HVAC consulting services invoice, NYC WTC site, 2003

NYC 9/11 Public Portal Document i•7 A YJJ•V4 V •OMN UM wbv a v. s

Passive Shaft/Duct Identification: T s l E SH A 19 ► - A0o At8/w f sTb 1 Location: Area ed: ~,#.{~ 4 ., D BCD^vN S } Surface Component System Components Dust/ WTC • not present [NOTE: N component not present (NP), not found (NF) or inaccessible (1) please Debris Dust • not found indicate in last column]- Present? Present? a inaccessible Outside air intake (if servicing supply air): Location:

Accessible for inspection? Y V N (explain):

— lowers, grates, screens or weather cap _ Exhaust outlet/louver (if servicin exhaust air): Location:

Accessible for inspection? Y/N (explain):

— louvers, grates, screens or weather cap Supply air distribution (if servicing supply air): — Supply air outlet(s) Est. total qty tO No. locations inspected 3 Specify shaft substrate (circle): t) fibrous class lined metal masowv fibrous glass board f — Accessible fire dampers Est. total qty No. locations inspected 3 — Pipes/mechanical equipment, etc. located in shaft Return air distribution (if servicing exhaust air): — Exhaust air inlet(s) Est. total qty I E) No. locations inspected_ Specify shaft substrate (circle): ( ) fibrous class lined metal masc fibrous glass board flex-duct wo — 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): ti'a W1"G dust Wcro O bsuve' (- QuIED F WTC 'r3&t ' tD (sf 0 CL~AiJ ? t 4 1

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

NYC-WTC 000135441