Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-12-02 — TX
Operator
El Paso Natural Gas Co
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$600
Incident datetime
2024-12-02 00:00 UTC
Report number
Location
TX
Narrative
On 11/07/2024 at 22:39 mst gas control received a "station trip" alarm and called a technician to the site. Due to heavy snow and ice on the roads, the technician arrived on site at 23:55 mst on 11/07/2024. Upon arrival, the technician confirmed that a discharge vent valve was venting natural gas. At 00:10 am mst on 11/08/2024, the technician manually closed the vent valve and the station was isolated. At 00:39 mst on 11/08/2024 an erl call was initiated and began at 00:55 mst. At 01:01 mst on 11/08/2024, a report was submitted to the nrc. Upon investigation, it was discovered that the most probable cause of the unintentional opening of the vent valve was due to a loss of dc power at the corroded terminal strip or the intermittent failure of the dc solenoid valve. Necessary repairs were made and the station was restarted on 11/09/2024 at 13:30 mst.
Detailed record list
Report Received Date
2024-12-02 00:00:00
Iyear
2024
Report Number
20240134
Supplemental Number
40819
Report Type
Supplemental Final
Operator Id
4280
Name
El Paso Natural Gas Co
Operator Street Address
1001 Louisiana St, Ste 1000
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002-5089
Time Zone
Mountain
Daylight Savings Ind
No
Location Latitude
34.993393
Location Longitude
-107.31573
Nrc Rpt Num
1415867
Additional Nrc Report Numbers
1415958
Commodity Released Type
Natural Gas
Unintentional Release
26234.9
Intentional Release
364
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Nm
Onshore Postal Code
87026
Onshore City Name
Mesita
Onshore County Name
Cibola
Designated Location
Survey Station No.
Designated Name
33+46
Pipe Fac Name
Laguna Station
Segment Name
6548
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Esd System, But Excluding Product Drain Lines And Tubing
Installation Year
1953
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Valve Defaulted To Open
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
639
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
35679
Est Cost Intentional Release
495
Est Cost Prop Damage
600
Est Cost Emergency
3100
Est Cost Other
0
Gas Cost In Mcf
1.36
Prpty
39874
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
602
Gas Flow In Pipe In Mcf
435000
Mop Psig
836
Mop Cfr Section
192.619(C)
Maop Established Date
1970-07-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
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
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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 controller responded to the alarm appropriately.
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
Esd System Failure Ind
Yes
Additional Electricity Ind
Yes
Preparer Name
G****** J**** D****
Preparer Title
Pipeline Engineer Codes And Standards
Preparer Email
G************@k***********.com
Preparer Telephone
8329770230
Authorizer Name
Z*** R*****
Authorizer Title
Director Of Codes And Standards
Authorizer Telephone
7134202609
Authorizer Email
Z**********@k***********.com
Narrative
On 11/07/2024 at 22:39 mst gas control received a "station trip" alarm and called a technician to the site. Due to heavy snow and ice on the roads, the technician arrived on site at 23:55 mst on 11/07/2024. Upon arrival, the technician confirmed that a discharge vent valve was venting natural gas. At 00:10 am mst on 11/08/2024, the technician manually closed the vent valve and the station was isolated. At 00:39 mst on 11/08/2024 an erl call was initiated and began at 00:55 mst. At 01:01 mst on 11/08/2024, a report was submitted to the nrc. Upon investigation, it was discovered that the most probable cause of the unintentional opening of the vent valve was due to a loss of dc power at the corroded terminal strip or the intermittent failure of the dc solenoid valve. Necessary repairs were made and the station was restarted on 11/09/2024 at 13:30 mst.
| Report Received Date | 2024-12-02 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240134 |
| Supplemental Number | 40819 |
| Report Type | Supplemental Final |
| Operator Id | 4280 PHMSA Enforcement |
| Name | El Paso Natural Gas Co |
| Operator Street Address | 1001 Louisiana St, Ste 1000 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002-5089 |
| Time Zone | Mountain |
| Daylight Savings Ind | No |
| Location Latitude | 34.993393 Google Maps OpenStreetMap |
| Location Longitude | -107.31573 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1415867 NRC Report How to search |
| Additional Nrc Report Numbers | 1415958 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 26234.9 |
| Intentional Release | 364 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Nm |
| Onshore Postal Code | 87026 |
| Onshore City Name | Mesita |
| Onshore County Name | Cibola |
| Designated Location | Survey Station No. |
| Designated Name | 33+46 |
| Pipe Fac Name | Laguna Station |
| Segment Name | 6548 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Esd System, But Excluding Product Drain Lines And Tubing |
| Installation Year | 1953 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Valve Defaulted To Open |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 639 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 35679 |
| Est Cost Intentional Release | 495 |
| Est Cost Prop Damage | 600 |
| Est Cost Emergency | 3100 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 1.36 |
| Prpty | 39874 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 602 |
| Gas Flow In Pipe In Mcf | 435000 |
| Mop Psig | 836 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Maop Established Date | 1970-07-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| 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 | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| 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 controller responded to the alarm appropriately. |
| 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 |
| Esd System Failure Ind | Yes |
| Additional Electricity Ind | Yes |
| Preparer Name | G****** J**** D**** |
| Preparer Title | Pipeline Engineer Codes And Standards |
| Preparer Email | G************@k***********.com |
| Preparer Telephone | 8329770230 |
| Authorizer Name | Z*** R***** |
| Authorizer Title | Director Of Codes And Standards |
| Authorizer Telephone | 7134202609 |
| Authorizer Email | Z**********@k***********.com |
| Narrative | On 11/07/2024 at 22:39 mst gas control received a "station trip" alarm and called a technician to the site. Due to heavy snow and ice on the roads, the technician arrived on site at 23:55 mst on 11/07/2024. Upon arrival, the technician confirmed that a discharge vent valve was venting natural gas. At 00:10 am mst on 11/08/2024, the technician manually closed the vent valve and the station was isolated. At 00:39 mst on 11/08/2024 an erl call was initiated and began at 00:55 mst. At 01:01 mst on 11/08/2024, a report was submitted to the nrc. Upon investigation, it was discovered that the most probable cause of the unintentional opening of the vent valve was due to a loss of dc power at the corroded terminal strip or the intermittent failure of the dc solenoid valve. Necessary repairs were made and the station was restarted on 11/09/2024 at 13:30 mst. |
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