HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document Tr:- -I T___ -mot_— Page 1 oI 1 L.L lyiecultilitall L' aliilua► ►7 asc,u . ,,awa

Mechanical Exhaust System Identification: A 2J Location: Area Served:

Associated mechanical room: clean_EY N dryjL —Y stored chemicals/refuse N Y, e N Surface Component System Components f Dust! WTC • not present Debris Dust • not found [NOTE: if component not present (NP), not found (NF) or inaccessible (I) please I Present'' pm ► Indicate In last column) • inaccessible 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 — vibration collars F'+ P Exhaust air distribution: — Exhaust air ducts Est total In ft ( 0P No. locations inspected 02- Specify type (circle): et t~ ~rrot s,rlass lined metai ~ glass board flex-duct d — Accessible in-line fire dampers Eat total qty ^ No. locations inspected U — Accessible turning vanes Est. total qty No. locations inspected NP — Exhaust air grilles Est. total qty No. locations inspected 0 Other (specify):

Other Information: i l

General impression (indicate recommendations for cleaning based on finding of WIC dust): WAS 0S s 6R.Nt? fN T+fE M ecfIAN l CA L CoMPt, JE-mss -- WTC £ u ST A,N D , ('r s & C? C t A'T '€-7D T u C-TS . -- C-4..E-,aN~NE 'IS '&c,)ul:e3. Fs.flR WTC.. E L4T1 VU31'. `The HC C+IA lv I CAL Ca wPo c-?uTS off' -rte- vF##j AN D ASoc. A're b 7uC.TS , Ej: 'T o "&t CLfcfl-N:.D.

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

NYC-WTC 000135385