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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.

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

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

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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