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of you contain water. One of these bottles also pared text from which the subject is to read
contains a small amount of banana oil. Be sure
the covers are on tight, then shake each bottle
for two seconds. Unscrew the lid of each bottle,
one at a time, and sniff at the mouth of the
bottle. Indicate to the test conductor which
bottle contains banana oil.”
(9) The mixtures used in the IAA odor detec-
tion test shall be prepared in an area separate
from where the test is performed, in order to
prevent olfactory fatigue in the subject.
(10) If the test subject is unable to correctly
identify the jar containing the odor test solu-
tion, the IAA qualitative fit test shall not be
performed.
(11) If the test subject correctly identifies the jar ercises. This would be an appropriate time to
containing the odor test solution, the test sub-
ject may proceed to respirator selection and fit
testing.
(b) Isoamyl Acetate Fit Test
(1) The fit test chamber shall be a clear 55-gal-
lon drum liner suspended inverted over a 2-
foot diameter frame so that the top of the
chamber is about 6 inches above the test
subject’s head. If no drum liner is available, a
similar chamber shall be constructed using
plastic sheeting. The inside top center of the
chamber shall have a small hook attached.
(2) Each respirator used for the fitting and fit
testing shall be equipped with organic vapor
cartridges or offer protection against organic
vapors.
(3) After selecting, donning, and properly ad-
justing a respirator, the test subject shall wear it testing. Odor sensitivity will usually have re-
to the fit testing room. This room shall be sepa-
rate from the room used for odor threshold
screening and respirator selection, and shall be
well-ventilated, as by an exhaust fan or lab
hood, to prevent general room contamination.
(4) A copy of the test exercises and any pre-
100
shall be taped to the inside of the test chamber.
(5) Upon entering the test chamber, the test
subject shall be given a 6-inch by 5-inch piece
of paper towel, or other porous, absorbent,
single-ply material, folded in half and wetted
with 0.75 ml of pure IAA. The test subject shall
hang the wet towel on the hook at the top of the
chamber. An IAA test swab or ampule may be
substituted for the IAA wetted paper towel
provided it has been demonstrated that the al-
ternative IAA source will generate an IAA test
atmosphere with a concentration equivalent to
that generated by the paper towel method.
(6) Allow two minutes for the IAA test concen-
tration to stabilize before starting the fit test ex-
talk with the test subject; to explain the fit test,
the importance of his/her cooperation, and the
purpose for the test exercises; or to demonstrate
some of the exercises.
(7) If at any time during the test, the subject de-
tects the banana-like odor of IAA, the test is
failed. The subject shall quickly exit from the
test chamber and leave the test area to avoid
olfactory fatigue.
(8) If the test is failed, the subject shall return
to the selection room and remove the respira-
tor. The test subject shall repeat the odor sen-
sitivity test, select and put on another
respirator, return to the test area and again
begin the fit test procedure described in (b) (1)
through (7) above. The process continues until
a respirator that fits well has been found.
Should the odor sensitivity test be failed, the
subject shall wait at least 5 minutes before re-
turned by this time.
(9) If the subject passes the test, the efficiency
of the test procedure shall be demonstrated by
having the subject break the respirator face
seal and take a breath before exiting the
chamber.