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HVAC consulting services invoice, NYC WTC site, 2003

Machine-extracted title · confidence 95%

Invoice for HVAC consulting services provided at the World Trade Center site in 2003.

NYC-WTC_000135339–000135553
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Scanned page image, NYC-WTC_000135355
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NYC 9/11 Public Portal Document 33 Central ventilation systems (cotlTTACHMENT A — SCOPE OF WORK

•' Dust/Dirt/Debris • Suspect WTC• elated Dust Estimate %•of total dust loaning System Light • Heavy • Component • '(<1/16 inch (21/18 inch Present? System Components Substrate Material None . depth) depth • (Y/N) utside air intake louvers, grates and/or screens Outside air duct Outside air,damper(s) Return air grilles X Return air'plenum'. • - Return air plenum damper • Returri air ucts • • urning vanes Mixing chambers '. Filter rack(s) . FilterbthksFrnedia Pre eat coils Cooling coils Re-heat coils Humidification and/or air•cleaning equipment Fire dampers In-line re-heat coils Acoustical blower housing lining Duct connectors Blower assembly including blower • wheel, blower housing, air vanes, jn- line noise atteruators, acoustical treatments (e.g. baffles, duct linings) Condensate drain pan S ( I Condensate accumulator Supply air plenum Supply air plenum damper(s) Supply air ducts .. . S .

- igh pressure. main trunk •- -Low pressure — branches Supply plenum or supply duct linings Supply air duct damper(s) Supply air diffusers ( • Terminal-boxes - - - Open or ducted passiveventilation -

shaft(s) Other Information: Unit cycled prior to inspection Color ofDust/DirtfDebris Filter• loading (general impression) Water damage Filter bypass (describe) Visible suspect mold growth Abradedldelaminated acoustical lining' Evidence of animal incursion (carcasses, feathers, fecal matter)

NYC-WTC 000135355

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NYC-WTC_000135355Source: NYC Law Department, mirrored locally

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