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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How to Request a Letter of Interpretation

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Date Title Standard Number
Hatch Net 120 fall protection system 1910.23(a)(3), 1910.23(a)(8), 1918.31, 1926.501(b)(4)
The requirements for disinfection as referenced in CPL 2-2.44C, the Directive for Bloodborne Pathogens Standard. 1910.1030
Boat captain be considered the employer of divers if the captian had the power to exercise control over the divers. 1905.11, 1910 Subpart T
Policy on fall protection in steel erection.
Vessel Safety - OSHA or U.S. Coast Guard. 1919.1
Retest of audiogram for hearing loss. 1904 - Table of Contents
Ergonomic problems and recordkeeping issues. 1904 - Table of Contents
Recording hearing loss on the OSHA 200 log. 1904 - Table of Contents
Whether containers which meet the criteria of the U.S. Department of Transportation Infectious Substance Regulations. 1910.1030
Highly Hazardous Chemicals, hydrocarbon fuels. 1910.119
Wet floors due to weather conditions or the entry of vehicles containing melting snow. 1910.22
The wearing of gloves during routine vena punctures. 1910.1030
Washington Inspection Procedures for Enforcing Excavation Standards.
Highly Hazardous Chemicals standard, Tertiary Butyl Hydroperoxide (TBHP). 1910.119
Secondary container for a specimen. 1910.1030
Hazard Communication Standard (HCS) requirements. 1910.1200
Standard requirements for eyewash and shower equipment, personnel and other protective equipment and air circulation fans, used in an automotive battery charging area 1910.132, 1910.133, 1910.151, 1910.178, 1910.303, 1910.307
Toeboard requirements on walkways over interior of a water tank. 1910.23
Manually operated winch and tripod system used for raising, lowering and supporting employees. 1910.28, 1926 Subpart L
Medical Services and First Aid. 1910.151