Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2019-08-23 — TN
Operator
Chattanooga Gas Co
Cause
Pipe, Weld, Or Joint Failure
Commodity
Natural Gas
Program
GD
Damage and Injuries
1 fatality
0 injuries
Property damage (nominal)
$300
Incident datetime
2019-08-23 07:14
Report number
Location
TN, HAMILTON
Narrative
Chattanooga gas company responded to a fire call at 411 hawkwood ct in hixson, tn on august 23, 2019 at 7:30 am. Bar hole testing over the 1/2-inch pe service that was conducted as part of the emergency response indicated gas readings at the building wall near the service riser. A subsequent pressure test of the service line did not hold pressure. Initial excavation of the facilities determined cause of leakage to be a leaking socket fusion on a transition fitting that transitioned the 1/2-inch pe service pipe to the 3/4-inch steel service riser. Further investigation revealed a crack in the body of the 1/2-inch pe service pipe to be the cause of leakage. The original report for this incident documented the apparent cause in part g as "g8 - other incident cause" as the cause of the leaking socket fusion at the time was still under investigation. As the above noted crack was found, the apparent cause in part g has been changed to "g5 - pipe, weld, or joint failure" - body of pipe - crack. The estimated volume of gas that was released from the time the incident was reported until the facilities were cut and capped (5hours - 1 minute) was 402.6 mcf. The gas was discharging through a broken 3/4" pipe at the meter set for approximately this time period. Total estimated volume and cost of gas released could not be determined as the length of time that facilities had been leaking could not be determined. The original telephonic report to the nrc indicated injury requiring inpatient hospitalization. This has been changed to fatality as the hospitalized person succumbed to the injuries sustained from the fire. Additional nrc report number 1256276 was created for the same event after a 48-hour supplemental call was placed with the nrc.
Detailed record list
Occurred At
2019-08-23 07:14:00
Year
2019
Report Received Date
2019-09-21 00:00:00
Iyear
2019.0
Report Number
20190106.0
Supplemental Number
34668.0
Report Type
Supplemental Final
Operator Id
2288
Name
Chattanooga Gas Co
Operator Street Address
10 Peachtree Place Ne
Operator City Name
Atlanta
Operator State Abbreviation
GA
Operator Postal Code
30309
Local Datetime
2019-08-23 07:05:00
Time Zone
Eastern
Daylight Savings Ind
No
Location Street Address
411 Hawkwood Ct
Location City Name
Hixson
Location County Name
Hamilton
Location State Abbreviation
TN
Location Postal Code
37343
Location Latitude
35.1817
Location Longitude
-85.2233
Flow Cont Squeeze Off Ind
Yes
Nrc Rpt Datetime
2019-08-23 09:24:00
Nrc Rpt Num
1256131
Commodity Released Type
Natural Gas
Unintentional Release
402.6
Intentional Release
0.0
Fatality Ind
Yes
Num Emp Fatalities
0
Num Contr Fatalities
0
Num Er Fatalities
0
Num Worker Fatalities
0
Num Gp Fatalities
1
Fatal
1
Injury Ind
No
Injure
0
Ignite Ind
Yes
Ignite Datetime
2019-08-23 07:14:00
How Extinguished
Local/state/federal Emergency Responder
Gas Consumed By Fire In Mcf
402.6
Explode Ind
Yes
Num Pub Evacuated
2.0
Incident Identified Datetime
2019-08-23 07:14:00
On Site Datetime
2019-08-23 07:33:00
Federal
No
Location Type
Private Property
Incident Area Type
Underground
Incident Area Subtype
Under A Building
Depth Of Cover
15.0
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Service
Installation Year
1978.0
Customer Type
Single Family Residential
Was Efv Installed Before Ind
No
Curb Valve Inst Before Inc Ind
No
Pipe Diameter
0.5
Pipe Specification
Unknown
Pipe Manufacturer
Dupont
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Wt Plastic Unknown Ind
Unknown
Material Pe Pipe Code
Unknown
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 3 Location
Est Cost Oper Paid
200000.0
Est Cost Prop Damage
300.0
Est Cost Emergency
6400.0
Est Cost Other
0.0
Gas Cost In Mcf
0.473
Est Cost Unintentional Release
190.0
Est Cost Intentional Release
0.0
Prpty
206890.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
1.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
1.0
Num Business Building Affctd
0.0
Accident Psig
56.0
Normal Psig
58.0
Mop Psig
60.0
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1978-06-28 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Injection Pump
Gas Odorized Level
13
Scada In Place Ind
No
Accident Identifier
Notification From Emergency Responder
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Pipe, Weld, Or Joint Failure
Cause Details
Body Of Pipe
Pwjf Failure Type
Body Of Pipe
Pipe Body Subtype
Crack
Additional Crack Ind
Yes
Result Material Ind
Yes
Result Material Subtype
Other
Result Material Details
Ductile Crack
Hydrotest Conducted Ind
No
Preparer Name
R*** S*****
Preparer Title
Director Compliance Quality Assurance
Preparer Email
R******@s*********.com
Authorizer Name
R*** S*****
Authorizer Title
Director Compliance Quality Assurance
Authorizer Telephone
404-673-1063
Authorizer Email
R******@s*********.com
Narrative
Chattanooga gas company responded to a fire call at 411 hawkwood ct in hixson, tn on august 23, 2019 at 7:30 am. Bar hole testing over the 1/2-inch pe service that was conducted as part of the emergency response indicated gas readings at the building wall near the service riser. A subsequent pressure test of the service line did not hold pressure. Initial excavation of the facilities determined cause of leakage to be a leaking socket fusion on a transition fitting that transitioned the 1/2-inch pe service pipe to the 3/4-inch steel service riser. Further investigation revealed a crack in the body of the 1/2-inch pe service pipe to be the cause of leakage. The original report for this incident documented the apparent cause in part g as "g8 - other incident cause" as the cause of the leaking socket fusion at the time was still under investigation. As the above noted crack was found, the apparent cause in part g has been changed to "g5 - pipe, weld, or joint failure" - body of pipe - crack. The estimated volume of gas that was released from the time the incident was reported until the facilities were cut and capped (5hours - 1 minute) was 402.6 mcf. The gas was discharging through a broken 3/4" pipe at the meter set for approximately this time period. Total estimated volume and cost of gas released could not be determined as the length of time that facilities had been leaking could not be determined. The original telephonic report to the nrc indicated injury requiring inpatient hospitalization. This has been changed to fatality as the hospitalized person succumbed to the injuries sustained from the fire. Additional nrc report number 1256276 was created for the same event after a 48-hour supplemental call was placed with the nrc.
| Occurred At | 2019-08-23 07:14:00 |
|---|---|
| Year | 2019 |
| Report Received Date | 2019-09-21 00:00:00 |
| Iyear | 2019.0 |
| Report Number | 20190106.0 |
| Supplemental Number | 34668.0 |
| Report Type | Supplemental Final |
| Operator Id | 2288 PHMSA Enforcement |
| Name | Chattanooga Gas Co |
| Operator Street Address | 10 Peachtree Place Ne |
| Operator City Name | Atlanta |
| Operator State Abbreviation | GA |
| Operator Postal Code | 30309 |
| Local Datetime | 2019-08-23 07:05:00 |
| Time Zone | Eastern |
| Daylight Savings Ind | No |
| Location Street Address | 411 Hawkwood Ct |
| Location City Name | Hixson |
| Location County Name | Hamilton |
| Location State Abbreviation | TN |
| Location Postal Code | 37343 |
| Location Latitude | 35.1817 Google Maps OpenStreetMap |
| Location Longitude | -85.2233 Google Maps OpenStreetMap |
| Flow Cont Squeeze Off Ind | Yes |
| Nrc Rpt Datetime | 2019-08-23 09:24:00 |
| Nrc Rpt Num | 1256131 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 402.6 |
| Intentional Release | 0.0 |
| Fatality Ind | Yes |
| Num Emp Fatalities | 0 |
| Num Contr Fatalities | 0 |
| Num Er Fatalities | 0 |
| Num Worker Fatalities | 0 |
| Num Gp Fatalities | 1 |
| Fatal | 1 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | Yes |
| Ignite Datetime | 2019-08-23 07:14:00 |
| How Extinguished | Local/state/federal Emergency Responder |
| Gas Consumed By Fire In Mcf | 402.6 |
| Explode Ind | Yes |
| Num Pub Evacuated | 2.0 |
| Incident Identified Datetime | 2019-08-23 07:14:00 |
| On Site Datetime | 2019-08-23 07:33:00 |
| Federal | No |
| Location Type | Private Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under A Building |
| Depth Of Cover | 15.0 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Service |
| Installation Year | 1978.0 |
| Customer Type | Single Family Residential |
| Was Efv Installed Before Ind | No |
| Curb Valve Inst Before Inc Ind | No |
| Pipe Diameter | 0.5 |
| Pipe Specification | Unknown |
| Pipe Manufacturer | Dupont |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Wt Plastic Unknown Ind | Unknown |
| Material Pe Pipe Code | Unknown |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 200000.0 |
| Est Cost Prop Damage | 300.0 |
| Est Cost Emergency | 6400.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 0.473 |
| Est Cost Unintentional Release | 190.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 206890.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 1.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 1.0 |
| Num Business Building Affctd | 0.0 |
| Accident Psig | 56.0 |
| Normal Psig | 58.0 |
| Mop Psig | 60.0 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1978-06-28 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Injection Pump |
| Gas Odorized Level | 13 |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Emergency Responder |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Pipe, Weld, Or Joint Failure |
| Cause Details | Body Of Pipe |
| Pwjf Failure Type | Body Of Pipe |
| Pipe Body Subtype | Crack |
| Additional Crack Ind | Yes |
| Result Material Ind | Yes |
| Result Material Subtype | Other |
| Result Material Details | Ductile Crack |
| Hydrotest Conducted Ind | No |
| Preparer Name | R*** S***** |
| Preparer Title | Director Compliance Quality Assurance |
| Preparer Email | R******@s*********.com |
| Authorizer Name | R*** S***** |
| Authorizer Title | Director Compliance Quality Assurance |
| Authorizer Telephone | 404-673-1063 |
| Authorizer Email | R******@s*********.com |
| Narrative | Chattanooga gas company responded to a fire call at 411 hawkwood ct in hixson, tn on august 23, 2019 at 7:30 am. Bar hole testing over the 1/2-inch pe service that was conducted as part of the emergency response indicated gas readings at the building wall near the service riser. A subsequent pressure test of the service line did not hold pressure. Initial excavation of the facilities determined cause of leakage to be a leaking socket fusion on a transition fitting that transitioned the 1/2-inch pe service pipe to the 3/4-inch steel service riser. Further investigation revealed a crack in the body of the 1/2-inch pe service pipe to be the cause of leakage. The original report for this incident documented the apparent cause in part g as "g8 - other incident cause" as the cause of the leaking socket fusion at the time was still under investigation. As the above noted crack was found, the apparent cause in part g has been changed to "g5 - pipe, weld, or joint failure" - body of pipe - crack. The estimated volume of gas that was released from the time the incident was reported until the facilities were cut and capped (5hours - 1 minute) was 402.6 mcf. The gas was discharging through a broken 3/4" pipe at the meter set for approximately this time period. Total estimated volume and cost of gas released could not be determined as the length of time that facilities had been leaking could not be determined. The original telephonic report to the nrc indicated injury requiring inpatient hospitalization. This has been changed to fatality as the hospitalized person succumbed to the injuries sustained from the fire. Additional nrc report number 1256276 was created for the same event after a 48-hour supplemental call was placed with the nrc. |
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