UFC 4-211-02N
10 January 2005
including change 3, 13 April 2007
OSHA de minimis policy for reduced airflow
rates
* UFC-3-410-04-app B.pdf 9-FEB-2000
VENTILATION RATE FOR FULLY ENCLOSED
WALK IN PAINT BOOTH/ROOM
Corrosion Control Hangars treated as spray
areas per OSHA because of larger volumes
allowing reduced airflows with de minimis
* UFC-3-410-04-app c.pdf 1-JUL-1999
policy
INDUSTRIAL VENTILATION RATES IN
AIRCRAFT CORROSION CONTROL
HANGARS
Reduced Air Velocities Allowed in Spray
2001 - 10/22/2001 - Clarification of minimum
booths
face velocity requirements for spray booths.
Recirculation in compliance with NFPA 33,
2001 - 09/17/2001 - Full compliance with NFPA
33-2000 may be considered a de minimis
considered a de minimis violation and would
not be cited. One of the main standards now
violation.
cited by the U.S. Air force for corrosion control
hangars considered as Spray areas.
(80%) Recirculated air and 20% fresh air) to
2002 - 06/24/2002 - Hierarchy of controls for
protect employees in a spray booth from air
exposure to air contaminants.
contaminants. (This is basically the same
interpretation the Air force is fully adopting) .
One of the main standards now cited by the
U.S. Air force for corrosion control hangars
considered as Spray areas
Spray Booth Compliance
2004 - 08/12/2004 - Spray booth requirements
including automatic sprinkler systems,
relationship to NFPA 33 requirements, and paint
storage.
1910.94
Reduction of Airflow velocities in Paint Booths
2001 - 10/22/2001 - Clarification of minimum
face velocity requirements for spray booths.
Reduction of Airflow velocities in Paint Booths
1997 - 04/08/1997 - The airflow rate required for
a spray painting area.
/2/
A-7
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