EL PASO NATURAL GAS CO

Incident Narrative

ON JANUARY 10, 2017, EL PASO NATURAL GAS COMPANY, LLC (""EPNG"") GAS CONTROL WAS NOTIFIED BY A LOCAL LANDOWNER REPRESENTATIVE OF A NATURAL GAS LEAK AND SMALL FIRE AT APPROXIMATELY 11:50 AM MST. EPNG DISPATCHED OPERATING PERSONNEL TO THE SITE IMMEDIATELY. UPON THEIR ARRIVAL THEY MET WITH LOCAL FIRE AUTHORITIES, SECURED THE AREA, AND CONTACTED OTHER PIPELINE OPERATORS WITH PIPELINES KNOWN TO BE IN OR NEAR THE RIGHT-OF-WAY REGARDING THE OBSERVED LEAK. EPNG BEGAN INVESTIGATING THE SOURCE OF THE LEAK ONCE THE FIRE WAS EXTINGUISHED THAT SAME DAY. EPNG DETERMINED THE LOCATION OF THE LEAK ON LINE 1600 AT MILEPOST 578+1712 IN PINAL COUNTY, AZ, ON JANUARY 11, 2017 AT 10:00 AM MST AND AT 11:00 AM MST DURING THE EMERGENCY RESPONSE LINE (ERL) CALL IT WAS DETERMINED THAT THE RELEASE WOULD BE IN EXCESS OF 3,000 MCF REPORTING CRITERIA. AT THE CONCLUSION OF ITS INVESTIGATION, EPNG ESTIMATED THE UNINTENTIONAL RELEASE OF NATURAL GAS TO BE 3,764 MCF. EPNG COMPLETED ALL REPAIRS ON JANUARY 12, 2017 AND RETURNED LINE 1600 TO SERVICE ON JANUARY 12, 2017 AT 7:57 PM MST. THE ROOT CAUSE WAS A FAILURE OF THE PIPELINE DUE TO EXTERNAL CORROSION RESULTING IN LOCALIZED PITTING. THIS 30-DAY INCIDENT REPORT WAS UPDATED TO CORRECT THE TYPOGRAPHIC ERROR IN THE NRC REPORT DATE PROVIDED IN PART A, QUESTION 7 FROM 01/10/17 TO 01/11/17 AND CORRECT THE TIME ZONE FROM 13:17 PM EST TO 11:17 AM MST. ALSO, THIS REPORT INCLUDES A CHANGE IN THE TIME REPORTED IN RESPONSE TO PART A, QUESTION NO. 19B FROM 12:40 TO 12:30 AM MST AND THE RESPONSE TO PART A, QUESTION NO. 15A FROM 14:35 TO 14:30 PM MST AS THE TIME THE LINE SEGMENT WAS ISOLATED. THESE TIMES REFLECT THOSE REPORTED IN OUR FINAL INCIDENT TIMELINE.