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

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP t): 57B5 - 10/28/01 Lab Sample No. 62410 Filter Type MCE 25 mm Operator Client Spl. No. 1 Filter Area 3 85 mm2 Instrument I.D. EM 10 CRX Screen Magnification 16,40[3X Grid I.D. (GO) Area - ^4'^ 0.01124 mm*2 Disk No. Comments Acc. Voltage 80 kV No. GO to be Analyzed 4 ( 3 147 Struct. Corspd. to 70 s/mm*2 )

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

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Store alt unrepealed apectra-^ Photo No. (from I in 5 aa teatoa- Identify all atructurea uaing EDS Check: __________ diffraction_ for ____ asbealos containing aamplea) jCrid acceptance;! structures up lo 70s/^m (let 4) Struct. = > D.Sum & > 5:1 Aspect Ratio <50% undiSBolvea filter, overlapped or folded <10% particulate coverage >S0X coverage Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquarea Totals Positive diffraction pattern propertiev conforming <SX holes or opaque areas F B C M > Sum to laboratory Identification criteria observed. ■Unuoed portion For chrysotile: 0.73nm spacing for (020) reflections, of niter Chrysotile O.aOnm spacing for Uie layer line repeat, streaking -Avoided portion of (110) and (130) reflectlans. of fitter For amphiboles: O.OSnm layer line repeat, and approx. Portion of niter (2mm wide) 3.3 ratio of non-twinned layer Une spot spacing to •ubjeel to examinaUon Amphibole layer line repeat distance (Q.OOnm). ;/= EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 interaeeUoni = 1-3 fibers) Amosite D= Bundle (>3 fiber* <1 fiber diameter apart) 2Sn>m filler Crocidolite Non-asbestos C= Cluiter (>3 intenectloni) Matrix J Slopptni Rules: 1.___ Anthophyllite NSDs No Structures Detected >30 i/C.O. or In 1st 4 G.O. Tremolite Actinolite Non-Identified L-\DATA\PWVATB\MIKBC\CADD>5’BMa 9/22/»fl,

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