TEM asbestos analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5741 - 10/23/01 Lab Sample No. 62Q18 Filter Type MCE 25 mm Operator Client Spl. No. 59-5 Filter Area 385 mm"2 Instrument I.D. EM 10 CRX Grid I.D. -^^7, Disk No. Screen Magnification 16,400X (GO) Area 0.01124 iTOr2 Comments Acc. Volcage 80 kV No. GO to be Analyzed 4 ( 3.147 Struct. Corspd. to 70 3/nim"2.)

Length I.D. of Structure EDS n or GO. structure structure Type (Nonasb. No Coord. No. >0.5 um F B C M < 5 um > Sunt Chrys Amphibole Nonasb. Ambig./ND Elements) Ip I ; 21 52 'Hr T

Store all unrepeated spectra—^ Photo No. (from 1 in 5 asbestos- identify all atructurea uaing EDS Check diffraction for aabeatoa containing Bamplea) Grid acceptance: I structures up to TOa/An (let 4) <S0X undiaaolved filter, overlapped or folded Struct =: > O.Sum ft > 9:1 Aspect Ratio <10X particulate coverage >S0X coverage Totals Ns 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. (nuaed portion For chrysotile: 0.73nm saseing for (020) rafleetians. 0.53nm apacing for the layer line repeat streaking of niter Chrysotile -Avoided portion of (110) and (130) reflecUons. of filter For amphiboles: O.S3nm layer line repeat and approx. Portion of filter (Zmm wide) 3.S ratio of non-twlnned layer line spot apacing to ■ubjeet Lo exeminetion Amphibole layer line repeat distance (Q.&3nm). EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous Fs Single Fiber (1-3 intersections s 1-3 fibers) Amosite 8= Bundle (>3 fibers <1 fiber diameter apart) 2Smm fitter Crocidolite Non-asbestos S: I-------1 Slopping Rut..: I-------- Anthophyllite NSD= No Structure. Detected | '/C-O- °r In l.t 4 g.O. | Tremolite Actinolite Non-ldentified L\DATA\PB1V*TE\«IKEC\CAOD\IEM3 9/82/98

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