HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document 2.1 Central Ventilation System Visual Inspection Form Page 1 of 2 venuiauon aysiem laennncanon: ~WAC 'Toth• woe.K.,t 3 Lo lion: Area Servd: 15 tc~i~- t'F - 350AL1 A I../ s '1 ~eai ~'t.Ev'~ek Associated mechanical room: clean Y N dry Y N stored chemicals/refuse Y N Surface Component System Components Dust( WTC • not present (NOTE: if component not present (NP), not found (NP) or inaccessible (1) please Debris Dust • not indicate in last column] found Present? Present? • Inaccessible Outside air Intake: Location: Accessible for 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 vanes, in-line noise attenuators N — blower housing acoustical lining .y — pre-heat coils — heating coils N 1? — cooling coils - j — re-heat coils tv N P — condensate drain pan I — supply air plenum — supply air plenum damper(s) NP — vibration collars ,P Supply air distribution: — Supply air ducts Est. total in ft No. locations inspected 2- Specify type (circIe):~ masonry nrv fibrous glass board flcduct%god — Accessible in-line fire dampers Est. total qty No. locations inspected ` NP — Accessible turning vanes Est. total qty I No. locations inspected N P — In-line reheat/cooling coils NP Est. total qty No. locations inspected — Supply air diffusers Est total qty No. locations inspected Return air distribution: — Return air ducts Est, total in ft Sr No. locations inspected - Specify type (circle): etas ous lassicd mete masonry fibrous glass board flex-duct wo t1 N — Return air plenum Est. total RA plenum areas_I No. locations inspected — Return air plenum damper Est. total gty L_ No. locations inspected_L — Accessible in-line fire dampers Est. total qty No. locations inspected 17 — Accessible turning vanes Est. total qty j No. locations inspected I 9 •. — Return air grilles Est. total qty No. locations inspected t •~

NYC-WTC 000135482