b. Preparation Methods.
(1) Slurry Paste.
Mix one 50-pound drum of STB with 6 gallons of water. Slurry paste consists of approximately equal
parts (by weight) of STB and water.
(2) Dry Mix.
Mix 2 shovels STB to 3 shovels of earth or inert material, such as ashes.
(3) Slurry Mix.
For chemical decontamination, slurry mix will consist of 40 parts STB to 60 parts water, by weight. To
mix in the M12A1 PDDA, use 150 pounds of STB, 225 gallons of water, 1-1/2 pounds of antiset, and 24
ounces of antifoam.
For biological decontamination, slurry mix will consist of 7 parts STB to 93 parts water, by weight. To
mix in the M12A1 PDDA, use 1300 pounds of STB, 225 gallons of water, 12-1/2 pounds of antiset, and
24 ounces of antifoam.
Lampblack or dye mixes may be added for camouflage. No mixing is required.
Mask Sanitizing Solution.
Mask sanitizing solution is used on previously cleaned masks with filter elements removed.
a. Preparation of sanitizing solution.
Fill a standard plastic canteen to the shoulder with water. Add one 0.5 gram tube of Calcium
Hypochlorite from the water purification kit. Cover the canteen and shake vigorously for 30 seconds.
Mix bulk quantities as follows: Add 2.0 grams of Calcium Hypochlorite (from 6-ounce jar) to 1 gallon
b. Sanitizing method.
Place the-mask face up. Attach a canteen to the mask at the drinking tube. Drain one canteen full of
sanitizing solution through the mask. Follow with two canteens of clean water as a rinse. Immerse the
mask and outserts in sanitizing solution. Agitate for 5 minutes. Rinse twice in clear water, agitating 2
or 3 minutes each time. Dry all parts and reassemble the mask. One gallon of solution is needed for
every ten masks.