NYC 9/11 Public Portal Document
Advisory for Building Facade Clean-up Page 1 of 1
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PUBLIC NOTICE
October 24. 2001 CONTACT; (718/337-4357)
Advisory for Building Facade Clean-up
• The contractor performing the cleaning should be experienced in cleaning building facades.
• 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 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 brushing, by wet wiping and/ or by HEPA vacuuming from top to bottom.
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 completing the above, the entire facade shall be carefully washed. A low pressure
washing technique, moving from top to bottom, shall be employed to minimize water
bounce-back.
• If the environmental assessment disclosed the debris is asbestos-containing material (ACM),
this work shall be performed by a NYSDOL licensed asbestos contractor. The workers must
possess NYCDEP and NYSDOL asbestos worker certification. The area below the facade
cleaning shall be covered with a layer of polyethylene sheeting and all debris and water must
be collected for disposal as ACM waste (i.e. All waste must be double bagged in ACM waste
labeled bags.)
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