CONSOLIDATED EDISON CO OF NEW YORK

Incident Narrative

ON AUGUST 16, 2012 AT 12:54 PRESSURE CONTROL REPORTED TO THE GAS EMERGENCY RESPONSE CENTER (GERC) AN OUTSIDE LEAK AT 4"" TRANSMISSION INLET V-43662 WHILE PERFORMING AN INSPECTION OF REGULATOR STATION GR-149 AT BAYCHESTER AVE. AND NEREID AVE. IN BRONX, NEW YORK. GAS DISTRIBUTION SERVICES (GDS) RESPONDED AND INVESTIGATED THE AREA. CONTINGENCY CASE 16-A WAS INITIATED AND 4"" REMOTE INLET V-6423 AND 24"" V-6408 WERE INSPECTED FOR CONTINGENCY. A BAR-HOLE SURVEY WAS COMPLETED AND AT 15:02 V-6423 WAS CLOSED ISOLATING APPROXIMATELY 30' OF 178 PSI INLET PIPING TO GR-149. GAS CONTROL REPORTED GR-174 AND GR-141 WERE ALSO SUPPORTING THE AREA AND THERE WAS NO SYSTEM IMPACT FROM ISOLATING GR-149. PRESSURE IN THE AFFECTED SEGMENT WAS REDUCED TO APPROXIMATELY 90 PSI. GAS CONSTRUCTION EXCAVATED AND AT 16:56 A VISIBLE LEAK ON THE BODY OF V-43662 WAS REPORTED. ADDITIONAL RESEARCH WAS PERFORMED TO DETERMINE IF A REPAIR CAN BE MADE OR IF THE VALVE WILL BE REPLACED. THE MAIN PRESSURE IN THE AFFECTED SEGMENT WAS REDUCED TO 5 PSI AND THERE WAS A MINOR LEAK WHICH GDS SURVEILLED UNTIL A REPAIR WAS COMPLETED. MULTIPLE REPAIR ATTEMPTS WITH THE CAMERON VALVE REPRESENTATIVE PRESENT WERE UNSUCCESSFUL. ON 8-29-12 IT WAS DETERMINED THE VALVE WAS TO BE CUT-OUT AND REPLACED. ON 9-2-12, V-43662 WAS CUT OUT ON PROCEDURE MPC-12-25 AND REPLACEMENT V-59674 WAS INSTALLED. TRANSMISSION PRESSURE WAS RETURNED TO THE AFFECTED SEGMENT OF PIPING AND AT 01:30 ON 9-3-12 THE SERIOUS LEVEL STATUS WAS TERMINATED. THERE WERE NO INJURIES, EVACUATIONS OR SYSTEM IMPACT REPORTED. THE US DOT, NYS PSC, NYC DEP AND FDNY WERE NOTIFIED AND THE PSC RESPONDED TO LOCATION. THIS WAS A SERIOUS LEVEL INCIDENT. NOTE--GAS DISTRIBUTION INCIDENT REPORT WAS GENERATED TO REPLACE GAS TRANSMISSION INCIDENT REPORT 20120092-15812