HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document Ventilation System Identification: rage 1

Area Served: ,4gôjE THE CeIl.i$G LD Associated mechanical room: clean4r N dxy f N stored chemicals/refuse Y N System Components Surface [NOTE: if component not present (NP), not found D WTC • not present indicate in last column] (~ or inaccessible (1) please Debris Dust • not found Present? Present? • te•rroccihls Outside air Intake: Location: Accessible fof inspection? Y_ ,N (explain): — louvers, grates and/or screens — outside air duct — outside air damper(s) Air handling unit: — outside air mixing chamber — filter rack(s) — filter media — blower assembly incl. blower wheel, blower housing, air l4 vanes, in-line noise attenuators — blower housing acoustical lining — pre-heat coils — heating coils — cooling coils — re-heat coils — condensate drain pan — supply air plenum — supply air plenum damper(s) — vibration collars Supply air distribution: N — Supply air ducts Est. total In ft 80 No. locations inspected 2. Specify type (circle): eta ` fibrous ed masonN fibrous @lass board ex-d wed — Accessible in-line fire dampers Est. total qty__ No. locations — Accessible turning vanes Est. total qty. No. locations —In-line reheaticooling coils Est. total qty No. locations — Suppl air diffusers Est. total qty_, __-•— No. locations

— Return air ducts Est. total In ft i7 No. locations inspected 2. Specify type (circle): eta brow lassde masoy fibrous glass board ex-du wd — Return air plenum Est. total RA plenum areas t No. locations inspected 1 —Return air plenum damper Est. total qty No. locations inspected — Accessible in-line fire dampers Est. total qty______ No. locations inspected — Accessible turning vanes Est. total qty No. locations inspected — Return air grilles Est. total qty 3 No, locations inspected 1

NYC-WTC 000135488