Ventilation System Evaluation Form, WTC Site, Feb 2003

NYC 9/11 Public Portal Document 2.1 Central Ventilation System Visual Ins ection Form Ventilation System Identification: (,p Location: I Pagel of 2 ea Se ed. Associatedmechanical room: clean/Y N dry Y N stored chemicals 'refuse System Components Surface (NOTE: if component not present (NP), ponent not found (NF) or not indicate in last col umn) inaccessible (1) please Debris Present? ent not d Outside air intake: Location: q cessible Accessible for inspection? Y I\' (explain): lou •ers, grates and or No screens outside air duct outside air dam er(s) Air handling unit: Nn

outside air nuxinc chamber J NP filter rack(s) NP filter media _ blower assembly-i4wl. blower Wheel, blower Ad noise attenuators housing, air vanes, in-line blower housing acoustical lining __y___ N re -heat coils N heating coils Nn cooling coils A,J re -heat coils condercate d:an 2!". N ~ su iv air lenum N su l 'air lenum dam er(s) N vibration collars N Supply air distribution: — f Supply air ducts Est total In f: Na. ]ccations inspected_ Specify type (circle) meral fibrous Blass lined metal mac Onry fibrous Class board

Accessible in -line fire dam ers Est. total No. 1°cation; in; ected N Accessible ntrning vanes Est. total No. locations ins ected Su ]v air diffusers N to a:i ii"e ted Est. total Return air distribution: No. locations inspec ted Return air ducts Est. total In ft No. locations inspected Specify type (circle) eta f brous class lined metal masonry fibrous glass board flex -duct wood Fet'1m air p lenum ♦~ R~ c+ to.~l E_.. Iocatio.:; ins ected plenum 2reaS Tin ~ Return air plenum damper Est. NP inspected total qty__ No. locations I Accessible in-line fire dampers rj0 locations inspected Est. total qry No

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NYC-WTC 000133687