INTRODUCTION
EXPOSURE LIMITS
A listing of acceptable exposure limits from the following
sources is provided in MSA’s
Response
®
Respirator
Selector
:
-
American Conference of Governmental Industrial
Hygienists (ACGIH)
-
Occupational Safety and Health Administration
(OSHA)
-
National Institute for Occupational Safety and Health
(NIOSH)
-
American Industrial Hygiene Association (AIHA)
Contact MSA at 1-800-MSA-2222 for information.
Exposure Limits for Mixtures
The American Conference of Governmental Industrial
Hygienists (ACGIH) publishes the following information to
determine the TLV of a mixture.
First determine the total concentration of the chemical
mixture (CMixture) from the individual contaminant con-
centrations (C1, C2, C3, . . . ) using the following formula:
CMixture=C1+C2+ C3+ . . .
The TLV of the mixture is found by using the following for-
mula where T1, T2, T3, . . . are the individual contaminant
TLVs and C1, C2, C3, . . . are the individual contaminant
concentrations:
Only use these equations if the contaminants present are
actually mixed. Some substances do not mix and may be
present separately, for example, in pockets or at different
levels. In that case, the lowest TLV of the substances pre-
sent must be used to determine the appropriate respirator
category for protection against all contaminants present.
See MSA’s
Response Respirator Selector
for additional
information.
RESPIRATOR FIT TESTS
A qualitative or quantitative respirator fit test should be
carried out for each wearer of this respirator to determine
the amount of protection it will provide. Respirator fit tests
are explained fully in the
American National Standard for
Respiratory Protection
, ANSI Z88.2, which is published by
the American National Standards Institute, 11 West 42nd
Street, New York, New York 10036.
Quantitative Fit Test
If a quantitative fit test is used, a fit factor that is at least
100 shall be obtained before that respirator is assigned to
an individual.
Qualitative Fit Test
If a qualitative test is used, only validated protocols are
acceptable. The individual must pass a test designed to
assess a fit factor of 100.
Powered Air-Purifying Respirators (PAPR) should be quali-
tatively or quantitatively fit tested in a negative-pressure
mode (with blower off). This will cover use of the respira-
tor in the powered air-purifying mode of operation.
IMPORTANT INFORMATION CONCERNING THE RES-
PIRATORY PROTECTION PROGRAM
1. An adequate respiratory protection program must
include knowledge of hazards, hazard assessment,
selection of proper respiratory protective equipment,
instruction and training in the use of equipment,
inspection and maintenance of equipment, and med-
ical surveillance. [See OSHA regulations, Title 29 CFR,
Part 1910.134].
2. This respirator will perform as designed only if used and
maintained according to the manufacturer's instruc-
tions. The Program Administrator and the users must
read and understand these instructions before trying to
use or service this product. MSA encourages its cus-
tomers to write or call for a demonstration or any addi-
tional information on this product before using it.
4
TAL 804 (L) Rev. 17 - 490883
T
Mixture
=
C
Mixture
+
+
+ . . .
T
1
T
2
T
3
C
1
C
2
C
3
Summary of Contents for OptimAir 6A
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Page 30: ...OPTIMAIR 6A PAPR WITH COMFO ELITE FACEPIECE 30 TAL 804 L Rev 17 490883...
Page 37: ...20 37 TAL 804 L Rev 17 490883...
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