Asbestos TEM analysis results, Oct 19 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LA3 GROUP #; 5730 - 10/19/01 Lab Sample No. 61698 Filter Type MCE 25 mm Operator Client Sol. No. 08 Filter Area 385 mm"2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magni £icac.ion 16,4 0 OX (GO J Area 0.01124 Comments. Acc. Voltage 80 kV No. GO to be Analyzed _4 ( 3.147 Scruci. Corspd. co 70 s/mni"2J

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 5 as lestos— Identify all etructurea using EDS Check diffractioQ for eabeataa Store all unrepeaLed spectra — containing samples) Grid acceptance;! structures up to 70s/Am (let 4) Struct. - > O.Sum de > 5:1 Aspect Ratio <50X undiBaolveoTtTCr^^verlapped o ■loTSea^^^ <tOX particulate coverage >50X coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares ^/s Positive diffraction pattern properties coDformlng <5X holes or opaque areas F B C M Sum to laboratory identification criteria observed. -Unu*«d portion For chrTBoUle: 0.73nm spacing for (020) rsflocUons, or niter Chrysotile 0.53nm spacing For the layer line repeat, streaking -Avoided portion of (110) and (130) rafleeUona. of niter For amphiboles; O.Mnm layer Une repeat, and approx. PorUon or niter (Bmm wide) 3.0 ratio of non-tvioned layer Une spot spaeing to ■ubjecl Ld examination Amphibole layer Une repeat distance (O.&nnm). EDS apeelruTn conforming to laboratory IdenUficaUon criteria observed. AMPHIBOLES Ambiguous Ps Single Fiber (1-3 intersections s 1-3 fibers) Amosite Bs Bundle (>3 fibers <1 fiber diameter apart) ZSmm niUr Crocidolite Non—asbestos

□ C= Cluster (>□ intersections) ___[ stopping Rules; L Ms Matrix r Anthophyllite NSD= No Structures Detected >M i/C.D. or In lit 4 C.O. Tremolite Actinolite Non-ldentified L:\QATA\PRrVATE\MIKBC\CADDVBM3 8/22/B8

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