Asbestos TEM micrograph data sheet, Oct 26 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP #: 10.'2€/01

Lab Sample No. 62.177 Filter Tvp& MCE mm Operator Al C Client Spl. No. IS Filter Area 335 InsCrum-nc :.D. EM 10 GxX Grid I.D. Disk No.

Screen Magnificaoion .15,4Q0X (GO) Area 0 01124 mn Comments Acc. Volcace 8 0 kv No. GO ^o be Analyzed 147 Struct. Corsod. tc 70 ■

jsa ! Structure Structure Type Length I.D. of Structure EDS (Nonasb. No Coord. No. F B C M 3O.5 urn 3. Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 iim

A

(U___ J______ i Photo No. (from 1 in 5 asbestos- I . I j______ Identify all structures using EDS Chee c diffraction for asbestoa I Store all unrepeated spectra containing samples) Grid acceptance:! structures up to 70s/Am (Ut 4) <50% undissolvea filter, overlapped or folded Struct. = > D.5um & > 5:1 Aspect Ratio <10X particulate coverage >50% coverage N= NjL Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals <5% holes or opaque areas Positive diffraction pattern properties conforming F B C M » Sum to laboratory identification criteria observed. ■Unused portion For chrysotile: 0.73nm ipaclng for (Q2D) reflecUoni, of niter Chrysotile ? O.jiOnm spacing for the layer line repeat, streaking -Avoided portion of (110) and (130) reriections. of niter For amphiboles: O.Mnm layer line repeat, and approx. Portion of niter {Zmm wide) 3..'i ratio of nen-tvinned layer line spot spacing to subject to exeminaUon Amphibole layer Une repeal distance (Q.53nm). v/= EDS spectrum conforming to laboratory Idtintlfication criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections - 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Chiater intanectione) , 2Smm niter I Stopping Rules: I---------- - Crocidolite Non-asbestos U= HiLrix Anthophyllite >30 s/C.D. or in 1st 4 C.O. Tremolite NSD= No Strueturee Oetsetod Non-Identified Actinolite L:\D*T»\P«I¥*TE\1IIKEC\C*DDVE“3 9/22/9fl

CONFIDENTIAL, CITY_21MC100_003473410 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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