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. 62414 Filter Type MCE 25 mm Operator Client; Spl. No. 5 Filter Area 365 mm"2 Instrument I.D. EM IC CRX Grid I.D. ___ Disk No.

Screen Maanification 16,4OOX (GO) Area 0.01124 mm"2 Comments. 'Acc. Voltage 80 kV No. GO to be Analyzed ( 3.147 Scrucc. CorspQ. co 70 s/mm"2.)

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

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Photo No. (from 1 in 5 asbeatoa- Identify all atructurea using EDS Check diffraction for aabeatoa Store all unrcpealcd spectra— containing samples) Grid acceptance:! structures up to VOs/i^m {18t 4) <50X undiSBOlved filter? overlapped or folded StrucU = > O.Sum & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. 'Unused portion Por chrysotile: 0.73nm spscinc for (080) renecUons. of niter Chrysotile O.SSnm spacing for the layer Une repeat, stresking •Avoided portion of (110) and (130) refleetlona. of niter For amphiboles: 0.53nm layer Une repeat and approx. PorUon of niter (Zmm wide) 3.S ratio of non-twlnned layer Une spot spaeing to lubject to examination Amphibole layer Uns repeat distance (O.SSnm). EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite 8= Bundle (>0 fibera <1 fiber diameter apart) C= Cluster (>3 inleraecUoni) 25mm filler Crocidolite Non-asbestos J Slopping Rules: I______ _ Anthophyllite M= Matrix NSD= No Struct urea Detected [ >50 s/C.C. or In lit 4 C.Q. Tremolite Actinolite Non-ldentified L:\DATA\PB1VATE\M1XEC\CADDVEM3 9/22/OB

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