| Airborne Concentration or Condition of Use | Required Respirator |
| < or = 10 ppm (parts per million) | Half-mask air-purifying respirator with organic vapor cartridge. |
| < or = 50 ppm | (1) Full-facepiece respirator with organic vapor cartridges; or (2) Full-facepiece gas mask with chin-style canisters*. |
OSHA allows the use of a half-mask,negative pressure respirator with air-purifying cartridges when airborne concentrations of benzene are 10 ppm or less. |
For all workers required to wear respirators for at least 30 days a year, the physical examination shall pay special attention to the cardiopulmonary system and ... |
A. Benzene exposure shall not exceed 1.0 part per million (ppm) unless respiratory protection is used in accordance with the Respiratory Protection Policy. B. ... |
NIOSH: The recommended airborne exposure limit (REL) is. 0.1 ppm averaged over a 10-hour workshift and. 1 ppm, not to be exceeded during any 15-minute work ... |
(E) For all workers required to wear respirators for at least 30 days a year, the physical examination shall pay special attention to the cardiopulmonary system ... |
Benzene. H2S. Not Determined. REQUIRED. For determining unknown concentrations of contaminants, use supplied-air respirators (SCBA or airline w/5 min. escape ... |
(E) Employers shall ensure that canisters used with non-powered air purifying respirators have a minimum service life of (4) hours when tested at 150 ppm ... |
OSHA currently requires in 29 CFR 1910.1028 that workers be provided with and required to wear and use the “most protective” respirators in concentrations ... |
20 сент. 2023 г. · In this instance they should be looking at the 1ppm to the 3-hr duration and determine that they should wear a Half-Face mask. |
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