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ITG FY03-4
5 June 2003
Communicate, When You Remediate
Establish that the health and safety of building occupants are top
Demonstrate that the occupants' concerns are understood and
taken seriously.
Present clearly the current status of the investigation or remediation
Identify a person whom building occupants can contact directly to
discuss questions and/or comments about the remediation
CONTAINMENT. During remediation, containment limits the
release of mold into the air and surroundings, ensures mold is not spread beyond
the contaminated area and minimizes exposure to workers and building
Area Size. Determine the containment area size by the extent of
the mold contamination, ease of clean up and potential for mold distribution. As
a general rule, limited containments are recommended for areas involving
between 1 m2 to 9 m2 (10 ft2 and 100 ft2) of mold contamination. Full
containments are recommended for surfaces with greater than 9 m2 (100 ft2) of
contamination or in situations where it appears that the space would be further
contaminated without full containment. An enclosure should be the minimum
volume to encompass all of the working surfaces yet allow unencumbered
movement by the worker(s), provide unrestricted air flow past the worker(s), and
ensure walking surfaces can be kept free of tripping hazards. For larger
containments, erect wood or steel frames with polyethylene sheeting attached.
With small containments, polyethylene sheeting can be affixed to the floors or
ceilings with duct tape. Ensure the walls, ceilings and floors are structurally
adequate to ensure that portions of the enclosure do not fall down during normal
use. Exercise sound judgment when determining containment requirements.
Containment Enclosure. It is not necessary that the structure be
airtight. Design openings to direct airflow; design them to draw air into the
enclosure under all anticipated circumstances. Use an airlock or a vestibule to
control openings for exits.
Line walls, barriers, ceilings, and floors with double layers of
polyethylene sheeting having a thickness of at least 0.15 mm (6 mil.)
Seal all supply and air vents, doors, chases and risers within the
containment with polyethylene sheeting to minimize the migration of
contaminants to other parts of the building.


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