TEM asbestos analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #; 5741 - 10/23/01 Lab Sample No. 62041 Filter Type MCE 2S mm Operator Client Spl. No. 82-2 Filter Are. Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,4Q0X (GO) Area 0.01124 Comments. Acc. Voltage 80 kv No. GO to be Analyzed _4 ( 3.147 Struct. Corspd. to 70 s/mm*2.)

GO. Structure structure Type Length I.D. of Structure EDS N or ^0.5 um (Nonasb. No, Coord. No. F B C M Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um Yv-'V Pa: jZ 5.3:2'

store all unrepealed spectra-Z Photo Nd. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos containing samples) Grid acceDt>nee:l atructurea up toI 70e/An (let 4) <50X undiaaolved filter, overlapped or r<rolded Struct = > O.Sum 4 > 5:1 Aspect Ratio <10X particulate coverage >S0X coveragi* equaree Totals Na Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid Positive diffraction pattern properties conforming <5X holea or opaque areaa_______________ F B C M > Sum rn to laboratory identification criteria observed. Inuted portion Por chrysotile: 0.7anm spacing for (020) roflecUens, 0.53nm spacing for the layer line repeat streaking of fitter Chrysotile ■Avoided portion of (UO) and (130) reflecUona. of fitter Por amphiboles: O.a3nm layer line repeat and approx. Portion of fitter (Zmm wide) 3.S ratio of non-twinned layer Une spot apaeing to subject to exBRiinatioQ Amphibole layer line repeat diatance (O.SSnm). v/= EOS apeetrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous pa Sincle Fiber (1-3 Intersections = 1-3 fibers) Amosite Ba Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) ZSiTim niter Crocidolite Non-asbestos ------- 1 stopping Rules: I--------- - «= Metrii Anthophyllite NS3= No Structures Detected >50 s/G.O. or in lit 4 G.O. Tremolite Actinolite Non-Identified L:\DATA\PHIVATr\MIKBC\ CADD\PEI<3 8/22/98

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