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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

2.1 Central Ventilation tern Visual Inspection Form Ventilation System ldentification: ` ~} Pa Location: to 115 — P11 Area Sen•ed: APPT r33y Associatedmechanical room: clean I Y N dry V 1' 1\' stored chemicals/refuse iy V N System Components (NOTE: if component not presen t (NP), not found (NF) or Surface Ce DusU ~ indicate in last column] inaccessible (I) please D bris 4 Dust Present? Pr Present? to E Outside air intake: Location: ina Accessible for inspection? Y N (explain):

lou •ers, grates and'or screens outside air duct outside air dam er(s) Air handling unit: outside air mixing chamber filter r ck(s) filter media Af blower assembly incl. blower wheel, blower housing, air vanes, in -line N noise attenuators -f— blower housing acoustical lining re -heat coils heating coils cooling coils re -heat coils co'idencate drain an su 1 • air lenum supply air plenum damper(s) vibration colla rs N Supply air distrib u tion: N Supply air ducts Est. total In ft /p() No. locations inspected Specify type (circle) meta ibrouc glass lined meta masonry fibrous ¢lass board

Accessible in-line fire dam ens Est. total [ Accessible turning vanes No• locations ins ected Est. total No. locations ins ected In -line reheat'cooling coils Est. total No. locations inspected Su lv- air diffusers Est. total No. locations inspected Return air distribution: •2 N Return air ducts Est. total In ft__j, __ No. locations inspected_ Specify t}pe (circle): metal fibrous ¢lass lined metal masonry fibrous class board flex -duct wood y ri Return air plenum Est. total RA I plenum areas I locations ins ected No• Return air plenum damper Est. ins ected total qty _ No. locations 'Accessible ii-line fire dampers Est. total qty locations ins ected No --- NP

NYC-WTC 000133631

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NYC-WTC_000133631Source: 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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