ETL 1110-3-498
24 Feb 99
F-4. Processing Procedure Recommendations.
Processing procedures are the responsibility of the local command authority. Basic and commonly
used ingress in-processing procedures are shown in Tables F-3 an F-4. If detector paper indicates
liquid contamination on outer garments, open-air decontamination may be required before entering
the airlock.
Table F-3
Two-Stage Airlock Processing Procedures
Item
Description
1
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.
2
Look through the view window to ensure that the first stage is not occupied. If
unoccupied, enter the airlock first stage.
3
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.
4
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.
5
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.
F-6
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