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Invoice for HVAC consulting services, April-May 2003

Machine-extracted title · confidence 95%

Invoice submitted for professional engineering services related to HVAC consulting and oversight of World Trade Center evaluation and cleaning.

NYC-WTC_000133898–000133963
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Scanned page image, NYC-WTC_000133919
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NYC 9/11 Public Portal Document

2.3 , Central entilation systems (coA•t TACHMENT A -"SCOPE OF WORK

r Dust/Dlrt/Debrls Suspect IYTC-Related Dust Estimate %•of total dust System loading Light Heavy Component (<I/16 inch (k 1/16 inch Present? System Components. Substrate Material ' None depth) depth (YIN) Outside air intake louvers, grates and/or screens• fJ Outside air duct' Outside air dampers) - Retum air grilles' ' ' Re:utrs air plenum " Return air plentini damper Return air ducts Turning %lies . : • • . ' Mixing chambers ' Filter rack(s) . ; Filter banks/media Pre-heat coils );j ••• 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 assein iy including blower ' wheel, blowerhousing, air vanes, in- ~.. line noise atteruators, acoustical treatments (e.g. baftles,duct linings) . • . Condensate drain pap " ' Condensate accumulator " ' • .Supply'air plenum ' Supply airp enure damper(s) Supply air ducts -High pressure -main trunk -Low-pressure — bfanches Supply plenum or supply duct linings ' y~ Supply,air duct damper(s) • Supply air diffusers • . - Terminal-boxes - , Open or ducted passive ventilation . shaft(s). Other Information: Unit cycled prior to inspection : Color ofDust/DirttDebris Filter loading (general impression) 0 Water damage •. , Filter bypass (describe) • Visible suspect mold growth ' Abraded'deIarhinated acoustical Iining .Evidence of animal incursion (carcasses, feathers, fecal matter)

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NYC-WTC_000133919Source: NYC Law Department, mirrored locally

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NYC-WTC_000133762 · Box DEP Box 55

Cole Consulting identifies impacted HVAC units at 50 [Street] requiring cleaning due to WTC dust found during a February 2003 inspection.

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