TEM air analysis results, Oct 24 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP #: 5758 - 10/24/01 Lab Sample No. 62143 Filter Type MCE 25 mm Operacor. Client Spl. No. 7 Filter Area 385 mm"2 , Inscrument I.D. EM 10 CRX Grid I.D. Disk No.

Screen Magnification 16,400X (GO) Area 0.01124 nini^2 Comments Acc. Voltage 8 0 kV No. GO CO be Analyzed { 3.147 Sbrucc. Corspd. co 70 s/mm"2..)

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

Photo No. (from 1 in 5 asbestos- Identify all alructurea using EDS> Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: I structures up to TQs/i^m {Ist 4) <S0X undisaolvea filler, overlapped or foid^ struct. = > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >5076 coverage Totals N= Not Observed (EDS apectruin 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 IdenUfication criUria observed. •Unused portion For chryaotila: 0.73nrn apacing for (020) raflecUoni, 0.53nm apacing for tb« layer line repeat, atreaktng of filler Chrysotile ‘Avoided portion of (liO) and (130) reflections. of filter For amphiboles: O.SSnm layer line repeat, and approx. PorUon of filter (Zmm wide) 3.5 ratio of non-tvlnned layer line spot spacing la lubject to fiXBTnination Amphibole layer line repeat distance (O.SSnm). vX'b EDS spectrum conforming to laboratory identificstian criteria observed. AMPHIBOLES Ambiguous P= Single Fiber (1-3 intersections s 1-3 fibers) Amosite Bundle (>3 fibers <1 fiber diameter apart) Cs Cluster (>3 intersections) 25mm flllar Crocidolite Non—asbestos — I , I Slopping Rules: L—_ M= Matrix Anthophyllite NSDs No Structures Detected [ >50 t/G.O. or in Isl 4 C.O. Tremolite Actinolite Non-Identified L:\DATA\PBfVATC\MIXEC\CA0O\TEX3 9/22/96

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