Appropriate surveillance shall be maintained of work area conditions and degree of employee exposure or stress. When there is a change in work area conditions or degree of employee exposure or stress that may affect respirator effectiveness, the employer shall reevaluate the continued effectiveness of the respirator.
If the employee detects vapor or gas breakthrough, changes in breathing resistance, or leakage of the facepiece, the employer must replace or repair the respirator before allowing the employee to return to the work area.
The employer shall ensure that employees leave the respirator use area:
To wash their faces and respirator facepieces as necessary to prevent eye or skin irritation associated with respirator use; or
If they detect vapor or gas breakthrough, changes in breathing resistance, or leakage of the facepiece; or
To replace the respirator or the filter, cartridge, or canister elements.