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CONSOLIDATED EDISON CO OF NEW YORK

gas_distribution Incident — SCARSDALE, NY

Incident Information

Report Date—
OperatorCONSOLIDATED EDISON CO OF NEW YORK
Commodity—
Pipeline Typegas_distribution

Location

CitySCARSDALE
StateNY
CountyWESTCHESTER
Coordinates40.98877, -73.80875

Cause

CauseEQUIPMENT FAILURE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

Property Damage—
Lost Commodity—
Public/Private Damage—
Emergency Response—
Environmental Remediation—
Other Costs—

Location Map

Incident Narrative

ON WEDNESDAY NOVEMBER 21, 2012 AT 09:16 WESTCHESTER GAS CONSTRUCTION REPORTED A POSSIBLE TRANSMISSION LEAK AT 8"" V-28871 LOCATED AT THE INLET TO REGULATOR STATION GR-510 (TRANS-HP) AT POPHAM AVENUE AND SOUTH CHURCH LANE, SCARSDALE. A READING OF 3% WAS DETECTED UPSTREAM OF THE VALVE. A CODE MURRE (MULTIPLE RESOURCE RESPONSE EVENT) WAS INITIATED, AND GAS DISTRIBUTION SERVICES (GDS), THE EMERGENCY RESPONSE GROUP (ERG), PRESSURE CONTROL, TRANSMISSION ENGINEERING AND GAS CONTROL WERE NOTIFIED. AN OPERATIONAL PLAN WAS DEVELOPED AND 24"" V-26005 AND ROV 25934 WERE CLOSED AT 13:18 TO ISOLATE THE AFFECTED 212 PSI SEGMENT (245 PSI RATED). PRESSURE WAS REDUCED VIA GR-510 TO 65 PSI AT 15:12. THE LOCATION WAS MONITORED AND AROUND-THE-CLOCK OPERATIONS COMMENCED FRIDAY NOVEMBER 23, 2012 AT 06:00 HRS. GAS CONTROL DECLARED A CONDITION YELLOW AND ISSUED A LIMIT WORK ORDER TO ENSURE GAS SYSTEM SUPPLY. AT 17:10 ON NOVEMBER 23, 2012, A VISUAL LEAK WAS CONFIRMED ON THE BURIED DARLING GATE VALVE DIRECTLY UPSTREAM OF V-28871. AN OPERATIONAL PLAN WAS DEVELOPED FOR THE REPLACEMENT OF THE DARLING VALVE, V-28871 AND THE 1.5"" PURGE RISER ALL ASSOCIATED WITH THE 8"" SUPPLY TO GR-510. A NEW REMOTE INLET VALVE AND ASSOCIATED 8"" PIPE TOTALING 25' WAS FABRICATED AND THE PSC-WITNESSED TEST PASSED ON TUESDAY NOVEMBER 27, 2012. REPLACEMENT OF THE SEGMENT WAS COMPLETED AT 07:00 ON WEDNESDAY NOVEMBER 28, 2012. THE AFFECTED SEGMENT WAS RE-ENERGIZED INCREMENTALLY AND LEAK SURVEY CHECKED THE AREA AT EACH PRESSURE INCREASE AND NO LEAKS WERE DETECTED. AT 09:19 GAS CONTROL REPORTED THE TRANSMISSION SYSTEM WAS AT 219 PSI AND HAS RETURNED TO NORMAL OPERATING CONDITIONS. THE SCARSDALE FIRE DEPT. WAS ADVISED AND VISITED LOCATION FOR AN OPERATIONAL OVERVIEW. THE US DOT AND NYS PSC WERE NOTIFIED AND THE NTSB INQUIRED ABOUT THIS INCIDENT. THERE WERE NO INJURIES OR EVACUATIONS REPORTED. THIS WAS A SERIOUS LEVEL INCIDENT. NOTE--THIS GAS DISTRIBUTION INCIDENT REPORT WAS GENERATED TO REPLACE GAS TRANSMISSION INCIDENT REPORT 20120126-15817.

About This Pipeline Incident

Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.

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