Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-09-19 — TX
Operator
Unev Pipeline, Llc
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)
$500
Incident datetime
2023-09-19 00:00 UTC
Report number
Location
TX
Narrative
On august 21, 2023, at approximately 8:30 a.M. Mst, local operating personnel arrived onsite to perform work at the lynndyl valve station along the unev pipeline system. Upon arriving, they observed soil staining that had extended a few feet beyond the station's fence line. Personnel immediately informed their supervisor and the hep control center, then proceeded to manually excavate the saturated soil to identify the source of the release. By approximately 4:00 p.M. Mst, personnel had completed the excavation, reaching a depth of approximately 12 inches, an additional 4 inches beyond the stained soil area. They then conducted spill calculations for the affected area, estimating a release of approximately 2 barrels of mixed refined product (diesel and gasoline). At this time, personnel also were able to confirm that there was no ongoing leak. After reaching this determination and consulting with area supervision, personnel believed that the saturated soil may have been due to a prior non-reportable release at the lynndyl station on july 10, 2023. This incident was a result of a failure of a "puck-style" block coming off of the pressure transmitter on the mainline. This release generated a fine mist, which settled on rocks and soil within the station's fence line. At the time of the july 10 release, personnel estimated a volume of no more than 2 gallons, leading to internal notifications and an event entry into hep's incident management system. Following this event, and over the period of july 10 to august 21, the area experienced significant rainfall. During these weather events, personnel periodically inspected this, and other area sites, for signs of any new issues arising from the weather. No evidence of any new releases were discovered at this site. In response to the release volume of approximately 2 barrels on august 21, notifications were made to the national response center (nrc) and the utah department of environmental quality (udeq). It's worth noting that, although the initial nrc report indicates a timestamp of 16:04, there was an approximate half-hour delay before the call was actually answered. As of this report, the apparent cause of the initial, non-reportable release on july 10 is believed to be the failure of the "puck-style" block off of the pressure transmitter. Operating personnel have confirmed, by the manufacturer, the correct installation of the transmitter and all connecting equipment, leading them to presume that the failure was due to a flawed design. Presently, the failed pressure transmitter (manufactured by rosemount) and the "puck-style" block has been replaced with a honeywell-manufactured pressure transmitter. Update 9/13/2024 - hf sinclair midstream contracted trc to conduct site remediation efforts. In collaboration with the utah department of environmental quality (udeq), trc developed a comprehensive remediation plan. The plan was submitted to udeq on august 12, 2024, and subsequently approved on august 28. Hf sinclair midstream is currently awaiting a revised proposal from trc, with remediation work scheduled to begin in the coming months.
Detailed record list
Report Received Date
2023-09-19 00:00:00
Iyear
2023
Report Number
20230222
Supplemental Number
40005
Report Type
Supplemental
Operator Id
32493
Name
Unev Pipeline, Llc
Operator Street Address
2323 Victory Ave. Suite 1400
Operator City Name
Dallas
Operator State Abbreviation
TX
Operator Postal Code
75219
Time Zone
Mountain
Daylight Savings Ind
No
Location Latitude
39.568301
Location Longitude
-112.343739
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
2
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Notification From Public
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
Communication State Fed Ind
No
Nrc Rpt Num
1376864
Additional Nrc Report Numbers
1376932
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Type Ind
Remotely Controlled
Downstream Action Taken
Valve Closure
Downstream Valve Type Ind
Remotely Controlled
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Unev
Segment Name
Lynndyl Valve Station
Onshore State Abbreviation
Ut
Onshore Postal Code
84640
Onshore City Name
Not Within A Municipality
Onshore County Name
Juab
Designated Location
Milepost
Designated Name
Mp 119
Federal
No
Location Type
Originated On Operator-Controlled Property, But Then Flowed Or Migrated Off The Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Instrumentation
Installation Year
2022
Manufactured Year
Unknown
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
275
Est Cost Prop Damage
500
Est Cost Emergency
25500
Est Cost Environmental
63000
Est Cost Other
0
Prpty
89275
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
863
Mop Psig
1480
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2022-04-27 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
522720
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
This event did not warrant an investigation of controller actions.
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
Additional Defect Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Failure Is Believed To Be Due To Poor Design Of The Components.
Preparer Name
D***** B****
Preparer Title
Pipeline Regulatory Manager
Preparer Email
D***********@h*********.com
Preparer Telephone
9727955457
Prepared Date
2024-09-13 00:00:00
Authorizer Name
D***** B****
Authorizer Telephone
9727955457
Authorizer Title
Pipeline Regulatory Manager
Authorizer Email
D***********@h*********.com
Narrative
On august 21, 2023, at approximately 8:30 a.M. Mst, local operating personnel arrived onsite to perform work at the lynndyl valve station along the unev pipeline system. Upon arriving, they observed soil staining that had extended a few feet beyond the station's fence line. Personnel immediately informed their supervisor and the hep control center, then proceeded to manually excavate the saturated soil to identify the source of the release. By approximately 4:00 p.M. Mst, personnel had completed the excavation, reaching a depth of approximately 12 inches, an additional 4 inches beyond the stained soil area. They then conducted spill calculations for the affected area, estimating a release of approximately 2 barrels of mixed refined product (diesel and gasoline). At this time, personnel also were able to confirm that there was no ongoing leak. After reaching this determination and consulting with area supervision, personnel believed that the saturated soil may have been due to a prior non-reportable release at the lynndyl station on july 10, 2023. This incident was a result of a failure of a "puck-style" block coming off of the pressure transmitter on the mainline. This release generated a fine mist, which settled on rocks and soil within the station's fence line. At the time of the july 10 release, personnel estimated a volume of no more than 2 gallons, leading to internal notifications and an event entry into hep's incident management system. Following this event, and over the period of july 10 to august 21, the area experienced significant rainfall. During these weather events, personnel periodically inspected this, and other area sites, for signs of any new issues arising from the weather. No evidence of any new releases were discovered at this site. In response to the release volume of approximately 2 barrels on august 21, notifications were made to the national response center (nrc) and the utah department of environmental quality (udeq). It's worth noting that, although the initial nrc report indicates a timestamp of 16:04, there was an approximate half-hour delay before the call was actually answered. As of this report, the apparent cause of the initial, non-reportable release on july 10 is believed to be the failure of the "puck-style" block off of the pressure transmitter. Operating personnel have confirmed, by the manufacturer, the correct installation of the transmitter and all connecting equipment, leading them to presume that the failure was due to a flawed design. Presently, the failed pressure transmitter (manufactured by rosemount) and the "puck-style" block has been replaced with a honeywell-manufactured pressure transmitter. Update 9/13/2024 - hf sinclair midstream contracted trc to conduct site remediation efforts. In collaboration with the utah department of environmental quality (udeq), trc developed a comprehensive remediation plan. The plan was submitted to udeq on august 12, 2024, and subsequently approved on august 28. Hf sinclair midstream is currently awaiting a revised proposal from trc, with remediation work scheduled to begin in the coming months.
| Report Received Date | 2023-09-19 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230222 |
| Supplemental Number | 40005 |
| Report Type | Supplemental |
| Operator Id | 32493 PHMSA Enforcement |
| Name | Unev Pipeline, Llc |
| Operator Street Address | 2323 Victory Ave. Suite 1400 |
| Operator City Name | Dallas |
| Operator State Abbreviation | TX |
| Operator Postal Code | 75219 |
| Time Zone | Mountain |
| Daylight Savings Ind | No |
| Location Latitude | 39.568301 Google Maps OpenStreetMap |
| Location Longitude | -112.343739 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 | 2 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Notification From Public |
| 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 |
| Communication State Fed Ind | No |
| Nrc Rpt Num | 1376864 NRC Report How to search |
| Additional Nrc Report Numbers | 1376932 |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Action Taken | Valve Closure |
| Downstream Valve Type Ind | Remotely Controlled |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Unev |
| Segment Name | Lynndyl Valve Station |
| Onshore State Abbreviation | Ut |
| Onshore Postal Code | 84640 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Juab |
| Designated Location | Milepost |
| Designated Name | Mp 119 |
| Federal | No |
| Location Type | Originated On Operator-Controlled Property, But Then Flowed Or Migrated Off The Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Instrumentation |
| Installation Year | 2022 |
| Manufactured Year | Unknown |
| 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 | 275 |
| Est Cost Prop Damage | 500 |
| Est Cost Emergency | 25500 |
| Est Cost Environmental | 63000 |
| Est Cost Other | 0 |
| Prpty | 89275 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 863 |
| Mop Psig | 1480 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2022-04-27 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 522720 |
| 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 | This event did not warrant an investigation of controller actions. |
| 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 |
| Additional Defect Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Failure Is Believed To Be Due To Poor Design Of The Components. |
| Preparer Name | D***** B**** |
| Preparer Title | Pipeline Regulatory Manager |
| Preparer Email | D***********@h*********.com |
| Preparer Telephone | 9727955457 |
| Prepared Date | 2024-09-13 00:00:00 |
| Authorizer Name | D***** B**** |
| Authorizer Telephone | 9727955457 |
| Authorizer Title | Pipeline Regulatory Manager |
| Authorizer Email | D***********@h*********.com |
| Narrative | On august 21, 2023, at approximately 8:30 a.M. Mst, local operating personnel arrived onsite to perform work at the lynndyl valve station along the unev pipeline system. Upon arriving, they observed soil staining that had extended a few feet beyond the station's fence line. Personnel immediately informed their supervisor and the hep control center, then proceeded to manually excavate the saturated soil to identify the source of the release. By approximately 4:00 p.M. Mst, personnel had completed the excavation, reaching a depth of approximately 12 inches, an additional 4 inches beyond the stained soil area. They then conducted spill calculations for the affected area, estimating a release of approximately 2 barrels of mixed refined product (diesel and gasoline). At this time, personnel also were able to confirm that there was no ongoing leak. After reaching this determination and consulting with area supervision, personnel believed that the saturated soil may have been due to a prior non-reportable release at the lynndyl station on july 10, 2023. This incident was a result of a failure of a "puck-style" block coming off of the pressure transmitter on the mainline. This release generated a fine mist, which settled on rocks and soil within the station's fence line. At the time of the july 10 release, personnel estimated a volume of no more than 2 gallons, leading to internal notifications and an event entry into hep's incident management system. Following this event, and over the period of july 10 to august 21, the area experienced significant rainfall. During these weather events, personnel periodically inspected this, and other area sites, for signs of any new issues arising from the weather. No evidence of any new releases were discovered at this site. In response to the release volume of approximately 2 barrels on august 21, notifications were made to the national response center (nrc) and the utah department of environmental quality (udeq). It's worth noting that, although the initial nrc report indicates a timestamp of 16:04, there was an approximate half-hour delay before the call was actually answered. As of this report, the apparent cause of the initial, non-reportable release on july 10 is believed to be the failure of the "puck-style" block off of the pressure transmitter. Operating personnel have confirmed, by the manufacturer, the correct installation of the transmitter and all connecting equipment, leading them to presume that the failure was due to a flawed design. Presently, the failed pressure transmitter (manufactured by rosemount) and the "puck-style" block has been replaced with a honeywell-manufactured pressure transmitter. Update 9/13/2024 - hf sinclair midstream contracted trc to conduct site remediation efforts. In collaboration with the utah department of environmental quality (udeq), trc developed a comprehensive remediation plan. The plan was submitted to udeq on august 12, 2024, and subsequently approved on august 28. Hf sinclair midstream is currently awaiting a revised proposal from trc, with remediation work scheduled to begin in the coming months. |
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