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
11/07/1991	Definition of "actual field experience" in Hazwoper.	1910.120
11/06/1991	OSHA citations issued against Phillips 66 Company.	2200.100
11/05/1991	Load Chart Posting and Visibility Requirements for Mobile Cranes	1910.180, 1926.550
11/05/1991	Yellow shall be the basic color for designation caution.	1910.144
11/05/1991	Safety of employees in the workplace where portable generators are used as power sources.	1910.302
11/05/1991	Rollover Protective Structures (ROPS) used on agricultural wheeled tractors.	1928.51
11/01/1991	Hearing report on OSHA reform.
10/31/1991	The terminology "making contact with the interior leg casing" in CPL 02-01-004 and grain handling facilities with less than one million bushels permanent storage capacity	1910.272(p)(4)(ii)
10/31/1991	Field Sanitation Standard.	1928.110
10/29/1991	Stacking trench boxes in trenches.	1926.650
10/29/1991	Noise and potential hazard of backup alarms on equipment at construction sites.	1926.601(b)(4), 1926.602(a)(9)
10/25/1991	Differences between the various standards for Rollover Protective Structures used on agricultural wheeled tractors.	1928.51(b)(1), 1926.1002(a)(5), 1926.1002(j)(1)
10/22/1991	The role of self-audits in safety and health programs	1926.20(b)(2)
10/21/1991	Continued enforcement of Lockout/Tagout Standard	1910.147
10/16/1991	Ergonomics in the Baking Industry.
10/16/1991	8 hour refresher training requirements.	1910.120
10/16/1991	Hazard Determinations under the HCS for Sodium Hypochlorite.	1910.1200(d), 1910.1200(g)(2)
10/15/1991	Changes to handling disputed debt collection cases
10/11/1991	Application of 1910.120 to home heating oil.	1910.120, 1910.120(q)(6), 1910.120(q)(6)(ii), 1910.120(q)(6)(iii)
10/08/1991	Over-the-road vehicle operator required response to a large release.	1910.120, 1910.120(q), 1910.120(q)(1), 1910.38

Letters of Interpretation

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