NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LA3 GROUP d- 57Gr

Lao Sample No 22530 “er P/pe MCE 25 mm Operaco: lent Spi. Nc. ser Area 2 3 5 T.m' 2 Instrument i: rd Disk No. Screen Magnet ion 15.400X (GO.: Area - 2 4 mm Comments Acz Volcage SC kv Nc . to be .Anal'zo Corstd 'mm'

Length I.D. of Structure EDS GO. structure Structure Type N or ■ (Nonasb. >0.5 um I No Coord. No. Fl B m cI < 5 um ! > 5um Chrys.i Amphibole Nonasb. Ambig./ND Elements) / Z.

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... ill' I Uji_____________ Photo No. (from 1 in 5 asbi tos- Identify ail structures using SDS Check diffraction for aabeatoB Store all unrepealed spectra containing samples) Grid accepLance:! structures up to TOa/Am (in 4) <S0X undisaolvea filler, overlapped or folded Struct. = > O.Sum k > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Totals Ms Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum lo laboratory Identification criteria observed. Unused portion For ehrysoUle: 0.73nni spacing for (020) renscUons, ar filter Chrysotile 9.33nm spacing for the layer line repeat, atreabing -Avoided porUon of (110) and (130) refleeUons. of niter Per amphiboles: O.S3nm layer Une repeat, and approx. // I PorUon 9t niter (2min wide) 3.3 ratio of non-twinned layer Une spot apacing to I subject lo Amphibole layer line repeat distance (Q.S3nm). 11 ( examination = EDS ip«qtrum conforminc to laboratory Ambiguous identiflcadan criteria obaerved. i AMPHIBOLES Single Fiber (1~3 Inu 1-3 Ilben) Amosite as Bundle (>3 fibers <1 fiber diameter apart) ____________ ZSmni fUlar Crocidolite i Non-asbestosI inlwwctlo..) ______ ^3o.pp.„, Rule.: --------- , Anthophyllite j i MSD= Ho SUuclure. Detected »« ' Actmoilt: Non-ldentified i L\DATA\PSIVATE\MIKZC\CADD'TEM3 9/22/08

CITY_21MC100_002849266

NYC-WTC_000209908