Asbestos TEM micrograph data sheet, Lab Group 57B5, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5785 - 10/28/01 Lab Sample No. 62420 Fileer Type MCE 25 mm Operator Client Spl. No, 11 Filter Area 385 mm"2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16x10^ (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO to be Analyzed ( 3.147 Struct. Corspd. co 70 s/rnrn'^2.)

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

-3

Store all unrepeated spectra—^* Photo No. (from 1 in 5 asbestos- Identify all Btructurea using EDS Check diffraction for asbestos containing samples) Grid acceptance:! structures up to 70s/&im (let 4) <50X undissoivea filter? overlapped or folded Struct. '= > 0.5um & > &:l Aspect Ratio <tOX particulate coverage >S0X coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <SX holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory identification criteria observed. •Unuiod parUon For chrysotile: 0.73nm epscinK for (020) refloctloni. of niter Chrysotile O.SOnm epacinf for the layer line repeat, streaking -Avoided portion of (110) and (130) refleetiena. of niUr Por amphiboles: O.S3nm layer line repeat, and approx. Portion of niter (2mm wide) 3.9 ratio of non-Lw|nncd layer line spot spacing to subject to esamination Amphibole layer line repeat distance (0.93nm). v/s EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous Ps Single Fiber (1-3 intersections = 1-3 fibers) Amosite Bs Bundle (>3 fibers <1 fiber dlilameler apart) C= Cluster {>3 InteraecUons) 29mm niter Crocidolite Non-asbestos . I stopping Rules: I . Anthophyllite Us Matrix NSD= No Structures Detected >90 a/G.O. or in let 4 C.O. Tremolite Actinolite Non-Identified L:\DATA\PRIVATE\MlKEC\CADD\7EMa 0/22/08

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