SABAL TRAIL TRANSMISSION, LLC (SPECTRA ENERGY PARTNERS, LP)

Incident Narrative

ORIGINAL REPORT: AT 2:00 PM ON SEPTEMBER 29, 2018, AN APPARENT LIGHTNING STRIKE AT OR NEAR THE ENBRIDGE SABAL TRAIL HILDRETH COMPRESSOR STATION IN O'BRIEN, FLORIDA CAUSED A FUSE ON A SAFETY DEVICE CIRCUIT INSIDE THE COMPRESSOR BUILDING TO BLOW. THIS CAUSED A 2-INCH FUEL GAS VALVE TO FAIL IN THE OPEN POSITION VENTING NATURAL GAS OUTSIDE THE COMPRESSOR BUILDING TO THE ATMOSPHERE. AT 9:48 AM ON SEPTEMBER 30, 2018 AN ENBRIDGE EMPLOYEE WAS ADVISED BY A NEARBY LANDOWNER ABOUT A NOISE COMING FROM THE COMPRESSOR STATION. ANOTHER ENBRIDGE EMPLOYEE WAS DISPATCHED TO THE COMPRESSOR STATION AND ISOLATED THE GAS RELEASE AT 10:20 AM ON SEPTEMBER 30, 2018. THE EVENT RESULTED IN A NATURAL GAS RELEASE OF 26.4 MILLION CUBIC FEET. SUPPLEMENTAL REPORT: 48 HR NRC REPORT 1226485 THE TIME LAG BETWEEN THE FIELD OPERATING PERSONNEL IDENTIFYING THE GAS RELEASE AT THE SABAL TRAIL HILDRETH COMPRESSOR STATION AND THE INITIAL REPORT TO THE NATIONAL RESPONSE CENTER (NRC) HAS IDENTIFIED THE NEED TO ADDITIONAL TRAINING AND AWARENESS OF THE REQUIREMENT TO IMMEDIATELY REPORT SUCH EVENTS TO INTERNAL PERSONNEL RESPONSIBLE FOR NRC NOTIFICATIONS. THE TRAINING WILL BE DEVELOPED AND IMPLEMENTED SYSTEM-WIDE IN 2019.