Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATG ASSOCIATES INC. TEM ANALYSIS LAB GROUP 574L - 10/23/01 Lab Sample No. 62000 FilCer Type MCE 25 mm Operator Client Spl. No. 41-9 Filter Area 36S mm~2 Instrument I.D. EM 10 CRX Grid I.D. --- Disk No. Screen Magnification 16,400X (GO) Area Q. 01124 inm'^2 Conitnents Acc. Voltage 80 kV No. GO to be Analyzed _4 ( 3.147 Struct. Corspd. to 70

GO. Structure Struetura 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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Store all unrepeated spectra—^ Photo No, (from 1 in S as testos- Identify all atructurea uaing EDS Check diffraction for asbestos containing samples) Grid acceptance:! structures up to TOaZ&m (l>t 4) <50X undiaaolved niter, overlapped or folded Struct = > O.Sum Ie > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. ■Unused portion For chrysotile: 0.73nm spacing for (020) reflections. O.S3nm spacing for the layer line repeat, streakinc of niter Chrysotile Avoided portion of (110) and (100) reflections. of filter Por amphiboles: O.SOnm layer line repeat, and approx. PorUon of filter (2mm wide) a.S ratio of non-twinned layer line spot spacing to subject to examination Amphibole layer line repeat distance (O.S3nm). EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES Ps Single Fiber (1-3 Intersections = 1-3 fibers) Amosite Ba Bundle (>3 fibers <l fiber diameter apart) _________________ZSmm filter Crocidolite Non-asbestos S: SSJte ' ______ Sloppin, Rule.: I-------- Anthophyllite NSD= No Slruoture. Delected | «/C.I). ar in lit ♦ G.O. Tremolite Actinolite Non-Identified k\DaTA\PRIVATB\mKBC\CADD7E«3 9/22/98

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