HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document _ Mechanical Exhaust System Identification ^— Page 1 of 1 - M 666 krQ t Ca4 t, E X~-i A uS'Y N Location: I Area - CC - 'Pc•Q4 - -3•C >alLFANI STREET ST N • I ggThEoeru Associated mechanical room: clean Y N di Y N stored chemicals/refuse Y N System Components Surface Component (NOTE: if component notpresent (NP), not Dust/ Dust • not present found (NF) or inaccessible (1) please Debris indicate in last column] Dust Present? Present? • not found Exhaust air outlet: Location: • Inaccessible

Accessible for inspection? Y....,/N_ (explain): — louvers, grates and/or screens — outside air duct — outside air damper(s) ~a Exhaust fan unit: — blower assembly incl. blower wheel, housing, air vanes, in-line noise attenuators — blower housing acoustical lining — vibration collars Exhaust air distribution: — Exhaust air ducts Est. total in ft 12 No. locations inspected Specify type (circle): +ious ¢lass lined me ~ soy fibrous elass board ex-ducwQQd — Accessible in-line fire dampers Est. total I qty 6 No. locations inspected C. t — Accessible turning vanes Est. total qty No. locations inspected — Exhaust air grilles Est. total 9t}' P's ~' No. locations inspected D Other (specify):

Other Information:

General impression (indicate recommendations for cleanin .~ 4vi C roc--$e a AS c. ~sSc .v~p t,,; - based on fndin of WTC f c ct-+ Pc E ►.s'i S dust C 'TV4 E ;A 9? LO w `# fit G LGv y S A Nlb

a 't &f % tom; A rD tN me .

R Ci eAN1Hc X A vS-r t3 AJTT , 1T5 As tx-t RAE O DucTWOC vC.

: rrr = not NF = not found; I = inaccessible; U =

NYC-WTC 000135468