ENBRIDGE HOLDINGS (GRAY OAK) LLC

Incident Narrative

ON APRIL 13, 2024, AT APPROXIMATELY 10:59 AM CDT A THIRD-PARTY PIPELINE OPERATOR VISUALLY CONFIRMED A RELEASE AT THE ENLINK HIGH LONESOME TAKE-OFF FACILITY. THE CONTROL CENTER IMMEDIATELY SHUT DOWN THE FACILITY AND AN ENBRIDGE TECHNICIAN WAS SENT OUT TO INVESTIGATE. THE TECHNICIAN ARRIVED ONSITE AT 12:30 PM CDT AND CONFIRMED THAT THERE WAS A RELEASE OF APPROXIMATELY 35 GALLONS OF CRUDE OIL AT THE METER SKID. OPERATIONS PERSONNEL WERE DISPATCHED TO THE SITE FOR CLEAN-UP AND REMEDIATION. THE SOURCE OF THE RELEASE WAS IDENTIFIED AS A 1/2 INCH STAINLESS STEEL TUBING LINE THAT HAD PULLED LOOSE FROM A SWAGELOK FITTING ON THE METER SKID. THE TUBING WAS RECONNECTED AND PROPERLY TIGHTENED USING A SWAGELOK GAUGE. THE RAILROAD COMMISSION OF TEXAS WAS NOTIFIED ON APRIL 13, 2024, AT 11:43 AM CDT (REPORT # 3075). THE NRC WAS NOTIFIED ON APRIL 13, 2024, AT 11:59 AM CDT (NRC # 1396326) IN CASE THE RELEASE WOULD EXCEED THE COST REPORTING THRESHOLD. A 48-HOUR UPDATE TO THE NRC WAS MADE ON APRIL 15, 2024, AT 10:29 AM CDT (NRC# 1396456). AFTER FURTHER INVESTIGATION THE CAUSE WAS DETERMINED TO BE DUE TO THE FERRULE NOT BEEN PROPERLY SEATED DURING ORIGINAL CONSTRUCTION OF THE METER SKID WHICH WOULD HAVE BEEN PERFORMED BY A THIRD PARTY IN 2019. ALL OTHER TUBING CONNECTIONS WERE CHECKED WITH A GAUGE, AND SEVERAL WERE RESEATED. ALL CONTAMINATED SOIL WAS REMOVED FROM THE RELEASE SITE AND PROPERLY DISPOSED OF AT A DESIGNATED DISPOSAL FACILITY.