NOTE: The cost of using the PDDA to decontaminate terrain in terms of time, manpower, and materials
is high; this type of operation should be avoided unless absolutely necessary. Weathering or
burning is preferred.
If terrain must be decontaminated, use slurry coverage for various surfaces as specified in Figure 38.
Figure 38. Area coverage by slurry.
After your spraying mission has been completed, flush, drain, clean, and stow the components of the
M12A1 PDDA as described in earlier lessons.
Learning Event 4
ASSEMBLE, DISASSEMBLE, AND OPERATE THE SHOWER ASSEMBLY
OF THE M12A1 PDDA
The M12A1 PDDA has a shower assembly that is used to provide showers. The assembly consists of 18
pipes and the necessary connections and fittings as described in Lesson 1. When assembled, the shower
assembly can provide showers for 24 people at a time. Water is heated for the showers with the M2
water heater. Water for showering can be pumped from either the tank unit or from a natural water
source. However, before using water from the tank for showering, inspect the tank for any evidence of
contamination such as STB decontaminating agent, sodium hydroxide, sodium hypochlorite chemicals,
calcium hypochlorite, or fire fighting foam. If any contamination is evident, clean the tank before filling
it with water for showering.
ASSEMBLY Of THE PERSONNEL SHOWER
You will need a helper to efficiently assemble the personnel shower. To perform the assembly, use the
following procedures.
Step 1. Remove the 18 pipes from the storage bracket on the tank unit. Sort the pieces as you lay then
on the ground.
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