(i)(4)
* The employer shall ensure that cylinders used to supply breathing air to respirators meet the
following requirements:
(i)(4)(i)
* Cylinders are tested and maintained as prescribed in the Shipping Container Specification
Regulations of the Department of Transportation (49CFR part 173 and part 178),
(i)(4)(ii)
* Cylinders of purchased breathing air have a certificate of analysis from the supplier that the
breathing air meets the requirements for Grade D breathing air; and
(i)(4)(iii)
* The moisture content in the cylinder does not exceed a dew point of -50 degrees F (-45.6 deg
C) at 1 atmosphere pressure.
(i)(5)
* The employer shall ensure that compressors used to supply breathing air to respirators are
constructed and situated so as to:
(i)(5)(i)
* Prevent entry of contaminated air into the air supply system;
(i)(5)(ii)
* Minimize moisture content so that the dew point at 1 atmosphere pressure is 10 degrees F
(5.56 deg. C) below the ambient temperature;
(i)(5)(iii)
* Have suitable in-line air-purifying sorbent beds and filters to further ensure breathing air quality.
Sorbent beds and filters shall be maintained and replaced or refurbished periodically following
the manufacturer's instructions.
(i)(5)(iv)
* Have a tag containing the most recent change date and the signature of the person authorized
by the employer to perform the change. The tag shall be maintained at the compressor.
(i)(6)
* For compressors that are not oil-lubricated, the employer shall ensure that carbon monoxide
levels in the breathing air do not exceed 10 ppm.
(i)(7)
* For oil-lubricated compressors, the employer shall use a high-temperature or carbon monoxide
alarm, or both, to monitor carbon monoxide levels. If only high-temperature alarms are used, the
air supply shall be monitored at intervals sufficient to prevent carbon monoxide in the breathing
air from exceeding 10ppm.
(i)(8)
* The employer shall ensure that breathing air couplings are incompatible with outlets for non-
respirable worksite air or other gas systems. No asphyxiating substance shall be introduced into
breathing air lines.
34
Summary of Contents for Opti-Fit 9800-25
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