Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2014-12-29 — CA
Operator
Pacific Gas & Electric Co
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$325,000
Incident datetime
2014-12-29 15:00
Report number
Location
CA, ALAMEDA
Narrative
On december 29, 2014, pg&e crews were performing routine maintenance on transmission line l-105n, when a leak was observed on a nearby 6-inch blow off valve. The 6-inch blow off valve is located near 51st avenue and san leandro street in oakland in a valve frame and cover with limited access. Pg&e crews excavated the valve to determine the nature of the leak and the method of repair. On december 30, 2014 it was estimated that the cost of repairs, including the use of compressed natural gas (cng), exceeded $50,000, requiring a report to the DOT and cpuc. There were no injuries, no fatalities, no ignition, no evacuations and no media associated with this event. On december 30 at approximately 1400 hours, pg&e placed eight industrial customers on cng. No customers lost gas service as a result of the event. Pg&e de-pressurized a one mile section of l-105n at 1815 hours. Repairs to the blow off valve were completed by 0200 hours on december 31, and at 0430 hours pressure was restored to the isolated section of l-105n. The cause of the leak was due to atmospheric corrosion of the flange bolts allowing gas to escape through the gasket joint.
Detailed record list
Occurred At
2014-12-29 15:00:00
Year
2014
Report Received Date
2015-01-28 00:00:00
Iyear
2014.0
Report Number
20150006.0
Supplemental Number
16217.0
Report Type
Supplemental Final
Operator Id
15007
Name
Pacific Gas & Electric Co
Operator Street Address
6121 Bollinger Canyon Rd.
Operator City Name
San Ramon
Operator State Abbreviation
CA
Operator Postal Code
94583
Local Datetime
2014-12-29 15:00:00
Location Street Address
51st. Ave. & San Leandro St.
Location City Name
Oakland
Location County Name
Alameda
Location State Abbreviation
CA
Location Postal Code
94601
Location Latitude
37.76591
Location Longitude
-122.21141
Nrc Rpt Datetime
2014-12-30 00:00:00
Nrc Rpt Num
1104593
Commodity Released Type
Natural Gas
Unintentional Release
365.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2014-12-29 15:00:00
On Site Datetime
2014-12-29 15:00:00
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
In Underground Enclosed Space (E.g. Vault)
Depth Of Cover
66.0
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Other
System Part Details
Blow Off Valve
Installation Year
1989.0
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown
Release Type
Other
Leak Type Other
Leaking Blow Off Valve
Release Type Details
Leaking Blow Off Valve
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
325000.0
Est Cost Emergency
0.0
Est Cost Other
0.0
Est Cost Unintentional Release
1500.0
Prpty
326500.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
0.0
Accident Psig
135.0
Normal Psig
135.0
Mop Psig
198.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
General Corrosion
Atmosphere Corrosion Ind
Yes
Field Exam Basis Ind
Yes
Underground Location
No
Externally Coated
Yes
Prior Damage
Yes
Coating Type
Paint
Preparer Name
S****** R****
Preparer Title
Compliance Engineer
Preparer Email
S***@p**.com
Preparer Telephone
925-328-6107
Authorizer Name
L**** D*******
Authorizer Title
Manager Of Gas Regulatory Compliance
Authorizer Telephone
925-328-5756
Authorizer Email
L***@p**.com
Narrative
On december 29, 2014, pg&e crews were performing routine maintenance on transmission line l-105n, when a leak was observed on a nearby 6-inch blow off valve. The 6-inch blow off valve is located near 51st avenue and san leandro street in oakland in a valve frame and cover with limited access. Pg&e crews excavated the valve to determine the nature of the leak and the method of repair. On december 30, 2014 it was estimated that the cost of repairs, including the use of compressed natural gas (cng), exceeded $50,000, requiring a report to the DOT and cpuc. There were no injuries, no fatalities, no ignition, no evacuations and no media associated with this event. On december 30 at approximately 1400 hours, pg&e placed eight industrial customers on cng. No customers lost gas service as a result of the event. Pg&e de-pressurized a one mile section of l-105n at 1815 hours. Repairs to the blow off valve were completed by 0200 hours on december 31, and at 0430 hours pressure was restored to the isolated section of l-105n. The cause of the leak was due to atmospheric corrosion of the flange bolts allowing gas to escape through the gasket joint.
| Occurred At | 2014-12-29 15:00:00 |
|---|---|
| Year | 2014 |
| Report Received Date | 2015-01-28 00:00:00 |
| Iyear | 2014.0 |
| Report Number | 20150006.0 |
| Supplemental Number | 16217.0 |
| Report Type | Supplemental Final |
| Operator Id | 15007 PHMSA Enforcement |
| Name | Pacific Gas & Electric Co |
| Operator Street Address | 6121 Bollinger Canyon Rd. |
| Operator City Name | San Ramon |
| Operator State Abbreviation | CA |
| Operator Postal Code | 94583 |
| Local Datetime | 2014-12-29 15:00:00 |
| Location Street Address | 51st. Ave. & San Leandro St. |
| Location City Name | Oakland |
| Location County Name | Alameda |
| Location State Abbreviation | CA |
| Location Postal Code | 94601 |
| Location Latitude | 37.76591 Google Maps OpenStreetMap |
| Location Longitude | -122.21141 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2014-12-30 00:00:00 |
| Nrc Rpt Num | 1104593 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 365.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2014-12-29 15:00:00 |
| On Site Datetime | 2014-12-29 15:00:00 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | In Underground Enclosed Space (E.g. Vault) |
| Depth Of Cover | 66.0 |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Other |
| System Part Details | Blow Off Valve |
| Installation Year | 1989.0 |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown |
| Release Type | Other |
| Leak Type Other | Leaking Blow Off Valve |
| Release Type Details | Leaking Blow Off Valve |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 325000.0 |
| Est Cost Emergency | 0.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 1500.0 |
| Prpty | 326500.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Accident Psig | 135.0 |
| Normal Psig | 135.0 |
| Mop Psig | 198.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| 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 | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | General Corrosion |
| Atmosphere Corrosion Ind | Yes |
| Field Exam Basis Ind | Yes |
| Underground Location | No |
| Externally Coated | Yes |
| Prior Damage | Yes |
| Coating Type | Paint |
| Preparer Name | S****** R**** |
| Preparer Title | Compliance Engineer |
| Preparer Email | S***@p**.com |
| Preparer Telephone | 925-328-6107 |
| Authorizer Name | L**** D******* |
| Authorizer Title | Manager Of Gas Regulatory Compliance |
| Authorizer Telephone | 925-328-5756 |
| Authorizer Email | L***@p**.com |
| Narrative | On december 29, 2014, pg&e crews were performing routine maintenance on transmission line l-105n, when a leak was observed on a nearby 6-inch blow off valve. The 6-inch blow off valve is located near 51st avenue and san leandro street in oakland in a valve frame and cover with limited access. Pg&e crews excavated the valve to determine the nature of the leak and the method of repair. On december 30, 2014 it was estimated that the cost of repairs, including the use of compressed natural gas (cng), exceeded $50,000, requiring a report to the DOT and cpuc. There were no injuries, no fatalities, no ignition, no evacuations and no media associated with this event. On december 30 at approximately 1400 hours, pg&e placed eight industrial customers on cng. No customers lost gas service as a result of the event. Pg&e de-pressurized a one mile section of l-105n at 1815 hours. Repairs to the blow off valve were completed by 0200 hours on december 31, and at 0430 hours pressure was restored to the isolated section of l-105n. The cause of the leak was due to atmospheric corrosion of the flange bolts allowing gas to escape through the gasket joint. |
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