WTC Dust Cleaning Scope of Work Draft, July 2002

NYC 9/11 Public Portal Document

cleaning activities in each residence within no more than 2 days. The contractor shall be prepared to work 7 days per week between the hours of 8 am and 6 pm. Activities shall be coordinated with the Monitoring Contractor to ensure that the visual inspection is perfonned within two hours of the completion of cleaning activities. Cleaning activities shall be considered completed upon successful visual inspection by the Monitoring Contractor. Copies of all invoices for work conducted under this contract shall be provided to EPA and DEP. Decisions regarding the reimbursement of costs will be made by DEP. if All cleaning operations will be conducted in accordance with cither Scope A or Sedpe B as described below.

HEPA means a filter system capable of trapping and retaining 99.97% ^all mono-dispersed particles of 0.3 micrometers in diameter.

HEPA vacuum means a vacuum cleaner equipped with a , with a static water lift of 95 to 100 inches.

Scope of Work A Application: These procedures apply to the cleaning of minimal dust accumulations (light coating). If a visual inspection indicates the presence of signs lieant aeeumulatio^tof dust and/or debris from the collapse of the WTC, Scope B proceduresws..shall applied (refer to Scope of Work B). Residents may be present during Scope A cleaning procedures ijaisp’'

6. Cleaning of Common Spaces Common spaces includin^Mlways, stairway.s and elevator interiors will be cleaned, if request|d by the building owner. I he Monitoring Contractor in consultation with EPA, or EPA's designee wijl evaluate and determine if other common areas including utility rooms, laundry rooms, comixictor rooms require cleaning. If elevator shafts are determined to contain significant WTC dust and or debris, cleaning 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 a.s follows; 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 consultatio^with and approval by owner. Wet wiping will not be conducted if it is determined that it would cause damage to the surface. c. Carpets will be 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

7. Cleaning of 11 VAC Systems HVAC systems that are determined to be impacted by dust or debris from the collapse of the World Trade Center will be cleaned. HVAC systems cleaning, if warranted, shall be completed prior to the initiation of the cleaning of common space or residences within an

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