Document: 10 CFR Part 20
Document ID: f899860c-1afc-494c-8665-8b5ccf40104f
Document Type: cfr
Title: Use of individual respiratory protection equipment.
Source: 10 CFR Part 20
Source URL: https://www.ecfr.gov/current/title-10/part-20/section-20.1703
Revision Date: 
Chapter: 
Section ID: 20.1703
CFR Part: 20
CFR Title: 10

Content:
l protective equipment are used from which an unaided individual would have difficulty extricating himself or herself. The standby persons must be equipped with respiratory protection devices or other apparatus appropriate for the potential hazards. The standby rescue persons shall observe or otherwise maintain continuous communication with the workers (visual, voice, signal line, telephone, radio, or other suitable means), and be immediately available to assist them in case of a failure of the air supply or for any other reason that requires relief from distress. A sufficient number of standby rescue persons must be immediately available to assist all users of this type of equipment and to provide effective emergency rescue if needed. ( g ) Atmosphere-supplying respirators must be supplied with respirable air of grade D quality or better as defined by the Compressed Gas Association in publication G-7.1, “Commodity Specification for Air,” 1997 and included in the regulations of the Occupational Safety and Health Administration ( 29 CFR 1910.134(i)(1)(ii)(A) through (E) ). Grade D quality air criteria include— ( 1 ) Oxygen content (v/v) of 19.5-23.5%; ( 2 ) Hydrocarbon (condensed) content of 5 milligrams per cubic meter of air or less; ( 3 ) Carbon monoxide (CO) content of 10 ppm or less; ( 4 ) Carbon dioxide content of 1,000 ppm or less; and ( 5 ) Lack of noticeable odor. ( h ) The licensee shall ensure that no objects, materials or substances, such as facial hair, or any conditions that interfere with the face—facepiece seal or valve function, and that are under the control of the respirator wearer, are present between the skin of the wearer's face and the sealing surface of a tight-fitting respirator facepiece. ( i ) In estimating the dose to individuals from intake of airborne radioactive materials, the concentration of radioactive material in the air that is inhaled when respirators are worn is initially assumed to be the ambient concentration in air