Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-07-24 — OH
Operator
Marathon Pipe Line Llc
Cause
Incorrect Operation
Commodity
Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2023-07-24 00:00 UTC
Report number
Location
OH
Narrative
On 07/10/2023 at 09:30 mountain time, contractors were making weld repairs on leg striker plates when the tank leg caught fire due to gasoline being trapped between the leg and striker plate. The tank was isolated from normal operations as it was idle for an API 653 inspection/maintenance. The fire was immediately extinguished, and work stopped. Operations was notified at 10:30 mountain time and stakeholders determined that an nrc notification should be made. Supplemental update 08/22/2023 the tank cleaning procedure specifies the movement of the tank leg, by either lifting or tapping with a hammer, against the striker plate as a means to break the seal created by cohesive forces of a liquid that could be trapped inside the tank leg. As a result of the investigation, it was determined that there was a process error in which some discretion in the degree of movement of the leg against the striker plate allowed for the liquid to remain trapped inside the leg. In order to remedy this issue, the tank cleaning procedure will be updated to require cold drilling for all tank legs that do not have drainage holes. Operational personnel did not believe that employee performance was a contributing factor in this incident, but, rather, that the failure was the result of gaps in the procedure. Mpl agrees that its procedure should be clarified. Additionally, it is educating operational personnel regarding the requirements of post-accident drug and alcohol testing. Supplemental 03/08/2023 - updated d7 and d7a to correct erroneously reported hca determinations, the accident occurred in an opa and hpa.
Detailed record list
Report Received Date
2023-07-24 00:00:00
Iyear
2023
Report Number
20230169
Supplemental Number
39302
Report Type
Supplemental Final
Operator Id
32147
Name
Marathon Pipe Line Llc
Operator Street Address
539 South Main Street
Operator City Name
Findlay
Operator State Abbreviation
OH
Operator Postal Code
45840
Time Zone
Mountain
Daylight Savings Ind
Yes
Location Latitude
43.60672
Location Longitude
-116.24912
Commodity Released Type
Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions
Commodity Subtype
Gasoline (Non-Ethanol)
Unintentional Release Bbls
0.1
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
System Part Involved
Onshore Breakout Tank Or Storage Vessel, Including Attached Appurtenances
On Off Shore
Onshore
Status When Identified
Idle
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Nrc Rpt Num
1372680
Additional Nrc Report Numbers
1372816
Ignite Ind
Yes
How Extinguished
Operator/contractor
Consumed By Fire In Barrels
0.1
Explode Ind
No
Notify Qualified Indiv Ind
No
Oil Spill Removal Org Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Northwest Products System
Segment Name
Boise Terminal
Onshore State Abbreviation
Id
Onshore Postal Code
83706
Onshore City Name
Boise
Onshore County Name
Ada
Designated Location
Survey Station No.
Designated Name
Boise Termina
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Tank, Including Attached Appurtenances
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Tank/vessel
Tank Vessel Subtype
Appurtenance
Tank Type
Atmospheric
Safe Fill Level
0
Safe Fill Level Exceeded Ind
No
Api Std Out Of Service Year
2023
Api Std In Service Year
2022
Installation Year
1956
Manufactured Year
1956
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Accidental Ignition - Residual Trapped Gasoline Ignited During Welding Operations.
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
Yes
High Pop Ind
Yes
High Pop Yes No
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
15
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
15
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
0
Pressure Restriction Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
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
This incident occurred on an out of service tank and the control room had no impact on the incident.
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
Accidental Ignition During Welding Operation.
Related Inadequate Proc Ind
Yes
Category Type
Other Maintenance
Operator Qualification Ind
No
Preparer Name
Z*** C*********
Preparer Title
Compliance Specialist
Preparer Email
Z***********@m***.com
Preparer Telephone
4196726607
Prepared Date
2024-03-08 00:00:00
Authorizer Name
M****** G***
Authorizer Telephone
4193794019
Authorizer Title
Regulatory Compliance Manager
Authorizer Email
M*****@m****************.com
Narrative
On 07/10/2023 at 09:30 mountain time, contractors were making weld repairs on leg striker plates when the tank leg caught fire due to gasoline being trapped between the leg and striker plate. The tank was isolated from normal operations as it was idle for an API 653 inspection/maintenance. The fire was immediately extinguished, and work stopped. Operations was notified at 10:30 mountain time and stakeholders determined that an nrc notification should be made. Supplemental update 08/22/2023 the tank cleaning procedure specifies the movement of the tank leg, by either lifting or tapping with a hammer, against the striker plate as a means to break the seal created by cohesive forces of a liquid that could be trapped inside the tank leg. As a result of the investigation, it was determined that there was a process error in which some discretion in the degree of movement of the leg against the striker plate allowed for the liquid to remain trapped inside the leg. In order to remedy this issue, the tank cleaning procedure will be updated to require cold drilling for all tank legs that do not have drainage holes. Operational personnel did not believe that employee performance was a contributing factor in this incident, but, rather, that the failure was the result of gaps in the procedure. Mpl agrees that its procedure should be clarified. Additionally, it is educating operational personnel regarding the requirements of post-accident drug and alcohol testing. Supplemental 03/08/2023 - updated d7 and d7a to correct erroneously reported hca determinations, the accident occurred in an opa and hpa.
| Report Received Date | 2023-07-24 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230169 |
| Supplemental Number | 39302 |
| Report Type | Supplemental Final |
| Operator Id | 32147 PHMSA Enforcement |
| Name | Marathon Pipe Line Llc |
| Operator Street Address | 539 South Main Street |
| Operator City Name | Findlay |
| Operator State Abbreviation | OH |
| Operator Postal Code | 45840 |
| Time Zone | Mountain |
| Daylight Savings Ind | Yes |
| Location Latitude | 43.60672 Google Maps OpenStreetMap |
| Location Longitude | -116.24912 Google Maps OpenStreetMap |
| Commodity Released Type | Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions |
| Commodity Subtype | Gasoline (Non-Ethanol) |
| Unintentional Release Bbls | 0.1 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| System Part Involved | Onshore Breakout Tank Or Storage Vessel, Including Attached Appurtenances |
| On Off Shore | Onshore |
| Status When Identified | Idle |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Nrc Rpt Num | 1372680 NRC Report How to search |
| Additional Nrc Report Numbers | 1372816 |
| Ignite Ind | Yes |
| How Extinguished | Operator/contractor |
| Consumed By Fire In Barrels | 0.1 |
| Explode Ind | No |
| Notify Qualified Indiv Ind | No |
| Oil Spill Removal Org Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Northwest Products System |
| Segment Name | Boise Terminal |
| Onshore State Abbreviation | Id |
| Onshore Postal Code | 83706 |
| Onshore City Name | Boise |
| Onshore County Name | Ada |
| Designated Location | Survey Station No. |
| Designated Name | Boise Termina |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Tank, Including Attached Appurtenances |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Tank/vessel |
| Tank Vessel Subtype | Appurtenance |
| Tank Type | Atmospheric |
| Safe Fill Level | 0 |
| Safe Fill Level Exceeded Ind | No |
| Api Std Out Of Service Year | 2023 |
| Api Std In Service Year | 2022 |
| Installation Year | 1956 |
| Manufactured Year | 1956 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Accidental Ignition - Residual Trapped Gasoline Ignited During Welding Operations. |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| High Pop Ind | Yes |
| High Pop Yes No | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 15 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 15 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 0 |
| Pressure Restriction Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| 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 | This incident occurred on an out of service tank and the control room had no impact on the incident. |
| 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 | Accidental Ignition During Welding Operation. |
| Related Inadequate Proc Ind | Yes |
| Category Type | Other Maintenance |
| Operator Qualification Ind | No |
| Preparer Name | Z*** C********* |
| Preparer Title | Compliance Specialist |
| Preparer Email | Z***********@m***.com |
| Preparer Telephone | 4196726607 |
| Prepared Date | 2024-03-08 00:00:00 |
| Authorizer Name | M****** G*** |
| Authorizer Telephone | 4193794019 |
| Authorizer Title | Regulatory Compliance Manager |
| Authorizer Email | M*****@m****************.com |
| Narrative | On 07/10/2023 at 09:30 mountain time, contractors were making weld repairs on leg striker plates when the tank leg caught fire due to gasoline being trapped between the leg and striker plate. The tank was isolated from normal operations as it was idle for an API 653 inspection/maintenance. The fire was immediately extinguished, and work stopped. Operations was notified at 10:30 mountain time and stakeholders determined that an nrc notification should be made. Supplemental update 08/22/2023 the tank cleaning procedure specifies the movement of the tank leg, by either lifting or tapping with a hammer, against the striker plate as a means to break the seal created by cohesive forces of a liquid that could be trapped inside the tank leg. As a result of the investigation, it was determined that there was a process error in which some discretion in the degree of movement of the leg against the striker plate allowed for the liquid to remain trapped inside the leg. In order to remedy this issue, the tank cleaning procedure will be updated to require cold drilling for all tank legs that do not have drainage holes. Operational personnel did not believe that employee performance was a contributing factor in this incident, but, rather, that the failure was the result of gaps in the procedure. Mpl agrees that its procedure should be clarified. Additionally, it is educating operational personnel regarding the requirements of post-accident drug and alcohol testing. Supplemental 03/08/2023 - updated d7 and d7a to correct erroneously reported hca determinations, the accident occurred in an opa and hpa. |
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