Revised scopes of work for indoor dust cleaning program, August

NYC 9/11 Public Portal Document

to Scope of Work B). Residents may be present during Scope A cleaning procedures.

1. Cleaning of Common Spaces Common spaces including hallways, stairways and the interior ofelevator cars shall be cleaned, if requested by the building owner. The Monitoring Contractor in consultation with EPA, or EPA ’ s designee will evaluate and determine ifother common areas including utility rooms, laundry rooms, compactor rooms require cleaning. Work will begin from the entrance and continue through all common spaces in an orderly fashion. A detailed description ofthe minimum cleaning requirements for common space is as follows; a. Vacuuming will begin with the ceding, continue down the walls and include floors. A vacuum equipped with a motorized agitator bar will be used to vacuum carpets. b. Impermeable walls and floors will be wet wiped, after consultation with and approval by owner. Wet wiping will not be conducted ifit is determined that it would cause damage to the surface. c. Carpets will be cleaned with a water extraction cleaner after consultation with and approval by owner. After cleaning, red rosin construction papa; will be applied to high traffic areas to protect carpets from soiling. Water extraction cleaning will not be conducted ifit would cause damage to the carpet. d. Surfaces that are not cleaned by wet methods (wet wiping and water extraction cleaner) will be vacuumed two times.

2. Cleaning of HVAC Systems HVAC systems that are determined by the Monitoring Contractor to be impacted by dust or debris from the collapse ofthe World Trade Center will be cleaned in accordance with the site-specific scope of work prepared by the Monitoring Contractor and approved by EPA. HVAC systems cleaning, if warranted, shall be completed prior to the initiation ofthe cleaning ofcommon space or residences within an affected building. In the event that the 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 an HVAC system requires cleaning, then the cleaning contractor will conduct the cleaning utilizing specialized labor trained and experienced in duct cleaning. HVAC cleaning shall be conducted in accordance with National Air Duct Cleaners Association (NADCA) General Specification for the Cleaning ofCommercial Heating, Ventilating and Air Conditioning Systems and the NADCA Assessment, Cleaning and Restoration Standard (ACR 2002). Verification ofthe effectiveness ofHVAC system cleaning will be determined by the Monitoring Contractor. Ifdust or other contaminants are evident through visual inspection, those portions ofthe system where dust or other contaminants are present shall be recleaned and subjected to reinspection for cleanliness. Ifthe cleaning contractor is not a member ofthe NADCA, a subcontractor that is a member may perform this portion of the work.

3. Cleaning of Residential Spaces Residences will be cleaned using HEPA vacuums, water extraction cleaners and wet wiping as described below. Surfaces to be cleaned include but are not limited to walls, floors, ceilings, ledges.

4

NYC-WTC_000139105