Asbestos TEM micrograph data sheet, Lab Group 5793, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5793 - 10/30/01

Lab Sample No. 62732 Filter Type MCE 25 mm Operacor Clienc Spl. No. 17 Filter Area 385 mm'^2 Instrumenc I.D. SW 10 CRX Grid I.D. Disk No. Screen Magnification 16,4QQX (GO) Area 0.01124 mm"2 Comments Acc. Voltage 00 kV No. GO to be Analyzed _£ ( 3.147 Scrucc. Corspd. co 7U s/mm"2-)

GO. structure StrucLure Type Length I.D. of Structure N or EDS >0.5 um (Nonasb. No Coord. No. F B C M 5um Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

3

Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance:! structures up to 70a/Am (Ist 4) <50X undissolved filter, overlapped or /olded Struct. = > 0.5um & > 5:1 Aspect Ratio <10X particulate coverage >5QX coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M > 5um to laboratory identification criteria observed. -Unused portion For chryvolile: Q.73nm spaclne for (020) reflections. of niter Chrysotile 0.53nm spacinf for the layer line repeat, streaking 'Avoided portion of (110) and (130) reflecUons. of filter Por amphiboles: 0.&3nm layer tine repeat, and approx. Portion of niter (2mm wide) 3.3 ratio of non-twlnned layer line spot spacing to subject to Amphibole layer line repeat distance (0.53nm). examination

v/s EDS spectrum conforming to laboratory idenUheaUon criteria observed. amphiboles Ambiguous Ps Single Fiber (1-3 Intersections = 1-3 fibers) Amosite fis Bundle (>3 fibers <1 fiber diameter apart) SSmm nitsr Crocidolite Non—asbestos C= Cluster (>3 inlersecUona) I--------- ) stopping Rules: I .... . Ms Matrix Anthophyllite NSD= No Structures Detected >30 s/C.O. or in 1st 4 C.Q. Tremolite Non—Identified U\OATA\PR1VATE\MJKEC\CADD'?‘ZM3 0/22/08 Actinolite

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