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.

Filters


Date Title Standard Number
Clarification on combining hazard statements on labels under the hazard communication standard 1910.1200, 1910.1200 App C
Bulk asbestos analysis and worker air exposures to less than 1% asbestos 1910.1001(j)(8), 1915.1001(k)(5), 1926.1101(k)(5)
Dust wipe sampling is not required to prove surfaces are as free as practicable 1910.1026(i), 1910.1026(i)(4)(i)
Posting OSHA Required Notices[1903.2(a)(1)] 1903.2(a)(1)
Determining work-relatedness for injuries while on travel status 1904 - Table of Contents, 1904.5
Prescription medications, including preventive antibiotics, are considered medical treatment and are recordable. 1904 - Table of Contents, 1904.7
Regarding Assembly/Disassembly and set-up used in Cranes and Derricks in Construction Standard 1926.1403, 1926.1404, 1926.1405, 1926.1406
Use of an x-ray fluorescence analyzer (XRF) as a field screening tool for lead 1926.62(d)(1)(iii)
Electronic Certification of Training 1910.147, 1915 - Table of Contents, 1917 - Table of Contents, 1918 - Table of Contents, 1926 - Table of Contents, 1928 - Table of Contents, 1960 - Table of Contents
Occupational Noise Exposure - The use of hearing aids as hearing protection devices. 1910.95(j)(1)
Clarification on whether a Registered Nurse can act as a licensed health care professional for purposes of conducting a respiratory protection medical evaluation 1910.134(e)(2)(i)
Impalement protection from protruding reinforcing steel and 250-pound drop test. 1926.701(b)
Spacing of the posts in between modular guardrail system sections. 1926.502(b)(3), 1910.23(e)(3)
Determining work-relatedness for pre-existing condition. 1904 - Table of Contents, 1904.5
The use of hard hats while working on roofs in hot weather 1910.132(d), 1910.135, 1926.100
Extended and Unusual Work Shifts
Acceptability of Using Web Based Electrical Training 1910.332(c)
Permit-Required Confined Space Entry Requirements For IDLH and Non-IDLH Spaces 1910.146(b), 1910.146(k)(1)(i), 1910.134, 1910.134(g)(3)
Fall protection requirements while working from an elevated location above four feet. 1910.269(g)(2)(iii), 1910.269(g)(2)(iv), 1910.269(g)(2)(iv)(C)(2), 1910.269(g)(2)(iv)(C)(3)
Policy Background on the Temporary Worker Initiative Posted 1910 - Table of Contents, 1915 - Table of Contents, 1917 - Table of Contents, 1918 - Table of Contents, 1919 - Table of Contents, 1926 - Table of Contents, 1928 - Table of Contents, 1960 - Table of Contents