HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document 2.1 Central Ventilation System Visual Inspection Form Paae 1 of 2 cuwauun aysiem iaenuncauon: Ac-2. i'rr Location: Area Served:

Associated mechanical room: clean ✓ Y N dry~Y N stored chemicals/refuse Y N System Components Surface Component Dust/ WTC • not present [NOTE: if component not present (NP), not found (NF) or Inaccessible (I) please Debris Dust indicate in last column] . not found Present? Present? , Inaccessible Outside air Intake: Location:

Accessible for inspection? Y N (explain):

— louvers, grates and/or screens t P — outside air duct N1' — outside air damper(s) 1( - Air handling unit: — outside air mixing chamber — filter rack(s) NP — filter media — blower assembly incl. blower wheel, blower housing, air vanes, in-line noise attenuators — blower housing acoustical lining — pre-heat coils — heating coils k, — cooling coils — re-heat coils — condensate drain pan — supply air plenum — supply air plenum damper(s) lU — vibration collars Supply air distribution: — Supply air ducts Est. total In ft ." j O4 No. locations inspected i Specify type (circle): niegl fibrous glass lined metal) masoxuv fibrous class board flex-duct "1 — Accessible in-line fire dampers Est. total qty_ No. locations inspected — Accessible turning vanes Est. total qty 1 No. locations inspected, — In-line reheat/cooling coils Est. total qty No. locations inspected N,? — Supply air diffusers Est. total qty C No. locations inspected 2 Return air dstribution: — Return air ducts Est. total In ft No. locations inspected,_ Specify type (circle): fibrous class lined metal masomy fibrous glass board flex-duct w od A , — Return air plenum Est. total RA plenum areas- t No. locations inspected_ ~t — Return air plenum damper Est. total qty _ No. locations inspected j — 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 No. locations inspected

NYC-WTC 000135542