FLORIDA GAS TRANSMISSION CO

Incident Narrative

09/10/20 AT 00:47 AM EASTERN FGT GAS CONTROL DETECTED A LOW PRESSURE ALARM AT THE DEBARY POWER PLANT. INVESTIGATION BY FIELD OPERATIONS CONFIRMED A FAILURE ON THE 12IN SANFORD LATERAL THAT HAD IGNITED. 09/10/20 AT 02:35 AM EASTERN LOCAL EMERGENCY RESPONDER MADE CONTACT WITH FGT PERSONNEL ON THE SCENE. THE LOCATION OF THE INCIDENT IS IN SEMINOLE COUNTY IN THE NORTHERN PART OF THE ORLANDO METROPOLITAN AREA. THE INCIDENT OCCURRED IN A POWER LINE CORRIDOR AND RESULTED IN DAMAGE TO A DUKE ENERGY 230KV TRANSMISSION LINE. THE PIPELINE WAS ISOLATED AT APPROXIMATELY 2:08 AM. 09/10/20 AT 07:55 AM EASTERN - THREE MARLIN CNG TRUCKS ARRIVED ON SITE AND WAS ABLE TO MOBILIZE ADDITIONAL TANKERS TO THE METER STATIONS TO MEET THE SUPPLY NEEDS FOR FPU CUSTOMERS. 09/10/20 AT 16:00 PM CONSTRUCTION UNDERWAY TO RETURN THE UPSTREAM PORTION OF THE 12IN SANFORD LATERAL TO SERVICE AT A REDUCED PRESSURE (344 PSIG). THIS IS 50% OF THE OPERATING PRESSURE AT THE TIME OF THE FAILURE. UPSTREAM SECTION IS CURRENTLY IN-SERVICE AT 50% MAOP. DOWNSTREAM FAILED SECTION IS STILL OUT OF SERVICE AND ISOLATED. THE ISOLATED SEGMENT IS UNDER A PHMSA CORRECTIVE ACTION ORDER AND THE FAILED PIPE IS UNDERGOING METALLURGICAL ANALYSIS, A SUPPLEMENTAL INCIDENT REPORT WILL BE FILED ONCE THE CAUSE IS DETERMINED. UPDATE: THE PIPELINE HAS SINCE BEEN REPAIRED BY REPLACING THE FAILED SECTION AND WAS RESTARTED ON 11/24/2020 UNDER THE CORRECTIVE ACTION ORDER. THE FAILED SECTION WAS SENT TO A METALLURGICAL LABORATORY FOR ANALYSIS AND VIA THAT ANALYSIS, THE FAILURE WAS IDENTIFIED TO BE NEAR NEUTRAL PH STRESS CORROSION CRACKING.