Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ANALYSIS I ATC ASSOCIATES INC. — TEM 10/25/01 LAB GROUP #: 5762 - Operator Filter Type MC£ 25 mm Lab Sample No. 62219 Filter Area 385 mm"2 Client Spl. No. 5 Disk No . Grid J.D. Instrument I.D. EM 10 CRX Comments GO Area M~~ 400X to 70 s/mm"2.' Screen Magnification 16 6 i q 7''1 Struc Corspd No. GO to be Analyzed Acc. Voltage 80 kV EDS Structure Type Length g I.D. of Structure Nor ✓ (Nonasb. GO. Structure X0.5 um Amphibole Nonasb. Ambig./ND Elements! No Coord. No. FIB C M C um >. 5um Chr s.

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1 Photo No. from 1 In 5 asbestos— containing samples) Slruct. = > 0.5um & > 5:1 Aspect Ratio Identify all structure' min BDS Grid acceptance: <507L undissolve tar, Check diefru tip 70r as ucs (ld 4) overlapped or fold0 <10% part[culata coverage >50% coveragesquare pattern) at leant 20 unfolded or overlapped grtd TQta S 1

C > 5um M. Not Observed (SOS spectrum or dlffraaLLon <5% holes or o a tie areas F B M properties conforming Positive diffraction pattern Unused portion Chrysotile ✓c to laboratory identification criteria observed. of niter 0.73nm el for (020) rensehons. Av flog pertlea For ebrysoUlof Uno repeat. streaking of 0.53nm spacing for the layer of filter of (110) and (100) reflections. Portion of niter (2mm wide) Amphibole Ua of lss: 0.09am Dyer Ito. rope■1, and a to roe. subject to Use .pot .pain{ to sasminaticn 3.5 reUo of es -twlnead V (.sanm)• layer line repast distance Ambiguous conforming to laboratory AMPHIBOLES ✓' EDS spectrum criteria observed. identification Amosite F= Single Fiber (1-3 intersections = 1-3 fiber.) zemm ratter Crocidolite Non — asb estos !tsar diameter apart) Ba Bundle (>3 fibers <1 Anthophyllite C= Cluster (>9 lntar cUons) Stoppi ng Ru les. _ ^ , ^.. o

NYC-WTC 000104097