ENERGY TRANSFER COMPANY

Incident Narrative

ON APRIL 14, 2024, AT 9:43AM ENERGY TRANSFER RECEIVED A NOTIFICATION FROM THE PRODUCER SM ENERGY OF A POSSIBLE LEAK IN THE AREA. ET PERSONNEL ARRIVED ON SITE TO INVESTIGATE AT 11:00AM. AT 11:11AM ET PERSONNEL SHUT IN THE BRISCOE R 21H. THIS IS A 10-INCH TYPE C GAS GATHERING LINE IN A RURAL AREA LOCATED IN WEBB COUNTY NEAR LAREDO, TX. AFTER THE LINE WAS EXCAVATED AND EXPOSED, ET WAS ABLE CONFIRM DISCOVERY ON APRIL 15, 2024 AT 9:00AM. THE LOCATION OF THE LEAK WAS DISCOVERED AT 28.069722, - 99.934444. UPON CONFIRMED DISCOVERY IT WAS DETERMINED THAT THIS INCIDENT WOULD BE REPORTABLE DUE TO THE ESTIMATE OF PROPERTY DAMAGE AND REPAIR COST. THIS INCIDENT WAS REPORTED TO THE NRC ON APRIL 15, 2024, AT 10:04AM AN ESTIMATED 22.5 MCF OF GAS WAS UNINTENTIONALLY RELEASED. THE LINE WAS EXCAVATED, AND COUPONS WERE SENT TO ADV INTEGRITY FOR 3RD PARTY ANALYSIS. FAILURES WERE FOUND TO BE AT THE 6 OCLOCK POSITION; TWO OF THE PITS MEASURED ABOUT 1/4-INCH IN DIAMETER, WHILE THE OTHER PIT MEASURED 1/8-INCH IN DIAMETER. SEDIMENT WAS FOUND, REMOVED, AND ANALYZED AT THE 6 OCLOCK POSITION OF THE PIPELINE. THE FINDINGS SHOWED THE SEDIMENT HAD PRESENCE OF SIDERITE. AFTER REVIEWING OPERATIONAL AND HISTORICAL RECORDS ALONG WITH A LAB ANALYSIS WE HAVE CONCLUDED THAT THE COMBINATION OF SIDERITE, SAND, IRON SULFIDE, AND OTHER DEBRIS LED TO UNDER DEPOSIT CORROSION AND TO AN EVENTUAL FAILURE. THIS LINE IS CURRENTLY NON-PIGGABLE . OUR EFFORTS TO MITIGATE THIS ISSUE IS TO MODIFY OUR QUARTERLY MAINTENANCE PLAN BY INCORPORATING CHEMICAL TREATMENT FOR IRON SULFIDE AND SOLID DEPOSITS.