CONSOLIDATED EDISON CO OF NEW YORK

Incident Narrative

AT 07:52 ON AUGUST 24, 2019, THE CROTON-ON-HUDSON FIRE DEPARTMENT (CHFD) CONTACTED CON EDISON'S GAS EMERGENCY RESPONSE CENTER (GERC) AND REPORTED A BUILDING FIRE AT 1007 HALF BAY MOON DRIVE. THE GERC IMMEDIATELY DISPATCHED CON EDISON GAS DISTRIBUTION SERVICES (GDS) PERSONNEL AND SUPERVISORS TO THE LOCATION. THE BUILDING INVOLVED WAS SUPPLIED BY A 1-INCH HIGH-PRESSURE HIGH-DENSITY POLYETHYLENE (HDPE) GAS SERVICE (INSTALLED IN 2004). AT 07:58, THE CHFD REPORTED A SECONDARY GAS IGNITION AT THE METER SET UP LOCATED OUTSIDE THE BUILDING. ADDITIONAL CON EDISON PERSONNEL FROM GDS, GAS CONSTRUCTION, AND THE GAS EMERGENCY RESPONSE GROUP (ERG) WERE THEN DISPATCHED TO THE LOCATION BY THE GERC. GDS ARRIVED AT 08:06 AND CONFIRMED THE REPORTED SECONDARY GAS IGNITION. AT 08:35, GDS CLOSED THE CURB VALVE ON THE 1-INCH HDPE GAS SERVICE TO 1007 HALF BAY MOON DRIVE, THEREBY EXTINGUISHING THE SECONDARY FIRE AT THE OUTDOOR GAS METER SET UP; HOWEVER, THE STRUCTURAL FIRE REMAINED ONGOING AT THAT TIME. AS A PRECAUTION, GDS ALSO CLOSED THE HEAD-OF-SERVICE VALVES TO 1004, 1005, AND 1006 HALF MOON BAY DRIVE AT THEIR OUTDOOR METER SETS. IN ADDITION, NEARBY RADIAL HIGH-PRESSURE MAIN VALVE #39289 WAS LOCATED AND STAFFED FOR CONTINGENCY ISOLATION PURPOSES. AT 11:25, GDS REPORTED THAT THE CHFD HAD EXTINGUISHED THE STRUCTURAL FIRE. A SPECIAL LEAK SURVEY WAS PERFORMED BY CON EDISON AND NO GAS ODORS OR READINGS WERE DETECTED. GDS PERFORMED AN INTEGRITY TEST ON THE HOUSE PIPING INSIDE 1007 HALF MOON BAY DRIVE DOWNSTREAM OF THE GAS METER AND THE TEST PASSED. CON EDISON GAS CONSTRUCTION ALSO PERFORMED A PRESSURE TEST ON THE GAS SERVICE LINE, FROM THE CURB VALVE TO THE HEAD-OF SERVICE VALVE, UNDER LINE PRESSURE (60 PSI), AND THE TEST PASSED. PRESSURE AND ODORANT READINGS WERE WITHIN THE ACCEPTABLE RANGES. CON EDISON PERSONNEL CUT AND CAPPED THE GAS SERVICE LINE TO 1007 HALF MOON BAY DRIVE AT THE CURB VALVE AND ISSUED A WARNING TAG. BASED ON THEIR INVESTIGATION, THE CHFD REPORTED THE PRIMARY CAUSE OF THE FIRE IS UNDETERMINED. IT WAS NOTED, HOWEVER, THAT INTERIOR RENOVATIONS WERE ONGOING IN 1007 HALF MOON BAY DRIVE AT THE TIME OF THE FIRE. THERE WERE NO REPORTED INJURIES. MULTIPLE MEDIA OUTLETS WERE ON LOCATION. NYSPSC AND USDOT WERE NOTIFIED. NYSPSC RESPONDED TO THE LOCATION.