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
Decision in The Hardaway Co. v. Dole Case. 1910.132(a)
Laboratory Standard's application in testing building products 1910.1200, 1910.1450
Barge loading equipment. 1918 - Table of Contents, 1918.13
Applicability of the OSHA Laboratory Standard to laboratories within the electric utility industry. 1910.1200, 1910.1450
Clarification of Standards 1926 Subpart P, 1926.651, 1926.652
Point of operation guarding for the AMPOMATOR CLS II Wire Terminal Machine 1910.212(a)
Use of loss control reports prepared by an insurance company for its policyholders, will create a detrimental relationship between the company and the policyholders 1903.3
QC Labs conduct physicochemical analyses with no altering relating to Quality Control 1910.1450
Employees as qualified to inspect ovens in satisfaction on the requirements of the 29 CFR 1910.263(i)(9)(ii). 1910.263(l)(9)(ii)
"Brett-Guard" style blade guard meets hand-fed ripsaw requirements 1910.213(c)
Applicability of 1910.120 to the Uranium Mill Tailings Remedial Action Project 1910.120(a)(1)(i)
Protective equipment for firefighters engaged in aircraft crash and rescue operations. 1910.156(e), 1910.120(q)(3)(iii), 1910.156
Application of 1910.120 to general industry with potential for hazardous substance emergencies 1910.120(a)(2)(iii)
Potential release of hazardous substances from heat shrink products 1910.1200(b)(2)
Jurisdiction over tanks of malodorant gas. 1975.1
The Medic First Aid program. 1910.151(b), 1910.410
Debt Collection Charges: January 1, 1991 through December 31, 1991
Hazwoper's application to general industry. 1910.38(a), 1910.120
Lead Standard medical removal requirements and blood lead level testing 1910.1025(j)(2)(ii), 1910.1025(k)(1)(i)
Cleaning petroleum storage tanks located in tank terminals and refineries. 1910.120