Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2021-01-02 — OK
Operator
Oneok Gas Transportation, Llc
Cause
Incorrect Operation
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2021-01-02 09:30
Report number
Location
OK
Narrative
10/20/22 update: added county 5/21/21 update: jan. 2nd, 2021 oneok employee identified the ogt thomas compressor was venting gas to atmosphere at approximately 9:20am. Employee initiated esd of the station at 9:34am. The station logs identified venting began approximately at 12:39am. It was determined that loss of instrument air allowed the station esd suction & discharge vent valves to open releasing gas. The oneok investigation discovered the loss of instrument air was not identified because the instrument air pressure transmitter manifold valve was found in closed position. An oneok employee had inspected the valve in april and the valve was in the correct position. Since april there was numerous maintenance and construction activities at thomas compressor facility. Knowing the valve was in the proper position in april, then closed at the time of the release, with the other activities that took place at the facility, oneok is unable to determine who closed the valve or when the valve was closed. After completion of the investigation, the thomas compressor was returned to service.
Detailed record list
Report Received Date
2021-01-27 00:00:00
Iyear
2021
Report Number
20210010
Supplemental Number
37243
Report Type
Supplemental Final
Operator Id
31286
Name
Oneok Gas Transportation, Llc
Operator Street Address
100 West Fifth Street
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74103
Local Datetime
2021-01-02 09:30:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
35.728056
Location Longitude
-98.801389
Nrc Rpt Num
1295377
Nrc Rpt Datetime
2021-01-02 11:05:00
Additional Nrc Report Numbers
1295443
Commodity Released Type
Natural Gas
Unintentional Release
127718.8
Intentional Release
0
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
Shutdown Datetime
2021-01-02 09:34:00
Restart Datetime
2021-01-04 12:00:00
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2021-01-02 09:30:00
On Site Datetime
2021-01-02 09:30:00
On Off Shore
Onshore
Onshore State Abbreviation
Ok
Onshore Postal Code
73669
Onshore City Name
Not Within A Municipality
Onshore County Name
Custer
Designated Location
Not Applicable
Pipe Fac Name
Thomas Compressor Station
Segment Name
M-2
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
Intrastate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Compressor
Installation Year
2015
Manufactured Year
2015
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
The Release Occurred Through The Relief Valve.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
660
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
291837
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
2.285
Prpty
291837
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
868
Gas Flow In Pipe In Mcf
15
Mop Psig
985
Mop Cfr Section
192.619(A)(1)
Maop Established Date
2015-12-01 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
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
The cause was due to field related issues.
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
Root Valve On Transmitter Was Closed
Related No Proc Ind
Yes
Related Other Ind
Yes
Operation Related Details
Root Valve For Transmitter Was Closed.
Category Type
Routine Maintenance
Operator Qualification Ind
No
Preparer Name
P**** G**** R****
Preparer Title
Compliance Specialist
Preparer Email
P***************@o****.com
Preparer Telephone
5807471324
Local Contact Name
P**** G**** R****
Local Contact Email
P***************@o****.com
Local Contact Telephone
5807471324
Authorizer Name
R**** M*******
Authorizer Title
Operations Manager
Authorizer Telephone
918-497-8407
Authorizer Email
R*************@o****.com
Narrative
10/20/22 update: added county 5/21/21 update: jan. 2nd, 2021 oneok employee identified the ogt thomas compressor was venting gas to atmosphere at approximately 9:20am. Employee initiated esd of the station at 9:34am. The station logs identified venting began approximately at 12:39am. It was determined that loss of instrument air allowed the station esd suction & discharge vent valves to open releasing gas. The oneok investigation discovered the loss of instrument air was not identified because the instrument air pressure transmitter manifold valve was found in closed position. An oneok employee had inspected the valve in april and the valve was in the correct position. Since april there was numerous maintenance and construction activities at thomas compressor facility. Knowing the valve was in the proper position in april, then closed at the time of the release, with the other activities that took place at the facility, oneok is unable to determine who closed the valve or when the valve was closed. After completion of the investigation, the thomas compressor was returned to service.
| Report Received Date | 2021-01-27 00:00:00 |
|---|---|
| Iyear | 2021 |
| Report Number | 20210010 |
| Supplemental Number | 37243 |
| Report Type | Supplemental Final |
| Operator Id | 31286 PHMSA Enforcement |
| Name | Oneok Gas Transportation, Llc |
| Operator Street Address | 100 West Fifth Street |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74103 |
| Local Datetime | 2021-01-02 09:30:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 35.728056 Google Maps OpenStreetMap |
| Location Longitude | -98.801389 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1295377 NRC Report How to search |
| Nrc Rpt Datetime | 2021-01-02 11:05:00 |
| Additional Nrc Report Numbers | 1295443 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 127718.8 |
| Intentional Release | 0 |
| 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 |
| Shutdown Datetime | 2021-01-02 09:34:00 |
| Restart Datetime | 2021-01-04 12:00:00 |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2021-01-02 09:30:00 |
| On Site Datetime | 2021-01-02 09:30:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 73669 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Custer |
| Designated Location | Not Applicable |
| Pipe Fac Name | Thomas Compressor Station |
| Segment Name | M-2 |
| 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 | Intrastate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Compressor |
| Installation Year | 2015 |
| Manufactured Year | 2015 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | The Release Occurred Through The Relief Valve. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 660 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 291837 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.285 |
| Prpty | 291837 |
| 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 | 868 |
| Gas Flow In Pipe In Mcf | 15 |
| Mop Psig | 985 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 2015-12-01 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 | 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 | The cause was due to field related issues. |
| 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 | Root Valve On Transmitter Was Closed |
| Related No Proc Ind | Yes |
| Related Other Ind | Yes |
| Operation Related Details | Root Valve For Transmitter Was Closed. |
| Category Type | Routine Maintenance |
| Operator Qualification Ind | No |
| Preparer Name | P**** G**** R**** |
| Preparer Title | Compliance Specialist |
| Preparer Email | P***************@o****.com |
| Preparer Telephone | 5807471324 |
| Local Contact Name | P**** G**** R**** |
| Local Contact Email | P***************@o****.com |
| Local Contact Telephone | 5807471324 |
| Authorizer Name | R**** M******* |
| Authorizer Title | Operations Manager |
| Authorizer Telephone | 918-497-8407 |
| Authorizer Email | R*************@o****.com |
| Narrative | 10/20/22 update: added county 5/21/21 update: jan. 2nd, 2021 oneok employee identified the ogt thomas compressor was venting gas to atmosphere at approximately 9:20am. Employee initiated esd of the station at 9:34am. The station logs identified venting began approximately at 12:39am. It was determined that loss of instrument air allowed the station esd suction & discharge vent valves to open releasing gas. The oneok investigation discovered the loss of instrument air was not identified because the instrument air pressure transmitter manifold valve was found in closed position. An oneok employee had inspected the valve in april and the valve was in the correct position. Since april there was numerous maintenance and construction activities at thomas compressor facility. Knowing the valve was in the proper position in april, then closed at the time of the release, with the other activities that took place at the facility, oneok is unable to determine who closed the valve or when the valve was closed. After completion of the investigation, the thomas compressor was returned to service. |
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