Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2017-07-02 — PA
Operator
Ugi Utilities, Inc
Cause
Pipe, Weld, Or Joint Failure
Commodity
Natural Gas
Program
GD
Damage and Injuries
1 fatality
3 injuries
Property damage (nominal)
$27,000
Incident datetime
2017-07-02 10:26
Report number
Location
PA, LANCASTER
Narrative
This is a supplemental and final report being filed to provide updated incident information: after responding to a gas odor complaint at 202 springdale lane, millersville, pa, ugi workers detected a natural gas leak near 206 springdale lane. Natural gas was traced to an area above a mechanical tapping tee that was buried under approximately 3 feet of soil, near 206 springdale lane. During the company response, at approximately 12:32 pm, there was an explosion at 206 springdale lane. As a result of the explosion, 1 employee fatality occurred, and 3 non-fatal injuries were sustained. The explosion and subsequent fire rendered the dwelling at 206 springdale lane a total loss and nearby residences sustained varying degrees of damage. The probable cause of this accident was a leak in the connection of a perfection permalock mechanical tapping tee assembly that connected the gas main to the service line for 206 springdale lane, millersville, pa. For further details, please refer to ntsb pipeline accident brief pab-19-01.
Detailed record list
Occurred At
2017-07-02 10:26:00
Year
2017
Report Received Date
2017-08-01 00:00:00
Iyear
2017.0
Report Number
20170064.0
Supplemental Number
33969.0
Report Type
Supplemental Final
Operator Id
20010
Name
Ugi Utilities, Inc
Operator Street Address
1 Ugi Drive
Operator City Name
Denver
Operator State Abbreviation
PA
Operator Postal Code
17517
Local Datetime
2017-07-02 12:32:00
Location Street Address
206 Springdale Lane
Location City Name
Millersville
Location County Name
Lancaster
Location State Abbreviation
PA
Location Postal Code
17551
Location Latitude
39.99802
Location Longitude
-76.37392
Nrc Rpt Datetime
2017-07-02 13:52:00
Nrc Rpt Num
1182921
Commodity Released Type
Natural Gas
Unintentional Release
120.0
Fatality Ind
Yes
Num Emp Fatalities
1
Num Contr Fatalities
0
Num Er Fatalities
0
Num Worker Fatalities
0
Num Gp Fatalities
0
Fatal
1
Injury Ind
Yes
Num Emp Injuries
2
Num Contr Injuries
0
Num Er Injuries
0
Num Worker Injuries
1
Num Gp Injuries
0
Injure
3
Ignite Ind
Yes
Explode Ind
Yes
Num Pub Evacuated
1.0
Incident Identified Datetime
2017-07-02 10:26:00
On Site Datetime
2017-07-02 11:00:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
36.0
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Service
Installation Year
1998.0
Pipe Diameter
0.5
Pipe Specification
Astm 2513
Pipe Manufacturer
Uponor
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Plastic Sdr
7
Material Pe Pipe Code
2406
Release Type
Leak
Leak Type
Connection Failure
Class Location Type
Class 3 Location
Est Cost Oper Paid
1617000.0
Est Cost Prop Damage
27000.0
Est Cost Emergency
588000.0
Est Cost Other
0.0
Est Cost Unintentional Release
230.0
Prpty
2232230.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
22.0
Accident Psig
54.0
Normal Psig
54.0
Mop Psig
60.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Notification From Public
Investigation Status
No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate)
Investigation Status Details
The failure occurred on a medium pressure distribution system. Pressures and flow rates were within normal ranges before, during, and after the incident. Actions by the control room did not impact the incident.
Employee Drug Test Ind
Yes
Num Employees Tested
8
Num Employees Failed
0
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
Bolted
Mec Fitting Type
Service Or Main Tee
Mec Manufacturer
Perfection Corporation
Mec Fitting Material
Other
Mec Fitting Material Detail
Materials Joined: 1st Plastic, 2nd Plastic
Additional Other Ind
Yes
Additional Factor Details
2 Out Of 4 Nylon Bolts On A 2" Perfection Mechanical Tapping Tee Fractured Allowing The Tee To Separate From The Main, Allowing Gas To Escape.
Result Design Ind
Yes
Hydrotest Conducted Ind
No
Preparer Name
J*** T*****
Preparer Title
Senior Engineer
Preparer Email
J******@u**.com
Preparer Telephone
717 675 4606
Authorizer Name
H*** B***
Authorizer Title
Chief Operating Officer
Authorizer Telephone
610 796-3450
Authorizer Email
H****@u**.com
Narrative
This is a supplemental and final report being filed to provide updated incident information: after responding to a gas odor complaint at 202 springdale lane, millersville, pa, ugi workers detected a natural gas leak near 206 springdale lane. Natural gas was traced to an area above a mechanical tapping tee that was buried under approximately 3 feet of soil, near 206 springdale lane. During the company response, at approximately 12:32 pm, there was an explosion at 206 springdale lane. As a result of the explosion, 1 employee fatality occurred, and 3 non-fatal injuries were sustained. The explosion and subsequent fire rendered the dwelling at 206 springdale lane a total loss and nearby residences sustained varying degrees of damage. The probable cause of this accident was a leak in the connection of a perfection permalock mechanical tapping tee assembly that connected the gas main to the service line for 206 springdale lane, millersville, pa. For further details, please refer to ntsb pipeline accident brief pab-19-01.
| Occurred At | 2017-07-02 10:26:00 |
|---|---|
| Year | 2017 |
| Report Received Date | 2017-08-01 00:00:00 |
| Iyear | 2017.0 |
| Report Number | 20170064.0 |
| Supplemental Number | 33969.0 |
| Report Type | Supplemental Final |
| Operator Id | 20010 PHMSA Enforcement |
| Name | Ugi Utilities, Inc |
| Operator Street Address | 1 Ugi Drive |
| Operator City Name | Denver |
| Operator State Abbreviation | PA |
| Operator Postal Code | 17517 |
| Local Datetime | 2017-07-02 12:32:00 |
| Location Street Address | 206 Springdale Lane |
| Location City Name | Millersville |
| Location County Name | Lancaster |
| Location State Abbreviation | PA |
| Location Postal Code | 17551 |
| Location Latitude | 39.99802 Google Maps OpenStreetMap |
| Location Longitude | -76.37392 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2017-07-02 13:52:00 |
| Nrc Rpt Num | 1182921 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 120.0 |
| Fatality Ind | Yes |
| Num Emp Fatalities | 1 |
| Num Contr Fatalities | 0 |
| Num Er Fatalities | 0 |
| Num Worker Fatalities | 0 |
| Num Gp Fatalities | 0 |
| Fatal | 1 |
| Injury Ind | Yes |
| Num Emp Injuries | 2 |
| Num Contr Injuries | 0 |
| Num Er Injuries | 0 |
| Num Worker Injuries | 1 |
| Num Gp Injuries | 0 |
| Injure | 3 |
| Ignite Ind | Yes |
| Explode Ind | Yes |
| Num Pub Evacuated | 1.0 |
| Incident Identified Datetime | 2017-07-02 10:26:00 |
| On Site Datetime | 2017-07-02 11:00:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 36.0 |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Service |
| Installation Year | 1998.0 |
| Pipe Diameter | 0.5 |
| Pipe Specification | Astm 2513 |
| Pipe Manufacturer | Uponor |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Plastic Sdr | 7 |
| Material Pe Pipe Code | 2406 |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 1617000.0 |
| Est Cost Prop Damage | 27000.0 |
| Est Cost Emergency | 588000.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 230.0 |
| Prpty | 2232230.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 22.0 |
| Accident Psig | 54.0 |
| Normal Psig | 54.0 |
| Mop Psig | 60.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Notification From Public |
| Investigation Status | No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate) |
| Investigation Status Details | The failure occurred on a medium pressure distribution system. Pressures and flow rates were within normal ranges before, during, and after the incident. Actions by the control room did not impact the incident. |
| Employee Drug Test Ind | Yes |
| Num Employees Tested | 8 |
| Num Employees Failed | 0 |
| 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 | Bolted |
| Mec Fitting Type | Service Or Main Tee |
| Mec Manufacturer | Perfection Corporation |
| Mec Fitting Material | Other |
| Mec Fitting Material Detail | Materials Joined: 1st Plastic, 2nd Plastic |
| Additional Other Ind | Yes |
| Additional Factor Details | 2 Out Of 4 Nylon Bolts On A 2" Perfection Mechanical Tapping Tee Fractured Allowing The Tee To Separate From The Main, Allowing Gas To Escape. |
| Result Design Ind | Yes |
| Hydrotest Conducted Ind | No |
| Preparer Name | J*** T***** |
| Preparer Title | Senior Engineer |
| Preparer Email | J******@u**.com |
| Preparer Telephone | 717 675 4606 |
| Authorizer Name | H*** B*** |
| Authorizer Title | Chief Operating Officer |
| Authorizer Telephone | 610 796-3450 |
| Authorizer Email | H****@u**.com |
| Narrative | This is a supplemental and final report being filed to provide updated incident information: after responding to a gas odor complaint at 202 springdale lane, millersville, pa, ugi workers detected a natural gas leak near 206 springdale lane. Natural gas was traced to an area above a mechanical tapping tee that was buried under approximately 3 feet of soil, near 206 springdale lane. During the company response, at approximately 12:32 pm, there was an explosion at 206 springdale lane. As a result of the explosion, 1 employee fatality occurred, and 3 non-fatal injuries were sustained. The explosion and subsequent fire rendered the dwelling at 206 springdale lane a total loss and nearby residences sustained varying degrees of damage. The probable cause of this accident was a leak in the connection of a perfection permalock mechanical tapping tee assembly that connected the gas main to the service line for 206 springdale lane, millersville, pa. For further details, please refer to ntsb pipeline accident brief pab-19-01. |
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