OSHA’s respirable crystalline silica standard for construction (29 CFR 1926.1153) lets you skip air monitoring if you fully follow Table 1: a specified dust control and respirator for each task. Pick your task to see the required control. The PEL is 50 µg/m³ (8-hr TWA); the action level is 25 µg/m³.
Respiratory protection for silica
FAQ
What if my task isn’t on Table 1?
Then you must use the “alternative exposure control” path: assess exposures, keep them below the 50 µg/m³ PEL, and provide respirators based on the measured level.
Does a dust mask count?
For silica you need a NIOSH-certified respirator (at least N95 / APF 10), fit-tested, with a written respiratory protection program — not a loose nuisance dust mask.
Simplified summary of OSHA 1926.1153 Table 1 for common tasks. Exact respirator requirements vary by duration (≤4 hr vs >4 hr) and indoor/outdoor use — confirm against the full Table 1 text. General-industry silica is covered by 1910.1053. Not a substitute for a compliant exposure control plan and competent person.
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Built and reviewed by the WC Safety editorial team (Steven Eaton). We curate and review industrial PPE against ANSI, NIOSH and OSHA standards.