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Invoice for HVAC consulting services, April-May 2003

Machine-extracted title · confidence 95%

Invoice submitted for professional engineering services related to HVAC consulting and oversight of World Trade Center evaluation and cleaning.

NYC-WTC_000133898–000133963
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NYC 9/11 Public Portal Document

2.2 Mechanical Exhaust System Visual Inspection Form 'Pon*' I „c, Mechanical Exhaust System Identification: Location: n Area Served:

Associated mechanical room: clean Y N dry Y N stored chemicals'refuse Y. N Surface Component System Components Dust/ WTC F not (NOTE:,if component riot present (NP), not found (NF) or inaccessible (I) please Debris Dust present indicate in last column] Present? Present? not t found • l; Inaccessible Exhaust air outlet: Loc tion:

Accessible for inspection? Y I N (explain):

louv0 s, grates and/or screens n outside air duct outside air damper(s) N n

Exhaust fan unit: blower assembly incl. blower wheel, housing, air vanes, in-line noise attenuators blower housing acoustical lining N vibration collars Exhaust air distribution: N n Exhaust air ducts Est total In ft 3O No. locations inspected _ Specify type (circle): metal fibrous class lined metal masonry fibrous class board flex-duct wood

Accessible in-line fire dam ers Est. total ty 7 No. locations ins ected •i Accessible turning vanes Est. total gty No. locations inspected ,J p Exhaust air illes Est. total No. locations ins ected Other (specify):

Other Information:

General impression (indicate recommendations for cleaning based on finding of \\'TC dust):

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

NYC-WTC 000133954

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NYC-WTC_000133954Source: NYC Law Department, mirrored locally

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Cole Consulting identifies impacted HVAC units at 50 [Street] requiring cleaning due to WTC dust found during a February 2003 inspection.

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