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.

Date	Title	Standard Number
01/03/1991	QC Labs conduct physicochemical analyses with no altering relating to Quality Control	1910.1450
12/28/1990	"Brett-Guard" style blade guard meets hand-fed ripsaw requirements	1910.213(c)
12/28/1990	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)
12/28/1990	Applicability of 1910.120 to the Uranium Mill Tailings Remedial Action Project	1910.120(a)(1)(i)
12/21/1990	Potential release of hazardous substances from heat shrink products	1910.1200(b)(2)
12/21/1990	Application of 1910.120 to general industry with potential for hazardous substance emergencies	1910.120(a)(2)(iii)
12/21/1990	Jurisdiction over tanks of malodorant gas.	1975.1
12/21/1990	Protective equipment for firefighters engaged in aircraft crash and rescue operations.	1910.156(e), 1910.120(q)(3)(iii), 1910.156
12/19/1990	The Medic First Aid program.	1910.151(b), 1910.410
12/19/1990	Debt Collection Charges: January 1, 1991 through December 31, 1991
12/14/1990	Hazwoper's application to general industry.	1910.38(a), 1910.120
12/12/1990	Lead Standard medical removal requirements and blood lead level testing	1910.1025(j)(2)(ii), 1910.1025(k)(1)(i)
12/11/1990	Cleaning petroleum storage tanks located in tank terminals and refineries.	1910.120
12/06/1990	Material safety data sheets (MSDSs) under the Hazard Communication Standard.	1910.1200
12/06/1990	Adjusting cotton dust permissible exposure limits (PELs) for extended work shifts.	1910.1043
11/29/1990	Training for 1910.120 to be specific to responder's needs.	1910.120, 1910.121
11/28/1990	Information from (OSHA) Pamphlet 3000.	1903.14, 1903.20
11/27/1990	Employee exposure to consumer products.	1910.1200
11/26/1990	Clarification of the "Occupational Exposure to Hazardous Chemicals in Laboratories" regulations regarding a Physician's written opinion	1910.1450
11/26/1990	Hazwoper does not require training for employees not involved or exposed to hazardous waste areas.	1910.120

Letters of Interpretation

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