HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document 2.2 Mechanical Ea iaust System Visual M~ ~ System Li hsspectjon Form ton Page 1 of 1 N at I*YkA VST F4N 14 Location: E — sour k Area serve8: PINS Associated mechanical roor is clean Y N dryer N stored che ca Y N System Cornponents surface (NOTE: if component not oreseat (NP), not found Compon t Duet/ WTC • not present Indicate in last column] ( or lnaccssible (I) please Debris p g Duet ~ • not found ~ Exhaust air outlet:. Location: • ineccesatble Accessible for inspection? Y~N (explain): — louvers grates and/or seen — outside air duct — outside air damper(s) Exhaust fan unit: — blower assembly incl. t-tower wheel, housing, air vanes, in-line — blower housing acousti+;81 li noise attenuaLors ning vibration collars

— Exhaust air ducts Est :otai In R ~ No. llocations inspected SPsi y *W (arcle): r -~ it t fi>rOus glass ai me naw gIaas bOa

— Accessible in-line fire da *hers Egg total qly_._ _ No. locations insp~d p Accessible turning vanes Est. total qty — Exheast air grilles No. locations inspected Est total No, locations inspected O Other (specify): '----_._

Other Iafortnatinn_ I I I

~+4 E N 1.3 N o ^i t.~ o Epp N C1

General impression (Indira :e recommendations for cleaning based on finding of WTC dust): tQ u Te PJ.L474J 1)vir W4r DBsievEJ gA) Th KtcN4Nrc,$L ectlPcp v73 ,Ama rrs Miss cc, 't L fl 1 c!I L ... O ' 'NW Ig ' 4u, ~ w'r'L -Ec-A1D ~vs?.

KEY: NP'* not present; NP' - not found; I - Inaccessible;. U .. Iowa

NYC-WTC 000135401