Step 3. Add the 26 cans (1300 pounds) of STB to the hopper-blender in one continuous operation.
Blend constantly and see that the hopper-blender does not run out of STB until the addition is complete.
If the supply of agent is exhausted before loading is completed, the slurry may foam. Stop foaming by
adding additional silicone antifoam agent.
NOTE: To prevent the slurry from settling, it must be agitated constantly until it is used.
Step 4. After blending is complete, replace the tank lid. The slurry mixture must now be agitated.
MIX DECONTAMINANTS
To agitate mixtures of decontaminants, use the following procedures.
Step 1. With the pump operating, close value 1 and reduce engine speed to an idle. To be sure that
valve 1 is completely closed, check to see if slurry has flooded back into the tank unit. You can check
this by observing the liquid level indicator in the hopper-blender.
Step 2. Disconnect the agitator-blender hose from the blender pipe on the hopper and connect the hose
to the agitator pipe.
Step 3. Open valve 1 and agitate the mixture for a minimum of 15 minutes. Operate the engine at 3,850
RPM. The pump discharge pressure, as indicated on the pump discharge pressure gage, should read
approximately 105 psi.
Step 4. Continue agitating the slurry until it is used.
SPRAY DECONTAMINANTS FROM THE TANK
When the decontaminant is mixed and agitated, you are ready to spray the mixture for decontamination.
To do this, proceed according to the following steps.
Step 1. With the pump still running, unreel the discharge hoses and open valve 2 or 3, or both,
depending on whether the lower, upper, or both discharge hoses are to be used.
Step 2. Open the ball valves on the gun assemblies. Adjust the slurry nozzle to vary the spray pattern
from stream to fine spray mist. The pump discharge pressure gage should indicate approximately 105
psi when slurry is being sprayed.
NOTE: The pressure gage indication while spraying slurry may vary between 60 and 120 psi when the
tachometer is indicating 3850 RPM.
Spray the equipment which needs decontamination or, if required, spray terrain by covering areas about
two meters wide evenly and thoroughly.
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