Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2011-05-25 — CA
Operator
Pacific Gas & Electric Co
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$30,000
Incident datetime
2011-05-25 17:45
Report number
Location
CA
Narrative
During a scheduled hydrotest job, the valve stem on an inlet fire valve to a regulator station at 2445 garcia avenue in mountain view broke at 1745 hours. The valve was being operated to release water from the line. The valve was broken in the partially open position causing gas to escape. In order to isolate the broken valve to make repairs, approximately 7000 feet of line 132a (rengstorff station [mountain view golf course] to the sierra vista regulator station [at rock and sierra vista avenue]) was blown down starting at 1950 hours. Gas flow stopped at approximately 2020 hours. The delay between the breaking of the valve stem and the start of the blow down was the time required to develop the plan for the situation and to obtain the required clearances. The estimated volume of the gas released to atmosphere was 3,000 mcf which caused the need to report this incident. No service has been lost.
Detailed record list
Report Received Date
2011-06-20 00:00:00
Iyear
2011
Report Number
20110186
Supplemental Number
15990
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
2011-05-25 17:45:00
Location Latitude
37.425407
Location Longitude
-122.09328
Nrc Rpt Num
977449
Nrc Rpt Datetime
2011-05-25 22:30:00
Commodity Released Type
Natural Gas
Unintentional Release
0
Intentional Release
3000
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2011-05-25 19:50:00
Restart Datetime
2011-05-27 17:00:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2011-05-25 17:45:00
On Site Datetime
2011-05-25 17:45:00
On Off Shore
Onshore
Onshore State Abbreviation
Ca
Onshore Postal Code
94035
Onshore City Name
Mountain View
Onshore County Name
Santa Clara
Designated Location
Milepost
Designated Name
Fire Valve
Pipe Fac Name
L-132a
Segment Name
Charleston & Garcia Reg Station Valve #49-C3d
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Belowground Storage, Including Associated Equipment And Piping
Item Involved
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
1980
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Valve Stem Broke During Operation Of Valve.
Class Location Type
Class 3 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
62
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
0
Est Cost Intentional Release
10000
Est Cost Prop Damage
30000
Est Cost Emergency
0
Est Cost Other
0
Prpty
40000
Accident Psig
285
Mop Psig
400
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
Yes
Exceed Restriction Ind
No
Phmsa Restriction Ind
State
Pipeline Function
Transmission System
Scada In Place Ind
No
Accident Identifier
Other
Accident Details
Operator Was On Scene At Time Of Incident
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
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Relief Valve Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
A Portion Of The Rubber Gasket Surrounding The Valve Gate Had Become Dislodged W
Preparer Name
L******* D*******
Preparer Title
Interim Manager
Preparer Email
L***@p**.com
Preparer Telephone
9259744313
Authorizer Name
F****** Y**
Authorizer Title
Acting Director
Authorizer Telephone
9259744316
Authorizer Email
F***@p**.com
Narrative
During a scheduled hydrotest job, the valve stem on an inlet fire valve to a regulator station at 2445 garcia avenue in mountain view broke at 1745 hours. The valve was being operated to release water from the line. The valve was broken in the partially open position causing gas to escape. In order to isolate the broken valve to make repairs, approximately 7000 feet of line 132a (rengstorff station [mountain view golf course] to the sierra vista regulator station [at rock and sierra vista avenue]) was blown down starting at 1950 hours. Gas flow stopped at approximately 2020 hours. The delay between the breaking of the valve stem and the start of the blow down was the time required to develop the plan for the situation and to obtain the required clearances. The estimated volume of the gas released to atmosphere was 3,000 mcf which caused the need to report this incident. No service has been lost.
| Report Received Date | 2011-06-20 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110186 |
| Supplemental Number | 15990 |
| 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 | 2011-05-25 17:45:00 |
| Location Latitude | 37.425407 Google Maps OpenStreetMap |
| Location Longitude | -122.09328 Google Maps OpenStreetMap |
| Nrc Rpt Num | 977449 NRC Report How to search |
| Nrc Rpt Datetime | 2011-05-25 22:30:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 0 |
| Intentional Release | 3000 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2011-05-25 19:50:00 |
| Restart Datetime | 2011-05-27 17:00:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2011-05-25 17:45:00 |
| On Site Datetime | 2011-05-25 17:45:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 94035 |
| Onshore City Name | Mountain View |
| Onshore County Name | Santa Clara |
| Designated Location | Milepost |
| Designated Name | Fire Valve |
| Pipe Fac Name | L-132a |
| Segment Name | Charleston & Garcia Reg Station Valve #49-C3d |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Belowground Storage, Including Associated Equipment And Piping |
| Item Involved | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | 1980 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Valve Stem Broke During Operation Of Valve. |
| Class Location Type | Class 3 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 62 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 0 |
| Est Cost Intentional Release | 10000 |
| Est Cost Prop Damage | 30000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 40000 |
| Accident Psig | 285 |
| Mop Psig | 400 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | Yes |
| Exceed Restriction Ind | No |
| Phmsa Restriction Ind | State |
| Pipeline Function | Transmission System |
| Scada In Place Ind | No |
| Accident Identifier | Other |
| Accident Details | Operator Was On Scene At Time Of Incident |
| 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 | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Relief Valve Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | A Portion Of The Rubber Gasket Surrounding The Valve Gate Had Become Dislodged W |
| Preparer Name | L******* D******* |
| Preparer Title | Interim Manager |
| Preparer Email | L***@p**.com |
| Preparer Telephone | 9259744313 |
| Authorizer Name | F****** Y** |
| Authorizer Title | Acting Director |
| Authorizer Telephone | 9259744316 |
| Authorizer Email | F***@p**.com |
| Narrative | During a scheduled hydrotest job, the valve stem on an inlet fire valve to a regulator station at 2445 garcia avenue in mountain view broke at 1745 hours. The valve was being operated to release water from the line. The valve was broken in the partially open position causing gas to escape. In order to isolate the broken valve to make repairs, approximately 7000 feet of line 132a (rengstorff station [mountain view golf course] to the sierra vista regulator station [at rock and sierra vista avenue]) was blown down starting at 1950 hours. Gas flow stopped at approximately 2020 hours. The delay between the breaking of the valve stem and the start of the blow down was the time required to develop the plan for the situation and to obtain the required clearances. The estimated volume of the gas released to atmosphere was 3,000 mcf which caused the need to report this incident. No service has been lost. |
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