Standard Interpretations
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OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.
- 1926.1153 - Medical surveillance requirements in OSHA’s respirable crystalline silica standard for construction - 02/02/2018
- 1926.1153 - Retention of Spirometry Records - 09/18/2019
- 1926.1153 - Types of construction work excluded from the Silica standard - 07/25/2019
- 1926.1153(a) - Types of construction work excluded from the Silica standard - 07/25/2019
- 1926.1153(c)(1) - Handling and disposal of respirable silica dust, contaminated equipment, and filters from vacuums and PPE - 02/14/2022
- 1926.1153(c)(1) - Silica in Construction, Integrated Water Delivery System, Exposure Assessment, Medical Surveillance, Respiratory Protection - 03/04/2019
- 1926.1153(c)(1) - Types of construction work excluded from the Silica standard - 07/25/2019
- 1926.1153(d) - Types of construction work excluded from the Silica standard - 07/25/2019
- 1926.1153(d)(2) - Handling and disposal of respirable silica dust, contaminated equipment, and filters from vacuums and PPE - 02/14/2022
- 1926.1153(d)(2)(vi) - Silica in Construction, Integrated Water Delivery System, Exposure Assessment, Medical Surveillance, Respiratory Protection - 03/04/2019
- 1926.1153(e) - Types of construction work excluded from the Silica standard - 07/25/2019
- 1926.1153(e)(1) - Medical surveillance requirements in OSHA’s respirable crystalline silica standard for construction - 02/02/2018
- 1926.1153(e)(2) - Medical surveillance requirements in OSHA’s respirable crystalline silica standard for construction - 02/02/2018
- 1926.1153(f)(1) - A leaf blower should not be used to remove silica dust from clothing - 08/19/2020
- 1926.1153(f)(1) - Types of construction work excluded from the Silica standard - 07/25/2019
- 1926.1153(f)(2) - Handling and disposal of respirable silica dust, contaminated equipment, and filters from vacuums and PPE - 02/14/2022
- 1926.1153(h) - Types of construction work excluded from the Silica standard - 07/25/2019
- 1926.1153(h)(1)(i) - Medical surveillance requirements in OSHA’s respirable crystalline silica standard for construction - 02/02/2018
- 1926.1153(h)(1)(i) - Silica in Construction, Integrated Water Delivery System, Exposure Assessment, Medical Surveillance, Respiratory Protection - 03/04/2019
- 1926.1153(h)(2) - Medical surveillance requirements in OSHA’s respirable crystalline silica standard for construction - 02/02/2018
- 1926.1153(h)(2)(iv) - Who can perform a pulmonary function test (PFT) in compliance with the Respirable Crystalline Silica Standards? - 07/30/2018
- 1926.1153(h)(6) - Retention of Spirometry Records - 09/18/2019
- 1926.1153(i) - Types of construction work excluded from the Silica standard - 07/25/2019
- 1926.1153(i)(2)(i)(A) - Medical surveillance requirements in OSHA’s respirable crystalline silica standard for construction - 02/02/2018
- 1926.1153(i)(2)(i)(F) - Medical surveillance requirements in OSHA’s respirable crystalline silica standard for construction - 02/02/2018
- 1926.1153(j)(1) - Use of sampling devices that meet the ISO/CEN particle-size-selective criteria for respirable crystalline silica sampling - 12/18/2017