Technical guidelines for facade cleaning including safety protocols, waste disposal, and weather restrictions for asbestos removal.
NYC-WTC_000141446Folder label: “'$ Matrix, etc See FEMA”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
^^4 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 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.)
Building occupantr shall be notified prior to the fafade clear ng. Access to the street below the facade cleaning shall be restricted and marked with caution tape. Cleaning shah 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 HEP,A 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
At dir completion of work, a visual inspection of the abated surfaces and sidewalk shall be performed to verity the absence of visible debris.
Air monitoring shall be performed by an independent NYSDOL licens*jd third party air monitoring fiim with certified workers.
In order to mininJx.e disruption to the public and to the building occupants, it is recommended this work be performed during off-hours.
February 27,2002
NYC-WTC_000141446
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