| Hazard | Respirator |
|---|---|
| Gas or Vapor Contaminants | |
| Oxygen Deficiency | Self-contained breathing apparatus. Combination air-line respirator with auxiliary positive pressure self-contained air supply. |
| Immediately dangerous to life or health. | Self-contained breathing apparatus in positive pressure mode. Air-purifying, full face piece respirator with chemical canister (gas mask) for escape only. Self-rescue mouth piece respirator (for escape only). Combination air-line respirator with auxiliary positive pressure self-contained air supply. |
| Not immediately dangerous to life or health. | Air-line respirator Air-purifying, half-mask of full face piece respirator with chemical cartridge(s) or canister. |
| Particulate Contaminants | |
| Immediately dangerous to life or health | Self-contained breathing apparatus in positive pressure mode. Air-purifying, full face piece respirator with appropriate filter (for escape only). Self-rescue mouthpiece respirator (for escape only). Combination air-line respirator with auxiliary positive pressure self-contained air supply. |
| Not immediately dangerous to life or health | Air-purifying,half-mask or full face piece respirator with tiller pad or cartridges. Air-linerespirator. Air-line abrasive-blasting respirator. |
| Combination Gas, Vapor, and Particulate Contaminants | |
| Immediately dangerous to life or health. | Self-contained breathing apparatus inpositive pressure mode. Air-purifyingfull face piece respirator with chemical canister and appropriate filter (gasmask with filter for escape only). Self-rescue mouthpiece respirator (forescape only). Combination air-line respirator with auxiliary positive pressureself-contained air supply. |
| Not immediately dangerous to life or health. | Air-line respirator. Air-purifying,half-mask or full face piece respirator with chemical cartridge or canister andappropriate filter. |
Source: ANSI Z88.2-1980 “Practices for Respiratory Protection.”