Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2021-11-07 — NY
Operator
Consolidated Edison Co Of New York
Cause
Other Outside Force Damage
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$91,885
Incident datetime
2021-11-07 13:49
Report number
Location
NY
Narrative
On 11/6/21 at 07:26, con edison's gas emergency response center (gerc) received a report from its customer ops. Call center of a gas odor inside and outside of a residential building located at 733 park ave. The gas odor had been reported to the call center by an occupant of the same building. The area is supplied by a 6-inch low-pressure cast iron gas main (installed in 1897) and a 30-inch steel gas transmission main (installed in 1959), as well as underground electric facilities. Con edison gas distribution services (gds) responded to the location, investigated, and reported a type 1 gas leak, with a natural gas reading of 0.4% detected in the gas point-of-entry (poe) at 733 park avenue. Additionally, gds detected natural gas readings of 15% in two nearby electric subsurface structures (sss's) manhole #m41786 and service box #12935; the covers of those two sss's were remove by gds for venting. The gerc then initiated a code murre, notified the fdny, and dispatched additional con edison gds supervision to the location. Upon further investigation, gds detected natural gas readings of 0.3% in the atmosphere of two building basements at 106 & 110 e. 71st street. Gds sealed the electric poe's to those buildings and vented the readings in the two basements to 0% with assistance from the fdny. Gds reported that all other buildings and adjacent sss's were clear of gas readings, and that electric mh #m41786 and sb #12935 had been vented to 0%. Con edison emergency gas construction personnel were dispatched to the location to pinpoint the source of the leak. On 11/7/21 at 00:50, emergency gas construction reported finding a potential leak on the 30-inch transmission main after detecting natural gas readings of ~100% in the vicinity of the main. All adjacent sss's, buildings, and protection test points were checked and found to be clear of gas readings. The transmission main was operating at ~300 psig. No outages or negative gas system impact were reported. Gas transmission engineering and gas control were notified of the potential transmission main leak. Contingency case 6-c was established and put into effect, and gas operations personnel were assigned to staff multiple main valves as part of the contingency. Gas operations crews remained on location and monitored the condition throughout the night. On 11/7/21 at 13:49, two transmission main valves were closed to isolate a segment of the 30-inch transmission main due to the leak condition, which appeared to progressively worsen. The isolation of the transmission main interrupted service to fifteen (15) gas services and nine hundred thirty-two (932) customers. Con edison gas control issued a limit work order and a condition yellow system status. Construction activities began and the coating on the transmission main was safely removed. Once fully exposed, a leak was found on the transmission main at the 1 o'clock position. A nitrogen barrier was installed, and a high hat (a permanent steel cap) was welded over the leak that was found on the body of the transmission main. A pressure test was conducted, and the test passed. Transmission pressure was reintroduced to the main up to full operating pressure (327 psig) at 50 psig increments with leak surveys conducted over the affected area at every incremental pressure increase, without any further leaks detected. The repair procedure was successfully completed, and service was safely restored on 11/9/21 at 18:09. The suspected cause of the natural gas leak was a high-pressure steam leak that was blowing directly on the gas transmission main. There were no reported injuries or evacuations associated with this incident. Notifications were made to psc, dep and PHMSA.
Detailed record list
Report Received Date
2021-12-07 00:00:00
Iyear
2021
Report Number
20210113
Supplemental Number
36246
Report Type
Supplemental Final
Operator Id
2704
Name
Consolidated Edison Co Of New York
Operator Street Address
4 Irving Place
Operator City Name
New York
Operator State Abbreviation
NY
Operator Postal Code
10003
Local Datetime
2021-11-07 13:49:00
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
40.7703867
Location Longitude
-73.9642324
Nrc Rpt Num
1321382
Nrc Rpt Datetime
2021-11-07 14:10:00
Commodity Released Type
Natural Gas
Unintentional Release
850
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2021-11-07 13:49:00
Restart Datetime
2021-11-09 11:23:00
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Flow Monitored Via Scada. Upstream System Supported Additional Supply. No Action Required.
Downstream Action Taken
Valve Closure
Downstream Vlv Close Datetime
2021-11-07 13:49:00
Num Pub Evacuated
0
Incident Identified Datetime
2021-11-07 13:49:00
On Site Datetime
2021-11-06 07:46:00
On Off Shore
Onshore
Onshore State Abbreviation
Ny
Onshore Postal Code
10021
Onshore City Name
New York City
Onshore County Name
New York
Designated Location
Not Applicable
Pipe Fac Name
Transco Central Manhattan
Segment Name
M-3
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
135
Other Underground Facilities
Yes
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
30
Puddle Weld Ind
No
Pipe Wall Thickness
0.5
Pipe Smys
35000
Pipe Specification
Unknown
Pipe Seam Type
Other
Pipe Seam Details
Electro Fusion Welded
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
Unknown
Installation Year
1959
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
5/8" Hole In Main
Class Location Type
Class 4 Location
Could Be Hca
Yes
Determination Method
Method1
Not Flammable Ind
Not Flammable
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
4250
Est Cost Intentional Release
0
Est Cost Prop Damage
91885
Est Cost Emergency
800
Est Cost Other
95297
Est Cost Other Details
Support Staff
Gas Cost In Mcf
5
Prpty
192232
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
15
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
300
Gas Flow In Pipe In Mcf
9000
Mop Psig
350
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1959-01-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
Yes
Gas Odorized Ind
Yes
Downstream Valve Type Ind
Manual
Length Segment Isolated
3585
Internal Inspection Ind
No
Unsuitable Mainline Ind
Yes
Tight Mitered Ind
Yes
Other Restrictions Ind
Yes
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
Pipe Bend Restrictions
Pipeline Function
Transmission Line Of Distribution System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Notification From Emergency Responder
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Outside Force Damage
Cause Details
Other Outside Force Damage
Outside Force Type
Other Outside Force Damage
Osf Other Details
The Suspected Cause Was A A High-Pressure Steam Leak Blowing Directly On The Gas Transmission Main
Osf Other Underground Ind
Yes
Preparer Name
O**** L***
Preparer Title
Gas Emergency Response Center-Department Manager
Preparer Email
L****@c****.com
Preparer Telephone
718-319-2350
Local Contact Name
O**** L***
Local Contact Email
L****@c****.com
Local Contact Telephone
718-319-2350
Authorizer Name
O**** L***
Authorizer Title
Gas Emergency Response Center-Department Manager
Authorizer Telephone
718-319-2350
Authorizer Email
L****@c****.com
Narrative
On 11/6/21 at 07:26, con edison's gas emergency response center (gerc) received a report from its customer ops. Call center of a gas odor inside and outside of a residential building located at 733 park ave. The gas odor had been reported to the call center by an occupant of the same building. The area is supplied by a 6-inch low-pressure cast iron gas main (installed in 1897) and a 30-inch steel gas transmission main (installed in 1959), as well as underground electric facilities. Con edison gas distribution services (gds) responded to the location, investigated, and reported a type 1 gas leak, with a natural gas reading of 0.4% detected in the gas point-of-entry (poe) at 733 park avenue. Additionally, gds detected natural gas readings of 15% in two nearby electric subsurface structures (sss's) manhole #m41786 and service box #12935; the covers of those two sss's were remove by gds for venting. The gerc then initiated a code murre, notified the fdny, and dispatched additional con edison gds supervision to the location. Upon further investigation, gds detected natural gas readings of 0.3% in the atmosphere of two building basements at 106 & 110 e. 71st street. Gds sealed the electric poe's to those buildings and vented the readings in the two basements to 0% with assistance from the fdny. Gds reported that all other buildings and adjacent sss's were clear of gas readings, and that electric mh #m41786 and sb #12935 had been vented to 0%. Con edison emergency gas construction personnel were dispatched to the location to pinpoint the source of the leak. On 11/7/21 at 00:50, emergency gas construction reported finding a potential leak on the 30-inch transmission main after detecting natural gas readings of ~100% in the vicinity of the main. All adjacent sss's, buildings, and protection test points were checked and found to be clear of gas readings. The transmission main was operating at ~300 psig. No outages or negative gas system impact were reported. Gas transmission engineering and gas control were notified of the potential transmission main leak. Contingency case 6-c was established and put into effect, and gas operations personnel were assigned to staff multiple main valves as part of the contingency. Gas operations crews remained on location and monitored the condition throughout the night. On 11/7/21 at 13:49, two transmission main valves were closed to isolate a segment of the 30-inch transmission main due to the leak condition, which appeared to progressively worsen. The isolation of the transmission main interrupted service to fifteen (15) gas services and nine hundred thirty-two (932) customers. Con edison gas control issued a limit work order and a condition yellow system status. Construction activities began and the coating on the transmission main was safely removed. Once fully exposed, a leak was found on the transmission main at the 1 o'clock position. A nitrogen barrier was installed, and a high hat (a permanent steel cap) was welded over the leak that was found on the body of the transmission main. A pressure test was conducted, and the test passed. Transmission pressure was reintroduced to the main up to full operating pressure (327 psig) at 50 psig increments with leak surveys conducted over the affected area at every incremental pressure increase, without any further leaks detected. The repair procedure was successfully completed, and service was safely restored on 11/9/21 at 18:09. The suspected cause of the natural gas leak was a high-pressure steam leak that was blowing directly on the gas transmission main. There were no reported injuries or evacuations associated with this incident. Notifications were made to psc, dep and PHMSA.
| Report Received Date | 2021-12-07 00:00:00 |
|---|---|
| Iyear | 2021 |
| Report Number | 20210113 |
| Supplemental Number | 36246 |
| Report Type | Supplemental Final |
| Operator Id | 2704 PHMSA Enforcement |
| Name | Consolidated Edison Co Of New York |
| Operator Street Address | 4 Irving Place |
| Operator City Name | New York |
| Operator State Abbreviation | NY |
| Operator Postal Code | 10003 |
| Local Datetime | 2021-11-07 13:49:00 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 40.7703867 Google Maps OpenStreetMap |
| Location Longitude | -73.9642324 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1321382 NRC Report How to search |
| Nrc Rpt Datetime | 2021-11-07 14:10:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 850 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2021-11-07 13:49:00 |
| Restart Datetime | 2021-11-09 11:23:00 |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Flow Monitored Via Scada. Upstream System Supported Additional Supply. No Action Required. |
| Downstream Action Taken | Valve Closure |
| Downstream Vlv Close Datetime | 2021-11-07 13:49:00 |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2021-11-07 13:49:00 |
| On Site Datetime | 2021-11-06 07:46:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ny |
| Onshore Postal Code | 10021 |
| Onshore City Name | New York City |
| Onshore County Name | New York |
| Designated Location | Not Applicable |
| Pipe Fac Name | Transco Central Manhattan |
| Segment Name | M-3 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 135 |
| Other Underground Facilities | Yes |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 30 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.5 |
| Pipe Smys | 35000 |
| Pipe Specification | Unknown |
| Pipe Seam Type | Other |
| Pipe Seam Details | Electro Fusion Welded |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Unknown |
| Installation Year | 1959 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | 5/8" Hole In Main |
| Class Location Type | Class 4 Location |
| Could Be Hca | Yes |
| Determination Method | Method1 |
| Not Flammable Ind | Not Flammable |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 4250 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 91885 |
| Est Cost Emergency | 800 |
| Est Cost Other | 95297 |
| Est Cost Other Details | Support Staff |
| Gas Cost In Mcf | 5 |
| Prpty | 192232 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 15 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 300 |
| Gas Flow In Pipe In Mcf | 9000 |
| Mop Psig | 350 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1959-01-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | Yes |
| Gas Odorized Ind | Yes |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 3585 |
| Internal Inspection Ind | No |
| Unsuitable Mainline Ind | Yes |
| Tight Mitered Ind | Yes |
| Other Restrictions Ind | Yes |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | Pipe Bend Restrictions |
| Pipeline Function | Transmission Line Of Distribution System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Notification From Emergency Responder |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Outside Force Damage |
| Cause Details | Other Outside Force Damage |
| Outside Force Type | Other Outside Force Damage |
| Osf Other Details | The Suspected Cause Was A A High-Pressure Steam Leak Blowing Directly On The Gas Transmission Main |
| Osf Other Underground Ind | Yes |
| Preparer Name | O**** L*** |
| Preparer Title | Gas Emergency Response Center-Department Manager |
| Preparer Email | L****@c****.com |
| Preparer Telephone | 718-319-2350 |
| Local Contact Name | O**** L*** |
| Local Contact Email | L****@c****.com |
| Local Contact Telephone | 718-319-2350 |
| Authorizer Name | O**** L*** |
| Authorizer Title | Gas Emergency Response Center-Department Manager |
| Authorizer Telephone | 718-319-2350 |
| Authorizer Email | L****@c****.com |
| Narrative | On 11/6/21 at 07:26, con edison's gas emergency response center (gerc) received a report from its customer ops. Call center of a gas odor inside and outside of a residential building located at 733 park ave. The gas odor had been reported to the call center by an occupant of the same building. The area is supplied by a 6-inch low-pressure cast iron gas main (installed in 1897) and a 30-inch steel gas transmission main (installed in 1959), as well as underground electric facilities. Con edison gas distribution services (gds) responded to the location, investigated, and reported a type 1 gas leak, with a natural gas reading of 0.4% detected in the gas point-of-entry (poe) at 733 park avenue. Additionally, gds detected natural gas readings of 15% in two nearby electric subsurface structures (sss's) manhole #m41786 and service box #12935; the covers of those two sss's were remove by gds for venting. The gerc then initiated a code murre, notified the fdny, and dispatched additional con edison gds supervision to the location. Upon further investigation, gds detected natural gas readings of 0.3% in the atmosphere of two building basements at 106 & 110 e. 71st street. Gds sealed the electric poe's to those buildings and vented the readings in the two basements to 0% with assistance from the fdny. Gds reported that all other buildings and adjacent sss's were clear of gas readings, and that electric mh #m41786 and sb #12935 had been vented to 0%. Con edison emergency gas construction personnel were dispatched to the location to pinpoint the source of the leak. On 11/7/21 at 00:50, emergency gas construction reported finding a potential leak on the 30-inch transmission main after detecting natural gas readings of ~100% in the vicinity of the main. All adjacent sss's, buildings, and protection test points were checked and found to be clear of gas readings. The transmission main was operating at ~300 psig. No outages or negative gas system impact were reported. Gas transmission engineering and gas control were notified of the potential transmission main leak. Contingency case 6-c was established and put into effect, and gas operations personnel were assigned to staff multiple main valves as part of the contingency. Gas operations crews remained on location and monitored the condition throughout the night. On 11/7/21 at 13:49, two transmission main valves were closed to isolate a segment of the 30-inch transmission main due to the leak condition, which appeared to progressively worsen. The isolation of the transmission main interrupted service to fifteen (15) gas services and nine hundred thirty-two (932) customers. Con edison gas control issued a limit work order and a condition yellow system status. Construction activities began and the coating on the transmission main was safely removed. Once fully exposed, a leak was found on the transmission main at the 1 o'clock position. A nitrogen barrier was installed, and a high hat (a permanent steel cap) was welded over the leak that was found on the body of the transmission main. A pressure test was conducted, and the test passed. Transmission pressure was reintroduced to the main up to full operating pressure (327 psig) at 50 psig increments with leak surveys conducted over the affected area at every incremental pressure increase, without any further leaks detected. The repair procedure was successfully completed, and service was safely restored on 11/9/21 at 18:09. The suspected cause of the natural gas leak was a high-pressure steam leak that was blowing directly on the gas transmission main. There were no reported injuries or evacuations associated with this incident. Notifications were made to psc, dep and PHMSA. |
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