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
10/29/1998	Apparel requirements for line-clearence tree-trimmers	1910.269
10/26/1998	Successor liability for employee exposure and medical records.	1910.1020(c)(7), 1910.1020(h)
10/26/1998	Worker exposure to tobacco smoke.	1910.1000
10/20/1998	Application of 1910.147 to the change out of a grinding wheel.	1910.147(a)(2)(ii), 1910.147(a)(2)(iii)(A)
10/16/1998	Validity of Illustrations in the Confined Space Standard Appendices.	1910.146 App C, 1910.146 App D, 1910.146 App E
10/16/1998	Conduct of respiratory protection medical evaluations by medical technicians.	1910.134, 1910.134(e)(2)(i)
10/16/1998	Health care professional's discretion regarding medical evaluations and exams.	1910.134(e)
10/16/1998	Questions and answers regarding the respiratory protection standard	1910.134
10/15/1998	Difference between "grain elevators" and "grain handling facilities"	1910.272(j)
10/13/1998	Respiratory protection for work on dichlorobenzidine (DCP) contaminated equipment.	1910.1003(c)(5)(i)
10/13/1998	Using the telephone to back-up eletronic access to MSDSs.	1910.1200(g)(8)
10/13/1998	Definition of a mixture under the Hazard Communication standard.	1910.1200(c)
10/13/1998	"Representative sampling" provisions of the Methylene Chloride standard.	1910.1052(d)(1)(ii)
10/13/1998	Respiratory Protection Standard: Interim Enforcement Policy.	1910.134, 1926.103
10/09/1998	Requirements for machine guarding of screw machines.	1910.212(a)
10/05/1998	Medical evaluation requirements under the respiratory protection standard	1910.134(c), 1910.134(e)
10/05/1998	Bloodborne Pathogens standard: Group purchasing agreements in healthcare facilities; engineering controls.	1910.1030
10/01/1998	Applicable standards for Below-the-Hook Lifting Devices and slings.	1910.184
10/01/1998	Powered platforms: Suspension height limits for transportable outriggers.	1910.66(f)(3)(ii), 1910.66(e)(2)
09/22/1998	All exterior openings/doors of temporary labor housing must be screened.	1910.142(b)(8)

Letters of Interpretation

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