Letters of Interpretation | Occupational Safety and Health Administration

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
04/14/1993	Propane as a fuel for ovens; Chlorine storage exceeding 1500 pounds.	1910.119
04/14/1993	Respiratory protection as it relates to oil fields	1910.134
04/14/1993	Evaluation and use of radiofrequency protective clothing	1910.132
04/14/1993	HHCs as it applies to how high must the percentage of a chemical be to require compliance.	1910.119
04/13/1993	Albumin Human USP and the standard.	1910.1030
04/08/1993	Extension cord equipped with a built-in "continuity tester".	1910.304
04/06/1993	Use of overhead bridge and gantry cranes as work platforms.	1910.179
04/02/1993	Proper recording of a hepatitis A exposure for OSHA injury and illness recordkeeping purposes.	1904 - Table of Contents
04/02/1993	Frame grounding of arc welding machines.	1926.351
04/01/1993	Recording cases on the OSHA log that involve Bloodborne Pathogens.	1904 - Table of Contents
04/01/1993	Meeting labeling requirements of hazard communication standard for slag wool.	1910.1200(f)
03/30/1993	First Aid program requirements where a medical facility is near the workplace.	1910.151
03/26/1993	Platforms and ladders on communication towers.	1910.23, 1910.27
03/25/1993	Recording TB related cases on the OSHA 200 log.	1904 - Table of Contents
03/25/1993	OSHA jurisdiction over employees working in an Indian reservation clinic.	1975.4(b)(3)
03/25/1993	Variance request on conditions surrounding a citation under litigation.	1926.556
03/24/1993	Health and safety plans for hazardous waste operations & emergency response.	1910.120
03/24/1993	Request for approval of guardrail system.	1926.500
03/23/1993	Construction industry general duty clause, and the bloodborne pathogens standard.	1910.1030
03/22/1993	Operation and maintenance of railway cranes.