Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2022-07-08 — TX
Operator
Osage Pipe Line Company, Llc
Cause
Material Failure Of Pipe Or Weld
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$1,795,080
Incident datetime
2022-07-08 00:29
Report number
Location
TX
Narrative
On friday, july 8, 2022 at appx. 12:29 am cst, the artesia control center received a loss of suction alarm on the osage pipeline, which resulted in a shutdown of the mainline pump at cushing. This alarm also triggered the automatic shutdown of the ralston pump station at 12:30 am cst and the hardy pump station at 12:32 am cst. Another alarm occurred at 12:35 am cst. Osage personnel began to investigate the potential cause of the alarms and contacted the upstream operator as part of this effort. Osage restarted its mainline pump at cushing at 12:40 am cst (the ralston and hardy stations remained offline), and received another alarm. Osage then shut down the mainline pump at cushing at 12:43 am cst and began closing in valves. Osage local operating personnel were dispatched for further investigation and arrived on-site at appx. 2:16 am cst. These personnel did not immediately identify any signs of a release. Personnel then began to further investigate by moving along the row when, at appx. 3:26 am cst, they identified signs of heavy hydrocarbon on the ground as well as overspray on pipeline markers. Personnel immediately made contact back to the artesia control room and their immediate supervisor. Osage also made internal notifications to operations management, r/ehs team members as well as osros. Osage then dispatched other local operating personnel and emergency resources, and activated corporate emergency response support personnel. Osage made immediate, external agency notifications to the nrc and odeq at appx. 4:05 am cst. At appx. 5:59 cst, local operating personnel were able to identify the source of the release. Based off initial data trends, calculations and on-site visual observation, there was an estimated 5,769 bbls of crude released. Update on 03/30/2023: following further investigation, osage now estimates 7,110 bbls of crude were released. To note, the method used to calculate the amount of barrels released has a +/- error rate of 7%, or approximately 487 barrels. If osage determines this number should be changed, osage will file a supplemental report. Initial response activities occurred up to 7/12/2022 and then shifted to on-going, bulk recovery and repairs needed for pipeline restart, which occurred on 7/18/2022. Osage has determined the cause of release to be stacked hook cracks present in the pipe at the time of manufacture that grew over time due to pressure cycle induced fatigue. Update on 8/17/23: because the accident report requires a numerical value in sec. A9, and PHMSA has directed osage to insert a value, osage has entered '6,567.12' which is an estimated minimum value. To note, based on its data, osage believes that nearly all of the estimated 7,110 barrels released into the environment have been recovered. The majority of crude oil recovered was stored in a tank (plains t-500), which also contained water, and the two substances cannot be measured separately. The estimated minimum value provided in sec. A9 is derived from subtracting the t-500 opening volume (10,231.88 barrels) from the t-500 closing volume 16,799 barrels (which is net of 20% estimated water content). Other unknown amounts of recovered crude oil were disposed in an uic well (entrained in disposed water), in a landfill (with investigation-derived waste, ppe, absorbent booms, etc.), remained in frac tanks used to store water for disposal in the uic well, and some product may have also evaporated. Lastly, certain small amounts of crude oil may remain in soil and sediment at the site and are subject to an on-going environmental field investigation. For these reasons, osage is providing a minimum estimated volume of commodity recovered as 6,567.12. But believes that nearly all of the 7,110 estimated as released have been recovered.
Detailed record list
Report Received Date
2022-08-05 00:00:00
Iyear
2022
Report Number
20220172
Supplemental Number
38418
Report Type
Supplemental Final
Operator Id
14391
Name
Osage Pipe Line Company, Llc
Operator Street Address
2323 Victory Ave. Suite 1400
Operator City Name
Dallas
Operator State Abbreviation
TX
Operator Postal Code
75219
Local Datetime
2022-07-08 00:29:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
36.02967
Location Longitude
-96.730621
Commodity Released Type
Crude Oil
Unintentional Release Bbls
7110
Recovered Bbls
6567.12
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
Incident Identified Datetime
2022-07-08 00:29:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2022-07-08 00:43:00
Restart Datetime
2022-07-18 09:45:00
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Initial Responder Com Datetime
2022-07-08 04:30:00
On Site Datetime
2022-07-08 03:26:00
Confirmed Discovery Datetime
2022-07-08 03:26:00
Nrc Rpt Datetime
2022-07-08 04:05:00
Nrc Rpt Num
1340898
Additional Nrc Report Numbers
1341082
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Close Datetime
2022-07-08 00:45:00
Upstream Valve Type Ind
Remotely Controlled
Downstream Action Taken
Valve Closure
Downstream Vlv Close Datetime
2022-07-08 00:50:00
Downstream Valve Type Ind
Remotely Controlled
Notify Qualified Indiv Ind
Yes
Qualified Indiv Notif Datetime
2022-07-08 00:50:00
Oil Spill Removal Org Ind
Yes
Osro Activated Datetime
2022-07-08 03:35:00
Osro Arrived On Site Dt
7/8/2022 6:45
Num Pub Evacuated
0
Pipe Fac Name
Osage
Segment Name
Osage 1007
Onshore State Abbreviation
Ok
Onshore Postal Code
74023
Onshore City Name
Cushing
Onshore County Name
Payne
Designated Location
Milepost
Designated Name
Mp 7
Federal
No
Location Type
Originated On Operator-Controlled Property, But Then Flowed Or Migrated Off The Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
180
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Seam
Pipe Diameter
20
Pipe Wall Thickness
0.25
Pipe Smys
60000
Pipe Specification
Api 5l
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
Stupp
Pipe Coating Type
Coal Tar
Coating Applied Ind
No
Installation Year
1975
Manufactured Year
1975
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Longitudinal
Rupture Width
4.5
Rupture Length
57
Wildlife Impact Ind
Yes
Fish Aquatic Impact Ind
Yes
Birds Impact Ind
Yes
Terrestrial Impact Ind
Yes
Soil Contamination
Yes
Long Term Assessment
Yes
Remediation Ind
Yes
Surface Water Remed Ind
Yes
Soil Remed Ind
Yes
Vegetation Remed Ind
Yes
Wildlife Remed Ind
Yes
Water Contam Ind
Yes
Surface Contam Ind
Yes
Amount Released
7110
Rel Water Name
Skull Creek
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
30000000
Est Cost Gas Released
54744
Est Cost Prop Damage
1795080
Est Cost Emergency
4135604
Est Cost Environmental
1000000
Est Cost Other
0
Prpty
36985428
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
867
Mop Psig
1080
Mop Cfr Section
Other
Mop Cfr Section Details
Hydostatic Pressure Testing
Maop Established Date
1975-01-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
54912
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
Yes
Scada Conf Ind
No
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
Yes
Cpm Conf Ind
No
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest Schedule Ind
Yes
Invest Incorrect Action Ind
Yes
Invest Other Ind
Yes
Invest Other Ind Details
The Investigation Determined That Controller Actions Contributed To A Brief Delay In Responding To Initial Leak Alarms.
Employee Drug Test Ind
Yes
Contractor Drug Test Ind
No
Num Employees Tested
1
Num Employees Failed
0
Cause
Material Failure Of Pipe Or Weld
Cause Details
Original Manufacturing-Related (Not Girth Weld Or Other Welds Formed In The Field)
Metallurgical Ind
Yes
Failure Type
Original Manufacturing-Related (Not Girth Weld Or Other Welds Formed In The Field)
Fatigue Vibr Related
Yes
Failure Subtype
Pressure-Related
Additional Crack Ind
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Cir Trn Wave Mgn Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2018
Axial Rcnt Propul Method
Free Swimming
Axial Rcnt Attuned Detect
Metal Loss
Axial Rcnt Atnd Dtct Metal
High Resolution
Axial Previous Year
2008
Axial Prev Propul Method
Free Swimming
Axial Prev Attuned Detect
Metal Loss
Axial Prev Atnd Dtct Metal
High Resolution
Circ Wave Recent Year
2014
Circ Wv Rcnt Propul Method
Free Swimming
Circ Wv Rcnt Resolution
High Resolution
Circ Wv Previous Year
2009
Circ Wv Prev Propul Method
Free Swimming
Circ Wv Prev Resolution
High Resolution
Geometry Recent Year
2018
Geometry Rcnt Propul Method
Free Swimming
Geometry Rcnt Resolution
High Resolution
Geometrt Rcnt Measur Cups
Inside Ili Cups
Geometry Previous Year
2014
Geometry Prev Propul Method
Free Swimming
Geometry Prev Resolution
High Resolution
Geometrt Prev Measur Cups
Inside Ili Cups
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Io Inadequate Procedure Ind
Yes
Preparer Name
B******** T*****
Preparer Title
Pipeline Regulatory Manager
Preparer Email
B***************@h**********.com
Preparer Telephone
2149546652
Prepared Date
2023-08-17 00:00:00
Authorizer Name
L*** C*******
Authorizer Telephone
2149546662
Authorizer Title
Vp Compliance And Ehs
Authorizer Email
L************@h**********.com
Narrative
On friday, july 8, 2022 at appx. 12:29 am cst, the artesia control center received a loss of suction alarm on the osage pipeline, which resulted in a shutdown of the mainline pump at cushing. This alarm also triggered the automatic shutdown of the ralston pump station at 12:30 am cst and the hardy pump station at 12:32 am cst. Another alarm occurred at 12:35 am cst. Osage personnel began to investigate the potential cause of the alarms and contacted the upstream operator as part of this effort. Osage restarted its mainline pump at cushing at 12:40 am cst (the ralston and hardy stations remained offline), and received another alarm. Osage then shut down the mainline pump at cushing at 12:43 am cst and began closing in valves. Osage local operating personnel were dispatched for further investigation and arrived on-site at appx. 2:16 am cst. These personnel did not immediately identify any signs of a release. Personnel then began to further investigate by moving along the row when, at appx. 3:26 am cst, they identified signs of heavy hydrocarbon on the ground as well as overspray on pipeline markers. Personnel immediately made contact back to the artesia control room and their immediate supervisor. Osage also made internal notifications to operations management, r/ehs team members as well as osros. Osage then dispatched other local operating personnel and emergency resources, and activated corporate emergency response support personnel. Osage made immediate, external agency notifications to the nrc and odeq at appx. 4:05 am cst. At appx. 5:59 cst, local operating personnel were able to identify the source of the release. Based off initial data trends, calculations and on-site visual observation, there was an estimated 5,769 bbls of crude released. Update on 03/30/2023: following further investigation, osage now estimates 7,110 bbls of crude were released. To note, the method used to calculate the amount of barrels released has a +/- error rate of 7%, or approximately 487 barrels. If osage determines this number should be changed, osage will file a supplemental report. Initial response activities occurred up to 7/12/2022 and then shifted to on-going, bulk recovery and repairs needed for pipeline restart, which occurred on 7/18/2022. Osage has determined the cause of release to be stacked hook cracks present in the pipe at the time of manufacture that grew over time due to pressure cycle induced fatigue. Update on 8/17/23: because the accident report requires a numerical value in sec. A9, and PHMSA has directed osage to insert a value, osage has entered '6,567.12' which is an estimated minimum value. To note, based on its data, osage believes that nearly all of the estimated 7,110 barrels released into the environment have been recovered. The majority of crude oil recovered was stored in a tank (plains t-500), which also contained water, and the two substances cannot be measured separately. The estimated minimum value provided in sec. A9 is derived from subtracting the t-500 opening volume (10,231.88 barrels) from the t-500 closing volume 16,799 barrels (which is net of 20% estimated water content). Other unknown amounts of recovered crude oil were disposed in an uic well (entrained in disposed water), in a landfill (with investigation-derived waste, ppe, absorbent booms, etc.), remained in frac tanks used to store water for disposal in the uic well, and some product may have also evaporated. Lastly, certain small amounts of crude oil may remain in soil and sediment at the site and are subject to an on-going environmental field investigation. For these reasons, osage is providing a minimum estimated volume of commodity recovered as 6,567.12. But believes that nearly all of the 7,110 estimated as released have been recovered.
| Report Received Date | 2022-08-05 00:00:00 |
|---|---|
| Iyear | 2022 |
| Report Number | 20220172 |
| Supplemental Number | 38418 |
| Report Type | Supplemental Final |
| Operator Id | 14391 PHMSA Enforcement |
| Name | Osage Pipe Line Company, Llc |
| Operator Street Address | 2323 Victory Ave. Suite 1400 |
| Operator City Name | Dallas |
| Operator State Abbreviation | TX |
| Operator Postal Code | 75219 |
| Local Datetime | 2022-07-08 00:29:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 36.02967 Google Maps OpenStreetMap |
| Location Longitude | -96.730621 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 7110 |
| Recovered Bbls | 6567.12 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| Incident Identified Datetime | 2022-07-08 00:29:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2022-07-08 00:43:00 |
| Restart Datetime | 2022-07-18 09:45:00 |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Initial Responder Com Datetime | 2022-07-08 04:30:00 |
| On Site Datetime | 2022-07-08 03:26:00 |
| Confirmed Discovery Datetime | 2022-07-08 03:26:00 |
| Nrc Rpt Datetime | 2022-07-08 04:05:00 |
| Nrc Rpt Num | 1340898 NRC Report How to search |
| Additional Nrc Report Numbers | 1341082 |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Close Datetime | 2022-07-08 00:45:00 |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Action Taken | Valve Closure |
| Downstream Vlv Close Datetime | 2022-07-08 00:50:00 |
| Downstream Valve Type Ind | Remotely Controlled |
| Notify Qualified Indiv Ind | Yes |
| Qualified Indiv Notif Datetime | 2022-07-08 00:50:00 |
| Oil Spill Removal Org Ind | Yes |
| Osro Activated Datetime | 2022-07-08 03:35:00 |
| Osro Arrived On Site Dt | 7/8/2022 6:45 |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Osage |
| Segment Name | Osage 1007 |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 74023 |
| Onshore City Name | Cushing |
| Onshore County Name | Payne |
| Designated Location | Milepost |
| Designated Name | Mp 7 |
| Federal | No |
| Location Type | Originated On Operator-Controlled Property, But Then Flowed Or Migrated Off The Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 180 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Seam |
| Pipe Diameter | 20 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 60000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | Stupp |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | No |
| Installation Year | 1975 |
| Manufactured Year | 1975 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Longitudinal |
| Rupture Width | 4.5 |
| Rupture Length | 57 |
| Wildlife Impact Ind | Yes |
| Fish Aquatic Impact Ind | Yes |
| Birds Impact Ind | Yes |
| Terrestrial Impact Ind | Yes |
| Soil Contamination | Yes |
| Long Term Assessment | Yes |
| Remediation Ind | Yes |
| Surface Water Remed Ind | Yes |
| Soil Remed Ind | Yes |
| Vegetation Remed Ind | Yes |
| Wildlife Remed Ind | Yes |
| Water Contam Ind | Yes |
| Surface Contam Ind | Yes |
| Amount Released | 7110 |
| Rel Water Name | Skull Creek |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 30000000 |
| Est Cost Gas Released | 54744 |
| Est Cost Prop Damage | 1795080 |
| Est Cost Emergency | 4135604 |
| Est Cost Environmental | 1000000 |
| Est Cost Other | 0 |
| Prpty | 36985428 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 867 |
| Mop Psig | 1080 |
| Mop Cfr Section | Other View CFR 49 §192 |
| Mop Cfr Section Details | Hydostatic Pressure Testing |
| Maop Established Date | 1975-01-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 54912 |
| 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 | Yes |
| Scada Conf Ind | No |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | Yes |
| Cpm Conf Ind | No |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest Schedule Ind | Yes |
| Invest Incorrect Action Ind | Yes |
| Invest Other Ind | Yes |
| Invest Other Ind Details | The Investigation Determined That Controller Actions Contributed To A Brief Delay In Responding To Initial Leak Alarms. |
| Employee Drug Test Ind | Yes |
| Contractor Drug Test Ind | No |
| Num Employees Tested | 1 |
| Num Employees Failed | 0 |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Original Manufacturing-Related (Not Girth Weld Or Other Welds Formed In The Field) |
| Metallurgical Ind | Yes |
| Failure Type | Original Manufacturing-Related (Not Girth Weld Or Other Welds Formed In The Field) |
| Fatigue Vibr Related | Yes |
| Failure Subtype | Pressure-Related |
| Additional Crack Ind | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Cir Trn Wave Mgn Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2018 |
| Axial Rcnt Propul Method | Free Swimming |
| Axial Rcnt Attuned Detect | Metal Loss |
| Axial Rcnt Atnd Dtct Metal | High Resolution |
| Axial Previous Year | 2008 |
| Axial Prev Propul Method | Free Swimming |
| Axial Prev Attuned Detect | Metal Loss |
| Axial Prev Atnd Dtct Metal | High Resolution |
| Circ Wave Recent Year | 2014 |
| Circ Wv Rcnt Propul Method | Free Swimming |
| Circ Wv Rcnt Resolution | High Resolution |
| Circ Wv Previous Year | 2009 |
| Circ Wv Prev Propul Method | Free Swimming |
| Circ Wv Prev Resolution | High Resolution |
| Geometry Recent Year | 2018 |
| Geometry Rcnt Propul Method | Free Swimming |
| Geometry Rcnt Resolution | High Resolution |
| Geometrt Rcnt Measur Cups | Inside Ili Cups |
| Geometry Previous Year | 2014 |
| Geometry Prev Propul Method | Free Swimming |
| Geometry Prev Resolution | High Resolution |
| Geometrt Prev Measur Cups | Inside Ili Cups |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Io Inadequate Procedure Ind | Yes |
| Preparer Name | B******** T***** |
| Preparer Title | Pipeline Regulatory Manager |
| Preparer Email | B***************@h**********.com |
| Preparer Telephone | 2149546652 |
| Prepared Date | 2023-08-17 00:00:00 |
| Authorizer Name | L*** C******* |
| Authorizer Telephone | 2149546662 |
| Authorizer Title | Vp Compliance And Ehs |
| Authorizer Email | L************@h**********.com |
| Narrative | On friday, july 8, 2022 at appx. 12:29 am cst, the artesia control center received a loss of suction alarm on the osage pipeline, which resulted in a shutdown of the mainline pump at cushing. This alarm also triggered the automatic shutdown of the ralston pump station at 12:30 am cst and the hardy pump station at 12:32 am cst. Another alarm occurred at 12:35 am cst. Osage personnel began to investigate the potential cause of the alarms and contacted the upstream operator as part of this effort. Osage restarted its mainline pump at cushing at 12:40 am cst (the ralston and hardy stations remained offline), and received another alarm. Osage then shut down the mainline pump at cushing at 12:43 am cst and began closing in valves. Osage local operating personnel were dispatched for further investigation and arrived on-site at appx. 2:16 am cst. These personnel did not immediately identify any signs of a release. Personnel then began to further investigate by moving along the row when, at appx. 3:26 am cst, they identified signs of heavy hydrocarbon on the ground as well as overspray on pipeline markers. Personnel immediately made contact back to the artesia control room and their immediate supervisor. Osage also made internal notifications to operations management, r/ehs team members as well as osros. Osage then dispatched other local operating personnel and emergency resources, and activated corporate emergency response support personnel. Osage made immediate, external agency notifications to the nrc and odeq at appx. 4:05 am cst. At appx. 5:59 cst, local operating personnel were able to identify the source of the release. Based off initial data trends, calculations and on-site visual observation, there was an estimated 5,769 bbls of crude released. Update on 03/30/2023: following further investigation, osage now estimates 7,110 bbls of crude were released. To note, the method used to calculate the amount of barrels released has a +/- error rate of 7%, or approximately 487 barrels. If osage determines this number should be changed, osage will file a supplemental report. Initial response activities occurred up to 7/12/2022 and then shifted to on-going, bulk recovery and repairs needed for pipeline restart, which occurred on 7/18/2022. Osage has determined the cause of release to be stacked hook cracks present in the pipe at the time of manufacture that grew over time due to pressure cycle induced fatigue. Update on 8/17/23: because the accident report requires a numerical value in sec. A9, and PHMSA has directed osage to insert a value, osage has entered '6,567.12' which is an estimated minimum value. To note, based on its data, osage believes that nearly all of the estimated 7,110 barrels released into the environment have been recovered. The majority of crude oil recovered was stored in a tank (plains t-500), which also contained water, and the two substances cannot be measured separately. The estimated minimum value provided in sec. A9 is derived from subtracting the t-500 opening volume (10,231.88 barrels) from the t-500 closing volume 16,799 barrels (which is net of 20% estimated water content). Other unknown amounts of recovered crude oil were disposed in an uic well (entrained in disposed water), in a landfill (with investigation-derived waste, ppe, absorbent booms, etc.), remained in frac tanks used to store water for disposal in the uic well, and some product may have also evaporated. Lastly, certain small amounts of crude oil may remain in soil and sediment at the site and are subject to an on-going environmental field investigation. For these reasons, osage is providing a minimum estimated volume of commodity recovered as 6,567.12. But believes that nearly all of the 7,110 estimated as released have been recovered. |
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