Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2012-11-10 — CA
Operator
Pacific Gas & Electric Co
Cause
Excavation Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$85,000
Incident datetime
2012-11-10 14:24
Report number
Location
CA
Narrative
At approximately 1424 hours a farmer ripping a field west of modesto struck transmission pipeline l-148 at mile point 10.85, resulting in a release of gas. The excavator did not comply with excavation damage prevention regulations by failing to call USA prior to performing field excavations. Pipeline markers were in place. Pg&e personnel arrived on scene at 1500 hours. The flow of gas was controlled at 1630 hours by reducing the pipeline pressure from 318 psig to 60 psig, and the flow of gas was stopped at 2330 hours by closing an upstream valve and a downstream valve. Pg&e replaced this damaged section of pipe with 8-inch, 0.188-inch wall thickness, x-52, hfw pipe; these permanent repairs were completed at 0730 hours on november 11, 2012. Pg&e was able to maintain service to thirty-five customers with the temporary installation of compressed natural gas. Twenty-five other customers experienced gas service interruptions and all twenty-five services were restored by 1200 hours on november 11, 2012. There were no injuries, no fatalities and no ignition as a result of this incident. This incident was reported to the DOT and cpuc due to cost of damages greater than $50,000 and an unintentional release of gas greater than 3 mmcf.
Detailed record list
Report Received Date
2012-12-11 00:00:00
Iyear
2012
Report Number
20120122
Supplemental Number
15957
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
2012-11-10 14:24:00
Location Latitude
37.59980791
Location Longitude
-121.09396
Nrc Rpt Num
1030266
Nrc Rpt Datetime
2012-11-10 18:49:00
Commodity Released Type
Natural Gas
Unintentional Release
51000
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Incident Identified Datetime
2012-11-10 14:24:00
On Site Datetime
2012-11-10 15:00:00
On Off Shore
Onshore
Onshore State Abbreviation
Ca
Onshore Postal Code
95358
Onshore City Name
Modesto
Onshore County Name
Stanislaus
Designated Location
Milepost
Designated Name
10.85
Pipe Fac Name
148
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
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
8.625
Pipe Wall Thickness
0.277
Pipe Smys
35000
Pipe Specification
Grade B
Pipe Seam Type
Seamless
Pipe Manufacturer
Unknown
Pipe Coating Type
Asphalt
Installation Year
1947
Manufactured Year
1947
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
4
Puncture Circum
2.5
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
112
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
20010
Est Cost Intentional Release
0
Est Cost Prop Damage
85000
Est Cost Emergency
0
Est Cost Other
0
Prpty
105010
Accident Psig
318
Mop Psig
408
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
Pipeline Function
Transmission 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
The damage was not due to pg&e operators, the damage was caused by a third party
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Excavation Damage
Cause Details
Excavation Damage By Third Party
Ex Party Type
Excavation Damage By Third Party
Prior Notification Ind
No
Notify Cga Dirt
No
Pipeline Easement Row Ind
Yes
Excavator Type
Farmer
Excavator Equipment
Farm Equipment
Work Performed
Agriculture
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
Unknown/other
Service Interruption
Yes
Service Interruption Hours
12
Root Cause Category
Excavation Issue
Root Cause Type
Improper Excavation Practice Not Listed Above
Preparer Name
C***** D****
Preparer Title
Gas Engineer
Preparer Email
C***@p**.com
Preparer Telephone
925-322-3311
Preparer Fax
925-974-4232
Authorizer Name
F****** Y**
Authorizer Title
Acting Director
Authorizer Telephone
925-974-4316
Authorizer Email
F***@p**.com
Narrative
At approximately 1424 hours a farmer ripping a field west of modesto struck transmission pipeline l-148 at mile point 10.85, resulting in a release of gas. The excavator did not comply with excavation damage prevention regulations by failing to call USA prior to performing field excavations. Pipeline markers were in place. Pg&e personnel arrived on scene at 1500 hours. The flow of gas was controlled at 1630 hours by reducing the pipeline pressure from 318 psig to 60 psig, and the flow of gas was stopped at 2330 hours by closing an upstream valve and a downstream valve. Pg&e replaced this damaged section of pipe with 8-inch, 0.188-inch wall thickness, x-52, hfw pipe; these permanent repairs were completed at 0730 hours on november 11, 2012. Pg&e was able to maintain service to thirty-five customers with the temporary installation of compressed natural gas. Twenty-five other customers experienced gas service interruptions and all twenty-five services were restored by 1200 hours on november 11, 2012. There were no injuries, no fatalities and no ignition as a result of this incident. This incident was reported to the DOT and cpuc due to cost of damages greater than $50,000 and an unintentional release of gas greater than 3 mmcf.
| Report Received Date | 2012-12-11 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120122 |
| Supplemental Number | 15957 |
| 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 | 2012-11-10 14:24:00 |
| Location Latitude | 37.59980791 Google Maps OpenStreetMap |
| Location Longitude | -121.09396 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1030266 NRC Report How to search |
| Nrc Rpt Datetime | 2012-11-10 18:49:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 51000 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Incident Identified Datetime | 2012-11-10 14:24:00 |
| On Site Datetime | 2012-11-10 15:00:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 95358 |
| Onshore City Name | Modesto |
| Onshore County Name | Stanislaus |
| Designated Location | Milepost |
| Designated Name | 10.85 |
| Pipe Fac Name | 148 |
| 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 | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 8.625 |
| Pipe Wall Thickness | 0.277 |
| Pipe Smys | 35000 |
| Pipe Specification | Grade B |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Asphalt |
| Installation Year | 1947 |
| Manufactured Year | 1947 |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Puncture Axial | 4 |
| Puncture Circum | 2.5 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 112 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 20010 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 85000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 105010 |
| Accident Psig | 318 |
| Mop Psig | 408 |
| 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 |
| Pipeline Function | Transmission 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 | The damage was not due to pg&e operators, the damage was caused by a third party |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Excavation Damage |
| Cause Details | Excavation Damage By Third Party |
| Ex Party Type | Excavation Damage By Third Party |
| Prior Notification Ind | No |
| Notify Cga Dirt | No |
| Pipeline Easement Row Ind | Yes |
| Excavator Type | Farmer |
| Excavator Equipment | Farm Equipment |
| Work Performed | Agriculture |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | Unknown/other |
| Service Interruption | Yes |
| Service Interruption Hours | 12 |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Improper Excavation Practice Not Listed Above |
| Preparer Name | C***** D**** |
| Preparer Title | Gas Engineer |
| Preparer Email | C***@p**.com |
| Preparer Telephone | 925-322-3311 |
| Preparer Fax | 925-974-4232 |
| Authorizer Name | F****** Y** |
| Authorizer Title | Acting Director |
| Authorizer Telephone | 925-974-4316 |
| Authorizer Email | F***@p**.com |
| Narrative | At approximately 1424 hours a farmer ripping a field west of modesto struck transmission pipeline l-148 at mile point 10.85, resulting in a release of gas. The excavator did not comply with excavation damage prevention regulations by failing to call USA prior to performing field excavations. Pipeline markers were in place. Pg&e personnel arrived on scene at 1500 hours. The flow of gas was controlled at 1630 hours by reducing the pipeline pressure from 318 psig to 60 psig, and the flow of gas was stopped at 2330 hours by closing an upstream valve and a downstream valve. Pg&e replaced this damaged section of pipe with 8-inch, 0.188-inch wall thickness, x-52, hfw pipe; these permanent repairs were completed at 0730 hours on november 11, 2012. Pg&e was able to maintain service to thirty-five customers with the temporary installation of compressed natural gas. Twenty-five other customers experienced gas service interruptions and all twenty-five services were restored by 1200 hours on november 11, 2012. There were no injuries, no fatalities and no ignition as a result of this incident. This incident was reported to the DOT and cpuc due to cost of damages greater than $50,000 and an unintentional release of gas greater than 3 mmcf. |
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