Asbestos TEM micrograph data sheet, Oct 26 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP ■ Lat Sample He p ,pe.Ht Client Spl Nt. Ar S mm

Inscruifienc. ■ SM 1 C CRX Grid I.D. Disk No.

Screen Maanif icac..on 1£, 400X (GO) Area 0.01174 mm"2 CommenLs Acc. Volcage 3 0 k/ No. GO 00 bs Analyzed ; 3.147 Struct. GorsDd. to 70 s/nim'^2. )

GO. Structure structure 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 Z

I I Photci No. (from 1 in 5 asbestos- i I store all unrepeated spectra—’^ Identify all atructures using EDS Check diffraction for asbestos containing samples; Grid acceptance:} structures up to 70a/»^m (let 4) <50% undissolved filter, overlapped or foWed”” Struct = > 0.5um Je > 5:1 Aspect Ratio <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals P)aitive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. 'Unused portion of riltep Fur chrysotile: 0.73nm spacing for (020) reflections. 0.33nm spacing for the layer line repeat, streaking Chrysotile ’Avoided portion of (no) and (130) reflections, of fllLcr Fer ampbibales: O.&Onm layer line repeat, and approx. Portion of filter 12mm wide) Xi ratio of non-tvinned layer line spot spacing to Ct to nation Amphibole layer line repeat dlstanes (O.SOnm).

El'S spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= Single Fiber (1-3 intersections = 1-3 fibers) Amosite B= Bvndie (>3 fibers <l fiber diameter apart) C= Cl Jster (>3 intersections) 25 mm flltsr ____J Stopping Rules: I-------- Crocidolite Non-asbestos Ms Matrix Anthophyllite NSD= No Structures Detected >30 a/C.O. er in isL 4 C.O. Tremolite Actinolite Non-ldentified L:\DATA\PRrVATF\MIKSC\CAD0'fEl<3 9/22/98

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