NYC 9/11 Public Portal Document
Building Facade Clean-up
Work shall be performed by a NYSDOL licensed asbestos
contractor with NYCDEP and NYSDOL
asbestos certified workers.
The contractor performing the cleaning should be experienced
in cleaning building facades.
The clean up area shall be specified ("specified area") by
DEP. The area below the facade cleaning shall
be covered with a layer of polyethylene sheeting.
All debris must be collected for disposal as ACM
directly upon removal from the surface. (i.e. All waste
must be double bagged in ACM waste labeled
bags.) Running water or water runoff on the building facade
is not permitted.
Building occupants shall be notified prior to the facade cleaning. Access
to the street below the facade
cleaning shall be restricted and marked with caution tape. Cleaning shall
not be performed during wind
speeds greater than 20 mph.
All HVAC systems and air conditioners shall be turned off: All windows
shall be closed
cleaning of the building. Some air conditioners and windows may require sealing with during the
duct tape to
prevent water penetration.
In uses where equipment is rigged from the roof All clean-up activities on the roof must
be
completed prior to rigging equipment from the roof.
All horizontal surfaces and all windows on the facade shall be cleaned of large bulk material by wetting
and hand brushing or scraping with non-metallic bristle brushes or non-metallic scrapers, by wet wiping
and/ or by HEPA vacuuming from top to bottom. Only water shall be used for wet and low-
wiping
pressure washing. Detergents, solvents, additives, and any other chemical cleaning agents are prohibited.
The removed material shall be immediately placed into containers (e.g. bags). Windows shall be wet
wiped. Free running water shall not be evident during this procedure. Power for HEPA vacuums shall be
supplied through ground fault interrupters.
After completion of debris removal, the specified area shall be carefully washed. A low pressure washing
technique, moving from top to bottom, shall be employed to minimize water bounce-back. Facades shall
be washed with a low-pressure wash not to exceed 250 psi.
At the completion of work, a visual inspection of the abated surfaces and sidewalk shall be performed to
verify the absence of visible debris.
Air monitoring shall be performed by an independent NYSDOL licensed third party air monitoring fum
with certified workers.
In order to minimize disruption to the public and to the building occupants, it is recommended this work
be performed during off-hours.
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05/03/02
NYC-WTC 000127572
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