HVAC monitoring addendum to scope of work, August 2002

NYC 9/11 Public Portal Document

Other Information:

I Unit cycled prior to inspection______ □ Color of dust/dirt/debris Filter loading (general impression) Water damage______________________________________ Filter bypass (describe)____________ n Visible suspect mold growth Abraded/delaminated acoustical lining r~l Evidence of animal incursion (carcasses, feathers, fecal mat^ General Impression:

2.2 Fan coil/ heat pump units in common spaces

Ventilation System Identification: Location: Access adequate for inspection of components: Dust/Dirt/Debris Suspect WTC-Related Dust System Component None Light Heavy Present? Estimate % of total dust Substrate Material (<I/16inch (i 1/16 inch (Y/N) loading (sheet metal wrapped) depth) dq)th System Components (sheet metal lined) (fiberglass) (flexible connector) (double walled) Return air grille Return air plenum Filter rack Filter media Blower assembly Thermal colls Supply air plenum Supply air diffuser Other Information:_________________ r i Unit cycled prior to inspection □ Color of Dust/Dirt/Debris rj Filter loading (general impression) O Water damage □ Filter bypass (Ascribe) □ Visible suspect mold growth □ Abraded/delaminated acoustical lining Q Evidence of animal incursion (carcasses, feathers, fecal matteU General Impression:

2.3 Central ventilation systems

Ventilation System Identification:

Location: I Area Served: Mechanical room: clean Y N dry Y N stored chemicals/refuse Y N Access adequate for inspection of components: AHU interior surfaces are visibly accessible:

NYC-WTC_000163410