Air sampling summary letter, 225 Rector Place, Jan 2002

NYC 9/11 Public Portal Document

ATC Project No.: 09622-0013 Parc Place — 225 Rector Place January 18, 2002 Related Management Company, L.P. Pagel Of 11

General Related Management Company, L.P. in ATC Associates, Inc. (ATC), was retained by the collapse of the World Trade Center response to air quality concerns at Parc Place following the ATC conducted interviews with buildings on September 11, 2001. Addressing these concerns inspection of the ventilating, and air- building maintenance personnel, performed a visual a walk-through visual inspection of conditioning systems including air intakes for cleanliness and air samples were collected for fiber residential units and common areas. Representative ambient subsequently via Transmission and analysis initially via Phase Contrast Microscopy (PCM) accumulated dust and debris was Electron Microscopy (TEM). Sampling of representative Department of Environmental Protection's performed in accordance with the City of New York of debris inside buildings for September 14 and 26, 2001 memorandums regarding the clean-up (Attachment 5). Additionally, content analysis via Polarized Light Microscopy (PLM) for asbestos within various residential units. accumulations ATC provided oversight of the clean up of dust Inspection Interviews with Building Maintenance Personnel and Visual our independent observations, ATC Based upon ATC's discussion with the resident manager andshut down the house air conditioning concludes that; building maintenance personnel successfully that at the time of our inspection the system minimizing dust Intrusion into the HVAC systems andaccumulations. Accessible residential of dust house-supplied air conditioning was off-line and free accumulations. This inspection subjectively units were visually inspected for dust and debris The categories are; No visible categorized the dust accumulation into five depositional levels.The inspection identified 71 units Accumulation. dust, Minor Film, Film, Minor Accumulation and units with Minor Films, 34 units with a Film, 27 units with Minor with no visible dust, 113 units. Typical Film condition Accumulations, 47 units with Accumulation and 12 inaccessible photo 1, typical Accumulation photo 2.

Photo I - Typical Film Condition

ATC Associates Inc. © 2002

NYC-WTC 000124053