Asbestos fiber TEM analysis data sheet, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS Lc.d Sdinpie Nc-. /194 2 LAB GROUP fl :

.■"Cc MCE mm •jperar.G AY Cii-ni. Spi. Nc, Ares 355 mm"2 Instrument I.B. EM 1C CRX Grid I.D. Disk No

Scr sen Magnificat ion 400X (GO) Area 0.QilQfl Commencs Aco. Vclcage 5 0 kV No. GO co be Analysed _4 3.147 S-ruc^ . Ccrspd. co 7 0 . )

GO. structure Structure Type Length I.D. of Structure EDS ! (Nonasb. ! No, Coord. No, F B C M ^0.5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)! < 5 um f 6 P // J ^1

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i i i - i I Photo Nd. (from 1 in 5 asbcatoa- Identify all atructures using EDS Check diffraction for aabesloa store all unrepeated spectra containing samples) Grid acceptance:!. struclurea up to 70x/Am (Ut 4) <50% undiaaolvea filler, overlapped or folded Struct. = > O.Sum & > 5:1 Aspect Ratio <I0X particulate coverage >50X coverage Totals N= /lot Observed (EDS spectrum or diffraction pattern) at leaat 20 unfolded or overlapped grid squares <5X holes or opaque areas Positive diffraction pattern properties conforming F B C M 5um to laboratory identification criteria observed. -Unueed porUun For chrysotile: 0.73nm ■pacing for (020) reflecUoni, of niter Chrysotile ( (.53nm spacing for the layer line repeat, atreaking -Avoided portion (1 (IIO) and (too) refiecUone. of filter f or amphiboles: 0.53nm layer line repeat, and approx. (2mm wide] 5.S ratio of non-tvinned layer line spot spacing to U \ aubjecL to examinaUon i Amphibole layer Une repeat dl»tanc« (0.53nm).

■/= EDS ipectrum conforming to laboratory I'lcntificstion criteria observed. AMPHIBOLES Ambiguous j F= Single Fiber (1-3 Interiectloni = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 Intersections/ 25mm filter -—J Stopping Rules: L___. Crocidolite Non-asbestos M.. Matrix Anthophyllite NSDs No Structure* Detected >50 a/G.O. or in lat 4 G.O. Tremolite Non-Identified i Actinolite L:\ D? .TA\ P RI YATE\ MI KE C\ CA D «3 9/22/BB

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