HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document

1 of 1 2.2 Mechanical Exhaust System Visual

•ILt Area Served: Location- ~/y £co S' ' ( C"eL~rl`.a Y stored chemicals/refuse N Y N Associated mechanical room: clean Y N dry Surface Component Dust/ WTC • not present System Components Debris Dust • not found (1) please INOTE: if component not present (NP), not found (Ni) or Inaccessible Present? Present? • inaccessible Indicate in last column] Exhaust air outlet: Location:

Accessible for inspection? Y, ,/ N (explain):

— louvers, grates and/or screens — outside air duct — outside air damper(s) Exhaust fan unit: — blower assembly incl. blower wheel, housing, air vanes, in-line noise attenuators — blower housing acoustical lining NP — vibration collars Exhaust air distribution: — Exhaust air ducts Est total In R ! 4.6 No. locations inspected 1 Specify type (circle): fibrous sixes lined meta )moo fibrous class board flex-duct y — Accessible in-line fire dampers Est. total qty_. No. locations inspected — Accessible turning vanes Est. total qty No. locations inspected jsj? Est. total qty I No. locations inspected O — Exhaust air grilles Other (specify):

Other Information:

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

..— •~(e p ( •t+Lk.:a L4 v LA-f (c 1) O17W "Tt✓ re(oe., cL` .~T t'~ C L~ v E~ ► tl

U, H75- C' cH ~, 0~ ~ 4 4L

LCAM "T1{E )C H AU S T 1fJ 1\ L0 N 4 () 1T4 l -t S CaK t o9J~t~1`i•$ ,&UD IT5 ,A.SSocl PTE)

KEY: NP = not nresent: NF = not found: I : inaccessible: U = unknown

NYC-WTC 000135533