HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document ivmcnamcai rxnaust system laentncatton:

Location: Area Served:

Associated mechanical room: clean Y N dry Y N stored chemicals/refuse Y N System Components Surface Dust/ WTC f . Component not present [NOTE: if component not present (NP), not found (NF) or inaccessible (I) please Debris Dust . not found Indicate in last column] Present? Present? a inaccessible Exhaust air outlet: Location:

Accessible for inspection? Y ✓ N (explain):

— louvers, grates and/or screens — outside air duct — outside air damper(s) r;

Exhaust fan unit: — blower assembly incl. blower wheel, housing, air vanes, in-line noise attenuators a

— blower housing acoustical lining — vibration collars Exhaust air distribution: — Exhaust air ducts Est total In ft ) UV No. locations inspected C' Specify type (circle): metal s lass Iined metal [ ,.% fibrous class board flex-ductw — Accessible in-line fire dampers Est. total qty No. locations inspected P — Accessible turning vanes Est. total qty No. locations inspected — Exhaust air grilles Est total qty f. 9 No. locations inspected 0 Other (specify);

Other Information:

General impression (indicate recommendations for cleaning based on finding of WTC dust):

No LbiiC fzz1 ciic--i ►au 1 %4A3 Pas vrni 1ti T4-1E CcMpl-&&A iS eF

146 -TA tJ A 1J! Pt -r "D uc_-T

KEY: NP = not present; NF = not found; I = inaccessible; U = unknown

NYC-WTC 000135503