Chapter 5: Using The Ductless Enclosure
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Work Techniques
• Keep all materials a minimum of 4 inches (100 mm) from the inside
of the lower air foil, and perform all contaminated operations as far to
the rear of the work area as possible.
• Segregate all clean and contaminated materials in the work area.
• Arrange materials to minimize the movement of contaminated
materials into clean areas.
• Keep all discarded contaminated material to the rear of the work area.
• Avoid moving materials or the operator's hands and arms through the
front access opening during use.
• Avoid the use of an open flame.
• Avoid using techniques or procedures that disrupt the airflow patterns
of the enclosure.
Final Purging
• Upon completion of work, the enclosure should be allowed to operate
for two to three minutes undisturbed, to purge airborne contaminants
from the work area.
Unloading Materials and Equipment
• Objects in contact with contaminated material should be surface
decontaminated before removal from the enclosure.
• All open trays or containers should be covered before being removed
from the enclosure.
Wipe-Down
• Wipe down the interior surfaces of the enclosure with suitable
solvent, disinfectant, or cleaner. Important Note:
Clean up
procedures using alcohols or volatile chemicals with low filter
capacity could saturate the filters quickly.
• Dispose of used rubber gloves appropriately, and have
soiled/contaminated lab coats laundered properly.
• Wash hands and arms thoroughly with soap.
Shutdown
• Turn off the fluorescent light and enclosure blower to preserve filter life.
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