Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2013-03-22 — TX
Operator
Enbridge Pipelines (Ozark) L.l.c.
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$105,450
Incident datetime
2013-03-22 14:00
Report number
Location
TX
Narrative
On february 22, 2013 at approximately 10:30, an enbridge employee observed oil in the cushing central terminal in the manifold 111 vicinity. Initially it was suspected to be historic in nature. Hydo vacuuming activities of the soil continued in attempt to confirm that this was indeed historical. By march 4 the source had not yet been determined and still suspected to be historic. On this date it became clear the incident was going to exceed the reporting threshold of $50,000 and 5 gallons. At this point a precautionary call was made to the nrc. After continued investigation, a flange was identified as a possible source although it was not leaking at the time it was uncovered. Additional hydro vacuuming and monitoring continued over the next few weeks with no leak source identified. On march 22 pressure was applied to the line in an attempt to verify whether the flange was or was not the source. After pressurization it was determined that the flange connection was indeed leaking. It was determined that the torqueing of the connection had relaxed over time. The flange bolts were re-torqued and the small amount of oil that had leaked out of the flange was cleaned up and the system was put back into service. As a preventative measure, the gasket was replaced april 6. Removal of contaminated soil from the release site was completed on april 10. Due to the unusual nature of this incident, the date entered in part a, question 4 is the date that oil was first observed, but thought to be historical. The date entered in part a, question 18 is the date discovery of the source was identified and it was determined in fact to be an actual leak and not historical in nature. Enbridge has been in contact with the PHMSA southwest region accident coordinator to verify that, in this instance, this would be the correct course of action.
Detailed record list
Report Received Date
2013-04-02 00:00:00
Iyear
2013
Report Number
20130123
Supplemental Number
18445
Report Type
Supplemental Final
Operator Id
31947
Name
Enbridge Pipelines (Ozark) L.l.c.
Operator Street Address
915 N Eldridge Parkway, Suite 1100
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Local Datetime
2013-02-22 10:30:00
Location Latitude
35.95778
Location Longitude
-96.74944
Commodity Released Type
Crude Oil
Unintentional Release Bbls
0.36
Recovered Bbls
0.36
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2013-03-22 14:00:00
System Part Involved
Onshore Terminal/tank Farm Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Release Was Caused By A Leaking Flange On Manifold
On Site Datetime
2013-03-22 14:00:00
Nrc Rpt Datetime
2013-03-04 16:30:00
Nrc Rpt Num
1040054
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Cushing Central Terminal
Segment Name
Manifold 111
Onshore State Abbreviation
Ok
Onshore Postal Code
74023
Onshore City Name
Cushing
Onshore County Name
Payne
Designated Location
Survey Station No.
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
36
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Flange Assembly
Installation Year
1970
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Connection Failure
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
100
Est Cost Prop Damage
105450
Est Cost Emergency
5000
Est Cost Environmental
8000
Est Cost Other
0
Prpty
118550
Accident Psig
250
Mop Psig
275
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
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
A release of this magnitude and flow rate would not be detected by control room.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Non-Threaded Connection Failure
Eq Failure Type
Non-Threaded Connection Failure
Other Non Threaded Ind
Other
Other Non Threaded Details
Flange Connection
Eq Additional Other Ind
Yes
Eq Additional Other Details
Torqueing Relaxed Over Time
Preparer Name
S**** S****
Preparer Title
Compliance Analyst
Preparer Email
S**********@e*******.com
Preparer Telephone
218-464-5754
Preparer Fax
218-464-5992
Prepared Date
2013-08-12 00:00:00
Authorizer Name
D**** S*******
Authorizer Telephone
218-464-5751
Authorizer Title
Manager Us Pipeline Compliance
Authorizer Email
D*************@e*******.com
Narrative
On february 22, 2013 at approximately 10:30, an enbridge employee observed oil in the cushing central terminal in the manifold 111 vicinity. Initially it was suspected to be historic in nature. Hydo vacuuming activities of the soil continued in attempt to confirm that this was indeed historical. By march 4 the source had not yet been determined and still suspected to be historic. On this date it became clear the incident was going to exceed the reporting threshold of $50,000 and 5 gallons. At this point a precautionary call was made to the nrc. After continued investigation, a flange was identified as a possible source although it was not leaking at the time it was uncovered. Additional hydro vacuuming and monitoring continued over the next few weeks with no leak source identified. On march 22 pressure was applied to the line in an attempt to verify whether the flange was or was not the source. After pressurization it was determined that the flange connection was indeed leaking. It was determined that the torqueing of the connection had relaxed over time. The flange bolts were re-torqued and the small amount of oil that had leaked out of the flange was cleaned up and the system was put back into service. As a preventative measure, the gasket was replaced april 6. Removal of contaminated soil from the release site was completed on april 10. Due to the unusual nature of this incident, the date entered in part a, question 4 is the date that oil was first observed, but thought to be historical. The date entered in part a, question 18 is the date discovery of the source was identified and it was determined in fact to be an actual leak and not historical in nature. Enbridge has been in contact with the PHMSA southwest region accident coordinator to verify that, in this instance, this would be the correct course of action.
| Report Received Date | 2013-04-02 00:00:00 |
|---|---|
| Iyear | 2013 |
| Report Number | 20130123 |
| Supplemental Number | 18445 |
| Report Type | Supplemental Final |
| Operator Id | 31947 PHMSA Enforcement |
| Name | Enbridge Pipelines (Ozark) L.l.c. |
| Operator Street Address | 915 N Eldridge Parkway, Suite 1100 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Local Datetime | 2013-02-22 10:30:00 |
| Location Latitude | 35.95778 Google Maps OpenStreetMap |
| Location Longitude | -96.74944 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 0.36 |
| Recovered Bbls | 0.36 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2013-03-22 14:00:00 |
| System Part Involved | Onshore Terminal/tank Farm Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Release Was Caused By A Leaking Flange On Manifold |
| On Site Datetime | 2013-03-22 14:00:00 |
| Nrc Rpt Datetime | 2013-03-04 16:30:00 |
| Nrc Rpt Num | 1040054 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Cushing Central Terminal |
| Segment Name | Manifold 111 |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 74023 |
| Onshore City Name | Cushing |
| Onshore County Name | Payne |
| Designated Location | Survey Station No. |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 36 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Flange Assembly |
| Installation Year | 1970 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 100 |
| Est Cost Prop Damage | 105450 |
| Est Cost Emergency | 5000 |
| Est Cost Environmental | 8000 |
| Est Cost Other | 0 |
| Prpty | 118550 |
| Accident Psig | 250 |
| Mop Psig | 275 |
| 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 | 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 | A release of this magnitude and flow rate would not be detected by control room. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Non-Threaded Connection Failure |
| Eq Failure Type | Non-Threaded Connection Failure |
| Other Non Threaded Ind | Other |
| Other Non Threaded Details | Flange Connection |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Torqueing Relaxed Over Time |
| Preparer Name | S**** S**** |
| Preparer Title | Compliance Analyst |
| Preparer Email | S**********@e*******.com |
| Preparer Telephone | 218-464-5754 |
| Preparer Fax | 218-464-5992 |
| Prepared Date | 2013-08-12 00:00:00 |
| Authorizer Name | D**** S******* |
| Authorizer Telephone | 218-464-5751 |
| Authorizer Title | Manager Us Pipeline Compliance |
| Authorizer Email | D*************@e*******.com |
| Narrative | On february 22, 2013 at approximately 10:30, an enbridge employee observed oil in the cushing central terminal in the manifold 111 vicinity. Initially it was suspected to be historic in nature. Hydo vacuuming activities of the soil continued in attempt to confirm that this was indeed historical. By march 4 the source had not yet been determined and still suspected to be historic. On this date it became clear the incident was going to exceed the reporting threshold of $50,000 and 5 gallons. At this point a precautionary call was made to the nrc. After continued investigation, a flange was identified as a possible source although it was not leaking at the time it was uncovered. Additional hydro vacuuming and monitoring continued over the next few weeks with no leak source identified. On march 22 pressure was applied to the line in an attempt to verify whether the flange was or was not the source. After pressurization it was determined that the flange connection was indeed leaking. It was determined that the torqueing of the connection had relaxed over time. The flange bolts were re-torqued and the small amount of oil that had leaked out of the flange was cleaned up and the system was put back into service. As a preventative measure, the gasket was replaced april 6. Removal of contaminated soil from the release site was completed on april 10. Due to the unusual nature of this incident, the date entered in part a, question 4 is the date that oil was first observed, but thought to be historical. The date entered in part a, question 18 is the date discovery of the source was identified and it was determined in fact to be an actual leak and not historical in nature. Enbridge has been in contact with the PHMSA southwest region accident coordinator to verify that, in this instance, this would be the correct course of action. |
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