TEM air analysis results, Oct 10 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS lAB GROUP ii; 5662 - 10/10/01 Lab Sample No. 60807 Filter Type MCE 25.mm Operator Af r Client Spl. No. NSHS-EIR-IQ/IU-08 .-ilcer Area 3B5 mtn'2 , Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,400X IGO) Area 0.01124 mm"2 Comments

Acc- Volcage 8 0 kv No. GO CO be Analysed __4 ( struct. Corspd. co 10 s/nim"2.)

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

3 A

Store all unrepeated spectra-^ Photo No. (from 1 In 5 aabeatos- Identify all atructurcH uaing EDS Chee c diffraction for asbeatoe eontaining samples) Grid acceptance:! structures up to 70a/i (1>1 4). <5QX undissolved filter, overlapped or folded Struct. — > 0.5am At > 9:1 Aspect Ratio <10X particulate coverage >50X coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <SX holes or ooaoue areas F B C M > Sum to laboratory idenUflsatlon criteria observed. Ul porUon Por chryaoLila: 0.73nm apsolng for (020) rsnacUona, of niter Chrysotile 0.99nm apactng for the layer line repeat. aLreaking -Avoideil porUon of (110) and (130) reOecUoas, of niter Por amphiboles: O.Unm layer line repeat, sod approx. Portion of niter (2mm wide) XS ratio of non-twlnned layer line spot apactng to aubjeet U axaaninaUon Amphibole layer line repeat diataoce (Q.S3nio). \/= EDS apectrum conforming to laboratory Ambiguous identlficaUon criteria observed. AMPHIBOLES P= Single Fiber (l-3 Intersections » 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 85nim filter Crocidolite Non-asbestos C= Cluster (>3 intenecUona) Stopping Ruiea; I,.. , Anthophyllite M= Matrls NSD= No Structuree Detected >a0 t/C.O. or In lat 4 C.O. Tremolite Actinolite Non-Identified L\DATA\ PRIVATE\ HlKBC\CADD^Ma 8/22/88

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