Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2015-04-10 — OK
Operator
Explorer Pipeline Co
Cause
Equipment Failure
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)
$25,000
Incident datetime
2015-04-10 12:00
Report number
Location
OK
Narrative
On april 10, 2015 an explorer pipeline employee arrived at a remote block valve and identified some stained gravel and a slight petroleum product odor. The pipeline was shut down and an investigation into the source began. A qualified contractor crew arrived on location and began excavating the m&j m303 block valve. When it was determined the cost for the work to the block valve could meet or exceed $50,000 notification was made to the national response center. However, only about 1 pint of free phase product had been identified at the time. After exposing the pipeline and the block valve, the source of the release was confirmed to be a flanged connection, with an insulating kit on the downstream flanged connection of the block valve. Explorer pipeline elected to cutout the flanged block valve and installed a new weld-in block valve. Approximately 1,200 cubic yards of soil was removed and tested and indicated approximately 4.48 barrels of product was in the soil. Third party tests were conducted on the insulating kit. The analytical report from the third party was reviewed and not enough information was present to identify that the gasket was the root cause. During the investigation it was also determined some non-related anomaly digs were conduct in 1998 and 2003 directly downstream of the block valve. However, not enough information is available to conclude that pipe strain was the root cause. Since the release in april 2015, monitoring wells have been installed on all block valve locations, a leak survey was conducted, and a survey of the insulating kits used in the liquid operators was conducted to confirm no systemic issue.
Detailed record list
Report Received Date
2015-05-08 00:00:00
Iyear
2015
Report Number
20150167
Supplemental Number
21428
Report Type
Supplemental Final
Operator Id
4805
Name
Explorer Pipeline Co
Operator Street Address
Po Box 2650
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74101
Local Datetime
2015-04-10 12:00:00
Location Latitude
38.264829
Location Longitude
-91.503997
Commodity Released Type
Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions
Commodity Subtype
Mixture Of Refined Products (Transmix Or Other Mixture)
Unintentional Release Bbls
4.48
Recovered Bbls
4.48
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2015-04-10 12:00:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2015-04-10 12:20:00
Restart Datetime
2015-04-11 00:43:00
On Site Datetime
2015-04-10 12:00:00
Nrc Rpt Datetime
2015-04-10 20:31:00
Nrc Rpt Num
1113269
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Automatic
Downstream Valve Type Ind
Automatic
Num Pub Evacuated
0
Pipe Fac Name
Block Valve
Segment Name
Glenpool To Wood River
Onshore State Abbreviation
Mo
Onshore Postal Code
65066
Onshore City Name
Owensville
Onshore County Name
Gasconade
Designated Location
Milepost/valve Station
Designated Name
304.76
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
42
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Flange Assembly
Installation Year
1971
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
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
150
Est Cost Prop Damage
25000
Est Cost Emergency
75000
Est Cost Environmental
200000
Est Cost Other
0
Prpty
300150
Accident Psig
524
Mop Psig
877
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
212346
Internal Inspection Ind
Yes
Operation Complications 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
The controller actions or inactions did not cause or contribute to the seeping of a flanged connection.
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
Gasket
Additional Support Ind
Yes
Preparer Name
K**** B****
Preparer Title
Dot Administrator
Preparer Email
K*****@e***.com
Preparer Telephone
9184935104
Prepared Date
2016-06-08 00:00:00
Authorizer Name
J** S****
Authorizer Telephone
9184935143
Authorizer Title
Director Engineering And Hsse
Authorizer Email
J*****@e***.com
Narrative
On april 10, 2015 an explorer pipeline employee arrived at a remote block valve and identified some stained gravel and a slight petroleum product odor. The pipeline was shut down and an investigation into the source began. A qualified contractor crew arrived on location and began excavating the m&j m303 block valve. When it was determined the cost for the work to the block valve could meet or exceed $50,000 notification was made to the national response center. However, only about 1 pint of free phase product had been identified at the time. After exposing the pipeline and the block valve, the source of the release was confirmed to be a flanged connection, with an insulating kit on the downstream flanged connection of the block valve. Explorer pipeline elected to cutout the flanged block valve and installed a new weld-in block valve. Approximately 1,200 cubic yards of soil was removed and tested and indicated approximately 4.48 barrels of product was in the soil. Third party tests were conducted on the insulating kit. The analytical report from the third party was reviewed and not enough information was present to identify that the gasket was the root cause. During the investigation it was also determined some non-related anomaly digs were conduct in 1998 and 2003 directly downstream of the block valve. However, not enough information is available to conclude that pipe strain was the root cause. Since the release in april 2015, monitoring wells have been installed on all block valve locations, a leak survey was conducted, and a survey of the insulating kits used in the liquid operators was conducted to confirm no systemic issue.
| Report Received Date | 2015-05-08 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150167 |
| Supplemental Number | 21428 |
| Report Type | Supplemental Final |
| Operator Id | 4805 PHMSA Enforcement |
| Name | Explorer Pipeline Co |
| Operator Street Address | Po Box 2650 |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74101 |
| Local Datetime | 2015-04-10 12:00:00 |
| Location Latitude | 38.264829 Google Maps OpenStreetMap |
| Location Longitude | -91.503997 Google Maps OpenStreetMap |
| Commodity Released Type | Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions |
| Commodity Subtype | Mixture Of Refined Products (Transmix Or Other Mixture) |
| Unintentional Release Bbls | 4.48 |
| Recovered Bbls | 4.48 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2015-04-10 12:00:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2015-04-10 12:20:00 |
| Restart Datetime | 2015-04-11 00:43:00 |
| On Site Datetime | 2015-04-10 12:00:00 |
| Nrc Rpt Datetime | 2015-04-10 20:31:00 |
| Nrc Rpt Num | 1113269 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Automatic |
| Downstream Valve Type Ind | Automatic |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Block Valve |
| Segment Name | Glenpool To Wood River |
| Onshore State Abbreviation | Mo |
| Onshore Postal Code | 65066 |
| Onshore City Name | Owensville |
| Onshore County Name | Gasconade |
| Designated Location | Milepost/valve Station |
| Designated Name | 304.76 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 42 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Flange Assembly |
| Installation Year | 1971 |
| 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 | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 150 |
| Est Cost Prop Damage | 25000 |
| Est Cost Emergency | 75000 |
| Est Cost Environmental | 200000 |
| Est Cost Other | 0 |
| Prpty | 300150 |
| Accident Psig | 524 |
| Mop Psig | 877 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 212346 |
| Internal Inspection Ind | Yes |
| Operation Complications 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 | The controller actions or inactions did not cause or contribute to the seeping of a flanged connection. |
| 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 | Gasket |
| Additional Support Ind | Yes |
| Preparer Name | K**** B**** |
| Preparer Title | Dot Administrator |
| Preparer Email | K*****@e***.com |
| Preparer Telephone | 9184935104 |
| Prepared Date | 2016-06-08 00:00:00 |
| Authorizer Name | J** S**** |
| Authorizer Telephone | 9184935143 |
| Authorizer Title | Director Engineering And Hsse |
| Authorizer Email | J*****@e***.com |
| Narrative | On april 10, 2015 an explorer pipeline employee arrived at a remote block valve and identified some stained gravel and a slight petroleum product odor. The pipeline was shut down and an investigation into the source began. A qualified contractor crew arrived on location and began excavating the m&j m303 block valve. When it was determined the cost for the work to the block valve could meet or exceed $50,000 notification was made to the national response center. However, only about 1 pint of free phase product had been identified at the time. After exposing the pipeline and the block valve, the source of the release was confirmed to be a flanged connection, with an insulating kit on the downstream flanged connection of the block valve. Explorer pipeline elected to cutout the flanged block valve and installed a new weld-in block valve. Approximately 1,200 cubic yards of soil was removed and tested and indicated approximately 4.48 barrels of product was in the soil. Third party tests were conducted on the insulating kit. The analytical report from the third party was reviewed and not enough information was present to identify that the gasket was the root cause. During the investigation it was also determined some non-related anomaly digs were conduct in 1998 and 2003 directly downstream of the block valve. However, not enough information is available to conclude that pipe strain was the root cause. Since the release in april 2015, monitoring wells have been installed on all block valve locations, a leak survey was conducted, and a survey of the insulating kits used in the liquid operators was conducted to confirm no systemic issue. |
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