHED/STRESSED THE O-RING AT THE 12 O'CLOCK POSITION CAUSING FAILURE OF THE SEAL AND RELEASE OF CRUDE OIL. CONTRIBUTING FACTORS: O-RING POSITION ON THREADS INCREASES LIKELIHOOD OF DAMAGE DURING DOOR CLOSURE. PREVENTING RE-OCCURRENCE: THE SCRAPER TRAP DOOR WAS REPLACED ON AUGUST 28TH, 2024, WITH A NEW TRAP DOOR THAT WILL REDUCE THE LIKELIHOOD OF A PINCHED O-RING DURING CLOSURE.