13 May 98
Before entering the airlock first stage, ensure that the airlock filter blower unit is
operating and that air is being discharged from the purge vents.
Look through the view window to ensure that the first stage is not occupied. If
unoccupied, enter the airlock first stage.
After entering the airlock first stage, remove any items left from the previous in-
processing group. Set the timer to 4 minutes. During the 4-minute dwell time,
remove outer garments and put them in the trash bag or clothing chute provided.
When the 4-minute dwell time is complete, personnel in the second stage of the
airlock should check the first stage with a chemical agent monitor to ensure that the
contaminants have been sufficiently removed. After the first stage has been checked
and no contaminants have been detected, proceed to the second stage.
After entering the second stage, set the timer for a 4-minute purge time. After the 4
minutes have elapsed, hold your breath, remove your mask, and enter the TFA.
Depending on user requirements, the mask is either placed in a mask bag, sealed, and
taken into the shelter for use during an emergency or the mask is left in the airlock
and removed by the next processing group.