Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2012-12-01 — CA
Operator
Pacific Gas & Electric Co
Cause
Miscellaneous Root Causes
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$465,000
Incident datetime
2012-12-01 08:40
Report number
Location
CA
Narrative
On december 1, 2012 at approximately 0840 hours, pacific gas and electric company (pg&e) was notified of a release of gas at 3331 east miner avenue in the city of stockton on distribution feeder main 1609-01, mile point 1.64. A pg&e representative arrived on scene of the incident at 0905 hours and the flow of gas was stopped at 0956 hours. The release of gas was determined to be the result of a pipeline rupture. The section of ruptured pipeline was removed and transported to a laboratory for further analysis. The remaining pipeline was capped in the field. Out of an abundance of caution, approximately six blocks surrounding the rupture site were evacuated and the fire department shut off gas services to the surrounding area. Seventy-eight customers experienced gas service interruptions. Service was restored on 2100 hours, december 1, 2012, via redundant lines to all customers with the exception of the "can't-get-ins." pg&e crews completed a bypass line at the rupture location at 0826 hours on december 2, 2012, restoring service to the remaining customers who were out of service. This incident was reported to both the DOT and the cpuc because the cost of damages exceeded $50,000, and the volume of unintentionally released gas was greater than 3 mmcf. In addition, sacramento major tv news media channels 3, 10 and 4 were observed on-scene. Pg&e determined that a root cause of the incident was previous damage to the pipe caused by an electric department pole auger during electric pole installations in 1996. Pg&e investigated the other sites along the line where power poles were installed. Four additional pipe locations were identified as having similar damage; these damaged sections were replaced and strength tested to re-establish an maop of 720 psig.
Detailed record list
Report Received Date
2012-12-28 00:00:00
Iyear
2012
Report Number
20120130
Supplemental Number
16076
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
2012-12-01 08:40:00
Location Latitude
37.96522
Location Longitude
-121.24662
Nrc Rpt Num
1032021
Nrc Rpt Datetime
2012-12-01 10:35:00
Commodity Released Type
Natural Gas
Unintentional Release
4700
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2012-12-01 09:56:00
Restart Datetime
2012-12-02 08:26:00
Ignite Ind
No
Explode Ind
No
Incident Identified Datetime
2012-12-01 08:40:00
On Site Datetime
2012-12-01 09:05:00
On Off Shore
Onshore
Onshore State Abbreviation
Ca
Onshore Postal Code
95205-4711
Onshore City Name
Stockton
Onshore County Name
San Joaquin
Designated Location
Milepost
Designated Name
1.64
Pipe Fac Name
Distribution Feeder Main 1609-01
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
54
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
6
Pipe Wall Thickness
0.156
Pipe Smys
42000
Pipe Specification
6.625" Od 0.156" Wt X-42 Erw
Pipe Seam Type
Longitudinal Erw - High Frequency
Pipe Coating Type
Cold Applied Tape
Installation Year
1985
Manufactured Year
1985
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Other
Rupture Details
Longitudinal, Then Rotated To Circumferential
Rupture Length
18
Class Location Type
Class 3 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
111
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
15000
Est Cost Unintentional Release
16000
Est Cost Intentional Release
0
Est Cost Prop Damage
465000
Est Cost Emergency
50000
Est Cost Other
0
Prpty
546000
Accident Psig
412
Mop Psig
720
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
Manual
Length Segment Isolated
6125
Pipeline Function
Transmission Line Of Distribution System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Accident Identifier
Notification From Emergency Responder
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
It was apparent that controller(s) actions or control room issues were not a contributing factor to this incident.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Excavation Damage
Cause Details
Previous Damage Due To Excavation Activity
Ex Party Type
Previous Damage Due To Excavation Activity
Notify Cga Dirt
No
Public Row Ind
Yes
Public Subtype
Other
Pipeline Easement Row Ind
Yes
Power Transmission Row Ind
Yes
Excavator Type
Utility
Excavator Equipment
Auger
Work Performed
Pole
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
Unknown/other
Service Interruption
No
Root Cause Category
Miscellaneous Root Causes
Root Cause Type
Previous Damage
Collected Data Ind
No
Insp Compl Before Damage Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
Yes, But The Point Of The Accident Was Not Identified As A Dig Site
Direct Asmnt Pnt Not Idntf Yr
1985
Non Destructive Exam Ind
No
Preparer Name
C****** C****
Preparer Title
Associate Engineer
Preparer Email
C***@p**.com
Preparer Telephone
925-974-4248
Authorizer Name
F****** Y**
Authorizer Title
Acting Director
Authorizer Telephone
925 974-4207
Authorizer Email
F***@p**.com
Narrative
On december 1, 2012 at approximately 0840 hours, pacific gas and electric company (pg&e) was notified of a release of gas at 3331 east miner avenue in the city of stockton on distribution feeder main 1609-01, mile point 1.64. A pg&e representative arrived on scene of the incident at 0905 hours and the flow of gas was stopped at 0956 hours. The release of gas was determined to be the result of a pipeline rupture. The section of ruptured pipeline was removed and transported to a laboratory for further analysis. The remaining pipeline was capped in the field. Out of an abundance of caution, approximately six blocks surrounding the rupture site were evacuated and the fire department shut off gas services to the surrounding area. Seventy-eight customers experienced gas service interruptions. Service was restored on 2100 hours, december 1, 2012, via redundant lines to all customers with the exception of the "can't-get-ins." pg&e crews completed a bypass line at the rupture location at 0826 hours on december 2, 2012, restoring service to the remaining customers who were out of service. This incident was reported to both the DOT and the cpuc because the cost of damages exceeded $50,000, and the volume of unintentionally released gas was greater than 3 mmcf. In addition, sacramento major tv news media channels 3, 10 and 4 were observed on-scene. Pg&e determined that a root cause of the incident was previous damage to the pipe caused by an electric department pole auger during electric pole installations in 1996. Pg&e investigated the other sites along the line where power poles were installed. Four additional pipe locations were identified as having similar damage; these damaged sections were replaced and strength tested to re-establish an maop of 720 psig.
| Report Received Date | 2012-12-28 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120130 |
| Supplemental Number | 16076 |
| 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 | 2012-12-01 08:40:00 |
| Location Latitude | 37.96522 Google Maps OpenStreetMap |
| Location Longitude | -121.24662 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1032021 NRC Report How to search |
| Nrc Rpt Datetime | 2012-12-01 10:35:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4700 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2012-12-01 09:56:00 |
| Restart Datetime | 2012-12-02 08:26:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Incident Identified Datetime | 2012-12-01 08:40:00 |
| On Site Datetime | 2012-12-01 09:05:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 95205-4711 |
| Onshore City Name | Stockton |
| Onshore County Name | San Joaquin |
| Designated Location | Milepost |
| Designated Name | 1.64 |
| Pipe Fac Name | Distribution Feeder Main 1609-01 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 54 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 6 |
| Pipe Wall Thickness | 0.156 |
| Pipe Smys | 42000 |
| Pipe Specification | 6.625" Od 0.156" Wt X-42 Erw |
| Pipe Seam Type | Longitudinal Erw - High Frequency |
| Pipe Coating Type | Cold Applied Tape |
| Installation Year | 1985 |
| Manufactured Year | 1985 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Other |
| Rupture Details | Longitudinal, Then Rotated To Circumferential |
| Rupture Length | 18 |
| Class Location Type | Class 3 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 111 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 15000 |
| Est Cost Unintentional Release | 16000 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 465000 |
| Est Cost Emergency | 50000 |
| Est Cost Other | 0 |
| Prpty | 546000 |
| Accident Psig | 412 |
| Mop Psig | 720 |
| 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 | Manual |
| Length Segment Isolated | 6125 |
| Pipeline Function | Transmission Line Of Distribution System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Notification From Emergency Responder |
| 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 | It was apparent that controller(s) actions or control room issues were not a contributing factor to this incident. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Excavation Damage |
| Cause Details | Previous Damage Due To Excavation Activity |
| Ex Party Type | Previous Damage Due To Excavation Activity |
| Notify Cga Dirt | No |
| Public Row Ind | Yes |
| Public Subtype | Other |
| Pipeline Easement Row Ind | Yes |
| Power Transmission Row Ind | Yes |
| Excavator Type | Utility |
| Excavator Equipment | Auger |
| Work Performed | Pole |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | Unknown/other |
| Service Interruption | No |
| Root Cause Category | Miscellaneous Root Causes |
| Root Cause Type | Previous Damage |
| Collected Data Ind | No |
| Insp Compl Before Damage Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | Yes, But The Point Of The Accident Was Not Identified As A Dig Site |
| Direct Asmnt Pnt Not Idntf Yr | 1985 |
| Non Destructive Exam Ind | No |
| Preparer Name | C****** C**** |
| Preparer Title | Associate Engineer |
| Preparer Email | C***@p**.com |
| Preparer Telephone | 925-974-4248 |
| Authorizer Name | F****** Y** |
| Authorizer Title | Acting Director |
| Authorizer Telephone | 925 974-4207 |
| Authorizer Email | F***@p**.com |
| Narrative | On december 1, 2012 at approximately 0840 hours, pacific gas and electric company (pg&e) was notified of a release of gas at 3331 east miner avenue in the city of stockton on distribution feeder main 1609-01, mile point 1.64. A pg&e representative arrived on scene of the incident at 0905 hours and the flow of gas was stopped at 0956 hours. The release of gas was determined to be the result of a pipeline rupture. The section of ruptured pipeline was removed and transported to a laboratory for further analysis. The remaining pipeline was capped in the field. Out of an abundance of caution, approximately six blocks surrounding the rupture site were evacuated and the fire department shut off gas services to the surrounding area. Seventy-eight customers experienced gas service interruptions. Service was restored on 2100 hours, december 1, 2012, via redundant lines to all customers with the exception of the "can't-get-ins." pg&e crews completed a bypass line at the rupture location at 0826 hours on december 2, 2012, restoring service to the remaining customers who were out of service. This incident was reported to both the DOT and the cpuc because the cost of damages exceeded $50,000, and the volume of unintentionally released gas was greater than 3 mmcf. In addition, sacramento major tv news media channels 3, 10 and 4 were observed on-scene. Pg&e determined that a root cause of the incident was previous damage to the pipe caused by an electric department pole auger during electric pole installations in 1996. Pg&e investigated the other sites along the line where power poles were installed. Four additional pipe locations were identified as having similar damage; these damaged sections were replaced and strength tested to re-establish an maop of 720 psig. |
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