Module 3. Gas Incident Response

Indoor gas leaks: Monitor the atmosphere

Use your CGI to monitor the air around the building.

If gas concentrations are well below the lower flammable limit of 5 percent and you can enter the building without risk, check for natural gas in the following locations:

  • The areas where any underground water, sewer, electric or drain lines enter the building.
  • The regulator, meter bar and all piping that supplies natural gas, as well as the piping around all gas-fired appliances, such as water heaters and clothes dryers.
  • The spot where the gas service enters the building.
  • Any cracks in the wall.
  • All high points in the ceiling where natural gas could collect.