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
03/31/1994	Standard requirements for eyewash and shower equipment, personnel and other protective equipment and air circulation fans, used in an automotive battery charging area	1910.132, 1910.133, 1910.151, 1910.178, 1910.303, 1910.307
03/31/1994	Hazard Communication Standard (HCS) requirements.	1910.1200
03/31/1994	Highly Hazardous Chemicals standard, Tertiary Butyl Hydroperoxide (TBHP).	1910.119
03/31/1994	Secondary container for a specimen.	1910.1030
03/28/1994	Proper procedures for stacking materials at construction sites.	1910.176, 1926.250
03/28/1994	Safety Procedures During Gunite and Shotcrete Pool Construction.	1926.652
03/25/1994	OSHA does not certify first aid training programs, instructors or trainees.	1910.151
03/24/1994	Clarification of occupational illness for OSHA 200 log.	1904 - Table of Contents
03/24/1994	Parking facilities are not considered part of an employer's premises for OSHA recordkeeping purposes.	1904 - Table of Contents
03/23/1994	Reinforcing steel of any diameter and any length must be guarded.	1926.701(b)
03/21/1994	Highly Hazardous Chemicals, hydrochloric acid.	1910.119
03/18/1994	Stair units manufactured to be used as an integral part of the welded frame scaffolds system.	1926 Subpart X
03/18/1994	Removal from service criteria for wire rope slings.	1910.184
03/18/1994	Permit-Required Confined Spaces standard.	1910.146
03/16/1994	Highly Hazardous Chemicals as it applies to flammable liquid from a stationary tank.	1910.119
03/10/1994	Highly Hazardous Chemicals as it applies to a covered process.	1910.119
03/10/1994	OSHACT cannot directly protect employees of State and local governments.	1975.5
03/09/1994	Highly Hazardous Chemicals as it applies to operating procedures and certify on an annual basis.	1910.119
03/04/1994	NIOSH Respirator User Notice.
03/03/1994	Mechanical equipment, such as an unguarded agitator, posing a hazard within a permit space must be locked out or tagged.	1910.146, 1910.147