Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-09-16 — ND
Operator
Dakota Gasification Company
Cause
Equipment Failure
Commodity
Co2 (Carbon Dioxide)
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$19,546
Incident datetime
2023-09-16 00:00 UTC
Report number
Location
ND
Narrative
Dgc became aware of log entry that stated h2s levels at the tioga station. Reviewed the current status of the tioga station on process explorer and noted that both fixed h2s monitors near ga7411 were pegged out at 100 ppm. Viewed live camera imagery via arlo camera facing the pump, could visually see a leak coming from ga7411 seal area. Dispatched a pipeline ops crew and protection services technician to the site to observe and air monitor the area. No h2s was detected outside the tioga pump house. Pipeline ops checked isolation valves and added valve sealant to both valves. Started the flare and attempted to de-pressure the seal system to the flare. Several attempts of going to the flare were unsuccessful, this indicating a total seal failure. The building was ventilated of h2s to a level below 1 ppm. Pipeline ops left for the evening; the building was closed up to prevent h2s from leaving the site. Protection services tech monitored the area outside of the station and down the road to keep people away from the site until relieved at 7 am by pipeline ops staff the next morning. The pump was blinded from the process and flushed with diesel fuel to remove the remaining product.
Detailed record list
Report Received Date
2023-09-16 00:00:00
Iyear
2023
Report Number
20230217
Supplemental Number
40352
Report Type
Supplemental Final
Operator Id
Name
Dakota Gasification Company
Operator Street Address
1717 East Interstate Avenue
Operator City Name
Bismarck
Operator State Abbreviation
ND
Operator Postal Code
58503-0564
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
48.397493
Location Longitude
-102.901502
Commodity Released Type
Co2 (Carbon Dioxide)
Unintentional Release Bbls
230
Intentional Release Bbls
178
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 Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Status When Identified
Idle
Communication State Fed Ind
No
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Dgc Tioga Pump Station
Segment Name
Ga7411
Onshore State Abbreviation
Nd
Onshore Postal Code
58852
Onshore City Name
Tioga
Onshore County Name
Williams
Designated Location
Milepost
Designated Name
118
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Inside A Building
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pump
Pump Type
Centrifugal
Pump Service Type
Mainline
Installation Year
2023
Manufactured Year
Unknown
Material Involved
Material Other Than Carbon Steel
Material Details
Stainless Steel
Release Type
Leak
Leak Type
Seal Or Packing
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
5605
Est Cost Prop Damage
19546
Est Cost Emergency
1000
Est Cost Environmental
0
Est Cost Other
0
Prpty
26151
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
2215
Mop Psig
2964
Mop Cfr Section
Internal Design Pressure �195.406(A)(1)
Maop Established Date
2005-09-14 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
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
Investigation Status
Yes, but the investigation of the control room and/or controller actions has not yet been completed by the operator (supplemental report required)
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Pump Or Pump-Related Equipment
Eq Failure Type
Pump Or Pump-Related Equipment
Other Pump Ind
Seal/packing Failure
Eq Additional Other Ind
Yes
Eq Additional Other Details
Tbd
Eqf Pump Equipment Ind
Yes
Preparer Name
C**** B******
Preparer Title
Compliance Program Supervisor
Preparer Email
C*******@b***.com
Prepared Date
2024-12-23 00:00:00
Authorizer Name
C**** B******
Authorizer Telephone
701-873-6135
Authorizer Title
Compliance Program Supervisor
Authorizer Email
C*******@b***.com
Narrative
Dgc became aware of log entry that stated h2s levels at the tioga station. Reviewed the current status of the tioga station on process explorer and noted that both fixed h2s monitors near ga7411 were pegged out at 100 ppm. Viewed live camera imagery via arlo camera facing the pump, could visually see a leak coming from ga7411 seal area. Dispatched a pipeline ops crew and protection services technician to the site to observe and air monitor the area. No h2s was detected outside the tioga pump house. Pipeline ops checked isolation valves and added valve sealant to both valves. Started the flare and attempted to de-pressure the seal system to the flare. Several attempts of going to the flare were unsuccessful, this indicating a total seal failure. The building was ventilated of h2s to a level below 1 ppm. Pipeline ops left for the evening; the building was closed up to prevent h2s from leaving the site. Protection services tech monitored the area outside of the station and down the road to keep people away from the site until relieved at 7 am by pipeline ops staff the next morning. The pump was blinded from the process and flushed with diesel fuel to remove the remaining product.
| Report Received Date | 2023-09-16 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230217 |
| Supplemental Number | 40352 |
| Report Type | Supplemental Final |
| Operator Id | 515 PHMSA Enforcement |
| Name | Dakota Gasification Company |
| Operator Street Address | 1717 East Interstate Avenue |
| Operator City Name | Bismarck |
| Operator State Abbreviation | ND |
| Operator Postal Code | 58503-0564 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 48.397493 Google Maps OpenStreetMap |
| Location Longitude | -102.901502 Google Maps OpenStreetMap |
| Commodity Released Type | Co2 (Carbon Dioxide) |
| Unintentional Release Bbls | 230 |
| Intentional Release Bbls | 178 |
| 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 Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Idle |
| Communication State Fed Ind | No |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Dgc Tioga Pump Station |
| Segment Name | Ga7411 |
| Onshore State Abbreviation | Nd |
| Onshore Postal Code | 58852 |
| Onshore City Name | Tioga |
| Onshore County Name | Williams |
| Designated Location | Milepost |
| Designated Name | 118 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Inside A Building |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pump |
| Pump Type | Centrifugal |
| Pump Service Type | Mainline |
| Installation Year | 2023 |
| Manufactured Year | Unknown |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Stainless Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 5605 |
| Est Cost Prop Damage | 19546 |
| Est Cost Emergency | 1000 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 26151 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 2215 |
| Mop Psig | 2964 |
| Mop Cfr Section | Internal Design Pressure �195.406(A)(1) View CFR 49 §192 |
| Maop Established Date | 2005-09-14 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 | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| Investigation Status | Yes, but the investigation of the control room and/or controller actions has not yet been completed by the operator (supplemental report required) |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Pump Or Pump-Related Equipment |
| Eq Failure Type | Pump Or Pump-Related Equipment |
| Other Pump Ind | Seal/packing Failure |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Tbd |
| Eqf Pump Equipment Ind | Yes |
| Preparer Name | C**** B****** |
| Preparer Title | Compliance Program Supervisor |
| Preparer Email | C*******@b***.com |
| Prepared Date | 2024-12-23 00:00:00 |
| Authorizer Name | C**** B****** |
| Authorizer Telephone | 701-873-6135 |
| Authorizer Title | Compliance Program Supervisor |
| Authorizer Email | C*******@b***.com |
| Narrative | Dgc became aware of log entry that stated h2s levels at the tioga station. Reviewed the current status of the tioga station on process explorer and noted that both fixed h2s monitors near ga7411 were pegged out at 100 ppm. Viewed live camera imagery via arlo camera facing the pump, could visually see a leak coming from ga7411 seal area. Dispatched a pipeline ops crew and protection services technician to the site to observe and air monitor the area. No h2s was detected outside the tioga pump house. Pipeline ops checked isolation valves and added valve sealant to both valves. Started the flare and attempted to de-pressure the seal system to the flare. Several attempts of going to the flare were unsuccessful, this indicating a total seal failure. The building was ventilated of h2s to a level below 1 ppm. Pipeline ops left for the evening; the building was closed up to prevent h2s from leaving the site. Protection services tech monitored the area outside of the station and down the road to keep people away from the site until relieved at 7 am by pipeline ops staff the next morning. The pump was blinded from the process and flushed with diesel fuel to remove the remaining product. |
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