HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document Mechanical Exhaust System Identification: - - - --~~ w •~ rage 1 oil & wiat _ £x, A u$T F A'J ~f IC1 Location: Area Served: fl '2v'- - A lENS 4 Associated mechanical room: clean Y N dry Y N stored chemicals/refuse Y N System Components Surface Component (NOTE: if component not present (NP), not found (NP) or inaccessible (1) Dust! WT • not present indicate in last column] please Debris P Dust • not found Pre Present? Exhaust air outlet: - Lovation: •• Inaccessible / Accessible for inspection? Y J N (eXpI~):

— louvers, grates and/or screens — outside air duct — outside air damper(s) Exhaust fan unit: p n` — blower assembly Incl. blower wheel, housing, air vanes, in-line noise attenuators — blower housing acoustical lining — vibration collars Exhaust air distribution: Nt_ — Exhaust air ducts Est, total in ft _ No. locations inspected L Specify type (circle): o11ss class linedu a gasqxu fibrous glass board fl x-duct w Y — Accessible in-line fire dampers Est. total qty_ No. locations inspected G, — Accessible turning vanes Est. total qty No. locations inspected — Exhaust air grilles ti r' Est. total qty '.7 No. locations inspected ~• Other (specify):

Other Information:

General impression (indicate recommendations for cleaning based on finding of WTC dust): vc G C.BS"VeD. it3 T4{E c c cc 'TAE FAhj - ANA r3(2.Cw `Th( •Lec.:ti•t RS

+.. vti C IN ia zi'I w AS C i5c-Cti' i-O + i7 -r+IE f) L) .c.:c.i;K ,

CLE-A+v, NC, • Ft j •WYG..r*LS 1S ewESa•

st txx.c-AN :'ti& EXHALS i FAN VtJ#T ,nAi.7 t7S j{S5t<1AThlD nt'YL...c•RK.

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

NYC-WTC 000135477