![]() ![]() It cannot be cleaned and disinfected according to the method described in Appendix B-2. ![]() Response: The N95 filtering facepiece respirator is a "disposable respirator." It must be discarded after use, or when it becomes damaged or soiled. Question 7: If OSHA considers the N95 filtering facepiece a respirator covered by the respiratory protection standard, what parts of paragraph (h) involving "maintenance and care of respirators" are applicable? Does the employer have to comply with Appendix B-2 involving "Respirator Cleaning Procedures"? The employer also must provide the information in Appendix D to each voluntary wearer. The employer must determine that such respirator use will not in itself create a hazard (i.e., by ensuring that masks are not used if dirty or contaminated, and that their use does not interfere with the employee's ability to work safely). Response: If the employer allows employees to voluntarily use filtering facepiece respirators, the employer must follow the appropriate provisions in (c)(2). Question 6: Which provisions of the respiratory protection standard must be followed when an N95 filtering facepiece respirator is voluntarily used? Response: Yes according to the exception, if the employer allows N95 filtering facepiece respirators to be voluntarily used by employees in areas that have no respiratory hazards, the employer is not required to include these employees in a written respiratory protection program. Question 5: In a situation where an employee is working in an area with minor dust exposure, where no respiratory hazards exist, and where an employee is voluntarily using an N95 filtering facepiece respirator, does this use fall within the scope of the exception provided in paragraph 1910.134(c)(2)(ii)? If the filter is an integral part of the facepiece, or the entire facepiece composed of the filtering medium, the respirator is also considered a filtering facepiece respirator. Response: An N95 respirator is an air-purifying negative pressure respirator equipped with an N95 filter. Question 4: Is an N95 respirator a filtering facepiece respirator, or is it either a demand respirator or a negative pressure respirator? A "negative pressure respirator" is any respirator in which the air pressure inside the facepiece is negative during inhalation with respect to the ambient air pressure outside the respirator. ![]() 134(b), is an atmosphere-supplying respirator that admits breathing air only when a negative pressure is created in the facepiece by inhalation. Response: A "demand respirator," as defined in. Question 3: What is the difference between a "demand respirator" and a "negative pressure respirator"? It is considered to be in the same category as an elastomeric half-mask respirator, and both respirators have an assigned protection factor (APF) of 10. Response: As stated above, a filtering facepiece is a negative pressure respirator. Question 2: How does OSHA differentiate between a filtering facepiece and a respirator? 134(b) as "a negative pressure particulate respirator with a filter as an integral part of the facepiece or with the entire facepiece composed of the filtering medium." Response: A filtering facepiece respirator is defined in. Question 1: How does OSHA define a filtering facepiece/dust mask? This letter constitutes OSHA's interpretation only of the requirements discussed, and may not be applicable to any question not delineated in your original correspondence. Each of your questions has been paraphrased below, followed by our response. Thank you for your letter of April 11, 2011, to the Occupational Safety and Health Administration (OSHA) requesting clarification on several provisions in OSHA's respiratory protection standard. ![]()
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