NYC 9/11 Public Portal Document
OCT-29-2002 14:48 NYCDEP BANHM ASE/LEAD TRU 718 595 3648 P.11
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
during the
cleaning of the building. Some air conditioners and windows may require sealing with duct tape to
prevent water penetration.
In cases where eouipment is rigge 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
and hand brushing or scraping with non-metallic bristle brushes or non-metallic scrapers, by wetting
wet wiping
and/ or by HEPA vacuuming from top to bottom. Only water shall be used for wet wiping
and low-
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
technique, moving from top to bottom, shall be employed to minimi2e water bounce-back. washing
be washed with a low-pressure wash not to exceed 250 psi. Facades shall
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 firm
with certified workers.
In order to minimize disruption to the public and to the building
occupants, it is recommended this work
be performed during ofihours.
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NYC-WTC 000116152
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