Letters of Interpretation

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.

These letters of interpretation and the standards they address may not apply to OSHA State Plans. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or additional requirements. Please see OSHA-approved State Plans for more information.

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Date Title Standard Number
Interim interpertation concerning Type-CE respirators used in abrasive blasting that are manufactured by the E.D. Bullard Company, Models 77 and 88. 1926.62
Clarification of the Electric Power Generation, Transmission and Distribution Standard. 1910.269
The OSHA Hazardous Waste Operations and Emergency Response (HAZWOPER) regulation. 1910.120
Intravenous (IV) drug administration. 1910.1030
The Lockout/Tagout Standard. 1910.147
The frequency of the load measuring system when testing fall arrest equipment should be set at 500 Hz. 1926.500, 1926.501, 1926.502, 1926.503
Evaluation of raw sewage as regulated waste; product label compliance with the bloodborne pathogens standard. 1910.1030, 1910.1030(g)(1)(i)
Requirements for PRCS attendants; Fall arrest system anchorage point 1910.146(c)(5), 1910.146(c)(7), 1910.146(i), 1926.502(d)(15)
Review of a Guard Rail System for compliance with OSHA standards.
Which OSHA standards, general industry or construction, does the sign industry fall under. 1910.12
Storage of Chest X-Rays on Digitized Film. 1910.1020
Clarification of the electric power generation, transmission, and distribution standard 1910.269
OSHA injury and illness recordkeeping requirements. 1904 - Table of Contents
Several fall protection issues relating to scissors lifts and aerial lifts. 1926.453
OSHA standard addressing radio anti-two-block systems on cranes.
Batch digester safety in the paper industry. 1910.261
Recording injuries and illnesses associated with voluntary blood drives on the OSHA Log and Summary of Occupational Injudies and Illnesses. 1904 - Table of Contents
OSHA injury and illness recordkeeping requirements. 1904 - Table of Contents
Chlorine storage facility plan and the applicability of the Process Safety Management (PSM) of Highly Hazardous Chemicals Standard. 1910.119
Lockout/Tagout Citations Against the USDA. 1910.147