Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2010-12-19 — VA
Operator
Washington Gas Light Co
Cause
Other Incident Cause
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$15,000
Incident datetime
2010-12-19 20:57
Report number
Location
VA, FAIRFAX
Narrative
Washington gas was told by the fire department that the meter valve was turned off by them at approximately 22:00. Upon gaining access to the meter on december 20th, washington gas conducted a pressure test on the service line from the meter valve to the capped off location at the main. The service was tested at the operating pressure for 15 minutes. The service line held the pressure test. An odorant sample was taken and the level of odorant was determined to be acceptable. Washington gas has conducted all the necessary tests and activities on the system. Although post incident investigation found corrosion at the connection at the service tee, on the steel main, neither washington gas nor the fire department investigation established migration of gas from the washington gas facility to the structure prior to the incident. Additionally, an open-ended section of the customer fuel line terminating on the second floor was found. As the interior fuel line operated at approximately .25 psig, gas would be escaping from this opening at that pressure until the service regulator ceased to function properly as a result of the damage from this incident. The root cause of this incident remains undetermined; therefore, the answers to questions numbers 14 & 15 remain "no". While the fairfax county fire department may have concluded, on december 31, 2010, that natural gas contributed to the incident, it has yet to be determined who or what was at fault. Based upon all known information, the cause is undetermined.
Detailed record list
Occurred At
2010-12-19 20:57:00
Year
2010
Report Received Date
2011-01-18 00:00:00
Iyear
2010.0
Report Number
20110009.0
Supplemental Number
33412.0
Report Type
Supplemental Final
Operator Id
22182
Name
Washington Gas Light Co
Operator Street Address
1000 Maine Avenue, Sw
Operator City Name
Washington
Operator State Abbreviation
DC
Operator Postal Code
20024
Local Datetime
2010-12-19 20:57:00
Location Street Address
4303 Lees Corner Road
Location City Name
Chantilly
Location County Name
Fairfax
Location State Abbreviation
VA
Location Postal Code
20151
Location Latitude
38.88067
Location Longitude
-77.42052
Nrc Rpt Datetime
2010-12-19 22:20:00
Nrc Rpt Num
962692
Commodity Released Type
Natural Gas
Unintentional Release
6.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2010-12-19 20:57:00
On Site Datetime
2010-12-19 21:15:00
Federal
No
Location Type
Private Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance (E.g. Value Or Regulator Station, Outdoor Meter Set)
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Outside Meter/regulator Set
Installation Year
1966.0
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown
Release Type
Other
Release Type Details
Damage To The Meter Build-Up As A Result Of An Explosion And Resulting Fire.
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
15000.0
Est Cost Emergency
12000.0
Est Cost Other
420000.0
Est Cost Other Details
Approximate Value Of The Buildings Damaged By The Explosion And Resulting Fire.
Est Cost Unintentional Release
35.0
Prpty
447035.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
1.0
Accident Psig
55.0
Normal Psig
55.0
Mop Psig
60.0
Accident Pressure
Pressure Did Not Exceed Maop
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
Other Incident Cause
Cause Details
Unknown
Other Type
Unknown
Unknown Subtype
Investigation Complete, Cause Of Incident Unknown
Preparer Name
R****** F**********
Preparer Title
Dot Pipeline Safety Supervisor
Preparer Email
R*****************@w******.com
Preparer Telephone
7037505921
Authorizer Name
S****** P****
Authorizer Title
Avp Safety Quality System Protection
Authorizer Telephone
7037504586
Authorizer Email
S*****@w******.com
Narrative
Washington gas was told by the fire department that the meter valve was turned off by them at approximately 22:00. Upon gaining access to the meter on december 20th, washington gas conducted a pressure test on the service line from the meter valve to the capped off location at the main. The service was tested at the operating pressure for 15 minutes. The service line held the pressure test. An odorant sample was taken and the level of odorant was determined to be acceptable. Washington gas has conducted all the necessary tests and activities on the system. Although post incident investigation found corrosion at the connection at the service tee, on the steel main, neither washington gas nor the fire department investigation established migration of gas from the washington gas facility to the structure prior to the incident. Additionally, an open-ended section of the customer fuel line terminating on the second floor was found. As the interior fuel line operated at approximately .25 psig, gas would be escaping from this opening at that pressure until the service regulator ceased to function properly as a result of the damage from this incident. The root cause of this incident remains undetermined; therefore, the answers to questions numbers 14 & 15 remain "no". While the fairfax county fire department may have concluded, on december 31, 2010, that natural gas contributed to the incident, it has yet to be determined who or what was at fault. Based upon all known information, the cause is undetermined.
| Occurred At | 2010-12-19 20:57:00 |
|---|---|
| Year | 2010 |
| Report Received Date | 2011-01-18 00:00:00 |
| Iyear | 2010.0 |
| Report Number | 20110009.0 |
| Supplemental Number | 33412.0 |
| Report Type | Supplemental Final |
| Operator Id | 22182 PHMSA Enforcement |
| Name | Washington Gas Light Co |
| Operator Street Address | 1000 Maine Avenue, Sw |
| Operator City Name | Washington |
| Operator State Abbreviation | DC |
| Operator Postal Code | 20024 |
| Local Datetime | 2010-12-19 20:57:00 |
| Location Street Address | 4303 Lees Corner Road |
| Location City Name | Chantilly |
| Location County Name | Fairfax |
| Location State Abbreviation | VA |
| Location Postal Code | 20151 |
| Location Latitude | 38.88067 Google Maps OpenStreetMap |
| Location Longitude | -77.42052 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2010-12-19 22:20:00 |
| Nrc Rpt Num | 962692 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 6.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2010-12-19 20:57:00 |
| On Site Datetime | 2010-12-19 21:15:00 |
| Federal | No |
| Location Type | Private Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance (E.g. Value Or Regulator Station, Outdoor Meter Set) |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Outside Meter/regulator Set |
| Installation Year | 1966.0 |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown |
| Release Type | Other |
| Release Type Details | Damage To The Meter Build-Up As A Result Of An Explosion And Resulting Fire. |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 15000.0 |
| Est Cost Emergency | 12000.0 |
| Est Cost Other | 420000.0 |
| Est Cost Other Details | Approximate Value Of The Buildings Damaged By The Explosion And Resulting Fire. |
| Est Cost Unintentional Release | 35.0 |
| Prpty | 447035.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 1.0 |
| Accident Psig | 55.0 |
| Normal Psig | 55.0 |
| Mop Psig | 60.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| 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 | Other Incident Cause |
| Cause Details | Unknown |
| Other Type | Unknown |
| Unknown Subtype | Investigation Complete, Cause Of Incident Unknown |
| Preparer Name | R****** F********** |
| Preparer Title | Dot Pipeline Safety Supervisor |
| Preparer Email | R*****************@w******.com |
| Preparer Telephone | 7037505921 |
| Authorizer Name | S****** P**** |
| Authorizer Title | Avp Safety Quality System Protection |
| Authorizer Telephone | 7037504586 |
| Authorizer Email | S*****@w******.com |
| Narrative | Washington gas was told by the fire department that the meter valve was turned off by them at approximately 22:00. Upon gaining access to the meter on december 20th, washington gas conducted a pressure test on the service line from the meter valve to the capped off location at the main. The service was tested at the operating pressure for 15 minutes. The service line held the pressure test. An odorant sample was taken and the level of odorant was determined to be acceptable. Washington gas has conducted all the necessary tests and activities on the system. Although post incident investigation found corrosion at the connection at the service tee, on the steel main, neither washington gas nor the fire department investigation established migration of gas from the washington gas facility to the structure prior to the incident. Additionally, an open-ended section of the customer fuel line terminating on the second floor was found. As the interior fuel line operated at approximately .25 psig, gas would be escaping from this opening at that pressure until the service regulator ceased to function properly as a result of the damage from this incident. The root cause of this incident remains undetermined; therefore, the answers to questions numbers 14 & 15 remain "no". While the fairfax county fire department may have concluded, on december 31, 2010, that natural gas contributed to the incident, it has yet to be determined who or what was at fault. Based upon all known information, the cause is undetermined. |
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