Asbestos TEM micrograph data sheet, Oct 28 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP U: - 12/28/'Cl Lab Sample Nq. 62424 Filter Tj.’pe MCE 2 £ mm

Client Spl. No Filter Area 3aS? mm 2 Instrument I.D, EM 10 Grid I.D Disk Nc.

Screen Magnificat2.011 L6.400X (GO) Area 0.01124 mm"? Comments

Acc. Voltage 8 0 .kV No. GC Co be Analysed __4 14'7 Strucr. Corspd. Lo 70 s/fnm^2. ?

Length I.D. of Structure EDS n or jlC. Structure structure Type (Nonasb. No Coord. No. 5.0.5 um > Sura F B C M < 5 um Chrys. Amphibole Nonasb. Ambig./NDi Elements) 5=

2^ 3 •• -

Store all unrepeated spectra-^ Photo No. (from 1 in 5 asbestos— Identify all structuresusingEDS Check diffraction for aabcatoa containing sampler) Grid acceptance:}, structures up to TOs/t^n (Hl 4) <50% undisaolveo filter, overlapped or folded Struct = > O.Sum k > 5:1 Aspect Ratio <10X particulate coverage >50X covenrage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 2Q unfolded or overlapped gri*id squares <5% holes or opaoite areas E B C M Sum v/s Poiitive diffraction pattern properties conforming to laboratory IdentificaLion criteria observed. Unused portion For chrysotile: Q.73nn> apacing for (020) reflections, of niter Chrysotile O.SDnm epacing for the layer line repeat, streaking Avoided portion of (DO) and (130) reflecijons. of niter Por amphiboles: O.SDnm layer line repeat, and approx. (Smin wide) 3.S ratio of non-twinned layer line spot spacing to Amphibole layer line repeat distance (3.53nm), ED3 spectrum conforming to laboratory idenUfieation eriteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite Bs Bundle (>3 fibers <1 fiber diameter apart) eSmin rilUr Crocidolite Non—asbestos C= Cluster (>3 lnLer*«ction^) ______ 1 Stopping Rules: I---------- Anthophyllite Ms Matrix NSL= No Structure* Detected >50 a/C.O. or in lit 4 C.O. Tremolite Actinolite Non-Identified J U\1)ATA\ P RIVATFs CADD'^TMa 8/22/98

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