Asbestos TEM micrograph data sheet, Oct 27 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5784 Lab Sample No. 62405 Filter Type MCF 25 mrr. Ooeracor Clieni Sol. No. 20 Filter .Zkrea 355 Instrument I.D EM 10 GRX Grid I -D. Disk No.

Screen MagnificaC;.cri 16 4C0X (GO) Area 0.01124 mW Comments Acc. Volcage 80 kV No. GO co be Analyzed 3.147 Struct. Corsod. to 7C s./inrT<2.;

Length I.D. of Structure EDS J30. Structure Structure Type (Nonasb. No, ('oord. No. >0.5 um F B C M < 5 um Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)

7P f fig ZS7 ££. (f 3'2, // PF // 7^

Photo No. (from 1 in 5 asbcoLoa- I Identify all atructurea using EDS Check diffraction for aabestoe Store all unrepeated spectra—^

containing «ampleaj Grid acceptance:! etructures up to (1-t 4) <50% undiaaolvea filter, overlapped or folded Struct. = > 0.5um & > 5 1 Aspect Ratio <10% particulate coverage >50% coverage Totals Ns Mol Observed (SDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holea or opaque areaa F B C M > Sum tn laboratory identification criteria observed. -UnuBMl portion For chrysotile: 0.73nm spacini for (020) reflectiona. of niter Chrysotile 0.23nm ipacing for the layer line repeat, streaking -Avoided portion o' (110) and (130} reneeUons. or niter For amphiboles: 0.S3nm layer line repeat, and approx. Portion of filter (2mm wide) 3 5 raUo of nan-t«fnoed layer line spot spacing to subject to Amphibole layer line repeat distance 0.33nm). examination

v/s CDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F> Single Fiber (1-3 intersections = 1-3 fibers) Amosite 0= Bundle (>3 fibers <1 fiber diameter apart) C= C uster (>3 Intersections) 2Smin filter Crocidolite Non—asbestos ■ ■ H.i . i Slopping Rules; L i.i... Anthophyllite Ms Matrix >50 i/C.O. or in 1st 4 G.O. I NSDs No Structures Detected Tremolite Actinolite Non-ldentified L\DATA\PRIVATE\MIICEC\CADD\TBM3 9/22/OB

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