| Note: | The requirements in this chapter apply only to agriculture. The general industry requirements relating to formaldehyde have been moved to chapter 296-856 WAC, Formaldehyde. |
| Condition of use or formaldehyde concentration (ppm) |
Minimum respirator required1 |
| Up to 7.5 ppm (10 x PEL) . . . . . . . . . . . . |
Full facepiece with cartridges or canisters specifically approved for protection against formaldehyde2. |
| Up to 75 ppm (100 x PEL) . . . . . . . . . . . . |
Full-face mask with chin style or chest or back mounted type industrial size canister specifically approved for protection against formaldehyde. |
| Type C supplied-air respirator pressure demand or continuous flow type, with full facepiece, hood, or helmet. | |
| Above 75 ppm or unknown (emergencies) (100 x PEL) . . . . . . . . . . . . |
Self-contained breathing apparatus (SCBA) with positive-pressure full facepiece. |
| Combination supplied-air, full facepiece positive-pressure respirator with auxiliary self-contained air supply. | |
| Firefighting . . . . . . . . . . . . | SCBA with positive-pressure in full facepiece. |
| Escape . . . . . . . . . . . . | SCBA in demand or pressure demand mode. |
| Full-face mask with chin style or front or back mounted type industrial size canister specifically approved for protection against formaldehyde. |
| 1 | Respirators specified for use at higher concentrations may be
used at lower concentrations. |
| 2 | A half-mask respirator with cartridges specifically approved for protection against formaldehyde can be substituted for the full facepiece respirator providing that effective gas-proof goggles are provided and used in combination with the half-mask respirator. |