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Document / 13 pages

HVAC Cleaning Recommendation Memo, 50 [Street], Feb 2003

Machine-extracted title · confidence 90%

Memo from Cole Consulting recommending cleaning of HVAC components at 50 [Street] following visual inspection for WTC dust in February 2003.

NYC-WTC_000133629–000133641
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Scanned page image, NYC-WTC_000133633
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NYC 9/11 Public Portal Document

2.2 Mechanical Exhaust System Visual Inspection Form Mechanical Exhaust System Identification: Pa e I of I 3oIL n 12.rl g4Q N 1Aie- Location: n Area Served: J to a Associated mechanical room: clean Y N dry Y N stored chemicals/refuse Y, N Surface Component (NOTE: if component not present (NP), not found (NF) or inaccessible (I) Dust/ WTC 4 not please Debris Dust present indicate in last column ~ Present? Present? found

Exhaust air outlet: inaccessible Location:

Accessible for inspection? Y_/ " N (explain):

louvers, grates and/or screens outside air duct outside air damper(s) Exhaust fan unit: N blower assembly incl. blower wheel, housing, air vanes, in-line noise attenuators blower housing acoustical lining N P vibration collars Exhaust air distribution: _ tJ Exhaust air ducts Est total In ft 3 0 No. locations inspected Specify type (circle): meta fibrous glass lined metal flex-duct wood masonry fibrous glass board 7 y Accessible in-line fire dam ers Est. total No. locations ins ected Accessible turning vanes N _ Est total qty No. locations ins ected Exhaust air grilles N Est. total gty No. locations inspected Other (specify):

Other Information:

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

VJ L bLL5 vt-1 N lJ t N 5yS i c/ -t . CL~,.i,n/( IS ~or1M~✓/J~c,Jj .

I I:EY: NP = not present; NF = not found; I = ; J= unknown !

NYC-WTC 000133633

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NYC-WTC_000133633Source: NYC Law Department, mirrored locally

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NYC-WTC_000130428 · Box DEP Box 53

Memo from Cole Consulting Corporation recommending no HVAC cleaning at a building on the WTC site due to lack of WTC dust.

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