Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ASSOCIATES -- TEM ANALYSIS ATC INC. LAB GROUP it 5761 - 10/25/01 Operator. Filter Type MCE 25 mm Lab Sample No. 62183 mm"2 '-4/~ Filter Area 8 Disk No. tM r/ J Client Sp1. No. 10 Grid I.D. Comments Instrument I.D. EM_1 ~O RX (GO) Area 0.011 CorsPd to 70 s/mm~2- ~ 4 721 Struct Screen Magnification 16 400X 6 No. GO to be Analyzed 80 kV EDS Ar c. Voltage (Nonasb. I.D. of Structure Nor Length g Elements GO. Structure structure Type um Am hibole Nonasb. Ambi /ND gum Chr s. No Coord. No. F B C M < 5 u

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I I I LITii II!!" udn 8D3 Check a11 re . - iiz " '(1st 4) ( asbestos- Identity all structures structures u to 70s tiPnm (from 1 in 5 Grid acceptance: r over apps or o e O t rdl `Photo No. undlssalve cantaining samples) <5OX coverage >50X coverage guavas 5:1 Aspect Ratio <10% particulate overlapped grid F B C M Sum Strvet ' > O.Sum ae > flora) at least 20 unfolded or or diffraction Pa or o a ue areas spectrum <5X holes N. Not Observed (RUS esnrormins Unused portion positive diffraction pattern Prepsrtiwe criteria observed. of fitter Cllrysotlle idenUrication to laboratory ,enaction' Avoided poNoa

I Par em ep oof°(110 Ulr. tool ' and mac(as ( 0.TJnm asaotnt ror (020) stneama far the taper ens repeat. ) renscU000. 0.40em for amPhl{glos: -locoed talar 5 r tin o[ pen spur Use raP`aL sad approa. spade[ to Portion of altar aubJect examination at niter ( ni dde) Amphibole

layer nm). Ambiguous laboratory AMPIIH0LEs 8Dy spectrum conforming to observed. Alnoette ldenUflc*Uon criteria lntareecLLen■ = 1-3 nbers) 25mm niter CrOCldOlite Non —asbestos Fa ideals f/ber (1-3 diameter apart) Anthophyllite t>3 fibers <1 fiber e= Bundle,. S„ intersections) Slo7pina ole,. T~.molite 'Ter-Trjentified

NYC-WTC 000104194