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
Hazards associated with drilled foundation activities. 1926.650, 1926.550(g)
Post closure operations and maintenance activities; training requirements of HAZWOPER. 1910.120
Interface of 1910.120 and other standards. 1910.120, 1910.38(a)
Bloodborne Pathogen standard as it applies to personal protective equipment. 1910.1030
Site observations and writing reports and findings at hazardous waste sites. 1910.120(e), 1910.120(a)
Progress in development of fall protection standards
Summer camps and conference/retreat centers and the bloodborne pathogens standard. 1910.1030
Excavation standards relating to aluminum rail. 1926.652
Transportation of compressed gas chambers 1926.350, 1926.800
Occupational exposure to bloodborne pathogens in the telecommunications industry. 1910.1030
Minimally acceptable levels of illumination; Resistor banks on overhead cranes; Overhead lines; Protective gloves on energized equipment. 1910.331, 1910.332, 1910.333, 1910.334, 1910.335
Work platforms on rough terrain fork trucks. 1926.451
Tuberculocidal disinfectant used to clean up blood or body fluids. 1910.1030
Workers' compensation or insurance claims and recordkeeping requirements. 1904 - Table of Contents
Why certain retailers are exempt from injury and illness recordkeeping. 1904 - Table of Contents
Pre-existing condition and/or specific event/exposure grey areas. 1904 - Table of Contents
Injury/illness at temporary duty location and recordkeeping requirement. 1904 - Table of Contents
Eating and drinking in area where potentially infectious material exists 1910.1030
Employment of individuals with disabilities.
Temporary storage carrier for oxygen and acetylene cylinders. 1910.253