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GFE Tip 007
Recommended Tests During the Post Fire Atmospheric Testing Phase

These are the recommended tests required per class of fire that should to be performed during the post fire atmospheric testing phase of combating a casualty.

 

Class Fire Recommended Tests Amplifying Information
Class Alpha fire “A” Oxygen: 19.5% – 22%
Combustible – Less than 10% LEL
Carbon monoxide
Carbon dioxide
Hydrogen chloride (HCL)
Hydrogen cyanide (HCN)
Vinyl chloride
Sulfur dioxide
R-12 (Freon)/Phosgene
CBR (if required)
Level sustain life without SCBA/OBA
Space unstable above 10% LEL
Incomplete combustion
Complete combustion
Electrical insulation
Lagging
PVC cable
Rubber tubing, gaskets, & seals
Refrigerant
See NSTM 470
Class Bravo fire “B” Oxygen: 19.5% – 22%
Combustible – Less than 10% LEL
Carbon monoxide
Carbon dioxide
Hydrogen chloride (HCL)
Hydrogen cyanide (HCN)
Vinyl chloride
Sulfur dioxide
Hydrocarbon
Hydrogen fluoride
Hydrogen bromide
Benzene
Octane
CBR (if required)
Level sustain life without SCBA/OBA
Space unstable above 10% LEL
Incomplete combustion
Complete combustion
Electrical insulation
Lagging
PVC cable
Rubber tubing, gaskets, & seals
Flammable liquids
HALON decomposition
HALON
Diesel fuel
Diesel fuel marine/JP fuels
See NSTM 470
Class Charlie fire “C” Oxygen: 19.5% – 22%
Combustible – Less than 10% LEL
Carbon monoxide
Carbon dioxide
Hydrogen chloride (HCL)
Hydrogen cyanide (HCN)
Vinyl chloride
Sulfur dioxide
CBR (if required)
Level sustain life without SCBA/OBA
Space unstable above 10% LEL
Incomplete combustion
Complete combustion
Electrical insulation
Lagging
PVC cable
Rubber tubing, gaskets, & seals
See NSTM 470