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React to Chemical or Biological (CB) Hazard/Attack
Conditions: You are in a tactical environment where the threat of an attack or exposure to chemical or biological agents (toxic industrial or conventional warfare) is
high. You are given mission-oriented protective posture (MOPP) gear, individual decontamination kits, and M8 and M9 chemical agent detector paper. You may also
be given eye protection, an Army Combat Helmet (ACH), an Improved Outer Tactical Vest (IOTV), and Deltoid Axillary Protectors (DAPs). You are currently in MOPP 0,
and one of the following automatic-masking situations occurs:
1. A chemical alarm sounds.
2. A positive reading is obtained on detector paper.
3. Individuals exhibit symptoms of CB agent poisoning, such as difficulty breathing, coughing, wheezing, vomiting, or eye irritation.
4. You observe a spill or cloud of unknown material(s).
5. You react to an improvised explosive device (IED) explosion where you suspect the release of a CB agent.
6. You observe a contamination marker.
7. Your supervisor orders you to mask.
8. You observe personnel wearing protective masks.
9. You observe other signs of a possible CB agent hazard/attack.
Standards: React to a CB agent hazard or attack without becoming a casualty. Don your protective mask within 9 seconds. Notify your supervisor of identified or
possible contamination. Start the steps to decontaminate yourself within 1 minute of finding contamination. After completely decontaminating yourself, assume
MOPP 4 unless directed to a lower MOPP level. Decontaminate your individual equipment using the decontaminating kit, as necessary, and continue mission.
1. Identify the CB hazard automatic-masking criteria.
a. Don your protective mask automatically when any of the following situations occur:
(1) A chemical alarm sounds.
(2) A positive reading is obtained on detector paper.
(3) Individuals exhibit symptoms of CB agent poisoning, such as difficulty breathing, coughing, wheezing, vomiting, or eye irritation.
(4) You observe a spill or cloud of unknown material(s).
(5) You react to an IED explosion where you suspect the release of a CB agent.
(6) You observe a contamination marker.
(7) Your supervisor orders you to mask.
(8) You observe personnel wearing protective masks.
(9) You observe other signs of a possible CB agent hazard/attack. .
b. Respond to the commander's policy of automatic masking.
NOTE: Commanders at all levels may establish a modified policy by designating additional criteria for automatic masking.
2. Protect yourself from CB contamination by using your assigned protective mask without fastening the hood.
NOTE: The mask provides protection against conventional warfare agents, the mask will provide little if any protection from Toxic Industrial Materials (TIMs), but it
provides the best available protection to enable you to evacuate the hazard area. You may be required to evacuate to a minimum safe distance of at least 300
meters upwind from the contamination (if possible) or as directed by the commander.
3. Give the alarm.
a. Shout, "Gas, Gas, Gas."
b. Give the appropriate hand-and-arm signal.
c. Hit two metal objects together.
4. Take cover and/or assemble as directed, moving at least 300 meters upwind from the suspected contamination area to reduce exposure.
5. Decontaminate exposed skin using the individual decontaminating kit as necessary.
6. Cover all exposed skin and assume MOPP 4 as directed.
NOTE: This step is graded only if MOPP is available.
NOTE: If you are wearing an ACH, IOTV, or DAPs, proceed to performance step 6e.
a. Don the overgarment trousers.
b. Don the overgarment coat.
c. Don the overboots.
NOTE: Combat boots provide limited protection. Cover them as soon as possible because they absorb chemicals. It takes a long time to put on the overboots; in an
emergency, put them on last.
d. Don the protective gloves.
NOTE: Perform performance steps 6e through 6k only if wearing ACH, IOTV, or DAPs.
e. Remove the ACH and protective eyewear.
f. Loosen the DAP.
g. Remove the IOTV by opening the medical access hook and pile closure and loosening the left shoulder adjustment strap.
WARNING: WHEN REMOVING THE IOTV OVER THE HEAD. TAKE CARE NOT TO SNAG THE FILTER CANISTER AND BREAK THE SEAL OF YOUR PROTECTIVE
h. Perform performance steps 6a through 6d, and then proceed to performance step 6i.
i. Don the IOTV by tightening the left shoulder adjustment strap and fastening the medical access hook and pile closure.
j. Secure the DAP
k. Don the ACH.
7. Decontaminate your individual equipment using your individual equipment decontamination kit, as necessary.
8. Notify your supervisor of any suspected CB hazard/attack.
9. Continue the mission and perform any additional requirements as outlined in your unit's standing operating procedure (SOP).
1. Use all means of CB detection to check your surrounding area for the presence of contamination.
2. Contact your higher headquarters (HQ) if you find contamination or if you determine that the attack was non-CB related.
3. Await further guidance. The higher HQ contacts all adjacent/attached units to check the status of CB contamination in their areas. All units will report the absence
or presence of contamination to the chain of command.
4. Annotate the above actions on your duty log (Department of the Army [DA] Form 1594) [Daily Staff Journal or Duty Officer's Log]).
Evaluation Preparation: Setup: A good time to evaluate this task is during a field exercise when a variety of CB hazards on can be simulated. Select a site with
adequate cover, and ensure that Soldiers have their assigned protective mask.
Brief Soldier: Tell the Soldier that there will be an encounter with simulated CB agents and/or a CB alarm will be given.
Performance Measures GO NO-GO
1. Identified automatic-masking criteria. —— ——
2. Donned protective mask without fastening the hood within 9 seconds. —— ——
3. Gave the alarm. —— ——
4. Took cover and/or assembled as directed. Moved at least 300 meters upwind from the suspected contamination area
to reduce exposure.
NOTE: The Soldier is evaluated on decontaminating him or herself. The actual conduct of decontamination is evaluated in task 031-503-1013.
5. Decontaminated exposed skin as necessary within 1 minute of finding the contamination.
NOTE: The Soldier evaluated on assuming MOPP 4. The actual donning of MOPP gear is evaluated in task 031-503-1040.
6. Covered all exposed skin and assumed MOPP 4 as directed. —— ——
7. Decontaminated individual equipment as necessary. —— ——
8. Notified the supervisor of any CB hazard/attacks. —— ——
9. Continued the mission. —— ——
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
scores NO-GO on any performance measure, show or tell the Soldier what was done incorrectly and how to do it correctly.
DA FORM 1594
FM 3-11.4 (FM 3-4)
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