Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS L7iB GROUP #; 5639 - 10/08/01 Lab Sample No. 60569 FilCsr Type MCE 2S mm Operator Client Spl. Nt. WSHA-EB&R-10/8-04 Filter Area 385 mm '2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,400X (GO) Area 0.01124 mm"2 Comments ACC. Voltage - 80 kV No. GO co be Analyzed _4 ( 3.147 Struct. Corspd. to 70 s/min^2.l

GO. structure Structure Type Length I.D. of Structure EDS ^0.3 um (Nonasb. No Coord. No. F B C M Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

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Photo No. (from 1 in S asbestos- identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: I Btrucluree up to 7Q8/Am (l>t 4) Struct. = > O.bum & > 3:1 Aspect Ratio <SOX undiaoolved filter. overlnppcd or folded <10X particulate corerafe >50X coverage Totals Ns Not Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <SX holes or opaque areas________________________ F B C M > 5um to laboratory identification criteria observed. ■Unused parUon For chrysotile: O.TOnm ipacing for (020) rsnaetloni. of niter Chrysotile 0.&anm apeelng for ths layer line repeat, streaking ■Avoided portion of (110) and (130) reflections. er niter For amphiboles: O.^anm layer Une repeat, and approx. Portion of niter (Smin wide) a.a ratio of non-tvtnned layer line apot spacing to aubjocL to osaminaUoD Amphibole layer lino repeat dlstancs (O.&Onm). v/a EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous Fs Single Fiber (1-3 InteraecUoaa s 1-9 flben) Amosite B= Bundle (>3 flbera <1 fiber diameter apart) ZSmni niUr Crocidolite Non—asbestos

□ C= Cluster (>3 IntersecUons) J Sloppln< Rules; L Ks Metiix Anthophyllite NSD= No Strueturea Detected [ >30 a/C.a. or In lai 4 C.O. Tremolite Actinolite Non-Identified L:\ PATA\ PRJVATE\ MIKBC\ CADD^ MO B/Z2/9a

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