TEXAS GAS TRANSMISSION, LLC

Incident Narrative

ON APRIL 21, 2019 AT APPROXIMATELY 4:00 PM, TEXAS GAS TRANSMISSION RECEIVED NOTIFICATION FROM AN INDIVIDUAL WHO WAS RIDING A FOUR WHEELER NEAR THE RIGHT-OF-WAY THAT HE OBSERVED SMALL BUBBLES IN A MUD HOLE. ON APRIL 22, METHANE WAS DETECTED IN THE AREA USING MULTIPLE LEAK DETECTORS BUT BECAUSE OF RECENT FLOODING, IT COULD NOT BE ASSUMED THAT THIS REPRESENTED A NATURAL GAS LEAK. ON APRIL 23 AT APPROXIMATELY 8:10, OPERATIONS PERSONNEL CONFIRMED A POSSIBLE LEAK WITH LEAK DETECTOR. OPERATIONS NOTIFIED PIPELINE SERVICES , THE LINE WAS ISOLATED AND PRESSURE WAS REDUCED FROM 660 PSIG TO 300 PSIG. ON APRIL 23, 2019 AT APPROXIMATELY 11:00 AM, PIPELINE SERVICES BEGAN AN INVESTIGATIVE DIG WHICH CONFIRMED A PINHOLE LEAK IN AN EXISTING WELD ON THE MLS 26-2. THE LINE WAS BLOWN DOWN TO 0 PSIG AT 4:29 PM ON APRIL 23. AFTER EVALUATION, IT WAS DETERMINED THAT ESTIMATED REPAIR COSTS MAY EXCEED $50,000, THUS, MEETING THE PHMSA INCIDENT DEFINITION AND THE NRC WAS CONTACTED. A SECTION OF PIPE WAS CUT OUT, THE LINE WAS PURGED AND PACKED AND PLACED BACK INTO SERVICE ON APRIL 29, 2019 AT 11:00. 6-28-19 UPDATE TO SUBMIT FINAL REPORT. UPDATED PART C TO INDICATE INCIDENT OCCURRED ON PIPE INSTEAD OF WELD AND SUB-CAUSE BASIS TO INCLUDE METALLURGICAL ANALYSIS AS REQUESTED BY PHMSA. ACTUAL COSTS ARE NOW REPRESENTED AND PIR WAS CONFIRMED AS REQUESTED BY PHMSA.