Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

1 TEM ANALYSIS ATC ASSOCIATES INC. - LAB GROUP # 5 5- - 10 25 O1 !/ Operator Filter Type !^•C= 255m Lab Sample N 62222 Filter Area 3B mm2,,_ 1 \\ )) Disk No. Client Spl. No. 8 SS Grid I.D. Instrument I.D. EM 10 CRX Comments (GO ) Area - 2 0.0' to 70 s;mm"~ Screen Magnification l0 400R 4.721 Strucc. Cors d. No. Go to be Analyzed 6 Acc. Voltage 0 kk V EDS th I.D. of Structure N °r ✓ (Nonasb. Structure Structure Type Len g X

I GO. Coors. No Co No. F H C M 0.5 um < 5um >, 5urn Chr s. Amphibole Nonasb. Ambig./ND Element.

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I ■_—....--_ -- v*.m~i11 2DS t:Reex au.r...-- •- Identify all dtruetures usin r~m (let 4) No. from 1 1n 5 aebestoe- G acceptance: str uctures u orto oToea ~ta1S undiseolve r, overlapped containing sampled) < coverage >5ap 0% coverage Ratio <10% particulate squares C um Strucc = > 0.5um & > 5:1 Aspect at least 20 unfolded or overlapped g 9 F B lyl to pattern) spectrum or diffraction <5% holes or opaque areas No Not Observed (SOS properties conforming Ufuaed portion positive diffraction pattern criteria observed. of niter Chrysotile to laboratory identification for (020) reflectional

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ror .~acfn~ for the laysr 'ins of (l p) and (100) refleclsns• amphlbel $.a ratio at non o 0.73nm spaofag

0.0.1em -twinned repast.

pyar itne repast. dreaktnl sad approa. layer line .pat epaalog to Poruan et filter eubJect b e4nrinallan avoid of niter (Pram ~■) portion Amphibole

►yar It., repeat distance (0a3am)• Ambiguous U ic~Uon are AMPHIBOLES Crum conforming to laboratory rum con f o rming ia laboratory SOS a idenU criteria observed. iden inter+ecuon■ - 1-9 fibers) 25mm nits C roe id olite Non —ggbestos F= single Fiber (1-3 fibers ct fiber diameter apart) Anthophyllite B= Bundle (> Intenectlanf) sbppioa gain: u■ter (>s3 C= Cluster .. 9 TrPmolite ,•,,.. _irr=ntified NYC-WTC 000104100