HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document 2.4 Passive Shaft/Duct Visual Inspection Form Page 1 of 1 Passive Shaft/Duct IdeWil11cation: J tt-vA'1 C,oi4 A() '(( /(4TAKt Et A0 Location: 2.O S' H ts, A Et:E r A'to ^s. ' c&( Qcc Area Served: tjVA T a ~' r1 System Components Surface Component Dust/ WTC • not present [NOTE: if component not present (NP), not found (NP) or inaccessible (I) please Debris Dust indicate in last column] • not found Present? Present? • inaccessible Outside air intake (if servicing supply air): Location: Accessible for inspection? Y ____(explain):

— louvers, grates, screens or weather cap Exhaust outlet/louver (if servicing exhaust air): Location: Accessible for inspection? Y N (explain): ll tv — louvers, grates, screens or weather cap Supply air distribution (if servicing supply air): — Supply air outlet(s) Est. total qty No. locations inspected Specify shaft substrate (circle): nja fibrous glass lined metal na y fibrous glass board flex-duct ww — Accessible fire dampers Est. total qty No. locations inspected — Pipes/mechanical equipment, etc. located in shaft Return air distribution (if servicing exhaust air): — Exhaust air inlet(s) Est. total qty No. locations inspected Specify shaft substrate (circle): meW fibrous glass lined metal masonry fibrous glass board pct ww — Accessible fire dampers Est. total qty No. locations inspected - Pipes/mechanical equipment, etc. located in shaft Other (specify):

Other Information:

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

-~C CaANI)JCq tS D AS c~$S £dam► Nn WTC EL'\Z D

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

NYC-WTC 000135539