HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document ------ -• Vs 1 echagical Exhaust System Identxficatio

L.ocation• fi Area n•ed: - ' ti Ait-i I {~' ' K - ~"~L tCTe✓~ Rt e' ' SCI r ~v> Associated mechanical room: clean Y N dry N stored chemicals/refuse Y N System Components Surface Component Dust/ WTC • not present [NOTE: if component not present (NP), not found (NF) or inaccessible (I) please Debris Dust Indicate In last column) • not found Present' Present? • inaccessible Exhaust air outlet; Location: Accessible for inspection? Y_/N (explain):

— louvers, grates and/or screens — outside air duct f\J ___________

t — outside air damper(s) Exhaust fan unit: — blower assembly incl. blower wheel, housing, air vanes, in-line noise attenuators \ ) T\J — blower housing acoustical lining — vibration collars Exhaust air distribution: — Exhaust air ducts Est. total in ft 3 C, t No. locations inspected : Specify type (circle): , e ' ) fibrous class lined metal unsoiny fibrous glass board flex-duct w N. — Accessible in-line fire dampers Est. total qty No. locations inspected NP — Accessible turning vanes Est. total qty Ci No. locations inspected CA — Exhaust air grilles Est. total qty ? . Z No. locations inspected Other (specify):

Other Information:

General impression (indicate recommendations for cleaning based on finding of WTC dust): "" t'fC% E-tA}c,-t) 'D- St (,t 3 C''i;Si ,v'tfl I-T L~t{F'cr.:Er.fi S L+V̀TC. ~~c r5+ Ct 7HE FAN Ar.,.4 ITS •,~ystc ,i- z Ir 1' .i 37 / ~~~. t 'fir . to r --- N C'CC ti ! ci ! 3 h

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

NYC-WTC 000135498