Panasonic PT-DZ12000U Operating Instructions Manual page 85

respiratory protection program requirements listed in Sec.
20.1703 apply. An assigned protection factor has not been
assigned for these devices. However, an APF equal to 10
may be used if the licensee can demonstrate a fit factor of at
least 100 by use of a validated or evaluated, qualitative or
quantitative fit test.
(e) Under-chin type only. No distinction is made in this
Appendix between elastomeric half-masks with replaceable
cartridges and those designed with the filter medium as an
integral part of the facepiece (e.g., disposable or reusable
disposable). Both types are acceptable so long as the seal
area of the latter contains some substantial type of seal-
enhancing material such as rubber or plastic, the two or more
suspension straps are adjustable, the filter medium is at least
95 percent efficient and all other requirements of this Part are
met.
(f) The assigned protection factors for gases and vapors are
not applicable to radioactive contaminants that present an
absorption or submersion hazard. For tritium oxide vapor,
approximately one-third of the intake occurs by absorption
through the skin so that an overall protection factor of 3 is
appropriate when atmosphere-supplying respirators are used
to protect against tritium oxide. Exposure to radioactive noble
gases is not considered a significant respiratory hazard, and
protective actions for these contaminants should be based on
external (submersion) dose considerations.
(g) No NIOSH approval schedule is currently available for
atmosphere supplying suits. This equipment may be used in
an acceptable respiratory protection program as long as all
the other minimum program requirements, with the exception
of fit testing, are met (i.e., Sec. 20.1703).