| # | Letters of Interpretation |
|---|---|
| 1 | - 1926.1153(h)(2)(iv) - Who can perform a pulmonary function test (PFT) in compliance with the Respirable Crystalline Silica Standards? |
| 2 | - 1926.1153(h)(2) - Medical surveillance requirements in OSHA’s respirable crystalline silica standard for construction |
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