Railroad Commission of Texas Pipeline Evaluation System Investigation Report Inspection Package ID = 32331 6/15/18 3:14 PM Incident ID: Page 1 of 4 93 Contacts Company ID: 6776 Company Name: ATMOS ENERGY CORP., MID-TEX DIVISION Alternate Company Name: Contact Type Name Pipeline Operator Al Hernandez Onsite Contact Jerry kemp Company / Affiliation ATMOS ENERGY CORP., MID-TEX DIVISION ATMOS ENERGY CORP., MID-TEX DIVISION Incident Detail Investigation Status: Closed Date of Incident: 5/29/07 5:04 PM Drill? No Date Reported: 5/29/07 6:35 PM Inspector Notified Date: 5/29/07 8:00 PM Assigned Inspector: Jody Kerl Incident Location Nearest City: Cleburne Location/Street Address: 632 Woodard Region: Fort Worth County: JOHNSON Phone Number 469-442-5146 214-316-4562 Railroad Commission of Texas Pipeline Evaluation System Investigation Report Inspection Package ID = 32331 6/15/18 3:14 PM Incident ID: Page 2 of 4 93 Notes Synopsis On Tuesday, May 29, 2007, at approximately 5:04 p.m., a structure fire and explosion occurred at 632 Woodard Ave. in Cleburne, Texas. There were three injuries and two fatalities as a result of the incident. Natural gas concentrations were found along the street in front of the residence and gas migration was detected along the driveway and towards the house. Subsequent investigation revealed natural gas leaks were found on a vacant service stub compression coupling and two vacant service taps. That natural gas distribution system is owned and operated by Atmos Energy Corp. Railroad Commission of Texas Pipeline Evaluation System Investigation Report Inspection Package ID = 32331 6/15/18 3:14 PM Incident ID: Page 3 of 4 93 Operator - 30 Day Report Part A-Key Report Information by operator Report is final? Yes OPS Operator Identification Number: NRC Number (from Incident Detail): Volume of commodity released unintentionally: Volume of commodity released intentionally: Volume of commodity recovered: Fatalities? Yes Operator employees: Contractor employees working for the Operator: Non-Operator emergency responders: Workers working on the right-of-way, but NOT associated with this Operator: General Public: 2 Total Fatalities: 31348 0 0 0 Injuries requiring inpatient hospitalization? Yes Operator employees: Contractor employees working for the Operator: Non-Operator emergency responders: Workers working on the right-of-way, but NOT associated with this Operator: General Public: 3 Total Injuries: Part C-Additional Facility Information by operator Incident Occured On: Failure Occured On: Material Involved: Install Year: Part D-Additional Consequence Information by operator HCA or USA? No Public and non-operator costs: Cost of commodity unintentionally released: Cost of commodity intentionally released: Cost of property damage and repair: Cost of emergency response: Cost of environmental remediation: Other costs: Total costs: Part G-Apparent Cause from operator Incident Cause (Confirmed): Other Incident Cause Investigation complete Sub-cause: Unknown Part H-Operator Incident Summary THE CAUSE OF THE LEAK IS STILL UNDER INVESTIGATION. WHAT IS KNOWN AS OF THE DATE OF THIS REPORT IS THAT GAS WAS ESCAPING FROM A COMPRESSION COUPLING CONNECTING THE SERVICE STUB TO THE TAP. AN EXPLOSION OCCURRED AT 632 WOODARD ST. Railroad Commission of Texas Pipeline Evaluation System Investigation Report Inspection Package ID = 32331 6/15/18 3:14 PM Incident ID: Page 4 of 4 93 UPDATE - 2/20/09 - THE CAUSE OF THIS EVENT APPEARS TO BE THE RESULT OF A COMBINATION OF FACTORS THAT WAS NOT READILY FORESEEABLE. DURING ATMOS ENERGY CORPORATION'S INVESTIGATION SUBSEQUENT TO THE INCIDENT, THREE LEAKS WERE FOUND AND REPAIRD ON WOODARD AVENUE. HOWEVER, THERE IS INSUFFICIENT EVIDENCE TO SUPPORT THAT GAS ESCAPING FROM THESE LOCATIONS (632 WOODARD, 634 WOODARD, 700 WOODARD) WAS SIGNIFICANT ENOUGH TO RELEASE GAS RAPIDLY ENOUGH TO HAVE CAUSED THE INCIDENT. ADDITIONALLY, THE LEAK LOCATED POST-ACCIDENT AT 632 WOODARD WAS DETERMINED TO HAVE BEEN CAUSED BY A MANUFACTURING OR MACHINING DEFECT IN THE RELAVANT COUPLING THAT WAS VISIBLE TO THE ORIGIONAL INSTALLER. ATMOS ENERGY CORPORATION'S INVESTIGATION HAS ALSO RESULTED IN THE DETERMINATION THAT THE OCCUPANTS OF 632 WOODARD WERE AWARE OF A POTENTIAL HAZARD WHEN THEY CONTACTED LOCAL FIRE AUTHORITIES, BUT DISREGARDED IN STRUCTIONS BY SUCH AUTHORTIES IN LIGHTING ADDITIONAL CIGARETTES.