Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2014-10-15 — CA
Operator
Pacific Gas & Electric Co
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$200,000
Incident datetime
2014-10-15 13:00
Report number
Location
CA
Narrative
On oct. 15, 2014 during a routine leak survey, a non-hazardous leak was discovered at the casing vent on pg&e's transmission line l-132 at mile point 3.07. The 30-inch casing and 24-inch diameter transmission pipe l-132 cross beneath the union pacific rail road near lafayette and gianera streets. In response, pg&e immediately began excavations to assess the pipe condition on october 15, 2014. An emergency excavation notice was sent to the cpuc on october 16 regarding this matter. The casing ends were excavated, the non-hazardous leak has been determined to originate from the bottom of the carrier pipe. The cause of the leak is due to microbiological external corrosion. On october 23, 2014, pressure for l-132 was lowered 20% (from 285 psig to 228 psig) and a safety related condition report was submitted to the DOT and cpuc. This incident was reported to the DOT and cpuc on october 29, 2014 upon determination that response costs are estimated to exceed $50,000. There are no injuries, no fatalities, and no ignition. No media was observed on scene. A liquefied natural gas (lng) installation notification was sent to the cpuc on november 13, 2014 in the event that additional gas supply was required to prevent the loss of customers during repairs. During the shutdown of the transmission line, the feed to this critical regulator station was temporarily supplied with compressed natural gas (cng), as temperatures were mild and the lng support was not required. On november 19, pg&e installed the new 24-inch pipe into the existing 30-inch casing. By november 21 at approximately 2313 hours, pg&e completed tie-in and returned l-132 to normal operating pressure of 285 psig.
Detailed record list
Report Received Date
2014-11-25 00:00:00
Iyear
2014
Report Number
20140129
Supplemental Number
16978
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
2014-10-15 13:00:00
Location Latitude
37.40055
Location Longitude
-121.96572
Nrc Rpt Num
1099669
Nrc Rpt Datetime
2014-10-29 00:00:00
Commodity Released Type
Natural Gas
Unintentional Release
0
Intentional Release
830
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2014-11-14 17:00:00
Restart Datetime
2014-11-21 20:00:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2014-10-15 13:00:00
On Site Datetime
2014-10-15 13:00:00
On Off Shore
Onshore
Onshore State Abbreviation
Ca
Onshore Postal Code
95050
Onshore City Name
Santa Clara
Onshore County Name
Santa Clara
Designated Location
Milepost
Designated Name
3.07
Pipe Fac Name
Line 132
Segment Name
113
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
66
Crossing
Yes
Railroad Crossing Ind
Yes
Railroad Type
Cased
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
24
Pipe Wall Thickness
0.281
Pipe Smys
40000
Pipe Specification
Grade B
Pipe Seam Type
Seamless
Pipe Manufacturer
National Tube Co.
Pipe Coating Type
Asphalt
Installation Year
1944
Manufactured Year
1944
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
To Be Determined
Class Location Type
Class 3 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
322
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
3735
Est Cost Prop Damage
200000
Est Cost Emergency
0
Est Cost Other
0
Prpty
203735
Accident Psig
285
Mop Psig
300
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
Yes
Exceed Restriction Ind
No
Phmsa Restriction Ind
Phmsa
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Remotely Controlled
Length Segment Isolated
15998
Internal Inspection Ind
Yes
Operation Complications Ind
Yes
Low Op Pressure Ind
Yes
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
Leak was detected during routine leak survey.
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
Microbiological Corrosion Ind
Yes
Metallurgical Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Shielding Evident
Yes
Cathodic Survey Type
Yes
Other Cp Survey Ind
Yes
Other Cp Survey Year
2014
Prior Damage
Yes
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
2011
Hydrtst Most Rcnt Pressure
695
Direct Asmnt Conducted
Yes, And An Investigative Dig Was Cunducted At The Point Of The Accident
Direct Asmnt At Pnt Accdnt Yr
2014
Non Destructive Exam Ind
Yes
Exm Radiography Rcnt Year
2014
Exm Dry Mgnt Partcl Rcnt Year
2014
Exm Radiography Rcnt Ind
Yes
Exm Dry Mgnt Partcl Rcnt Ind
Yes
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 oct. 15, 2014 during a routine leak survey, a non-hazardous leak was discovered at the casing vent on pg&e's transmission line l-132 at mile point 3.07. The 30-inch casing and 24-inch diameter transmission pipe l-132 cross beneath the union pacific rail road near lafayette and gianera streets. In response, pg&e immediately began excavations to assess the pipe condition on october 15, 2014. An emergency excavation notice was sent to the cpuc on october 16 regarding this matter. The casing ends were excavated, the non-hazardous leak has been determined to originate from the bottom of the carrier pipe. The cause of the leak is due to microbiological external corrosion. On october 23, 2014, pressure for l-132 was lowered 20% (from 285 psig to 228 psig) and a safety related condition report was submitted to the DOT and cpuc. This incident was reported to the DOT and cpuc on october 29, 2014 upon determination that response costs are estimated to exceed $50,000. There are no injuries, no fatalities, and no ignition. No media was observed on scene. A liquefied natural gas (lng) installation notification was sent to the cpuc on november 13, 2014 in the event that additional gas supply was required to prevent the loss of customers during repairs. During the shutdown of the transmission line, the feed to this critical regulator station was temporarily supplied with compressed natural gas (cng), as temperatures were mild and the lng support was not required. On november 19, pg&e installed the new 24-inch pipe into the existing 30-inch casing. By november 21 at approximately 2313 hours, pg&e completed tie-in and returned l-132 to normal operating pressure of 285 psig.
| Report Received Date | 2014-11-25 00:00:00 |
|---|---|
| Iyear | 2014 |
| Report Number | 20140129 |
| Supplemental Number | 16978 |
| 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 | 2014-10-15 13:00:00 |
| Location Latitude | 37.40055 Google Maps OpenStreetMap |
| Location Longitude | -121.96572 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1099669 NRC Report How to search |
| Nrc Rpt Datetime | 2014-10-29 00:00:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 0 |
| Intentional Release | 830 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2014-11-14 17:00:00 |
| Restart Datetime | 2014-11-21 20:00:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2014-10-15 13:00:00 |
| On Site Datetime | 2014-10-15 13:00:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 95050 |
| Onshore City Name | Santa Clara |
| Onshore County Name | Santa Clara |
| Designated Location | Milepost |
| Designated Name | 3.07 |
| Pipe Fac Name | Line 132 |
| Segment Name | 113 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 66 |
| Crossing | Yes |
| Railroad Crossing Ind | Yes |
| Railroad Type | Cased |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 24 |
| Pipe Wall Thickness | 0.281 |
| Pipe Smys | 40000 |
| Pipe Specification | Grade B |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | National Tube Co. |
| Pipe Coating Type | Asphalt |
| Installation Year | 1944 |
| Manufactured Year | 1944 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | To Be Determined |
| Class Location Type | Class 3 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 322 |
| 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 | 3735 |
| Est Cost Prop Damage | 200000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 203735 |
| Accident Psig | 285 |
| Mop Psig | 300 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | Yes |
| Exceed Restriction Ind | No |
| Phmsa Restriction Ind | Phmsa |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Remotely Controlled |
| Length Segment Isolated | 15998 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | Yes |
| Low Op Pressure Ind | Yes |
| 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 | Leak was detected during routine leak survey. |
| 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 |
| Microbiological Corrosion Ind | Yes |
| Metallurgical Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Shielding Evident | Yes |
| Cathodic Survey Type | Yes |
| Other Cp Survey Ind | Yes |
| Other Cp Survey Year | 2014 |
| Prior Damage | Yes |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 2011 |
| Hydrtst Most Rcnt Pressure | 695 |
| Direct Asmnt Conducted | Yes, And An Investigative Dig Was Cunducted At The Point Of The Accident |
| Direct Asmnt At Pnt Accdnt Yr | 2014 |
| Non Destructive Exam Ind | Yes |
| Exm Radiography Rcnt Year | 2014 |
| Exm Dry Mgnt Partcl Rcnt Year | 2014 |
| Exm Radiography Rcnt Ind | Yes |
| Exm Dry Mgnt Partcl Rcnt Ind | Yes |
| 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 oct. 15, 2014 during a routine leak survey, a non-hazardous leak was discovered at the casing vent on pg&e's transmission line l-132 at mile point 3.07. The 30-inch casing and 24-inch diameter transmission pipe l-132 cross beneath the union pacific rail road near lafayette and gianera streets. In response, pg&e immediately began excavations to assess the pipe condition on october 15, 2014. An emergency excavation notice was sent to the cpuc on october 16 regarding this matter. The casing ends were excavated, the non-hazardous leak has been determined to originate from the bottom of the carrier pipe. The cause of the leak is due to microbiological external corrosion. On october 23, 2014, pressure for l-132 was lowered 20% (from 285 psig to 228 psig) and a safety related condition report was submitted to the DOT and cpuc. This incident was reported to the DOT and cpuc on october 29, 2014 upon determination that response costs are estimated to exceed $50,000. There are no injuries, no fatalities, and no ignition. No media was observed on scene. A liquefied natural gas (lng) installation notification was sent to the cpuc on november 13, 2014 in the event that additional gas supply was required to prevent the loss of customers during repairs. During the shutdown of the transmission line, the feed to this critical regulator station was temporarily supplied with compressed natural gas (cng), as temperatures were mild and the lng support was not required. On november 19, pg&e installed the new 24-inch pipe into the existing 30-inch casing. By november 21 at approximately 2313 hours, pg&e completed tie-in and returned l-132 to normal operating pressure of 285 psig. |
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