Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2011-02-25 — TX
Operator
Enbridge Pipelines (North Dakota) Llc
Cause
Incorrect Operation
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2011-02-25 08:25
Report number
Location
TX
Narrative
On the morning of february 25, 2011, the minot area maintenance technician noticed that the sump in the incoming manifold area had overflowed and there was crude oil on the ground. Sump maintenance was being performed on february 24, 2011 due to paraffin build up on the sump bottom, causing the mechanical sump pump switch to fail. The minot area utility/gauger was circulating the sump with chemical to dissolve the paraffin build up. The discharge valve from the sump pump was closed and the bypass was open while circulating the sump. The minot area utility/gauger was called to berthold for an emergency line locate. The minot area utility/gauger left the sump circulating and when he returned to minot at 5:30 p.M. He forgot he had left the sump pump running. Control center contacted the minot area supervisor at approximately 8:10 p.M., noticing that the sump pump was still running from the maintenance activities in the afternoon. The minot area supervisor arrived on site at approximately the same time as he was already in route to the facility due to meeting smart pig tracking crew on site. He confirmed that the sump pump was still running. He opened the discharge valve and closed the bypass valve to pump the sump out. When the tank level was down, he turned the sump pump off, left the hoa switch in the off position and the discharge valve in the open position. He then left the facility for the evening. Interviews determined that the area supervisor thought that the bottom switch would not activate and thought it was better to deactivate the sump (there are no pump seal drains connected to this sump) rather than have the sump not shutoff on low level. The employee called the control center to see if alarms had cleared but did not notify the control center that the sump pump hoa switch was in an off position and unable to start. It was later determined product had back-flowed into the sump through the discharge check valve on the sump pump, leading to sump overflow.
Detailed record list
Report Received Date
2011-03-16 00:00:00
Iyear
2011
Report Number
20110092
Supplemental Number
17633
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
2011-02-25 08:25:00
Location Latitude
48.24063
Location Longitude
-101.257672
Commodity Released Type
Crude Oil
Unintentional Release Bbls
0.24
Intentional Release Bbls
0
Recovered Bbls
0.24
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Incident Identified Datetime
2011-02-25 08:25:00
System Part Involved
Onshore Terminal/tank Farm Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Not Shut Down - Sump Was Isolated With Valves.
On Site Datetime
2011-02-25 08:25:00
Nrc Rpt Datetime
2011-02-25 10:34:00
Nrc Rpt Num
968515
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Minot Station
Onshore State Abbreviation
Nd
Onshore Postal Code
58703-5002
Onshore City Name
Minot
Onshore County Name
Ward
Designated Location
Milepost/valve Station
Designated Name
Minot Station
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Aboveground
Pipe Facility Type
Interstate
Item Involved
Sump
Release Type
Overfill Or Overflow
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
0
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Environmental
3000
Est Cost Other
0
Prpty
3000
Pipeline Function
> 20% Smys Regulated Transmission
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Tank, Vessel, Or Sump/separator Allowed Or Caused To Overfill Or Overflow
Operation Type
Tank, Vessel, Or Sump/separator Allowed Or Caused To Overfill Or Overflow
Preparer Name
V****** L****
Preparer Title
Manual Administrator
Preparer Email
V************@e*******.com
Preparer Telephone
701-857-0852
Preparer Fax
701-857-0858
Prepared Date
2013-03-20 00:00:00
Authorizer Name
D**** K*******
Authorizer Telephone
701-857-0856
Authorizer Title
Supervisor Support Services
Authorizer Email
D*************@e*******.com
Narrative
On the morning of february 25, 2011, the minot area maintenance technician noticed that the sump in the incoming manifold area had overflowed and there was crude oil on the ground. Sump maintenance was being performed on february 24, 2011 due to paraffin build up on the sump bottom, causing the mechanical sump pump switch to fail. The minot area utility/gauger was circulating the sump with chemical to dissolve the paraffin build up. The discharge valve from the sump pump was closed and the bypass was open while circulating the sump. The minot area utility/gauger was called to berthold for an emergency line locate. The minot area utility/gauger left the sump circulating and when he returned to minot at 5:30 p.M. He forgot he had left the sump pump running. Control center contacted the minot area supervisor at approximately 8:10 p.M., noticing that the sump pump was still running from the maintenance activities in the afternoon. The minot area supervisor arrived on site at approximately the same time as he was already in route to the facility due to meeting smart pig tracking crew on site. He confirmed that the sump pump was still running. He opened the discharge valve and closed the bypass valve to pump the sump out. When the tank level was down, he turned the sump pump off, left the hoa switch in the off position and the discharge valve in the open position. He then left the facility for the evening. Interviews determined that the area supervisor thought that the bottom switch would not activate and thought it was better to deactivate the sump (there are no pump seal drains connected to this sump) rather than have the sump not shutoff on low level. The employee called the control center to see if alarms had cleared but did not notify the control center that the sump pump hoa switch was in an off position and unable to start. It was later determined product had back-flowed into the sump through the discharge check valve on the sump pump, leading to sump overflow.
| Report Received Date | 2011-03-16 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110092 |
| Supplemental Number | 17633 |
| 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 | 2011-02-25 08:25:00 |
| Location Latitude | 48.24063 Google Maps OpenStreetMap |
| Location Longitude | -101.257672 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 0.24 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0.24 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Incident Identified Datetime | 2011-02-25 08:25:00 |
| System Part Involved | Onshore Terminal/tank Farm Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Not Shut Down - Sump Was Isolated With Valves. |
| On Site Datetime | 2011-02-25 08:25:00 |
| Nrc Rpt Datetime | 2011-02-25 10:34:00 |
| Nrc Rpt Num | 968515 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Minot Station |
| Onshore State Abbreviation | Nd |
| Onshore Postal Code | 58703-5002 |
| Onshore City Name | Minot |
| Onshore County Name | Ward |
| Designated Location | Milepost/valve Station |
| Designated Name | Minot Station |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Pipe Facility Type | Interstate |
| Item Involved | Sump |
| Release Type | Overfill Or Overflow |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 3000 |
| Est Cost Other | 0 |
| Prpty | 3000 |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Tank, Vessel, Or Sump/separator Allowed Or Caused To Overfill Or Overflow |
| Operation Type | Tank, Vessel, Or Sump/separator Allowed Or Caused To Overfill Or Overflow |
| Preparer Name | V****** L**** |
| Preparer Title | Manual Administrator |
| Preparer Email | V************@e*******.com |
| Preparer Telephone | 701-857-0852 |
| Preparer Fax | 701-857-0858 |
| Prepared Date | 2013-03-20 00:00:00 |
| Authorizer Name | D**** K******* |
| Authorizer Telephone | 701-857-0856 |
| Authorizer Title | Supervisor Support Services |
| Authorizer Email | D*************@e*******.com |
| Narrative | On the morning of february 25, 2011, the minot area maintenance technician noticed that the sump in the incoming manifold area had overflowed and there was crude oil on the ground. Sump maintenance was being performed on february 24, 2011 due to paraffin build up on the sump bottom, causing the mechanical sump pump switch to fail. The minot area utility/gauger was circulating the sump with chemical to dissolve the paraffin build up. The discharge valve from the sump pump was closed and the bypass was open while circulating the sump. The minot area utility/gauger was called to berthold for an emergency line locate. The minot area utility/gauger left the sump circulating and when he returned to minot at 5:30 p.M. He forgot he had left the sump pump running. Control center contacted the minot area supervisor at approximately 8:10 p.M., noticing that the sump pump was still running from the maintenance activities in the afternoon. The minot area supervisor arrived on site at approximately the same time as he was already in route to the facility due to meeting smart pig tracking crew on site. He confirmed that the sump pump was still running. He opened the discharge valve and closed the bypass valve to pump the sump out. When the tank level was down, he turned the sump pump off, left the hoa switch in the off position and the discharge valve in the open position. He then left the facility for the evening. Interviews determined that the area supervisor thought that the bottom switch would not activate and thought it was better to deactivate the sump (there are no pump seal drains connected to this sump) rather than have the sump not shutoff on low level. The employee called the control center to see if alarms had cleared but did not notify the control center that the sump pump hoa switch was in an off position and unable to start. It was later determined product had back-flowed into the sump through the discharge check valve on the sump pump, leading to sump overflow. |
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