Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2020-11-24 — TX
Operator
Sfpp, Lp
Cause
Material Failure Of Pipe Or Weld
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)
$274,289
Incident datetime
2020-11-24 22:03
Report number
Location
TX
Narrative
On 11/20/20, the control room began to see the overs/shorts running negative on ls-16 from concord to san jose. The line was shut down at 1551 in order to investigate and conduct several static pressure tests. At 1920 it was determined that a section of the line between concord station and the hillgrade block valve was unable to hold adequate pressure, and a threatened release notification was made to oes/nrc. The line was patrolled during this time by ground-based right-of-way patrols which could not find any indication of a release between concord and the hillgrade block valve. The ground patrol also included sniffing at known stopple locations for the presence of petroleum vapors. With no physical indications of a release or any petroleum odors/vapors observed along the right-of-way, the initial investigations pointed to pressure bleeding back into concord station and product temperature changes as the source of the pressure drop between concord station and the hillgrade block valve. On the morning of 11/23, an additional test was conducted to confirm product temperature changes as the source of the pressure drop in the line. This confirmation test failed. Subsequently, the line was purged with nitrogen and a tracer gas at 1500 on 11/24 in an attempt to pinpoint any would-be leak location. The leak was discovered at 2203 by ground patrols, and crews arrived and began excavating the line where the release was discovered. Release confirmation was made to oes/nrc at this time. Upon excavation, a 5.5 inch crack in the line was discovered and the line section was cut out and shipped to a metallurgical lab for further analysis. A replacement section was welded into place on 11/25 and the line was refilled and placed back into service on the morning of 11/26. The official cause of what caused the crack will be pending after further metallurgical analysis. On 12/2 an odor complaint of gasoline was reported at approximately milepost 7.5 along the iron horse trail adjacent to a storm channel in walnut creek. After shutting down the line, running another nitrogen purge with tracer gas and conducting extensive testing and investigation, it was determined that there was not a 2nd release and that the product had migrated to the location upstream from the original release location that occurred on 11/20. Update 1/13/2021- the metallurgical analysis concluded that the crack that formed at a field bend likely occurred due to high ph stress corrosion cracking. Long term remediation is taking place under the auspices of state and local agencies.
Detailed record list
Report Received Date
2020-12-18 00:00:00
Iyear
2020
Report Number
20200333
Supplemental Number
34727
Report Type
Supplemental Final
Operator Id
18092
Name
Sfpp, Lp
Operator Street Address
1001 Louisiana St., Suite 1000
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2020-11-20 03:00:00
Location Latitude
37.88652
Location Longitude
-122.050951
Commodity Released Type
Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions
Commodity Subtype
Gasoline (Non-Ethanol)
Unintentional Release Bbls
1000
Recovered Bbls
70.1
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Ground Patrol By Operator Or Its Contractor
Operator Type
Operator Employee
Incident Identified Datetime
2020-11-24 22:03:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2020-11-20 15:51:00
Restart Datetime
2020-11-26 10:43:00
On Site Datetime
2020-11-24 22:03:00
Nrc Rpt Datetime
2020-11-20 19:20:00
Nrc Rpt Num
1292755
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Remotely Controlled
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Ls-16
Segment Name
Concord To San Jose
Onshore State Abbreviation
Ca
Onshore Postal Code
94596
Onshore City Name
Walnut Creek
Onshore County Name
Contra Costa
Designated Location
Milepost/valve Station
Designated Name
8.55
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
60
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
10.75
Pipe Wall Thickness
0.25
Pipe Smys
42000
Pipe Specification
Api 5l
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Extruded Polyehylene
Installation Year
1988
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Crack
Wildlife Impact Ind
Yes
Terrestrial Impact Ind
Yes
Soil Contamination
Yes
Long Term Assessment
Yes
Remediation Ind
Yes
Groundwater Remed Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
Yes
Groundwater Contam Ind
Yes
Amount Released
1000
Rel Water Name
Unknown
Could Be Hca
Yes
Commodity Reached Hca
Yes
High Pop Ind
Yes
High Pop Yes No
Yes
Usa Drinking Ind
Yes
Usa Drinking Yes No
Yes
Usa Ecological Ind
Yes
Usa Ecological Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
55977
Est Cost Prop Damage
274289
Est Cost Emergency
1324898
Est Cost Environmental
4000000
Est Cost Other
4000
Est Cost Other Details
Costs Associated To Temporarily Relocate Residents Due To Ongoing Noise Nuisance
Prpty
5659164
Accident Psig
750
Mop Psig
1309
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
53328
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
No
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest Schedule Ind
Yes
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Environmental Cracking-Related
Field Exam Ind
Yes
Metallurgical Ind
Yes
Failure Type
Environmental Cracking-Related
Stress Subtype
Stress Corrosion Cracking
Additional Pipe Bend Ind
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2019
Geometry Recent Year
2019
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
W*** S******
Preparer Title
Pipeline Technical Specialist
Preparer Email
W***********@k***********.com
Preparer Telephone
661-304-6971
Prepared Date
2021-01-15 00:00:00
Authorizer Name
Q****** F******
Authorizer Telephone
770-751-4240
Authorizer Title
Manager-Compliance Codes And Standards
Authorizer Email
Q**************@k***********.com
Narrative
On 11/20/20, the control room began to see the overs/shorts running negative on ls-16 from concord to san jose. The line was shut down at 1551 in order to investigate and conduct several static pressure tests. At 1920 it was determined that a section of the line between concord station and the hillgrade block valve was unable to hold adequate pressure, and a threatened release notification was made to oes/nrc. The line was patrolled during this time by ground-based right-of-way patrols which could not find any indication of a release between concord and the hillgrade block valve. The ground patrol also included sniffing at known stopple locations for the presence of petroleum vapors. With no physical indications of a release or any petroleum odors/vapors observed along the right-of-way, the initial investigations pointed to pressure bleeding back into concord station and product temperature changes as the source of the pressure drop between concord station and the hillgrade block valve. On the morning of 11/23, an additional test was conducted to confirm product temperature changes as the source of the pressure drop in the line. This confirmation test failed. Subsequently, the line was purged with nitrogen and a tracer gas at 1500 on 11/24 in an attempt to pinpoint any would-be leak location. The leak was discovered at 2203 by ground patrols, and crews arrived and began excavating the line where the release was discovered. Release confirmation was made to oes/nrc at this time. Upon excavation, a 5.5 inch crack in the line was discovered and the line section was cut out and shipped to a metallurgical lab for further analysis. A replacement section was welded into place on 11/25 and the line was refilled and placed back into service on the morning of 11/26. The official cause of what caused the crack will be pending after further metallurgical analysis. On 12/2 an odor complaint of gasoline was reported at approximately milepost 7.5 along the iron horse trail adjacent to a storm channel in walnut creek. After shutting down the line, running another nitrogen purge with tracer gas and conducting extensive testing and investigation, it was determined that there was not a 2nd release and that the product had migrated to the location upstream from the original release location that occurred on 11/20. Update 1/13/2021- the metallurgical analysis concluded that the crack that formed at a field bend likely occurred due to high ph stress corrosion cracking. Long term remediation is taking place under the auspices of state and local agencies.
| Report Received Date | 2020-12-18 00:00:00 |
|---|---|
| Iyear | 2020 |
| Report Number | 20200333 |
| Supplemental Number | 34727 |
| Report Type | Supplemental Final |
| Operator Id | 18092 PHMSA Enforcement |
| Name | Sfpp, Lp |
| Operator Street Address | 1001 Louisiana St., Suite 1000 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2020-11-20 03:00:00 |
| Location Latitude | 37.88652 Google Maps OpenStreetMap |
| Location Longitude | -122.050951 Google Maps OpenStreetMap |
| Commodity Released Type | Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions |
| Commodity Subtype | Gasoline (Non-Ethanol) |
| Unintentional Release Bbls | 1000 |
| Recovered Bbls | 70.1 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Ground Patrol By Operator Or Its Contractor |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2020-11-24 22:03:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2020-11-20 15:51:00 |
| Restart Datetime | 2020-11-26 10:43:00 |
| On Site Datetime | 2020-11-24 22:03:00 |
| Nrc Rpt Datetime | 2020-11-20 19:20:00 |
| Nrc Rpt Num | 1292755 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Valve Type Ind | Manual |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Ls-16 |
| Segment Name | Concord To San Jose |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 94596 |
| Onshore City Name | Walnut Creek |
| Onshore County Name | Contra Costa |
| Designated Location | Milepost/valve Station |
| Designated Name | 8.55 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 60 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 10.75 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 42000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Extruded Polyehylene |
| Installation Year | 1988 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Wildlife Impact Ind | Yes |
| Terrestrial Impact Ind | Yes |
| Soil Contamination | Yes |
| Long Term Assessment | Yes |
| Remediation Ind | Yes |
| Groundwater Remed Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | Yes |
| Groundwater Contam Ind | Yes |
| Amount Released | 1000 |
| Rel Water Name | Unknown |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| High Pop Ind | Yes |
| High Pop Yes No | Yes |
| Usa Drinking Ind | Yes |
| Usa Drinking Yes No | Yes |
| Usa Ecological Ind | Yes |
| Usa Ecological Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 55977 |
| Est Cost Prop Damage | 274289 |
| Est Cost Emergency | 1324898 |
| Est Cost Environmental | 4000000 |
| Est Cost Other | 4000 |
| Est Cost Other Details | Costs Associated To Temporarily Relocate Residents Due To Ongoing Noise Nuisance |
| Prpty | 5659164 |
| Accident Psig | 750 |
| Mop Psig | 1309 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 53328 |
| 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 | No |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest Schedule Ind | Yes |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Environmental Cracking-Related |
| Field Exam Ind | Yes |
| Metallurgical Ind | Yes |
| Failure Type | Environmental Cracking-Related |
| Stress Subtype | Stress Corrosion Cracking |
| Additional Pipe Bend Ind | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2019 |
| Geometry Recent Year | 2019 |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | W*** S****** |
| Preparer Title | Pipeline Technical Specialist |
| Preparer Email | W***********@k***********.com |
| Preparer Telephone | 661-304-6971 |
| Prepared Date | 2021-01-15 00:00:00 |
| Authorizer Name | Q****** F****** |
| Authorizer Telephone | 770-751-4240 |
| Authorizer Title | Manager-Compliance Codes And Standards |
| Authorizer Email | Q**************@k***********.com |
| Narrative | On 11/20/20, the control room began to see the overs/shorts running negative on ls-16 from concord to san jose. The line was shut down at 1551 in order to investigate and conduct several static pressure tests. At 1920 it was determined that a section of the line between concord station and the hillgrade block valve was unable to hold adequate pressure, and a threatened release notification was made to oes/nrc. The line was patrolled during this time by ground-based right-of-way patrols which could not find any indication of a release between concord and the hillgrade block valve. The ground patrol also included sniffing at known stopple locations for the presence of petroleum vapors. With no physical indications of a release or any petroleum odors/vapors observed along the right-of-way, the initial investigations pointed to pressure bleeding back into concord station and product temperature changes as the source of the pressure drop between concord station and the hillgrade block valve. On the morning of 11/23, an additional test was conducted to confirm product temperature changes as the source of the pressure drop in the line. This confirmation test failed. Subsequently, the line was purged with nitrogen and a tracer gas at 1500 on 11/24 in an attempt to pinpoint any would-be leak location. The leak was discovered at 2203 by ground patrols, and crews arrived and began excavating the line where the release was discovered. Release confirmation was made to oes/nrc at this time. Upon excavation, a 5.5 inch crack in the line was discovered and the line section was cut out and shipped to a metallurgical lab for further analysis. A replacement section was welded into place on 11/25 and the line was refilled and placed back into service on the morning of 11/26. The official cause of what caused the crack will be pending after further metallurgical analysis. On 12/2 an odor complaint of gasoline was reported at approximately milepost 7.5 along the iron horse trail adjacent to a storm channel in walnut creek. After shutting down the line, running another nitrogen purge with tracer gas and conducting extensive testing and investigation, it was determined that there was not a 2nd release and that the product had migrated to the location upstream from the original release location that occurred on 11/20. Update 1/13/2021- the metallurgical analysis concluded that the crack that formed at a field bend likely occurred due to high ph stress corrosion cracking. Long term remediation is taking place under the auspices of state and local agencies. |
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