Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2020-10-02 — TX
Operator
Nustar Logistics, L.p.
Cause
Corrosion Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$1,212,905
Incident datetime
2020-10-02 21:35
Report number
Location
TX
Narrative
Nustar operating personnel discovered a crude oil release originating underneath the floor of tank 400m-1, inside nustar's corpus christi north beach crude terminal. The crude oil in the tank has been evacuated. The tank will be cleaned, and the failed portion of the tank will be examined. The cause of the leak is under investigation. Update: the cause of the failure is external corrosion of the tank floor. Through-wall corrosion pits were observed on the interior floor plates of the tank. Selected through-wall features have been removed for laboratory analysis to determine the cause of corrosion. The tank floor has been scanned. All the interior floor plates, as well as four annular plates, will be removed and replaced. In addition, the material and external liner underneath the tank will be replaced. A new internal liner will also be installed prior to returning the tank to service. The cause of the failure remains under investigation. Update: two corrosion mechanisms caused failures. One sample failed due to concentration cell corrosion promoted by mixed under-bottom fill and chlorides. Two other samples failed due to general corrosion promoted by chlorides.
Detailed record list
Report Received Date
2020-10-30 00:00:00
Iyear
2020
Report Number
20200294
Supplemental Number
34846
Report Type
Supplemental Final
Operator Id
31454
Name
Nustar Logistics, L.p.
Operator Street Address
8111 Westchester Drive
Operator City Name
Dallas
Operator State Abbreviation
TX
Operator Postal Code
75225
Local Datetime
2020-10-02 21:35:00
Location Latitude
27.8179
Location Longitude
-97.40653
Commodity Released Type
Crude Oil
Unintentional Release Bbls
0.36
Recovered Bbls
0.36
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2020-10-02 21:35:00
System Part Involved
Onshore Breakout Tank Or Storage Vessel, Including Attached Appurtenances
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Crude Oil Transferred From Tank 400m-1
On Site Datetime
2020-10-02 21:35:00
Nrc Rpt Datetime
2020-10-02 22:11:00
Nrc Rpt Num
1288916
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
45p Oakville Pipeline System
Segment Name
Corpus Christi North Beach Crude Oil Terminal
Onshore State Abbreviation
Tx
Onshore Postal Code
78402
Onshore City Name
Not Within A Municipality
Onshore County Name
Nueces
Designated Location
Survey Station No.
Designated Name
0+00
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Tank, Including Attached Appurtenances
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Tank/vessel
Tank Vessel Subtype
Single Bottom System
Tank Type
Atmospheric
Api Std Out Of Service Year
2012
Api Std In Service Year
2017
Installation Year
1995
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
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
Yes
High Pop Ind
Yes
High Pop Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
13
Est Cost Prop Damage
1212905
Est Cost Emergency
0
Est Cost Environmental
318005
Est Cost Other
7188
Est Cost Other Details
Laboratory Analysis
Prpty
1538111
Accident Psig
4
Mop Psig
16.8
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction 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
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
Neither controller action nor control room issues contributed to the accident. See parts g and h of this report
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
General Corrosion
Other Corrosion Ind
Yes
Corrosion Type Details
Concentration Cell Corrosion, General Corrosion
Field Exam Basis Ind
Yes
Metallurgical Basis Ind
Yes
Underground Location
No
Externally Coated
No
Prior Damage
No
Preparer Name
R****** P****
Preparer Title
Pipeline Safety Supervisor
Preparer Email
R************@n***********.com
Preparer Telephone
3612499417
Preparer Fax
2109187117
Prepared Date
2021-02-11 00:00:00
Authorizer Name
W** G***
Authorizer Telephone
3612499402
Authorizer Title
Vice President And General Manager
Authorizer Email
W*******@n***********.com
Narrative
Nustar operating personnel discovered a crude oil release originating underneath the floor of tank 400m-1, inside nustar's corpus christi north beach crude terminal. The crude oil in the tank has been evacuated. The tank will be cleaned, and the failed portion of the tank will be examined. The cause of the leak is under investigation. Update: the cause of the failure is external corrosion of the tank floor. Through-wall corrosion pits were observed on the interior floor plates of the tank. Selected through-wall features have been removed for laboratory analysis to determine the cause of corrosion. The tank floor has been scanned. All the interior floor plates, as well as four annular plates, will be removed and replaced. In addition, the material and external liner underneath the tank will be replaced. A new internal liner will also be installed prior to returning the tank to service. The cause of the failure remains under investigation. Update: two corrosion mechanisms caused failures. One sample failed due to concentration cell corrosion promoted by mixed under-bottom fill and chlorides. Two other samples failed due to general corrosion promoted by chlorides.
| Report Received Date | 2020-10-30 00:00:00 |
|---|---|
| Iyear | 2020 |
| Report Number | 20200294 |
| Supplemental Number | 34846 |
| Report Type | Supplemental Final |
| Operator Id | 31454 PHMSA Enforcement |
| Name | Nustar Logistics, L.p. |
| Operator Street Address | 8111 Westchester Drive |
| Operator City Name | Dallas |
| Operator State Abbreviation | TX |
| Operator Postal Code | 75225 |
| Local Datetime | 2020-10-02 21:35:00 |
| Location Latitude | 27.8179 Google Maps OpenStreetMap |
| Location Longitude | -97.40653 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 0.36 |
| Recovered Bbls | 0.36 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2020-10-02 21:35:00 |
| System Part Involved | Onshore Breakout Tank Or Storage Vessel, Including Attached Appurtenances |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Crude Oil Transferred From Tank 400m-1 |
| On Site Datetime | 2020-10-02 21:35:00 |
| Nrc Rpt Datetime | 2020-10-02 22:11:00 |
| Nrc Rpt Num | 1288916 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | 45p Oakville Pipeline System |
| Segment Name | Corpus Christi North Beach Crude Oil Terminal |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 78402 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Nueces |
| Designated Location | Survey Station No. |
| Designated Name | 0+00 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Tank, Including Attached Appurtenances |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Tank/vessel |
| Tank Vessel Subtype | Single Bottom System |
| Tank Type | Atmospheric |
| Api Std Out Of Service Year | 2012 |
| Api Std In Service Year | 2017 |
| Installation Year | 1995 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| 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 | Yes |
| High Pop Ind | Yes |
| High Pop Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 13 |
| Est Cost Prop Damage | 1212905 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 318005 |
| Est Cost Other | 7188 |
| Est Cost Other Details | Laboratory Analysis |
| Prpty | 1538111 |
| Accident Psig | 4 |
| Mop Psig | 16.8 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction 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 | 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 | Neither controller action nor control room issues contributed to the accident. See parts g and h of this report |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | General Corrosion |
| Other Corrosion Ind | Yes |
| Corrosion Type Details | Concentration Cell Corrosion, General Corrosion |
| Field Exam Basis Ind | Yes |
| Metallurgical Basis Ind | Yes |
| Underground Location | No |
| Externally Coated | No |
| Prior Damage | No |
| Preparer Name | R****** P**** |
| Preparer Title | Pipeline Safety Supervisor |
| Preparer Email | R************@n***********.com |
| Preparer Telephone | 3612499417 |
| Preparer Fax | 2109187117 |
| Prepared Date | 2021-02-11 00:00:00 |
| Authorizer Name | W** G*** |
| Authorizer Telephone | 3612499402 |
| Authorizer Title | Vice President And General Manager |
| Authorizer Email | W*******@n***********.com |
| Narrative | Nustar operating personnel discovered a crude oil release originating underneath the floor of tank 400m-1, inside nustar's corpus christi north beach crude terminal. The crude oil in the tank has been evacuated. The tank will be cleaned, and the failed portion of the tank will be examined. The cause of the leak is under investigation. Update: the cause of the failure is external corrosion of the tank floor. Through-wall corrosion pits were observed on the interior floor plates of the tank. Selected through-wall features have been removed for laboratory analysis to determine the cause of corrosion. The tank floor has been scanned. All the interior floor plates, as well as four annular plates, will be removed and replaced. In addition, the material and external liner underneath the tank will be replaced. A new internal liner will also be installed prior to returning the tank to service. The cause of the failure remains under investigation. Update: two corrosion mechanisms caused failures. One sample failed due to concentration cell corrosion promoted by mixed under-bottom fill and chlorides. Two other samples failed due to general corrosion promoted by chlorides. |
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