Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2012-11-13 — TX
Operator
Enbridge Pipelines (North Dakota) Llc
Cause
Corrosion Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$734,810
Incident datetime
2012-11-13 08:35
Report number
Location
TX
Narrative
On november 13, 2012 a release was discovered within the bermed area of minot tank 6006. The release was identified during a daily inspection by operation personnel. The control center was immediately notified, the piping was isolated, and remedial actions began. The release location was in the 6 o'clock orientation on the tank 6006 tank suction/discharge line. A plidco sleeve was installed onto the pipe to contain the release and facilitate recovery and clean-up activities. A 5 foot 5-1/2 inch long pipe segment was cut out for a more thorough investigation. At the time the release was discovered, the pipeline was already shut down for a plc upgrade and therefore question #14b. In part a was answered as no - the facility was not shutdown due to the release. Oil was discovered within the bermed area of tank 6006 during a daily inspection at 08:35 (cst). The pipeline was restarted on 11/14/12 at 23:40 with PHMSA's approval of the restart plan. The emergency response process operated under ics and was documented with an ics 201 packet and continued with the creation of incident action plans. A feasibility analysis was completed and excavation was chosen as the best method for cleanup. A total of 3,206 gallons of oil was released (estimated amounts of released oil included additional barrels captured during drain down of the piping) and a total 3,252 tons of soil was contaminated and disposed of at the sawyer landfill dakota. The contaminated area was contained to 40 feet on either side of the pipe and there are no further risks to human health or the environment at this location. Recovery and clean-up efforts were completed in january 2013. A third party was retained to conduct a metallurgical assessment of the failed piping as well as a root cause investigation. The metallurgical assessment determined the cause was internal corrosion, likely caused by microbiologically influenced corrosion. No other areas of internal or external corrosion were noted in the removed segment, chemical analysis of residue along the 6 o'clock orientation of the pipe was positive for chlorides, and testing indicated the pipe met all requirements of API 5l grade b and API 5lx grade x46 pipe at the time of manufacture.
Detailed record list
Report Received Date
2012-12-12 00:00:00
Iyear
2012
Report Number
20120358
Supplemental Number
19699
Report Type
Supplemental Final
Operator Id
15774
Name
Enbridge Pipelines (North Dakota) Llc
Operator Street Address
915 N Eldridge Parkway, Suite 1100
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Local Datetime
2012-11-13 08:35:00
Location Latitude
48.24275
Location Longitude
-101.25444
Commodity Released Type
Crude Oil
Unintentional Release Bbls
76
Intentional Release Bbls
0
Recovered Bbls
76
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2012-11-13 08:35:00
System Part Involved
Onshore Terminal/tank Farm Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Pipeline Was Not Shut Down Due To Accident - See Narrative For Explanation.
On Site Datetime
2012-11-13 08:35:00
Nrc Rpt Datetime
2012-11-13 10:23:00
Nrc Rpt Num
1030498
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Enbridge Pipelines (North Dakota) Llc/minot Stn
Segment Name
Line 81
Onshore State Abbreviation
Nd
Onshore Postal Code
58701
Onshore City Name
Minot
Onshore County Name
Ward
Designated Location
Survey Station No.
Designated Name
Minot Station
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
60
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
24
Pipe Wall Thickness
0.25
Pipe Smys
35000
Pipe Specification
Api 5l Grade B
Pipe Seam Type
Erw � Unknown Frequency
Pipe Manufacturer
Best Pipe And Steel
Pipe Coating Type
Cold Applied Tape
Installation Year
1982
Manufactured Year
1980
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
Yes
Remediation Ind
Yes
Groundwater Remed Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
Yes
Groundwater Contam Ind
Yes
Amount Released
0
Rel Water Name
Groundwater Directly Under Excavation
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
7600
Est Cost Prop Damage
734810
Est Cost Emergency
734805
Est Cost Environmental
925936
Est Cost Other
0
Prpty
2403151
Accident Psig
95
Mop Psig
285
Accident Pressure
Pressure Did Not Exceed Mop
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
Yes, specify investigation result(s): (select all that apply)
Invest Schedule Ind
Yes
Invest Fatigue Ind
Yes
Invest Incorrect Control Ind
Yes
Invest Maint Ind
Yes
Employee Drug Test Ind
Yes
Contractor Drug Test Ind
No
Num Employees Tested
1
Num Employees Failed
0
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Localized Pitting
Int Microbiological Ind
Yes
Int Field Exam Basis Ind
Yes
Int Metallurgical Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
Yes
Corrosion Lining
No
Cleaning Dewatering
Not Applicable - Not Mainline Pipe
Corrosion Coupons
Not Applicable - Not Mainline Pipe
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
V****** L****
Preparer Title
Compliance Coordinator
Preparer Email
V************@e*******.com
Preparer Telephone
7018570852
Preparer Fax
7018570809
Prepared Date
2014-09-03 00:00:00
Authorizer Name
K**** G****
Authorizer Telephone
7018570880
Authorizer Title
Manager Support Services
Authorizer Email
K**********@e*******.com
Narrative
On november 13, 2012 a release was discovered within the bermed area of minot tank 6006. The release was identified during a daily inspection by operation personnel. The control center was immediately notified, the piping was isolated, and remedial actions began. The release location was in the 6 o'clock orientation on the tank 6006 tank suction/discharge line. A plidco sleeve was installed onto the pipe to contain the release and facilitate recovery and clean-up activities. A 5 foot 5-1/2 inch long pipe segment was cut out for a more thorough investigation. At the time the release was discovered, the pipeline was already shut down for a plc upgrade and therefore question #14b. In part a was answered as no - the facility was not shutdown due to the release. Oil was discovered within the bermed area of tank 6006 during a daily inspection at 08:35 (cst). The pipeline was restarted on 11/14/12 at 23:40 with PHMSA's approval of the restart plan. The emergency response process operated under ics and was documented with an ics 201 packet and continued with the creation of incident action plans. A feasibility analysis was completed and excavation was chosen as the best method for cleanup. A total of 3,206 gallons of oil was released (estimated amounts of released oil included additional barrels captured during drain down of the piping) and a total 3,252 tons of soil was contaminated and disposed of at the sawyer landfill dakota. The contaminated area was contained to 40 feet on either side of the pipe and there are no further risks to human health or the environment at this location. Recovery and clean-up efforts were completed in january 2013. A third party was retained to conduct a metallurgical assessment of the failed piping as well as a root cause investigation. The metallurgical assessment determined the cause was internal corrosion, likely caused by microbiologically influenced corrosion. No other areas of internal or external corrosion were noted in the removed segment, chemical analysis of residue along the 6 o'clock orientation of the pipe was positive for chlorides, and testing indicated the pipe met all requirements of API 5l grade b and API 5lx grade x46 pipe at the time of manufacture.
| Report Received Date | 2012-12-12 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120358 |
| Supplemental Number | 19699 |
| Report Type | Supplemental Final |
| Operator Id | 15774 PHMSA Enforcement |
| Name | Enbridge Pipelines (North Dakota) Llc |
| Operator Street Address | 915 N Eldridge Parkway, Suite 1100 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Local Datetime | 2012-11-13 08:35:00 |
| Location Latitude | 48.24275 Google Maps OpenStreetMap |
| Location Longitude | -101.25444 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 76 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 76 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2012-11-13 08:35:00 |
| System Part Involved | Onshore Terminal/tank Farm Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Pipeline Was Not Shut Down Due To Accident - See Narrative For Explanation. |
| On Site Datetime | 2012-11-13 08:35:00 |
| Nrc Rpt Datetime | 2012-11-13 10:23:00 |
| Nrc Rpt Num | 1030498 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Enbridge Pipelines (North Dakota) Llc/minot Stn |
| Segment Name | Line 81 |
| Onshore State Abbreviation | Nd |
| Onshore Postal Code | 58701 |
| Onshore City Name | Minot |
| Onshore County Name | Ward |
| Designated Location | Survey Station No. |
| Designated Name | Minot Station |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 60 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 24 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 35000 |
| Pipe Specification | Api 5l Grade B |
| Pipe Seam Type | Erw � Unknown Frequency |
| Pipe Manufacturer | Best Pipe And Steel |
| Pipe Coating Type | Cold Applied Tape |
| Installation Year | 1982 |
| Manufactured Year | 1980 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | Yes |
| Remediation Ind | Yes |
| Groundwater Remed Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | Yes |
| Groundwater Contam Ind | Yes |
| Amount Released | 0 |
| Rel Water Name | Groundwater Directly Under Excavation |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 7600 |
| Est Cost Prop Damage | 734810 |
| Est Cost Emergency | 734805 |
| Est Cost Environmental | 925936 |
| Est Cost Other | 0 |
| Prpty | 2403151 |
| Accident Psig | 95 |
| Mop Psig | 285 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| 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 | Yes, specify investigation result(s): (select all that apply) |
| Invest Schedule Ind | Yes |
| Invest Fatigue Ind | Yes |
| Invest Incorrect Control Ind | Yes |
| Invest Maint Ind | Yes |
| Employee Drug Test Ind | Yes |
| Contractor Drug Test Ind | No |
| Num Employees Tested | 1 |
| Num Employees Failed | 0 |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Localized Pitting |
| Int Microbiological Ind | Yes |
| Int Field Exam Basis Ind | Yes |
| Int Metallurgical Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | No |
| Cleaning Dewatering | Not Applicable - Not Mainline Pipe |
| Corrosion Coupons | Not Applicable - Not Mainline Pipe |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | V****** L**** |
| Preparer Title | Compliance Coordinator |
| Preparer Email | V************@e*******.com |
| Preparer Telephone | 7018570852 |
| Preparer Fax | 7018570809 |
| Prepared Date | 2014-09-03 00:00:00 |
| Authorizer Name | K**** G**** |
| Authorizer Telephone | 7018570880 |
| Authorizer Title | Manager Support Services |
| Authorizer Email | K**********@e*******.com |
| Narrative | On november 13, 2012 a release was discovered within the bermed area of minot tank 6006. The release was identified during a daily inspection by operation personnel. The control center was immediately notified, the piping was isolated, and remedial actions began. The release location was in the 6 o'clock orientation on the tank 6006 tank suction/discharge line. A plidco sleeve was installed onto the pipe to contain the release and facilitate recovery and clean-up activities. A 5 foot 5-1/2 inch long pipe segment was cut out for a more thorough investigation. At the time the release was discovered, the pipeline was already shut down for a plc upgrade and therefore question #14b. In part a was answered as no - the facility was not shutdown due to the release. Oil was discovered within the bermed area of tank 6006 during a daily inspection at 08:35 (cst). The pipeline was restarted on 11/14/12 at 23:40 with PHMSA's approval of the restart plan. The emergency response process operated under ics and was documented with an ics 201 packet and continued with the creation of incident action plans. A feasibility analysis was completed and excavation was chosen as the best method for cleanup. A total of 3,206 gallons of oil was released (estimated amounts of released oil included additional barrels captured during drain down of the piping) and a total 3,252 tons of soil was contaminated and disposed of at the sawyer landfill dakota. The contaminated area was contained to 40 feet on either side of the pipe and there are no further risks to human health or the environment at this location. Recovery and clean-up efforts were completed in january 2013. A third party was retained to conduct a metallurgical assessment of the failed piping as well as a root cause investigation. The metallurgical assessment determined the cause was internal corrosion, likely caused by microbiologically influenced corrosion. No other areas of internal or external corrosion were noted in the removed segment, chemical analysis of residue along the 6 o'clock orientation of the pipe was positive for chlorides, and testing indicated the pipe met all requirements of API 5l grade b and API 5lx grade x46 pipe at the time of manufacture. |
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