UFC 4-010-01
8 October 2003
Including change 1, 22 January 2007
occupants against chemical, biological, and radiological threats, and notifying building
occupants of threats or hazards.
B-4.1
conditioning (HVAC) systems that are designed to move air throughout a building that
are at ground level provide an opportunity for aggressors to easily place contaminants
where they could be drawn into the building. The following measures will be applied to
minimize those opportunities.
B-4.1.1
New Buildings. For all new inhabited buildings covered by this UFC
locate all outside air intakes that distribute air throughout the building at least 3 meters
(10 feet) above the ground.
B-4.1.2
Existing Buildings. The above requirement is recommended, but not
mandatory, for existing inhabited buildings covered by these standards.
B-4.2
Standard 17. Mail Room Ventilation. To ensure airborne chemical,
biological, and radiological agents introduced into mail rooms do not migrate into other
areas of buildings in which the mail rooms are located, provide separate, dedicated air
ventilation systems for mail rooms. Refer to the DoD Security Engineering Facilities
Design Manual for additional guidance.
B-4.2.1
systems such as steam, hot water, chilled water, and refrigerant may serve mail rooms
as long as the airflow systems for the mail rooms and other areas of the buildings in
which they are located remain separate.
B-4.2.2
Dedicated Exhaust Systems. Provide dedicated exhaust systems within
mail rooms to maintain slight negative air pressures with respect to the remainder of the
buildings in which the mail rooms are located so that the flow of air is into and contained
in the mail rooms. Though the airflow into the mail rooms will not eliminate the potential
spread of contamination by personnel leaving the mail room, it will limit the migration of
airborne contaminants through openings and open doorways.
B-4.2.3
system outside air intakes, relief air, and exhausts with low leakage isolation dampers
that can be automatically closed to isolate the mail rooms. The low leakage dampers
will have maximum leakage rates of 3 cfm/square foot with a differential pressure of one
inch of water gage across the damper.
B-4.2.4
Isolation Controls. Provide separate switches or methods of control to
isolate mail rooms in the event of a suspected or actual chemical, biological, or
radiological release.
Standard 18. Emergency Air Distribution Shutoff. For all new and
B-4.3
existing inhabited buildings, provide an emergency shutoff switch in the HVAC control
system that can immediately shut down the air distribution system throughout the
B-19
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