1
. A Code 3 leak can be described as
No danger to life and property, Investigator can handle, and the leak is inside or outside and can easily be repaired without danger.
How does frozen ground or wall-to-wall pavement affect underground gas migration?
Gas moves laterally, until it finds a path to follow
According to O&M 3, what would be an example of a hazardous condition?
Vent connector improperly sized causing spillage
(O&M 25) A leak that represents an existing or probable hazard to persons or property, and requires immediate repair or continuous action until the conditions are no longer hazardous is:
A 'Grade 1' leak
On a leak order at a customer's house, what can be performed while continuing with the outdoor leak investigation?
A meter shut-in or pressure drop test.
For line hits involving blowing gas, the investigator shall
implement Code 2 procedures unless they feel it should be upgraded.
Who is responsible to maintain a record log of which field employees were contacted and sent to the scene of a Code 1?
The Field Resource Center
If gas readings are found during bar-hole testing, then testing must be continued until you _____________________ in all four cardinal directions
0% gas
If 10% LEL (0.4% gas in air) is detected on CGI, or, in the investigator’s judgment, a hazardous condition exists, implement
Code 1 Procedures
The most common problem with Combustible Gas Indicators not working correctly is:
Battery issues
(O&M 25) A leak that is non-hazardous at the time of detection and can be reasonably expected to remain nonhazardous is:
Grade 3 leak
When you prepare to enter the suspected structure for a gas leak investigation you should?
Knock on the door.
(O&M 25) You find a leak near a building. Your barhole reading reveals there is 71% gas which is 15 feet from the foundation. Which grade would this leak be classified?
Grade 1
According to BHE O&M116 what is an example of an order that should take priority over all other work?
Gas related fire.
All gas leaks and reports of gas odor are potential dangers to life and property and shall
Take priority over any other type of work.
You arrive at a leak call, and your CGI indicates of 14% on the LEL scale. What is the first procedure to complete?
Safely evacuate and do not reenter
(O&M 25) How many leak grades does Black Hills Energy recognize?
3
If 50 PPM of CO is found, or if occupant shows signs of unconsciousness, flu, headache, etc., i
Code 10 Procedures
On a Code 1, what step do you take upon arrival of Police and Fire Departments?
Secure the area.
You are using a Gas-Sentry CGI. Which scale should you have selected before entering a structure on a gas leak?
LEL
A Sensit Gold G2 Combustible Gas Indicator shows 75% on the LEL scale. That can also be converted to:
3% gas
Double Points
When excavation damage is caused by boring, check for additional leaks and migration by bar holing _______________________
the entire bore path.
If 20 PPM of CO is found and the occupant shows signs of unconsciousness, flu, headache, etc., implement
Code 10 Procedures
Wager of Points
According to the Uncontrolled Release of Gas Policy, how frequently must the atmosphere be checked with a CGI in the area of the hazardous environment?
It must be used continously.
According to O&M 116, if you have a 4-inch gas pipe, with 100 psig flowing through the pipe, the minimum evacuation distance is:
91 feet