HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document V IMUMB ~s~ ec;ron rorm Page 1 of 1 Mechanical Exhaust System Identification: • t►fEC tANJCAZ ldjfkAtJ 1 rAPJ Location: txt: - 2t;cf 3 ^. KL Area Served: sTizEE • Associated mechanical room: clean Y N dry Y N stored chemicals/refuse Y N System Components Surface Component [NOTE: If component notpresent (N'P)+ not found (NF) WTC indicate in last column] or Inaccessible m please Debi • not present • not found Present? Present? Exhaust air outlet: Location: • inaccessible

Accessible for inspection? Y =(eXplain):

— louvers. grates and/or screens y — outside air duct — outside air damper(s) P Exhaust fan unit: N — blower assembly ind. blower wheel, housing, air vanes, in-line noise attenuators — blower housing acoustical lining — vibration collars y Exhaust air distribution: N — Exhaust air ducts Est. total In ft 6c No. locations inspected 1 Specify type (circle): amsonrv fibrous class board x u wo Y — Accessible in-line fire dampers Est. total qty 5 _ No. locations inspected 4 — Accessible turning vanes Est. total qty No. locations inspected — Exhaust air grilles !J P Est. total qty_ No. locations inspected d Other (specify):

Other

General impression (indicate recommendations for cleaning based on finding of WTC dust): M Vq , C 40 W& 6psc i 1.3 —r F s of r4 4 Ako , , St' %K Amin `t-"cu; - t- SOME Aim E 4P1 To C "t,73AS t-tADt, ?T WTC sT is Pt~~St.NT X111C CAE O tN T fE- 17t:CTWGk►K.

CI.4ANray *Q w C pEaRS I ii6t' A;0(-0

s C XAP J —r4 C)X+tALST M4 ) tr two ITS A3sCCJATE-D DuCT&ZOQK•

KEY: NP = not NF = not found: I = inacceccihTP• TT =

NYC-WTC 000135472