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| # | Regulations |
|---|---|
| 1 | - - Respiratory protection. |
| # | Standard Interpretations |
|---|---|
| 1 | - 1910.134(a)(1) - Respirators for silica dust must be selected based on exposure levels. |
| 2 | - 1910.134(a)(1) - Hierarchy of air contaminant controls; respirators for emergencies. |
