NYC 9/11 Public Portal Document
Equipment shall run continuously until clearance air monitoring. A minimum ofone air change eveiy
15 minutes shall be provided. When ducting to the outside is not possible, a second negative pressure
ventilation unit compatible with the primary unit may be connected in series.
10. When conducting cleaning ofcommon space in apartment buildings, the elevator control shall be
modified to bypass the work area.
11. Prior to any cleaning ofcommon spaces, isolation barriers (i.e. sealing offofall openings, including
but not limited to windows, corridors, doorways, barriers, skylights, ducts, grills, diffusers, and any
other penetrations ofthe workplace) shall be installed with two layers of6-mil plastic sheeting sealed
with tape. All seams ofHVAC or other system components that pass through the work place shall
also be sealed. All openings shall be HEPA vacuumed prior to constructing the isolation barrier.
12. All WTC debris shall be misted and double-bagged. Accumulation ofwater is prohibited. Water
misting shall be sufficient to wet the material without water accumulations.
13. After the removal ofdebris, all surfaces will be cleaned in accordance with the procedures specified
in Scope A. After all surfaces have been cleaned, a second cleaning shall be performed. This
results in two fiill cleanings ofall surfaces, with the following exception. Water extraction cleaning
ofcarpets and fabric covered furniture will be conducted only once. Surfaces include but are not
limited to walls, floors, ceilings, ledges, trims, appliances, equipment and furnishings.
14. Residents may identify and tag certain furnishings (e.g. carpets and fabric covered furniture) for
disposal rather than cleaning. Disposal ofresidents’ personal property shall not occur without prior
written authorization by the owner.
15. Disposal ofall wastes generated during the cleaning shall be the responsibility ofthe contractor. All
waste generated shall be treated as asbestos-containing material (ACM). Transportation and disposal
of generated waste shall be in compliance with all applicable rules and regulations.
16. A Cleaning Checklist (to be provided by EPA) will be completed by the cleaning contractor as tasks
are completed to document the progress of the cleaning.
17. An activity log will be maintained by the site supervisor.
18. The cleaning contractor shall notify the monitoring contractor immediately upon completion ofthe
cleaning. The Monitoring Contractor will conduct a thorough visual inspection to verify the absence
ofvisible dust accumulations. Ifdust is observed, the cleaning contractor will reclean as necessary
at no additional cost.
19. Air sampling shall be performed by the Monitoring Contractor after the area is free of dust
9
NYC-WTC_000140624
OCR can misread numbers and units. Confirm readings against the page image before using them.