HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document Ventilation Syste den ' cation:

Lo on: Area Serve ,1t Su7i1M E u . oa Ny s' tc . on fl 4LUo A'LS -. Srl►E Associated mechanical room: clean Y N dry N stored chemicals/refuse Y N Surface Component System Components Dust/ WTC • not present [NOTE: If component not present (NP), not found (NI') or inaccessible (I) please Debris Dust indicate in last column] . not found Present? Present? . inaccessible Outside air intake: Location:

Accessible for inspection? Y i// 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 — blower housing acoustical lining — pre-heat coils — heating coils — cooling coils f — re-heat coils — condensate drain pan NP tv — supply air plenum — supply air plenum damper(s) — vibration collars Supply air distribution: — Supply air ducts Est. total In ft No. locations inspected I Specify type (circle): eta fibrous glass lined a mason fibrous alass board flex-duct w~ — Accessible in-line fire dampers Est. total qty_- No. locations inspected_, N — Accessible turning vanes Est total qty No. locations inspected —In-line reheat/cooling coils Est. total qty No. locations inspected Supply air diffusers Est. total qty :q_ No. locations inspected Return air distribution: -Return air ducts Est. total In ft No. locations inspected Specify fjpe (circle): g et I fibrous glass lined mew masosuv fibrous glass flex-duct wo p • — Return air plenum Est. total RA plenum areas I 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 Nr Est, total qty No. locations inspected — Return air grilles Est total qty No. locations inspected

NYC-WTC 000135444