Air sampling summary report, 400 Chambers Street, 2002

NYC 9/11 Public Portal Document

ATC Project No.: 09622-0012 Tribeca Park — 400 Chambers Street February 15, 2002 Related Management Company, L.P. Page 2

Photo 2— Typical Acclumation

Ambient Air Sampling Common Area & Apartment Cleaning Procedures and PCM dust film, dust accumulation, or Common areas, individual apartments identified as having a between September 18 — 20, 2001 units specifically requested by the occupant were cleanedEnvironmental Corp. and Hazardous utilizing licensed asbestos abatement contractors Pinnacle New York Department of Elimination Corp) utilizing the procedures contained in the City of memorandums regarding the cleanup Environmental Protection's September 14 and 26, 2001 of debris inside buildings. thoroughly clean all accumulated dust and/or The intent of this cleaning is to completely and methods and/or HEPA filter equipped debris from apartment surfaces utilizing wet cleaning quickly as possible. vacuums allowing families to return to their respective units as disposable coveralls (tyveck or equal) and at 1. All workers involved in the cleaning shall wear HEPA cartridges. a minimum '/% face negative pressure respirators with thoroughly clean. Thoroughly vacuum 2. Remove each wall mounted inceptor HVAC unit and grate, housing and accessible coils. the entire unit including diffuser, wall sleeve, apartment subsequent cleaning by building Remove filter and place in sealed 6 mil unlabeled bag for and surrounding attachment personnel. Thoroughly vacuum the interior of the filter housing supply). Reinstall unit. management to points and replace filter with new filter (building surfaces including walls, moldings/trim, 3. Thoroughly wet clean and/or vacuum all apartment and appurtenances. doors, installed appliances, window components, installed fixtures, furthest comer working out the area to be 4. Sequence the work to commence cleaning in the cleaned.

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NYC-WTC 000102770