Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2024-12-11 — TX
Operator
Boardwalk Louisiana Midstream, Llc
Cause
Other Outside Force Damage
Commodity
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$48,680
Incident datetime
2024-12-11 00:00 UTC
Report number
Location
TX
Narrative
On 11/27/2024 at approximately 02:30, boardwalk louisiana midstream's (blm) control center received scada alarms at ashland road rsd site for high lel and low pressure on the downstream transmitter; operations personnel were dispatched to investigate. When operations personnel arrived, first responders were onsite responding to a vehicle accident in which the vehicle struck the valve site and caused the ethylene leak. Operations personnel discovered ethylene venting into the air with the wind blowing ethylene across ashland road. Operations personnel requested the control center close the upstream main line valve. Once inside the fenced area, operations personnel determined that tubing was damaged by the vehicle and they were able to isolate a 1/2-inch ball valve going to the tubing. Once the ball valve was closed, the ethylene leak stopped within approximately 2 minutes. At approximately 04:45, the site was deemed safe to reopen the mainline valve and control center personnel did so. Operations personnel repaired the damaged tubing and adjusted the pressure transmitter and the facility was returned to service.
Detailed record list
Report Received Date
2024-12-11 00:00:00
Iyear
2024
Report Number
20240287
Supplemental Number
40308
Report Type
Original Final
Operator Id
39138
Name
Boardwalk Louisiana Midstream, Llc
Operator Street Address
9 Greenway Plaza
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77046
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
30.18478
Location Longitude
-90.98617
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Other Hvl
Commodity Details
Ethylene
Unintentional Release Bbls
99
Intentional Release Bbls
0
Recovered Bbls
0
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)
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
No
Shutdown Explain
Closed Upstream Mainline Valve But Did Not Shut Down Pipeline.
Communication State Fed Ind
Yes
Party Initiated Communication
Local/state/federal Emergency Responder
Nrc Rpt Num
1417472
Additional Nrc Report Numbers
1417573
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Type Ind
Remotely Controlled
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
No Downstream Action Was Required.
Num Pub Evacuated
0
Pipe Fac Name
Ashland Road Valve Site
Segment Name
Blm-705
Onshore State Abbreviation
La
Onshore Postal Code
70725
Onshore City Name
Geismar
Onshore County Name
Ascension
Designated Location
Survey Station No.
Designated Name
308+55
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
Intrastate
Item Involved
Tubing
Tubing Material
Stainless Steel
Tubing Type
Rigid
Installation Year
1979
Manufactured Year
1979
Material Involved
Material Other Than Carbon Steel
Material Details
Stainless Steel Tubing
Release Type
Leak
Leak Type
Connection Failure
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
Yes
High Pop Ind
Yes
High Pop Yes No
No
Est Cost Oper Paid
0
Est Cost Gas Released
2787
Est Cost Prop Damage
48680
Est Cost Emergency
992
Est Cost Environmental
0
Est Cost Other
0
Prpty
52459
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
1178
Mop Psig
1440
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
1978-04-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
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
Yes
Cpm In Place Ind
No
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Outside Force Damage
Cause Details
Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation
Outside Force Type
Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation
Vehicle Subtype
Third Party
Driver Issued Citation Ind
Yes
Citation Dui Ind
Yes
Citation Other Ind
Yes
Citation Other Detail
Careless Operation
Driver In Control Ind
Yes
Estimated Speed Unknown Ind
Yes
Vehicle Type
Passenger Car
Vehicle Travel From
Roadway
Vehicle Travel Distance Ft
80
Protections Installed Ind
Yes
Protection Barricades Ind
Yes
Preparer Name
S****** M********
Preparer Title
Compliance Program Leader
Preparer Email
S****************@b**********.com
Preparer Telephone
2709035764
Prepared Date
2024-12-11 00:00:00
Authorizer Name
T*** B****
Authorizer Telephone
2703146546
Authorizer Title
Manager Compliance Services
Authorizer Email
T*********@b**********.com
Narrative
On 11/27/2024 at approximately 02:30, boardwalk louisiana midstream's (blm) control center received scada alarms at ashland road rsd site for high lel and low pressure on the downstream transmitter; operations personnel were dispatched to investigate. When operations personnel arrived, first responders were onsite responding to a vehicle accident in which the vehicle struck the valve site and caused the ethylene leak. Operations personnel discovered ethylene venting into the air with the wind blowing ethylene across ashland road. Operations personnel requested the control center close the upstream main line valve. Once inside the fenced area, operations personnel determined that tubing was damaged by the vehicle and they were able to isolate a 1/2-inch ball valve going to the tubing. Once the ball valve was closed, the ethylene leak stopped within approximately 2 minutes. At approximately 04:45, the site was deemed safe to reopen the mainline valve and control center personnel did so. Operations personnel repaired the damaged tubing and adjusted the pressure transmitter and the facility was returned to service.
| Report Received Date | 2024-12-11 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240287 |
| Supplemental Number | 40308 |
| Report Type | Original Final |
| Operator Id | 39138 PHMSA Enforcement |
| Name | Boardwalk Louisiana Midstream, Llc |
| Operator Street Address | 9 Greenway Plaza |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77046 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 30.18478 Google Maps OpenStreetMap |
| Location Longitude | -90.98617 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Other Hvl |
| Commodity Details | Ethylene |
| Unintentional Release Bbls | 99 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| 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) |
| 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 | No |
| Shutdown Explain | Closed Upstream Mainline Valve But Did Not Shut Down Pipeline. |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Local/state/federal Emergency Responder |
| Nrc Rpt Num | 1417472 NRC Report How to search |
| Additional Nrc Report Numbers | 1417573 |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | No Downstream Action Was Required. |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Ashland Road Valve Site |
| Segment Name | Blm-705 |
| Onshore State Abbreviation | La |
| Onshore Postal Code | 70725 |
| Onshore City Name | Geismar |
| Onshore County Name | Ascension |
| Designated Location | Survey Station No. |
| Designated Name | 308+55 |
| 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 | Intrastate |
| Item Involved | Tubing |
| Tubing Material | Stainless Steel |
| Tubing Type | Rigid |
| Installation Year | 1979 |
| Manufactured Year | 1979 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Stainless Steel Tubing |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | Yes |
| High Pop Ind | Yes |
| High Pop Yes No | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 2787 |
| Est Cost Prop Damage | 48680 |
| Est Cost Emergency | 992 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 52459 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 1178 |
| Mop Psig | 1440 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 1978-04-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| 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 | Yes |
| Cpm In Place Ind | No |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Outside Force Damage |
| Cause Details | Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation |
| Outside Force Type | Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation |
| Vehicle Subtype | Third Party |
| Driver Issued Citation Ind | Yes |
| Citation Dui Ind | Yes |
| Citation Other Ind | Yes |
| Citation Other Detail | Careless Operation |
| Driver In Control Ind | Yes |
| Estimated Speed Unknown Ind | Yes |
| Vehicle Type | Passenger Car |
| Vehicle Travel From | Roadway |
| Vehicle Travel Distance Ft | 80 |
| Protections Installed Ind | Yes |
| Protection Barricades Ind | Yes |
| Preparer Name | S****** M******** |
| Preparer Title | Compliance Program Leader |
| Preparer Email | S****************@b**********.com |
| Preparer Telephone | 2709035764 |
| Prepared Date | 2024-12-11 00:00:00 |
| Authorizer Name | T*** B**** |
| Authorizer Telephone | 2703146546 |
| Authorizer Title | Manager Compliance Services |
| Authorizer Email | T*********@b**********.com |
| Narrative | On 11/27/2024 at approximately 02:30, boardwalk louisiana midstream's (blm) control center received scada alarms at ashland road rsd site for high lel and low pressure on the downstream transmitter; operations personnel were dispatched to investigate. When operations personnel arrived, first responders were onsite responding to a vehicle accident in which the vehicle struck the valve site and caused the ethylene leak. Operations personnel discovered ethylene venting into the air with the wind blowing ethylene across ashland road. Operations personnel requested the control center close the upstream main line valve. Once inside the fenced area, operations personnel determined that tubing was damaged by the vehicle and they were able to isolate a 1/2-inch ball valve going to the tubing. Once the ball valve was closed, the ethylene leak stopped within approximately 2 minutes. At approximately 04:45, the site was deemed safe to reopen the mainline valve and control center personnel did so. Operations personnel repaired the damaged tubing and adjusted the pressure transmitter and the facility was returned to service. |
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