HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document 2.2 Mechanical Exhaust System Visual Inspection Form • Mechanical Exhaust System Identl5cation: Page I of 1 H&.N MulcAt. EP ub 4.n 4~' Location: Area Served: Associated mechanical room: clean Y N dry y N stored chetnicalslrefuse Y N System Components Surface Component [NOTE: if component not present (NP), not found (NF) or Inaccessible (I) please Debris TC • not present indicate In last column) Dust • not found Present? Present? • Exhaust air outlet: inaccessible Location: Accessible for inspection? Y N (explain): — louvers, grates and/or screens — outside air duct — outside air dampers) Exhaust fan unit: N ~? — blower assembly Incl. blower wheel, housing, air vanes, in-line noise attenuators — blower housing acoustical lining — vibration collars Exhaust air distribution: — Exhaust air ducts Est. total In ft rbr) — No. locations inspected Specify type (circle): ~sogry fibrous glass board flec4ci we — Accessible in-line fire dampers Est. total qty IS lV No. locations inspected D ( — Accessible turning vanes S Est. total qty No. locations inspected — Exhaust air grilles Est. total qty_j No. locations inspected Other (specify):

Other Information:

;eneral (indicate recommendations for cleaning based on finding of V.TC dust): impression~ — ND VD W TC• ' i..A t 't~D '! S't' WA 3 O9 s ep_ CM f 1~ " 1 t9NfT A-~.D ITS J'i u~7- t„ o zlC,

k iS t cat ,Nc? ?4N t5 ,.j(S E 4?.J ~rp C'.c-~-i 11i Q 1s e? v

NP = not present; NF = not found: I = inaccessihte! it =

NYC-WTC 000135467