ENABLE GAS TRANSMISSION, LLC

Incident Narrative

ON 1/18/2019 ENABLE MIDSTREAM O&M TECHNICIANS WERE IN THE NEW BOSTON, TEXAS AREA PERFORMING MAINTENANCE AND NOTICED A SLIGHT GAS ODOR WHILE TRAVELING DOWN TEXAS STATE HIGHWAY 82. DUE TO CM-22 (4') BEING IN THE AREA, THE TECHNICIANS PERFORMED AN INSPECTION OF THE AREA USING GAS DETECTION EQUIPMENT. IT WAS CONFIRMED THAT CM-22 WAS LEAKING WITHIN A CASED RAILROAD CROSSING PARALLEL TO US HWY 82 NEAR NEW BOSTON TEXAS. THE TEAM CLOSED THE HWY TEMPORARILY WHILE THE LINE WAS ISOLATED AND BLOWN DOWN. THE ROAD WAS CLOSED AT 2:20 PM AND REOPENED AT 4:30 PM. A NEW BORE WAS PERFORMED AND THE FINAL TIE-INS WERE COMPLETED 1/22/2019. WHEN THE CARRIER PIPE WAS REMOVED THE PIPE WAS THOROUGHLY CLEANED AND INSPECTED, AND NO CORROSION WAS OBSERVED ON THE PIPE. DUE TO THIS, IT IS ASSUMED THERE IS A SMALL PINHOLE LEAK IN A WELD SOMEWHERE ON THE PIPE. THE PIPE WILL HAVE END CAPS WELDED ON AND PRESSURED UP TO DETERMINE WHERE THE LEAK IS COMING FROM. AN INITIAL CALL WAS PLACE TO THE NRC ON 1/18/2019 @ 16:50 (NRC# 1235534) AND A 48 HOUR FOLLOW UP WAS PLACED ON 1/20/2019 @ 08:26 (NRC# 1235618). A SUPPLEMENTAL REPORT WILL BE PROVIDED WHEN TESTING AND FINAL CONSTRUCTION COSTS ARE COMPLETED. 2/26/2019 SUPPLEMENTAL D.7.B CHANGED FROM $85,000 TO $170,000 D.7.C CHANGED FROM $500 TO $10,000 NARRATIVE - A THOROUGH REVIEW OF THE PIPE WAS PERFORMED AND CORROSION DEFECTS WERE NOT FOUND. THERE IS HIGH CONFIDENCE THAT THE LEAK IS DUE TO A PINHOLE IN A WELD AND WE WILL NOT BE MOVING FORWARD WITH WELDING THE PIPE BACK TOGETHER AND HYDROTESTING.