DEP memo on EPA scope of work roles and indemnification,

NYC 9/11 Public Portal Document

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 performed 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.

All cleaning operations will be conducted in accordance with either Scope iO^r Sq^ B as described below. A

HEPA means a filter system capable oftrapping and retaini^O.97% of i ^^rsed partides of 0.3 micrometers in diameter.

HEPA vacuum means a vacuum deaner equipped with a KEPAfiMer, with a static wOw of 95 to 100 inches.

Scope of Work A Application: These procedures apply to the cleaning of animal dust an jumulations (light coating). If a visual inspection indicates the presence of significant s Bnulations B dust and/or debris from the collapse of the WTC, Scope B procedures sh^^ 9> Scope of Work B). Residents may be present during Scope A cleaning procedures

1. Cleaning of Common Spaces Common spaces including h^iways, j ^ays ^^ielevator interiors will be cleaned, if requested by the building o^^per. Thcs lOmtoi Contractor in consultation with EPA, or EPA’s designee will evaluaB and deti ^;|iKer common areas including utility rooms, ^pis, con} requO ig. If elevator shafts are determined to contain ttWTCdu: ids, cleaning will proceed under the Scope B site specific work plan. We ice and continue through all common spaces in an orderly fashion. at description ofthe minimum cleaning requirements for common space is as follows:..:. 1^:.. ^^UUl a. With the ceiling, continue down the walls and include floors. b. Impermeabi I and floors will be wet wiped using disposable wipes, after consultatio: pind approval by owner. Wet wiping will not be conducted if it is determined that it would cause damage to the surface. c. Carpets t^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

2. Cteanmg ofHVAC Systems HVAC systems that are determined to be impacted by dust or debris fi-om the collapse of the World Trade Center will be cleaned. HVAC systems cleaning, ifwarranted, shall be completed prior to the initiation ofthe cleaning of common space or residences within an affected building. In the event that the HVAC system for an entire building requires cleaning, a separate, site

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