| # | Letters of Interpretation |
|---|---|
| 1 | - 1910.1020(c)(13) - Retention of atmospheric monitoring records for a permit-required confined space |
| 2 | - 1910.1020(c)(13) - Clarification of "trade secret" and the employer's obligation to provide genetic coding information. |
| 3 | - 1910.1020(c)(13) - Record retention requirements for indoor air quality documents and reports |
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