After making these connections, open valve 1.
When the connections have been made and the valves are in the proper position, prime and start the
pump. The procedure for priming and starting the pump was described in Lesson 2, Learning Event 1.
The procedure for loading the tank with water was discussed in Lesson 3, Learning Event 1.
In the procedure for loading decontaminants into the tank unit assembly, you should first pre-open 26
cans (1300 pounds) of STB and replace the lids. After the STB is opened, go by the following steps to
mix the slurry.
Step 1. Remove the hopper tank lid and add 12.5 pounds of M2 antiset and 24 ounces of silicone
antifoam agent to the 225 gallons of water. Cycle the mixture for at least three minutes.
NOTE: The water containing the M2 antiset must be cycled for at least three minutes to completely
dissolve it. The M2 antiset must be completely dissolved.
NOTE: If M2 antiset is caked, it must be crushed as fine as possible before adding it to the water in the
Step 2. Before starting the addition of the STB, break large lumps of caked STB decontaminating agent
to prevent clogging of the lines and to obtain the best possible water-slurry mixture.
To prevent damage to the apparatus, do NOT strike the metal drums
containing STB against the tank or any other part of the tank unit