2.3 Central ventilation systems (coAf TACHMENT A - SCOPE OF WORK
DustlDirt/Debris Suspect WTC-Related Dust
Estimate % of total dust
loading
System Light Heavy
Component (<1/16 inch (a1/16 inch Present?
System Components Substrate Material None depth) depth (YIN)
Outside air intake louvers, grates
and/or screens •.
Outside air duct
Outside air damper(s) C
Return air grilles
Return air plenum
Rerum air plenum damper
Return airducts
Turning vanes
Mixing chambers
Filter rack(s)
Filter banks/media
Pre-heat coils
Cooling coils
Re-heat coils
Humidification and/or air cleaning
equipment
Firc dampers
In-line to-heat coils
Acoustical blower housing lining
Duct connectors
Blower assembly including blower
wheel, blower housing, air vanes, in- —
line noise attenuators, acoustical
treatments (e.g. baffles, duct linings)
Condensate drain par
Condensate accumulator
Supply air plenum
Supply air plenum damper(s)
Supply air ducts ?/
-High pressure - main trunk
-Low pressure— branches
Supply plenum or supply duct
linings
Supply air duct damper(s)
Supply air diffusers
Terminal-boxes - - . -I . - ..
Open or ducted passive ventilation
shaft(s)
Other Information:
fl Unit cycled prior to inspection Color of Dust/Dirt/Debris
Filter loading (general impression) Water damage
Filter bypass (describe) I Visible suspect mold growth
Abraded.'delarrdnated acoustical lining Evidence of animal incursion (carcasses, feathers, fecal
matter)
NYC-WTC 000118880
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000118880Source: NYC Law Department, mirrored locally