COLUMBIA GAS OF OHIO INC

Incident Narrative

COLUMBIA GAS OF OHIO INVESTIGATORS AND OTHER INTERESTED PARTIES MET ON JANUARY 28, 2013 TO PERFORM AN INVESTIGATION REGARDING THE INCIDENT. AS A RESULT OF THIS INVESTIGATION, THE PARTIES CONCLUDED THAT THE CAUSE OF THIS EXPLOSION CANNOT BE ASCERTAINED. THE BUILDING'S COMPROMISED STRUCTURAL CONDITION LIMITED ANY INTERNAL BUILDING INVESTIGATION. THE BUILDING WAS DEMOLISHED THE SAME DAY AS A RESULT OF ITS UNSAFE CONDITION. DURING THE COLUMBIA GAS OF OHIO SERVICE LINE TEST FOR 21 HARRISON ST., A MINUTE, NON-CAUSAL LEAK WAS DISCOVERED 34 FEET FROM THE BUILDING FOUNDATION THAT COULD NOT HAVE BEEN THE SOURCE OF THE EXPLOSION. A SECTION OF SERVICE PIPE, INCLUDING A COUPLING AND CURB VALVE, WAS REMOVED, IN THE AREA OF THIS LEAK, AND A SUBSEQUENT LAB TEST WAS PERFORMED ON FEBRUARY 6, 2012. THE RESULTS OF THE TEST CONFIRMED A MINUTE, NON-CAUSAL LEAK. OUR POST-INCIDENT LEAKAGE INVESTIGATION DID NOT REVEAL ANY MIGRATION OF NATURAL GAS TOWARDS THE VICINITY OF THE BUILDING'S FOUNDATION. COLUMBIA CONSIDERS THIS TO BE THE FINAL DETERMINATION AND THIS REPORT SHOULD BE CONSIDERED FINAL.