from top to bottom. Take care to rinse the
supplies to decontaminate the interior of his or her
undercarriage. This station uses approximately 200
vehicle. The best decon solution for use in the interior
gallons of water. Failure to remove all the DS2 from
of vehicles is a 5 percent solution of HTH or STB. The
the vehicle may cause false positive readings at station
driver wipes all reasonable accessible surfaces with a
5. If high water pressure systems (M12A1 PDDA,
rag or sponge soaked in the HTH or STB solution. Do
M17 LDS) are not available, large volume water
not attempt to decon areas where there is little
pumps (65-gpm pumps) should be used at this station.
likelihood of contamination (electrical assemblies,
etc.).
Station 5--Check
CAUTION
The objective of this station is to check the
Do not mix HTH or STB with DS2. If
completeness of the decon. This station determines
mixed, a violent reaction will occur.
whether the vehicle has a negligible risk or still has
significant contamination remaining. Detection
procedures will vary depending on the type of
Once interior decon is completed, the driver
contamination. If significant contamination is found
dismounts from the vehicle and proceeds to the start
on the vehicle, the vehicle will be recycled to station
of the detailed troop decon (DTD). Having completed
2 for chemical contamination or station 1 for
the DTD, the assistant driver mounts the vehicle and
radiological contamination.
moves it to the next station. Drivers must exercise
caution when entering or exiting the vehicle. A
Chemical
DS2-coated surface is slippery and DS2 may react
with chemical protective footwear. Personnel should
avoid stepping in DS2 and tracking it into the vehicle.
The CAM is used to check for the presence of
vapor from residual liquid contamination. A one bar
or lower reading on the CAM indicates a negligible
For radiological contamination, use an AN/PDR
risk. Once the CAM indicates the presence of vapor
27-series radiac meter to decide the extent and
contamination, M8 detector paper is used to verify the
location of contamination inside the vehicle. If there
presence of liquid contamination. If it is suspected
is contamination, figure out the intensity of the
that both the CAM and M8 paper are producing a false
c o n t a m i n a t i o n inside of the vehicle. If the
positive reading, use an M256 chemical detector ticket
contamination has an intensity greater than 0.33 cGy
to confirm or deny the presence of contamination.
(the negligible risk), the interior of the vehicle must
Table 6-7 is a list of common interference that can
be decontaminated. Use hot, soapy water to wash the
cause false positive readings on the CAM. If the
contaminated areas. Use a sponge to mop up the water
vehicle has significant contamination remaining,
and the contamination. Table 6-6 is a planning guide
recycle it.
for decon mixtures.
There will be desorption of chemical agents from
the surfaces after decontamination. On
Station 4--Rinse
CARC-painted surfaces, the desorption of vapors will
stop sooner than alkyd-painted surfaces. Consider
The objective of this station is to remove the DS2
this when checking decontaminated items for overall
from the vehicle. The vehicle is sprayed with water
decontamination effectiveness.
Table 6-6.--Preparation of Decon Mixtures
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