NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS GROUP #: 5769 10'26.' Lal Sanipit Nc. 6252* zer Type M.C5 25 tut Cperac :nc. 3?-. Nc Filcer Area 3.9 5 inm 2

Inacr-amenc :.D. E.M l: . GRX id :.D. Disk, No.

•een Magnification 16 ,. 4OCX IGO/ Area 224 ■Tfr.' Gommer.cs ACC. Voicage 50 kV Nc. GO -o be Analyze: 5 mm'':

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

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LI (O_____ !_______ I___ I ! Photo No. (from i in 5 aabestoa- Identify all structures uaing EDSJ Check diffraction for asbeatoa store ail unrepeated spectra containing samples) Grid acceptance:! structures up to 70a/t?im (1st 4) <S0X undisaoived filter, overlapped or folcie^ Struct. = > O.Sum a > 3:1 Aspect Ratio <10X particulate coverage >50% coverage Ns Not Obaerved (EOS apectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforminc <SX holes or opaque areas F B C M > Sum to laboratory identification criteria observed. -Unuaed portion or niter For chrysotile: Q.73nm apaeini for (020) reneetiona. 0-53nm apaetnc far the layer line repeat, Btreakinf Chrysotile ■avoided poruon of (110) and (130) reneeUena. or niter For amphibole*: Q.SOnm layer line repeat, and approx. Portion of filter (2mm wide) 3.3 ratio of non-twinned layer Une spot spacing to aubject to examination Amphibole layer Una repeat distance (O.S3nm).

= SDS spectrum conforming to laboratory Identification criteria observed. 1 AMPHIBOLES Ambiguous i -------------------- 1 r= Single Fiber (1-3 intersections s 1-3 fibers) Amosite ! B= Bundis (>a fibers <1 fiber diameter apart) ______________ 25mm flltsr ! Crocidolite , Non—asbestosI C= Cluater >3 IntersecUona) ’ ___________ i Ms Matrix ;----------- - 3topp»n« Huies: ----------- - j Anthophyllite i NSD= No Structure* Detected >50 t/C.O. or in let 4 C.O. Tremolite .Actinolite Non-ldenLified L\DATA\PRIVaTE\MIKKC\CADDNPEM3 9/22/80

CITY_21MC100_002849263

NYC-WTC_000209905