Updated WTC cleanup and monitoring SOWs, July 2002

NYC 9/11 Public Portal Document

shafts are determined to contain significant WTC dust and or debris, clean-up will proceed under the Scope B site specific work plan. Work will begin from the entrance and continue through all common spaces in an orderly fashion. A detailed description of the minimum cleaning requirements for common space is as follows: a. Vacuuming will begin with the ceiling, continue down the walls and include floors.

b. Impermeable walls and floors will be wet wiped using disposable wipes, after consultation with and approval by owner. Wet wiping will not be conducted if it is determined that it would cause damage tq the c. Carpets will cleaned with a hot water extraction cleaner. The cleaner shall be equipped with a motorized agitator brush and have a static water lift of 95 to 110 inches. 2. Cleaning of HVAC Systems If the Project Monitor in consultation with EPA d^rmines that an HVAC System requires cleaning, the cleaning contractor shall clean the HVAC system utilizing specializ^labor trained and experienced in duct cleaning. The HVAC cleaning wifi be conducted in accordance with National Air Duct Cleaners Association (NADCA) General Specification for the Cleaning of Commercial Heating, Ventilating and Air Conditioning Systems and, die NADCA Assessment, Cleaning and Restoration Standard (ACR 2002). In the event that the HVAC system for an entire building requires cleaning a separate, site specific contract wili be awarded for this work. Verification of HVAC system cleanliness will be determined by the Monitoring Contractor. Ifvisible contaminants are evident through visual inspection, those portions ofthe system where contaminants are visible shall be r^Baned and subjected to reinspection for cleanliness. .<^'5 xlF IF 3. Cleaning of Residential Spacgi;;> All horizontal hard surfac^i^all be HEPA vai led and wet wiped. Vertical and soft surfeces shall be HEP^|yh|humed two times. Surfaces include but are not limited to walls, floors, ceilings, ledger trims^ furnishings, appliances, equipment, etc. Encapsulating agents shall not be applied. Dry sweeping is prohibited. Carpets will be cleaned with a hot water extraction cleaner. Cleaning of clothing and accessories (handbags, shoes etc.) shall be the responsibility ofthe occupant, A detailed description of the minimum cleaning requirements is as follows: a. Terraces, balconies, extenor window sills, window wells and window guards that are accessible from the Interior of the dwelling, will be cleaned. Interior windows, screens, window sills and window guards will be cleaned Vacuumii^^ill begin with the ceiling, continue down the walls and include the floor. Tmperjg^hble walls and floors will be wet wiped using disposable wipes, after consultation with and approval by owner. Wet wiping will not be conducted if illl n js determined that it would cause damage to the surface. e. Curtains, fabric window treatments, upholstery and other materials that cannot be cleaned by wet wiping shall be HEPA vacuumed two times. Fabric covered furniture will be vacuumed using a stiff brush attachment. f. Carpets will cleaned with a hot water extraction cleaner. The cleaner shall be equipped with a motorized agitator brush and have a static water lift of 95 to 110 inches. g- Paperwork, books shall be HEPA vacuumed.

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