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. 62027 Filter Type MCE 25 mm Operator Client Spl. No. 68-4 Filter Area 385 mm*2 Instrument I.D. EM 10 CRX Grid I.D. 7 '■ Disk No. Screen Magnification 16,4Q0X (GO) Area 0.01124 mm ^2 Comments ■ 'Acc. Voltage 80 kV No. GO to be Analyzed _4 ( 3.147 Struct. Corapd. to 70 3/mm^2.)

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

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Store all unrepeated apectra-^ Photo No. (from 1 in 5 as jcstos- Identify all structures using EDS Chee c diffraction for aabealoa containing samples) Grid acceptance:! atructurea up to 70s/i?im (lat 4) <S0X undiasolvea fiiterr overlapped or folded Struct. = > O.Sum ft > 5:1 Aapect Ratio <10X particulate coverage >50X coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at leant 20 unfolded or overlapped grid squares y/s Positive diffraction pattern properties conforming <SX holea or opaque areas F B C M > Sum to laboratory identification criteria observed. Jnuaed portion Por chrysotile: 0.73nm spacing for (080) rsflections. of filler Chrysotile 0.93am spacing for ths layer tine repeat, streaking 'Avoided portion of (110) and (130) reflections. of filter Por amphiboles: 0.93nm layer line repeat, and approx. Portion of filter (Zmm wide) 3.9 ratio of non-twinned layer line spot spacing to subject to examination Amphibole layer line repeat distance (0.93nm). v/= EDS apectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P=s Single Fiber (1-3 Inlersectlona = 1-3 fibers) Amosite Bundle (>3 fibers <l fiber diameter apart) 2Smm filler Crocidolite Non-asbestos m" --------- Istoppini Rule.: I------- Anthophyllite NSD= Mo structure. Detected | >M °r ‘d 4 C-0- Tremolite Actinolite Non-Identified U\DATA\P1UVATE\M1KSC\CADOVEU3 9/22/90

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