Revised scopes of work for indoor dust cleaning program, August

NYC 9/11 Public Portal Document

inspector, date ofinspection, building location, a description ofthe HVAC system, the basis for the determining whether or not the system was impacted by the collapse ofthe WTC and if the system requires cleaning. e. Ifa HVAC system requires cleaning, then the Monitoring Contractor shall prepare a scope ofwork for the cleaning the HVAC system or portion thereof. The scope ofwork shall be provided to EPA for approval within 2 business days ofthe completion ofthe HVAC system evaluation. A copy of the scope of work shall also be provided to DEP. f. Ifthe Monitoring Contractor is not a member ofthe NADCA, a subcontractor that is a member may perform the HVAC system evaluation and inspection. Deliverables

The Project Monitor shall record ifthe HVAC systems has been impacted by dust or debris from the collapse of the WTC, ifthe HVAC system has been evaluated and cleaned subsequent to September 11,2001 (ifyes, then when and by whom) and ifthe HVAC system requires cleaning. This information shall be provided via F2L or an agreed upon alternative electronic format or website approved by EPA within 24 hours of activity.

7. HVAC systems that have been impacted by dust or debris from the collapse ofthe World Trade Center will be cleaned. In the event that a HVAC system for an entire building requires cleaning, a separate, site specific contract will be awarded by DEP for this work. If only a portion of a HVAC system requires cleaning, then the Cleaning Contractor will conduct the cleaning utilizing specialized labor trained and experienced in duct cleaning. a. The monitoring contractor shall schedule and oversee the cleaning of HVAC systems. b. The Monitoring Contractor shall inspect HVAC systems or portions thereofcleaned to verify cleanliness. Ifvisible dust or other contaminants are evident through visual inspection or testing, then the Monitoring Contractor will direct the HVAC Cleaning Contractor to relean those portions of the system where dust or other contaminants are present and reinspect. c. HVAC cleaning, and cleanliness inspections shall be conducted in accordance with the National Air Duct Cleaners Association (NADCA) General Specification for the Cleaning of Commercial Heating, Ventilating and Air Conditioning Systems and the NADCA Assessment, Cleaning and Restoration Standard (ACR 2002).

8. Sampling of residences and common spaces where cleaning has not been requested a. Based on consultation with resident, aggressive or modified aggressive air sampling will be conducted. i. Before beginning aggressive air sampling, a 1 horsepower electric leafblower shall be used to direct exhaust air against walls, ceilings, floors and other surfaces. This shall continue for at least five minutes per 1,000 square feet of floor. When directing the exhaust, caution shall be taken to minimize disturbance and potential damage to furnishings and personal belongings

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