ETL 1110-3-490
13 May 98
h. Instructional Signs. Basic instructions must be provided on the outer and inner doors.
i. Clothing Chute or Trash Bag Container. A clothing chute allows contaminated clothing to
be removed from the airlock and discarded outdoors without re-exposure of personnel to the
contaminated atmosphere. As an alternative, plastic trash bags can be placed in the airlock so that
personnel can seal clothing in the bag after removal. The bag is then removed by the next group
entering the airlock. If a clothing chute is not provided, a trash bag container should be provided.
C-3. Recommended Airlock Signs.
Recommended signs to be stenciled on the airlock are shown in Table C-1.
Table C-1
Airlock Signs
Sign
Location
1.
Two-Stage Airlock
1.
Above the outer door.
2.
Do Not Open if Airlock is Occupied.
2.
On the outer door.
3.
Upon Entering, Set Timer for 4 Minutes.
3.
On the outer door below the other sign.
4.
Remove Mask Only after 4-Minute Purge
4.
On the second door, read from outer
and/or CAM Check.
compartment.
5.
Filtered Air Input
5. Near the filtered air inlet.
6.
CAM Check Port.
6. On the second door above the CAM port.
7.
Remove Outer Garments Before
7. On the second door, read from outer
Processing to Next Compartment if
compartment, below the other sign.
Exposed to Chemical Agent.
8.
Set Timer for 4 Minutes.
8. On the second door, read from inner
compartment.
C-4. Processing Procedure Recommendations.
Processing procedures are the responsibility of the local command authority. Basic and commonly
used ingress in-processing procedures are described in Table C-2. If detector paper indicates
liquid contamination on outer garments, open-air decontamination may be required before entering
the airlock.
C-3
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