HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document

Page 1 of 1 2.2 Mechanical Exhaust System Visual Inspection Form Mechanical Exhaust System Identification: n Location: I 40 Area Served: £ c • Ito • i ?cY N dry Y stored chemicals/refuse N Y N Associated mechanical room: clean Y Surface Component Dust! WTC • not present System Components Debris Dust • not found please [NOTE: if component not present (NP), not found (NF) or Inaccessible (1) 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 Nt — vibration collars i' Exhaust air distribution: — Exhaust air ducts Eat total In ft li+b No. locations inspected___ Specify type (circle): (ty g~1} fibrous ales lined me ~gdao fibrous alas board 1--'' flex-duct wo . — Accessible in-line fire dampers Est. total qty_. No. locations inspected — Accessible turning vanes Est. total qty No. locations inspected 14? — Exhaust air grilles Est. total qty No. locations inspected Other (specify):

Other Information:

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

._-4p t+A.0 M u c.A-f c c IJ cc t'?L S 1'3 C O v e•r ►u re to . L ct.~-.I 1 d_ U %AHllsS C• t:.A ~ 0 w~1 -+ L e c C01-tt'D9J&PJTS C & T4 - 1E cHAUST 1 'J -AEON" WIT-4 1-rS At IT5 7A.9 jf 7 2)UC TS .

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

NYC-WTC 000135533