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031-503-3002 (SL2) - Conduct Unmasking Procedures

Standards: Conducted unmasking procedures without incurring casualties.

Conditions:
Given a tactical situation and a group
of soldiers in mission-oriented protective
posture (MOPP) 4, an M256A1 chemical agent
detector kit or an M256A1 trainer kit, a
chemical agent monitor (CAM), M8/M9 detector
paper, an area where chemical agents have
been used, and one of the following
situations:

  1.  An
    M256A1 chemical agent detector kit is
    available.

  2.  An
    M256A1 is not available.

Standards:
Conducted unmasking procedures without
incurring casualties.

Performance
Steps

Note.  Before conducting unmasking procedures, make every
effort to confirm the absence of
chemical contamination. 
A CAM, an M256 chemical agent
detector kit, and M8/M9 detector paper
should be used along with a visual
check of the area.

Note.  The senior person present selects one or two
soldiers to unmask after permission is
received from higher headquarters.

1.   Conduct unmasking procedures using an M256A1
detector kit.

a.
Conduct unmasking
procedures in the shade.

b.
Use an M256A1 detector
kit to test for chemical agents. 
Use M8 detector paper to
check for possible liquid
contamination.  Continue unmasking procedures only if both tests are
negative.

c.
Direct the selected
soldiers to unmask for 5 minutes and
don, seal, and clear their masks.

d.
Observe the soldiers for
10 minutes for chemical agent
symptoms.

e.
Direct all soldiers to
unmask if no symptoms appear.

f. 
Check the soldiers for
delayed symptoms. 
Have first aid treatment
available.

g.
Complete steps 1a through
1f in sequence.

2.   Conduct unmasking procedures without using an
M256A1 detector kit.

a.
Conduct unmasking
procedures in the shade.

b.
Use M8 detector paper to
check for possible liquid
contamination. 
Continue unmasking procedures
only if the test is negative.

c.
Direct the selected
soldiers to take a deep breath,
break the seals of their masks
(keeping their eyes open) for 15
seconds, and seal and clear their
masks.

d.
Observe the soldiers for
10 minutes for chemical agent
symptoms.

e.
Direct the soldiers to
break the seals of their masks if no
symptoms appear, take two or three
breaths, and seal and clear their
masks.

f. 
Observe the soldiers for
10 minutes for symptoms.

g.
If no symptoms appear,
direct the soldiers to unmask for 5
minutes and don, seal, and clear
their masks.

h.
Observe the soldiers for
10 minutes for symptoms.

i.  
If no symptoms appear,
direct all soldiers to unmask.

j.  
Check the soldiers for
delayed symptoms. 
Have first aid treatment
available.

k.
Complete steps 2a through
2j in sequence.

3.   Report the absence of contamination in your area
and the successful completion of
unmasking procedures to higher
headquarters.

Evaluation
Preparation:

Setup:
Evaluate this task during a field exercise
or during a tactical training session. The
M256A1 trainer kit will be used for training
and evaluation purposes.

Brief
Soldier: Tell the soldier he will be
evaluated on his ability to conduct
unmasking procedures with and without the
use of a chemical agent detector kit. The
soldiers taking part in the process will act
only as directed by the soldier conducting
the unmasking exercise and will not be
evaluated on their performance.

Performance
Measures

GO

NO
GO

1.   Conducted unmasking procedures in sequence using an
M256A1 detector kit.

—

—

2.   Conducted unmasking procedures in sequence without
using an M256A1 detector kit.

—

—

3.   Reported the absence of contamination in the area
and the completion of unmasking
procedures to higher headquarters.

—

—

Evaluation
Guidance: Score the soldier GO if all
performance measures are passed. Score the
soldier NO GO if any performance measure is
failed. If the soldier fails, show him how
to do it correctly

References

 

Required

Related

 

FM
3-4

 

 

TM
3-6665-307-10

 


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