Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS Lac Sample N . .j2=": tip_= Tyoa "'1 a - mr.

__tent Spi No :2 FtL_ar Area 34E mm"

Instrimenc L.D. EM 10 CRX Gr_d ID Dtao No

Screen Magnofication 10,400X. lGO Area C.3I_ mm "- Comments

Acc. Voltage 80 kV No. GG Do be Araiy_ed 4 . " 2 '. :r.:o. rscd " amm'

Length I.D. of Structure EDS GO. Structure structure Type; N or/ (Yonasb. No Coord. No. F B C M >0.5 um 5 um >. 5um I ;Chrys.j Amphibole Nonasb. i Ambig./NDI Elements

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Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra D containing samples) Grid acceptance: structures u to 70s lim (lot 4) <50% undisaolve 1 or, over appe or o1 e Struct. _ 0.5um & > 3:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N- Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or opaque area. 5um to laboratory identification criteria observed. Unused poruon For ehrysoUlei 0.77am speeme for (020) reflections. 0.50em apaatnt; for the layer line repeat. streaking of filter Chrysotile Avoided portion of (110) and (130) reflee units. of filter For amphiboles: 0.53nm layer line repeat and approx. , Portion of filter (2mm .ids) 3.5 mtio of non-tstnned layer line spot spacing to •abject ta Amphibole layer Line repeat distance (0.53nm). eKammauon

/o EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersections - 1-3 fiber.) Axnosite 8= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non-asbestos) C= Cluster (>3 intersections) 'Stopping Rule.: I Anthophyllite i I M= Matrix

I NSD= Na Structures Detected t\DATA\PRlVATE\MIKEC\CAD0\TEM3 >50 •/C.O. or In tit 4 0.0.

0/22/98 TremoliLe Actinolite Non-Identified

NYC-WTC 000104390