Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2011-05-25 — CA
Operator
Pacific Gas & Electric Co
Cause
Incorrect Operation
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2011-05-25 12:42
Report number
Location
CA
Narrative
On may 25, 2011 at 1242 hours, pg&e determined that the odorant level in transmission line 300b exceeded limits at topock compressor station. Because of concern of odor complaints from customers smelling the odorant at appliances throughout the southern pg&e territory, the decision was made to vent >3 mmcf of gas to atmosphere at several locations on line 300b and south of ridgecrest on line 311. Venting occurred on two occasions: 1) at 1840 hours on 5/26/11 and completed at 0545 hours on 5/27/11 and 2) at 1453 hours on tuesday may 31 and was completed later the same day at approximately 2200 hours. Gas service representatives were standing by during the venting, purging and re-pressurization activities; however no customer calls where received. The estimated amount of gas vented is 465 mmcf. There were no injuries or fatalities. There were no major media or public agencies present. This incident is reportable due to damages exceeding $50,000. On september 11, 2014, pg&e determined that the volume of gas intentionally release should be corrected to 465 mmcf and the cost of gas intentionally released should be corrected to $2,000,000. Please note that part a, question 11, "estimated volume of intentional and controlled release/blowdown" should be 465,000 mcf.
Detailed record list
Report Received Date
2011-06-24 00:00:00
Iyear
2011
Report Number
20110203
Supplemental Number
16975
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 12:42:00
Location Latitude
34.7145963
Location Longitude
-114.493331
Nrc Rpt Num
977515
Nrc Rpt Datetime
2011-05-26 14:10:00
Commodity Released Type
Natural Gas
Unintentional Release
0
Intentional Release
465
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2011-05-25 14:00:00
Restart Datetime
2011-05-31 22:00:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2011-05-25 12:42:00
On Site Datetime
2011-05-25 12:42:00
On Off Shore
Onshore
Onshore State Abbreviation
Ca
Onshore Postal Code
92363
Onshore City Name
Needles
Onshore County Name
San Bernardino
Designated Location
Milepost
Designated Name
L-300b
Pipe Fac Name
Topock Compressor Station
Segment Name
Odorizer
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Other
Item Involved Details
Odorizer
Installation Year
1957
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Over-Odorized Gas
Class Location Type
Class 1 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
603
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
2000000
Est Cost Prop Damage
0
Est Cost Emergency
1400000
Est Cost Other
0
Prpty
3400000
Accident Psig
493
Mop Psig
660
Mop Cfr Section
192.619(A)(1)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
Yes
Exceed Restriction Ind
No
Phmsa Restriction Ind
State
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
506880
Internal Inspection Ind
No
Unsuitable Mainline Ind
Yes
Other Restrictions Ind
Yes
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
This incident was not pressure related, it was an over-odorization incident.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Other Incorrect Operation
Operation Type
Other Incorrect Operation
Operation Details
Personnel Monitoring The Odorizer Were Not Informed Of The Shut Down Of A Line; Thus They Did Not Shut Off The Odorizer Resulting In Ordorant Pooling In A Pipe With No Flow.
Related Inadequate Proc Ind
Yes
Category Type
Normal Operating Conditions
Operator Qualification Ind
No
Preparer Name
S****** R****
Preparer Title
Compliance Engineer
Preparer Email
S***@p**.com
Preparer Telephone
9253286107
Authorizer Name
L******* D*******
Authorizer Title
Manager Regulatory Compliance
Authorizer Telephone
9253285756
Authorizer Email
L***@p**.com
Narrative
On may 25, 2011 at 1242 hours, pg&e determined that the odorant level in transmission line 300b exceeded limits at topock compressor station. Because of concern of odor complaints from customers smelling the odorant at appliances throughout the southern pg&e territory, the decision was made to vent >3 mmcf of gas to atmosphere at several locations on line 300b and south of ridgecrest on line 311. Venting occurred on two occasions: 1) at 1840 hours on 5/26/11 and completed at 0545 hours on 5/27/11 and 2) at 1453 hours on tuesday may 31 and was completed later the same day at approximately 2200 hours. Gas service representatives were standing by during the venting, purging and re-pressurization activities; however no customer calls where received. The estimated amount of gas vented is 465 mmcf. There were no injuries or fatalities. There were no major media or public agencies present. This incident is reportable due to damages exceeding $50,000. On september 11, 2014, pg&e determined that the volume of gas intentionally release should be corrected to 465 mmcf and the cost of gas intentionally released should be corrected to $2,000,000. Please note that part a, question 11, "estimated volume of intentional and controlled release/blowdown" should be 465,000 mcf.
| Report Received Date | 2011-06-24 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110203 |
| Supplemental Number | 16975 |
| 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 12:42:00 |
| Location Latitude | 34.7145963 Google Maps OpenStreetMap |
| Location Longitude | -114.493331 Google Maps OpenStreetMap |
| Nrc Rpt Num | 977515 NRC Report How to search |
| Nrc Rpt Datetime | 2011-05-26 14:10:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 0 |
| Intentional Release | 465 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2011-05-25 14:00:00 |
| Restart Datetime | 2011-05-31 22:00:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2011-05-25 12:42:00 |
| On Site Datetime | 2011-05-25 12:42:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 92363 |
| Onshore City Name | Needles |
| Onshore County Name | San Bernardino |
| Designated Location | Milepost |
| Designated Name | L-300b |
| Pipe Fac Name | Topock Compressor Station |
| Segment Name | Odorizer |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Other |
| Item Involved Details | Odorizer |
| Installation Year | 1957 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Over-Odorized Gas |
| Class Location Type | Class 1 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 603 |
| 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 | 2000000 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 1400000 |
| Est Cost Other | 0 |
| Prpty | 3400000 |
| Accident Psig | 493 |
| Mop Psig | 660 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | Yes |
| Exceed Restriction Ind | No |
| Phmsa Restriction Ind | State |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 506880 |
| Internal Inspection Ind | No |
| Unsuitable Mainline Ind | Yes |
| Other Restrictions Ind | Yes |
| 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 | This incident was not pressure related, it was an over-odorization incident. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Other Incorrect Operation |
| Operation Type | Other Incorrect Operation |
| Operation Details | Personnel Monitoring The Odorizer Were Not Informed Of The Shut Down Of A Line; Thus They Did Not Shut Off The Odorizer Resulting In Ordorant Pooling In A Pipe With No Flow. |
| Related Inadequate Proc Ind | Yes |
| Category Type | Normal Operating Conditions |
| Operator Qualification Ind | No |
| Preparer Name | S****** R**** |
| Preparer Title | Compliance Engineer |
| Preparer Email | S***@p**.com |
| Preparer Telephone | 9253286107 |
| Authorizer Name | L******* D******* |
| Authorizer Title | Manager Regulatory Compliance |
| Authorizer Telephone | 9253285756 |
| Authorizer Email | L***@p**.com |
| Narrative | On may 25, 2011 at 1242 hours, pg&e determined that the odorant level in transmission line 300b exceeded limits at topock compressor station. Because of concern of odor complaints from customers smelling the odorant at appliances throughout the southern pg&e territory, the decision was made to vent >3 mmcf of gas to atmosphere at several locations on line 300b and south of ridgecrest on line 311. Venting occurred on two occasions: 1) at 1840 hours on 5/26/11 and completed at 0545 hours on 5/27/11 and 2) at 1453 hours on tuesday may 31 and was completed later the same day at approximately 2200 hours. Gas service representatives were standing by during the venting, purging and re-pressurization activities; however no customer calls where received. The estimated amount of gas vented is 465 mmcf. There were no injuries or fatalities. There were no major media or public agencies present. This incident is reportable due to damages exceeding $50,000. On september 11, 2014, pg&e determined that the volume of gas intentionally release should be corrected to 465 mmcf and the cost of gas intentionally released should be corrected to $2,000,000. Please note that part a, question 11, "estimated volume of intentional and controlled release/blowdown" should be 465,000 mcf. |
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