TEM analysis data sheet, sample 59742, September 2001

NYC 9/11 Public Portal Document

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ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5579 - 09/29/01 Lab Sample No. 59742 Filter Type MCE 25 mm Operator Client Spl. No. T19 Filter Area 3 85 mrr"2 Instrument I.D. EM IJ CRX Grid I.D.. Disk No. Screen Magnificacion 15,400X (GO) Area 0.01124 rnm^2 Comments Acc. Voltage 3 0 kV Nc. GO to be Analyzed £ ( 4,721 Struct. Corspd. to 70 s/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. Ambig./ND Elements)

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Photo No. (from 1 in 5 aabestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance:! structures up to 70a/Am (l»t 4) <50% undisaolvea niLerr overlapped or'folded Struct, = > 0,5um i > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforminf <5% boles or opaaue areas F B C M > Sum to laboratory identification criteria observed. -Unused portion For chrysotile: Q.73nm spacing for (020) reflections, of filter Chrysotile O.bOnni spacing for the layer Jine repeat, streaking 'Avoided portion of (110) and (130) reflections. of fiiUr For amphiboles: 0,53nm layer Une repeat, and approx. Portion of filter (2mm wide) 3.S ratio of non-twlnned layer line spot spacing to subject to axamlnation Amphibole layer line repeat distance (O.S3nm).

\/= EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F- Single Fiber (1-3 intersections - 1-3 fibers) Amosite B= Bundle (>3 fibers <l fiber diameter apart) 25mm rUUr Crocidolite Non-asbestos «= SSi? _____ Istopptn, SU1..= I------ Anthophyllite !(3D= No Structure. Detected | >50 ■/-<) or ‘t >< 4 C.O. Tremolite Actinolite Non—Identified L:\DATA\PRIVATB\MIKEC\CADDVEM3 0/22/88

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