NYC 9/11 Public Portal Document
OCT-08-2002 09:54 NYCDEP HANH11 ASS/LEAD TRU 718 595 3648 P.11
• f
.r,
Building Facade Clean-up
'V
and NYSDOL
Work shall be performed by a NYSDOL licensed asbestos contractor with NYCDEP
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.
facade
Building occupants shall be notified prior to the facade cleaning. Access to the street below the
cleaning shall be restricted and marked with caution tape. Cleaning shall not be performed during wind
speeds greater than 20 mph.
the
All HVAC systems and air conditioners shall be turned off. All windows shall be closed during
cleaning of the building. Some air conditioners and windows may require sealing with duct tape to
prevent water penetration.
In cases where eguinment is rigged from the roof All clean-up activities on the roof must be
completed prior to ri
equipment from the roof.
gging
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 HBPA 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 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 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 off-hours.
Page 5
05/03/02
NYC-WTC 000116376
OCR can misread numbers and units. Confirm readings against the page image before using them.