ALLIANT GAS

Incident Narrative

ALLIANT GAS WAS NOTIFIED OF A LEAKING TANK OUTSIDE THE RESIDENCE OF 201 E ZURICH STREET IN PAYSON AZ, BY LOCAL EMERGENCY RESPONDERS AT AROUND 5:30 PM (MST) ON 11-5-16. UPON ARRIVAL OF ALLIANT'S ON-CALL PIPELINE TECH, IT WAS DETERMINED THERE WAS NOT A TANK LEAK, BUT A POTENTIAL PROPANE GAS PIPELINE LEAK. ALLIANT'S PIPELINE TECH CALLED OUT ADDITIONAL SUPPORT TO INVESTIGATE THE POTENTIAL LEAK. WHILE CONDUCTING THE INVESTIGATION OF THE LEAK, AN EXPLOSION OCCURRED CAUSING INJURIES OF VARYING DEGREES TO BOTH THE BUILDING OCCUPANTS AND THE ALLIANT EMPLOYEES. 911 WAS CALLED AND THE FIRE DEPARTMENT RESPONDED TO FIGHT THE FIRE. ALLIANT IMMEDIATELY BEGAN RESPONDING TO THE NEXT LEVEL OF THEIR EMERGENCY PLAN AND CALLING IN ADDITION RESOURCES. ALLIANT CREWS WORKED TO ISOLATE ALL OF THE COMPANY'S PIPELINES IN THE AREA OF 201 ZURICH DRIVE AND WAS ABLE TO HAVE THE LEAK ISOLATED BY 0130 ON NOVEMBER 6, 2017. AN INVESTIGATION WAS LAUNCHED AS SOON AS THE EMERGENCY RESPONSE WAS COMPLETED. THE INVESTIGATION REVEALED THAT THE LEAK OCCURRED AS A RESULT OF AN INTERNAL FRACTURE OF THE ADYL A PIPE. ALLIANT GAS HAS REVIEWED AND REVISED ITS EMERGENCY PLANS TO ENSURE THE SAFETY OF THE COMMUNITY. ALLIANT HAS CONTINUED TO FOLLOW ITS DIMP PLAN FOR THE REPAIR AND REPLACEMENT OF THE ADYL A PIPE. PART A #4 IS CONFIRMED AT 11/05/2016 20:11 AZ TIME. #7 IS CONFIRMED AT 11/05/2016 22:11 AZ TIME. #13A IS CONFIRMED ALL THREE PIPELINES LEADING TO THE INCIDENT WERE SHUT DOWN 11/06/2016 01:30 AZ TIME. #17A IS CONFIRMED AT 11/05/2016 20:11 AZ TIME WHEN INCIDENT MET ANY REPORTABLE CRITERIA. #17B IS CONFIRMED AT 11/05/2016 17:50 AZ TIME IS WHEN ALLIANT'S TECH FIRST ARRIVED ON SITE TO EVALUATE AND FIND IT NOT TO BE A SINGLE FAMILY PROPANE TANK BUT A UNDERGROUND PIPELINE CALL. PART F #1 IS CONFIRMED UNDER PART 199.2 APPLICABILITY (B)(2) DOES NOT APPLY.