CONSOLIDATED EDISON CO OF NEW YORK

Incident Narrative

AT 1408 HRS ON 5/20/2010 THE VILLAGE OF MAMARONECK FIRE DEPARTMENT ADVISED THE GERC OF A POSSIBLE EXPLOSION WITH GAS INVOLVEMENT. THE GERC DISPATCHED A GDS MECHANIC AND SUPERVISOR, GAS CONSTRUCTION AND A GAS ERG. GDS RESPONDED AND REPORTED THAT A GAS CONSTRUCTION CREW WAS ON LOCATION WORKING AN EXISTING TYPE 2 LEAK. THE INVESTIGATION INDICATED THAT THE CREW WAS PREPARING TO INSTALL AN EXPANSION STOPPER IN A 2"" STEEL SERVICE TEE ON A 4"" MEDIUM PRESSURE STEEL MAIN WHEN THE GAS IGNITED. TWO GAS CONSTRUCTION MECHANICS WERE TAKEN VIA EMS TO SOUNDSHORE HOSPITAL WHERE THEY WERE TREATED AND RELEASED. MECHANIC A RECEIVED SECOND DEGREE BURNS, WHICH WERE SEVERAL INCHES IN LENGTH TO HIS FOREARMS. MECHANIC B SUSTAINED A SECOND DEGREE BURN, WHICH WAS ALSO SEVERAL INCHES IN LENGTH TO HIS RIGHT FOREARM AND A SMALL FIRST DEGREE BURN NEAR THE BACK OF HIS NECK. THE MECHANICS WERE BOTH BROUGHT TO CON EDISON'S RYE SERVICE CENTER FOR DRUG AND ALCOHOL TESTING AND BOTH MEHANICS TESTED NEGATIVE. CHANNEL 12 NEWS ARRIVED ON LOCATION AT 14:56, THE LEAK WAS TEMPORARILY SECURED AT 15:10 AND THE AREA WAS MADE SAFE. CREWS THEN INSTALLED A MECHANICAL CONTROL FITTING, INSERTED AN EXPANSION STOPPER AND CLOSED ONE MAIN VALVE AT 20:15 TO ISOLATE THE MAIN, INTERRUPTING SERVICE TO FOUR (4) RESIDENTIAL CUSTOMERS. THE SECTION OF MAIN IN THE EXCAVATION WAS REMOVED AND TAKEN TO THE GAS DEVELOPMENT LAB FOR ANALYSIS. THE GAS WAS BACK ON LINE AT 21:50 AND SERVICE WAS RESTORED TO THE AFFECTED CUSTOMERS. AN ICS STRUCTURE WAS ESTABLISHED AND THE COMMAND POST WAS LOCATED IN FRONT OF 611 CLAFLIN AVE. THIS WAS AN UPGRADED LEVEL INCIDENT.