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 Standard Number
Applicability of OSHA's Hazard Communication Standard for truck drivers hauling waste products that are exempt by EPA 10 1910.1200(b)(2), 1910.1200(b)(6)(i), 1910.1200(b)(6)(xi), 1910.1200(c), 1910.1200(h)(1), 1910.1200(h)(2), 1910.1200(h)(3), 1910.1200(h)(3)(ii), 1910.1200(h)(3)(iii), 1910.1096(i)(2)
Acceptable use of pictograms on chemical labels under the revised Hazard Communication standard 3 1910.1200(f)(1), 1910.1200(f)(1)(iv), 1910.1200 App C
Clarification of the new reporting requirements contained in 1904.39. 2 1904 - Table of Contents, 1904.39
Use of Kinesiology tape is considered medical treatment beyond first-aid. 2 1904 - Table of Contents, 1904.7(b)(5)(ii)(M)
Recordkeeping and maintenance of respirator medical evaluations 4 1910.134(e), 1910.1020(b), 1910.1020(c), 1910.1020(e)
Guidance on the Ammonium Nitrate Storage Requirements in 29 CFR 1910.109(i) 1 1910.109(i)
What is the correct grouping/placement of the six required elements for labels 2 1910.1200(f)(1), 1910.1200(f)(3)
OSHA Standards Applicable to Automotive Service Lifts 0
Clarification on cranes standard regarding railroad equipment controlling entity's duty to disclose known ground-condition hazards and about the process of communicating the location of subterranean hazards to operators. 1 1926.1402(c)(2)
Employer payment for personal protective equipment 5 1910.132, 1915.152, 1917.96, 1918.106, 1926.95
Labeling of secondary containers in laboratories under the Hazard Communication standard 4 1910.1200(b)(3), 1910.1450(a)(1), 1910.1450(b), 1910.1450(h)(1)(i)
Clarification on combining hazard statements on labels under the hazard communication standard 2 1910.1200, 1910.1200 App C
Dust wipe sampling is not required to prove surfaces are as free as practicable 2 1910.1026(i), 1910.1026(i)(4)(i)
Bulk asbestos analysis and worker air exposures to less than 1% asbestos 3 1910.1001(j)(8), 1915.1001(k)(5), 1926.1101(k)(5)
Posting OSHA Required Notices[1903.2(a)(1)] 1 1903.2(a)(1)
Prescription medications, including preventive antibiotics, are considered medical treatment and are recordable. 2 1904 - Table of Contents, 1904.7
Determining work-relatedness for injuries while on travel status 2 1904 - Table of Contents, 1904.5
Regarding Assembly/Disassembly and set-up used in Cranes and Derricks in Construction Standard 4 1926.1403, 1926.1404, 1926.1405, 1926.1406
Use of an x-ray fluorescence analyzer (XRF) as a field screening tool for lead 1 1926.62(d)(1)(iii)
Electronic Certification of Training 7 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