Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2025-04-22 — TX
Operator
Exxonmobil Pipeline Company Llc
Cause
Corrosion Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$158,000
Incident datetime
2025-04-22 00:00 UTC
Report number
Location
TX
Narrative
Incident summary: on monday, march 24, 2025, the station operator arrived on site at 06:15 and identified the leak. The first notification call was made at 06:21. The station was put on bypass at 06:52, isolating the station from tank headers and shutting down facility booster pumps. Vacuum trucks arrived onsite mid-morning and began removing pooling oil. Hydro excavation to identify leak source began at 13:34. On tuesday, march 25, 2025, at 04:15, the source of the leak was identified (pinhole in 4" tee on drain line system) through hydro excavation and secondary containment was placed under the leaking 4-inch tee. Exact identification of leak source led to discovery of a valve leaking by into the drain system. Isolation upstream from this valve stopped the active leak midday on march 25th. Investigation root cause: under-deposit corrosion - area of chloride settlement due to water dropout created an environment for localized corrosion contributing factor: 4" scraper trap drain valve leaked by allowing abnormal flow to the drain system (pig brushes found in valve body) preventing re-occurrence: will replace the failed component and the drain system will be hydrotested. **updated the apparent cause, costs, and narrative. **
Detailed record list
Report Received Date
2025-04-22 00:00:00
Iyear
2025
Report Number
20250101
Supplemental Number
41077
Report Type
Supplemental
Operator Id
4906
Name
Exxonmobil Pipeline Company Llc
Operator Street Address
22777 Springwoods Village Parkway E2.2b-Emp
Operator City Name
Spring
Operator State Abbreviation
TX
Operator Postal Code
77389
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
28.933505
Location Longitude
-95.312348
Commodity Released Type
Crude Oil
Unintentional Release Bbls
167.37
Recovered Bbls
167.37
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
Quintana Station Isolated And Tx-2 Offshore System Bypassed Quintana
Communication State Fed Ind
No
Nrc Rpt Num
1426679
Additional Nrc Report Numbers
1426862
Ignite Ind
No
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
Yes
Osro Arrived On Site Dt
3/26/2025 6:00
Num Pub Evacuated
0
Pipe Fac Name
Quintana Station
Segment Name
Quintana Station
Onshore State Abbreviation
Tx
Onshore Postal Code
77541
Onshore City Name
Not Within A Municipality
Onshore County Name
Brazoria
Designated Location
Milepost
Designated Name
0
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
96
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Drain Lines
Installation Year
1998
Manufactured Year
Unknown
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
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
1080
Est Cost Prop Damage
158000
Est Cost Emergency
298947
Est Cost Environmental
100000
Est Cost Other
0
Prpty
558027
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
20
Mop Psig
285
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
1998-10-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Pipeline Function
< 20% Smys Regulated Transmission
Scada In Place 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
The accident occurred on a drain line system. This drain line system is not remotely monitored by the operations control center.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Localized Pitting
Int Corrosive Commodity Ind
Yes
Int Water Acid Ind
Yes
Int Field Exam Basis Ind
Yes
Int Metallurgical Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Int Elbow Loc Ind
Yes
Corrosion Inhibitors
Yes
Corrosion Lining
No
Cleaning Dewatering
Not Applicable - Not Mainline Pipe
Corrosion Coupons
Not Applicable - Not Mainline Pipe
Preparer Name
C****** D****
Preparer Title
Dot Advisor
Preparer Email
C**************@e*********.com
Preparer Telephone
214-557-4958
Prepared Date
2025-06-23 00:00:00
Authorizer Name
L**** B******
Authorizer Telephone
346-474-9151
Authorizer Title
Regulatory Compliance Supervisor
Authorizer Email
L**************@e*********.com
Narrative
Incident summary: on monday, march 24, 2025, the station operator arrived on site at 06:15 and identified the leak. The first notification call was made at 06:21. The station was put on bypass at 06:52, isolating the station from tank headers and shutting down facility booster pumps. Vacuum trucks arrived onsite mid-morning and began removing pooling oil. Hydro excavation to identify leak source began at 13:34. On tuesday, march 25, 2025, at 04:15, the source of the leak was identified (pinhole in 4" tee on drain line system) through hydro excavation and secondary containment was placed under the leaking 4-inch tee. Exact identification of leak source led to discovery of a valve leaking by into the drain system. Isolation upstream from this valve stopped the active leak midday on march 25th. Investigation root cause: under-deposit corrosion - area of chloride settlement due to water dropout created an environment for localized corrosion contributing factor: 4" scraper trap drain valve leaked by allowing abnormal flow to the drain system (pig brushes found in valve body) preventing re-occurrence: will replace the failed component and the drain system will be hydrotested. **updated the apparent cause, costs, and narrative. **
| Report Received Date | 2025-04-22 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250101 |
| Supplemental Number | 41077 |
| Report Type | Supplemental |
| Operator Id | 4906 PHMSA Enforcement |
| Name | Exxonmobil Pipeline Company Llc |
| Operator Street Address | 22777 Springwoods Village Parkway E2.2b-Emp |
| Operator City Name | Spring |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77389 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 28.933505 Google Maps OpenStreetMap |
| Location Longitude | -95.312348 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 167.37 |
| Recovered Bbls | 167.37 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Quintana Station Isolated And Tx-2 Offshore System Bypassed Quintana |
| Communication State Fed Ind | No |
| Nrc Rpt Num | 1426679 NRC Report How to search |
| Additional Nrc Report Numbers | 1426862 |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | Yes |
| Osro Arrived On Site Dt | 3/26/2025 6:00 |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Quintana Station |
| Segment Name | Quintana Station |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 77541 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Brazoria |
| Designated Location | Milepost |
| Designated Name | 0 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 96 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Drain Lines |
| Installation Year | 1998 |
| Manufactured Year | Unknown |
| 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 | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 1080 |
| Est Cost Prop Damage | 158000 |
| Est Cost Emergency | 298947 |
| Est Cost Environmental | 100000 |
| Est Cost Other | 0 |
| Prpty | 558027 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 20 |
| Mop Psig | 285 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 1998-10-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Pipeline Function | < 20% Smys Regulated Transmission |
| Scada In Place 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 | The accident occurred on a drain line system. This drain line system is not remotely monitored by the operations control center. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Localized Pitting |
| Int Corrosive Commodity Ind | Yes |
| Int Water Acid Ind | Yes |
| Int Field Exam Basis Ind | Yes |
| Int Metallurgical Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Int Elbow Loc Ind | Yes |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | No |
| Cleaning Dewatering | Not Applicable - Not Mainline Pipe |
| Corrosion Coupons | Not Applicable - Not Mainline Pipe |
| Preparer Name | C****** D**** |
| Preparer Title | Dot Advisor |
| Preparer Email | C**************@e*********.com |
| Preparer Telephone | 214-557-4958 |
| Prepared Date | 2025-06-23 00:00:00 |
| Authorizer Name | L**** B****** |
| Authorizer Telephone | 346-474-9151 |
| Authorizer Title | Regulatory Compliance Supervisor |
| Authorizer Email | L**************@e*********.com |
| Narrative | Incident summary: on monday, march 24, 2025, the station operator arrived on site at 06:15 and identified the leak. The first notification call was made at 06:21. The station was put on bypass at 06:52, isolating the station from tank headers and shutting down facility booster pumps. Vacuum trucks arrived onsite mid-morning and began removing pooling oil. Hydro excavation to identify leak source began at 13:34. On tuesday, march 25, 2025, at 04:15, the source of the leak was identified (pinhole in 4" tee on drain line system) through hydro excavation and secondary containment was placed under the leaking 4-inch tee. Exact identification of leak source led to discovery of a valve leaking by into the drain system. Isolation upstream from this valve stopped the active leak midday on march 25th. Investigation root cause: under-deposit corrosion - area of chloride settlement due to water dropout created an environment for localized corrosion contributing factor: 4" scraper trap drain valve leaked by allowing abnormal flow to the drain system (pig brushes found in valve body) preventing re-occurrence: will replace the failed component and the drain system will be hydrotested. **updated the apparent cause, costs, and narrative. ** |
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