Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2011-12-14 — NY
Operator
Consolidated Edison Co Of New York
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$33,369
Incident datetime
2011-12-14 09:02
Report number
Location
NY
Narrative
On december 14, 2011 a con edison public improvement inspection supervisor on location for an unrelated sewer project was approached by a customer from 1710 victor st., bronx, n.Y. Reporting a gas odor outside. The gas emergency response center (gerc) was contacted and gas distribution services (gds) was dispatched. Upon investigating, gds reported a 20% gas-in-air reading 32' west of the building along the curbline and 60% gas-in-air reading in a street patch in close proximity. The leak was classified a type 1 due to a 24" 1948 245 psi transmission main on the street approximately 2' away from a 6" low pressure cast iron distribution main. Gas construction responded and performed an investigation. At 18:48 hrs., construction supervision reported to the gerc a probable transmission main leak was suspected over a 24" coupling with a 57% reading over same. An operational plan was initiated and all operating areas, transmission engineering, pressure control, gas control, leak survey, gerc and senior management participated. A plan to isolate the section of transmission and reduce pressure to approximately 60 psi was identified and once reduced, excavation over the suspected leaking coupling would begin. Construction, gds and pressure control crews proceeded with the transmission main isolation and pressure reduction. Operations continued around-the-clock until the 24" transmission main was exposed and a visible leak on a 24" coupling was detected. A welded repair sleeve was installed to secure the leak. A second welded repair sleeve was installed on the coupling north of the leak as a precaution. All welds were x-rayed and approved. On saturday december 17, 2011 at 01:30 hrs. Pressure restoration began and at 05:00 hrs. Normal system conditions resumed. There were no evacuations or injuries. The nys psc, US DOT and nyc dep were notified. This was a serious level incident.
Detailed record list
Report Received Date
2011-12-28 00:00:00
Iyear
2011
Report Number
20110399
Supplemental Number
15422
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
2011-12-14 09:02:00
Location Latitude
40.843847
Location Longitude
-73.866941
Nrc Rpt Num
998195
Nrc Rpt Datetime
2011-12-15 11:34:00
Commodity Released Type
Natural Gas
Unintentional Release
364
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2011-12-15 11:07:00
Restart Datetime
2011-12-17 01:30:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2011-12-14 09:02:00
On Site Datetime
2011-12-14 09:17:00
On Off Shore
Onshore
Onshore State Abbreviation
Ny
Onshore Postal Code
10462-3520
Onshore City Name
New York
Onshore County Name
Bronx
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
68
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Other
Item Involved Details
Compression Coupling
Installation Year
1948
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Seal Or Packing
Class Location Type
Class 4 Location
Could Be Hca
Yes
Determination Method
Method1
Pir Radius
259
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
1095
Est Cost Intentional Release
0
Est Cost Prop Damage
33369
Est Cost Emergency
5749
Est Cost Other
1200
Est Cost Other Details
Materials
Prpty
41413
Accident Psig
221
Mop Psig
245
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Remotely Controlled
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
Drip Pots
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Investigation Status
No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate)
Investigation Status Details
Leak was detected by company employee on location. No control room function is related to leak detection as it applies to this incident.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Threaded Connection/coupling Failure
Eq Failure Type
Threaded Connection/coupling Failure
Other Stripped Ind
Mechanical Coupling
Eq Additional Other Ind
Yes
Eq Additional Other Details
Compression Coupling Leak
Preparer Name
K**** F****
Preparer Title
Operations Manager-Gas Emergency Response Center
Preparer Email
F*****@c****.com
Preparer Telephone
718-319-2310
Preparer Fax
718-904-4607
Authorizer Name
V***** D******
Authorizer Title
Dept. Manager--Gas Emergency Response Center
Authorizer Telephone
718-319-2350
Authorizer Email
D*******@c****.com
Narrative
On december 14, 2011 a con edison public improvement inspection supervisor on location for an unrelated sewer project was approached by a customer from 1710 victor st., bronx, n.Y. Reporting a gas odor outside. The gas emergency response center (gerc) was contacted and gas distribution services (gds) was dispatched. Upon investigating, gds reported a 20% gas-in-air reading 32' west of the building along the curbline and 60% gas-in-air reading in a street patch in close proximity. The leak was classified a type 1 due to a 24" 1948 245 psi transmission main on the street approximately 2' away from a 6" low pressure cast iron distribution main. Gas construction responded and performed an investigation. At 18:48 hrs., construction supervision reported to the gerc a probable transmission main leak was suspected over a 24" coupling with a 57% reading over same. An operational plan was initiated and all operating areas, transmission engineering, pressure control, gas control, leak survey, gerc and senior management participated. A plan to isolate the section of transmission and reduce pressure to approximately 60 psi was identified and once reduced, excavation over the suspected leaking coupling would begin. Construction, gds and pressure control crews proceeded with the transmission main isolation and pressure reduction. Operations continued around-the-clock until the 24" transmission main was exposed and a visible leak on a 24" coupling was detected. A welded repair sleeve was installed to secure the leak. A second welded repair sleeve was installed on the coupling north of the leak as a precaution. All welds were x-rayed and approved. On saturday december 17, 2011 at 01:30 hrs. Pressure restoration began and at 05:00 hrs. Normal system conditions resumed. There were no evacuations or injuries. The nys psc, US DOT and nyc dep were notified. This was a serious level incident.
| Report Received Date | 2011-12-28 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110399 |
| Supplemental Number | 15422 |
| 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 | 2011-12-14 09:02:00 |
| Location Latitude | 40.843847 Google Maps OpenStreetMap |
| Location Longitude | -73.866941 Google Maps OpenStreetMap |
| Nrc Rpt Num | 998195 NRC Report How to search |
| Nrc Rpt Datetime | 2011-12-15 11:34:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 364 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2011-12-15 11:07:00 |
| Restart Datetime | 2011-12-17 01:30:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2011-12-14 09:02:00 |
| On Site Datetime | 2011-12-14 09:17:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ny |
| Onshore Postal Code | 10462-3520 |
| Onshore City Name | New York |
| Onshore County Name | Bronx |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 68 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Other |
| Item Involved Details | Compression Coupling |
| Installation Year | 1948 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Class Location Type | Class 4 Location |
| Could Be Hca | Yes |
| Determination Method | Method1 |
| Pir Radius | 259 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 1095 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 33369 |
| Est Cost Emergency | 5749 |
| Est Cost Other | 1200 |
| Est Cost Other Details | Materials |
| Prpty | 41413 |
| Accident Psig | 221 |
| Mop Psig | 245 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Remotely Controlled |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | Drip Pots |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Investigation Status | No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate) |
| Investigation Status Details | Leak was detected by company employee on location. No control room function is related to leak detection as it applies to this incident. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Threaded Connection/coupling Failure |
| Eq Failure Type | Threaded Connection/coupling Failure |
| Other Stripped Ind | Mechanical Coupling |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Compression Coupling Leak |
| Preparer Name | K**** F**** |
| Preparer Title | Operations Manager-Gas Emergency Response Center |
| Preparer Email | F*****@c****.com |
| Preparer Telephone | 718-319-2310 |
| Preparer Fax | 718-904-4607 |
| Authorizer Name | V***** D****** |
| Authorizer Title | Dept. Manager--Gas Emergency Response Center |
| Authorizer Telephone | 718-319-2350 |
| Authorizer Email | D*******@c****.com |
| Narrative | On december 14, 2011 a con edison public improvement inspection supervisor on location for an unrelated sewer project was approached by a customer from 1710 victor st., bronx, n.Y. Reporting a gas odor outside. The gas emergency response center (gerc) was contacted and gas distribution services (gds) was dispatched. Upon investigating, gds reported a 20% gas-in-air reading 32' west of the building along the curbline and 60% gas-in-air reading in a street patch in close proximity. The leak was classified a type 1 due to a 24" 1948 245 psi transmission main on the street approximately 2' away from a 6" low pressure cast iron distribution main. Gas construction responded and performed an investigation. At 18:48 hrs., construction supervision reported to the gerc a probable transmission main leak was suspected over a 24" coupling with a 57% reading over same. An operational plan was initiated and all operating areas, transmission engineering, pressure control, gas control, leak survey, gerc and senior management participated. A plan to isolate the section of transmission and reduce pressure to approximately 60 psi was identified and once reduced, excavation over the suspected leaking coupling would begin. Construction, gds and pressure control crews proceeded with the transmission main isolation and pressure reduction. Operations continued around-the-clock until the 24" transmission main was exposed and a visible leak on a 24" coupling was detected. A welded repair sleeve was installed to secure the leak. A second welded repair sleeve was installed on the coupling north of the leak as a precaution. All welds were x-rayed and approved. On saturday december 17, 2011 at 01:30 hrs. Pressure restoration began and at 05:00 hrs. Normal system conditions resumed. There were no evacuations or injuries. The nys psc, US DOT and nyc dep were notified. This was a serious level incident. |
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