Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2011-03-02 — CA
Operator
Southwest Gas Corp
Cause
Pipe, Weld, Or Joint Failure
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$1,800
Incident datetime
2011-03-02 12:41
Report number
Location
CA, NEVADA
Narrative
On wednesday, march 2, 2011, a homeowner in truckee, ca contacted southwest gas corporation due to no pressure at his heater and a natural gas odor outside. Southwest gas personnel responded to the site and discovered 97% gas over the service line. The service technician requested assistance from the construction department and asked that the fire department be notified. Ten homes were initially evacuated with the help of the fire department. A leak was repaired by replacing the service tap tee. The probable cause of the leak was a construction defect. The residences for six of the homes were allowed to return to their residences that evening once the hazard was eliminated and gas reads at the base of the structures were non-hazardous. Due to residual gas reads at the foundation of the structures of the remaining four homes, their evacuation lasted for 12 days until, march 14, 2011. The customers were allowed to return to their residences once the hazard was eliminated and gas reads at the base of the structures were non-hazardous. Aeration of residual gas away from the structures continued until march 25, 2011 when gas reads were eliminated. On thursday, march 21, 2011, southwest gas became aware of local media attention due to the extended evacuation and notified the california public utilities commission (cpuc) based on their reporting standards. On march 23, 2011, it was determined by southwest gas that the extended aeration and customer reimbursement costs would accumulate above the $50,000 reportable threshold. The incident was then reported to the national response center.
Detailed record list
Occurred At
2011-03-02 12:41:00
Year
2011
Report Received Date
2011-04-19 00:00:00
Iyear
2011.0
Report Number
20110062.0
Supplemental Number
15317.0
Report Type
Supplemental Final
Operator Id
18536
Name
Southwest Gas Corp
Operator Street Address
400 Eagle Station Lane
Operator City Name
Carson City
Operator State Abbreviation
NV
Operator Postal Code
897018401
Local Datetime
2011-03-02 12:41:00
Location Street Address
10397 Royal Crest
Location City Name
Truckee
Location County Name
Nevada
Location State Abbreviation
CA
Location Postal Code
96161-1187
Location Latitude
39.34868
Location Longitude
-120.10775
Nrc Rpt Datetime
2011-03-23 15:45:00
Nrc Rpt Num
970970
Commodity Released Type
Natural Gas
Unintentional Release
158.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
10.0
Incident Identified Datetime
2011-03-02 12:41:00
On Site Datetime
2011-03-02 13:25:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
36.0
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Service
Installation Year
1996.0
Pipe Diameter
0.5
Pipe Specification
Astm D2513
Pipe Manufacturer
Driscopipe
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Wt Plastic
0.091
Material Pe Pipe Code
3408
Release Type
Leak
Leak Type
Connection Failure
Class Location Type
Class 3 Location
Est Cost Oper Paid
900.0
Est Cost Prop Damage
1800.0
Est Cost Emergency
67929.0
Est Cost Other
17972.0
Est Cost Other Details
Customer Reimbursement During Evacuation.
Est Cost Unintentional Release
1275.0
Prpty
89876.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
6.0
Accident Psig
60.0
Normal Psig
60.0
Mop Psig
60.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
No
Accident Identifier
Notification From Public
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
Mechanical Joint Failure
Pwjf Failure Type
Mechanical Joint Failure
Mec Fitting Involved
Nut Follower
Mec Fitting Type
Service Or Main Tee
Mec Manufacturer
Continental
Mec Fitting Material
Other
Mec Fitting Material Detail
Materials Joined: 1st Plastic, 2nd Plastic
Additional Other Ind
Yes
Result Construction Ind
Yes
Result Construction Subtype
Procedure Not Followed
Hydrotest Conducted Ind
Yes
Hydrotest Conducted Year
1996
Hydrotest Pressure
90
Preparer Name
M****** H******
Preparer Title
Supervisor Engineering
Preparer Email
M**************@s****.com
Preparer Telephone
775-887-2871
Preparer Fax
775-884-3012
Authorizer Name
B**** E*****
Authorizer Title
Director District Opererations Northern Nevada
Authorizer Telephone
775-887-2744
Authorizer Email
B***********@s****.com
Narrative
On wednesday, march 2, 2011, a homeowner in truckee, ca contacted southwest gas corporation due to no pressure at his heater and a natural gas odor outside. Southwest gas personnel responded to the site and discovered 97% gas over the service line. The service technician requested assistance from the construction department and asked that the fire department be notified. Ten homes were initially evacuated with the help of the fire department. A leak was repaired by replacing the service tap tee. The probable cause of the leak was a construction defect. The residences for six of the homes were allowed to return to their residences that evening once the hazard was eliminated and gas reads at the base of the structures were non-hazardous. Due to residual gas reads at the foundation of the structures of the remaining four homes, their evacuation lasted for 12 days until, march 14, 2011. The customers were allowed to return to their residences once the hazard was eliminated and gas reads at the base of the structures were non-hazardous. Aeration of residual gas away from the structures continued until march 25, 2011 when gas reads were eliminated. On thursday, march 21, 2011, southwest gas became aware of local media attention due to the extended evacuation and notified the california public utilities commission (cpuc) based on their reporting standards. On march 23, 2011, it was determined by southwest gas that the extended aeration and customer reimbursement costs would accumulate above the $50,000 reportable threshold. The incident was then reported to the national response center.
| Occurred At | 2011-03-02 12:41:00 |
|---|---|
| Year | 2011 |
| Report Received Date | 2011-04-19 00:00:00 |
| Iyear | 2011.0 |
| Report Number | 20110062.0 |
| Supplemental Number | 15317.0 |
| Report Type | Supplemental Final |
| Operator Id | 18536 PHMSA Enforcement |
| Name | Southwest Gas Corp |
| Operator Street Address | 400 Eagle Station Lane |
| Operator City Name | Carson City |
| Operator State Abbreviation | NV |
| Operator Postal Code | 897018401 |
| Local Datetime | 2011-03-02 12:41:00 |
| Location Street Address | 10397 Royal Crest |
| Location City Name | Truckee |
| Location County Name | Nevada |
| Location State Abbreviation | CA |
| Location Postal Code | 96161-1187 |
| Location Latitude | 39.34868 Google Maps OpenStreetMap |
| Location Longitude | -120.10775 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2011-03-23 15:45:00 |
| Nrc Rpt Num | 970970 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 158.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 10.0 |
| Incident Identified Datetime | 2011-03-02 12:41:00 |
| On Site Datetime | 2011-03-02 13:25:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 36.0 |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Service |
| Installation Year | 1996.0 |
| Pipe Diameter | 0.5 |
| Pipe Specification | Astm D2513 |
| Pipe Manufacturer | Driscopipe |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Wt Plastic | 0.091 |
| Material Pe Pipe Code | 3408 |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 900.0 |
| Est Cost Prop Damage | 1800.0 |
| Est Cost Emergency | 67929.0 |
| Est Cost Other | 17972.0 |
| Est Cost Other Details | Customer Reimbursement During Evacuation. |
| Est Cost Unintentional Release | 1275.0 |
| Prpty | 89876.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 6.0 |
| Accident Psig | 60.0 |
| Normal Psig | 60.0 |
| Mop Psig | 60.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Public |
| 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 | Mechanical Joint Failure |
| Pwjf Failure Type | Mechanical Joint Failure |
| Mec Fitting Involved | Nut Follower |
| Mec Fitting Type | Service Or Main Tee |
| Mec Manufacturer | Continental |
| Mec Fitting Material | Other |
| Mec Fitting Material Detail | Materials Joined: 1st Plastic, 2nd Plastic |
| Additional Other Ind | Yes |
| Result Construction Ind | Yes |
| Result Construction Subtype | Procedure Not Followed |
| Hydrotest Conducted Ind | Yes |
| Hydrotest Conducted Year | 1996 |
| Hydrotest Pressure | 90 |
| Preparer Name | M****** H****** |
| Preparer Title | Supervisor Engineering |
| Preparer Email | M**************@s****.com |
| Preparer Telephone | 775-887-2871 |
| Preparer Fax | 775-884-3012 |
| Authorizer Name | B**** E***** |
| Authorizer Title | Director District Opererations Northern Nevada |
| Authorizer Telephone | 775-887-2744 |
| Authorizer Email | B***********@s****.com |
| Narrative | On wednesday, march 2, 2011, a homeowner in truckee, ca contacted southwest gas corporation due to no pressure at his heater and a natural gas odor outside. Southwest gas personnel responded to the site and discovered 97% gas over the service line. The service technician requested assistance from the construction department and asked that the fire department be notified. Ten homes were initially evacuated with the help of the fire department. A leak was repaired by replacing the service tap tee. The probable cause of the leak was a construction defect. The residences for six of the homes were allowed to return to their residences that evening once the hazard was eliminated and gas reads at the base of the structures were non-hazardous. Due to residual gas reads at the foundation of the structures of the remaining four homes, their evacuation lasted for 12 days until, march 14, 2011. The customers were allowed to return to their residences once the hazard was eliminated and gas reads at the base of the structures were non-hazardous. Aeration of residual gas away from the structures continued until march 25, 2011 when gas reads were eliminated. On thursday, march 21, 2011, southwest gas became aware of local media attention due to the extended evacuation and notified the california public utilities commission (cpuc) based on their reporting standards. On march 23, 2011, it was determined by southwest gas that the extended aeration and customer reimbursement costs would accumulate above the $50,000 reportable threshold. The incident was then reported to the national response center. |
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