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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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NYC 9/11 Public Portal Document

• 2..4 Passive Shaft/Duct Visual Inspection Form Page 1 of 1 Passive Shaft/Duct Identification: Location: Area Served: ~Ot= Surface Component System Components Dust/ NNTC l; not (NOTE: if component not present (NP), not found (NF) or inaccessible (I) please Debris Dust present indicate in last column) Present? Present? 4 not found 4 Outside air intake (if servicing supply air): Location:

Accessible for inspection? Y N (explain):

louvers, rates, screens or weather ca Exhaust outlet/louver (if servicing exhaust air): Location: 0,t Accessible for inspection? Y t/ N (explain): y A.J

louvers, grates, screens or weather cap 1%.) Supply air distribution (if servicing supply air): Supply air outlet(s) Est. total qty No. locations inspected Specify shaft substrate (circle): metal fibrous glass lined metal masonry fibrous glass board flex-duct wood

Accessible fire dam ers Est. total No. locations ins ected Pipes/mechanical equipment, etc. located in shaft P Return air distribution (if servicing exhaust air): Exhaust air inlet(s) Est. total qty_5— No. locations inspected Specify shaft substrate (circle): meta fibrous-Klass lined metal masonry '/ i rous lass board flex-duct wood Accessible fire dam ers Est. total No. locations ins ected N Pi es'mechanical equipment, etc. located in shaft NP Other (specify):

Other Information:

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

NP =no: .iresent; NF = not found; I = inaccessible; U = unknown

NYC-WTC 000133641

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NYC-WTC_000133641Source: 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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