NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS GF-CU? 4

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GO. Structure structure Type Length I.D. of Structure EDS >0.5 um (Nonasb. No, Coord. No. F B C M Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

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( Photo No. (from 1 in S asbestos- Illi Identify all structures using EDS Check diffraction for aabesLoa Store ail unrepeated spectra containing samples) Grid acceptance: I structures up to TOs/ifim (1st 4) Struct. = > 3.Sum Jc > 3:1 Aspect Ratio <S0X undiaaolvea filter, overlapped or folded <10X particulate coverage >50X coverage N= Net Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals. Positive diffraction pattern properties conforming <SX holes or opaque areas____________________ F B C M > Sum to laboratory Identification criteria obaervad. Iau*<d portion For ebrysoUle: Q.TSnni asaeing for (02(1) rsflactlon*. of niter Chryeotile 0.&3am spacing for the layer line rspoat, aLrsablng I Cad portion of (110) and (130) r«n«cUona. or niter Fer amphlbeios: O.S3nm layer 11ns repoat. and appro*. Portion of niter (2mni Vido) 3.3 ratio of non-Lwlnned layer line spot spacing to aubjeet to ■MnunaLian Amphibole layer line repeat distance (0.33nm).

v/. EDS spectrum conforming to laboratory identification criteria observed. ! AMPHIBOLES [ Ambiguous Ps single Fiber (1-3 Intersections a 1-3 fibers) Amoatte as Bundle (>3 fibers <1 fiber diameter apart) ZSmm nilar Crocidolite ; Non-asbestos C= Cluster (>3 IntarsecUens) Ms Matrix ----------- 3tappln< RuIm i----------- Anthophyllite I >50 ./C O. or In lol 4 S.O. I HSOs Mo Structure* Detected i Non-Identified [ L\DATA\PRIVAT8\MIKSC\CAD0\nM3 S/22/M

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