NYC-WTC_000182591

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAS GROUP #: 5758 - 10/24/01 Lab Sample No. 62147 Fiicsr Type MCE 25 mm Ooeracor Clienc Sol. No. 11 Filter Area 38£ mm"2 Instrument I.D. EM 10 CRX Grid I.D. Gisk No. Screen Magnification 16,4QQX (GO) Area 0.01124 mm"2 Comments. Acc. Voltage 80 kV No. GO to be Analysed _4 ( 3.147 Scrucc. Corspd. co 70 s/mm^2.)

GO. Structure Structure Type Length I.D. of Structure EDS (Nonasb.

ya No Coord. No. ^0.5 um F B; C M < 5 um Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) 7 f/ // //

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Photo No..(from 1 in 5 asbestos- Identify all structures using EDSS Check diffraction for asbestos Store all unrepeated spectra— containing samples) Grid acceptance: t structures up to 70a/:?im (lat 4) <50^ undiasolvea filter, overlapped or folded Struck = > 0.5um & > S:1 Aspect Ratio <10% particulate coverage >S0X coverage Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals <SX holes or opacue areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory identification criteria observed. ■UnuBed porUoa Por chrysotile: Q.7anm apaclnr for (020) reriacUena, of niter Chrysotile 0.53nm apacinc for the laynr line repeat, atreaicing ‘Avoided portion of (ilO) and (130) reflectiona. of filter Por amphlbolea: 0.53nm layer Une repeat, and approx. Portion of filter (2mm wide) 3.3 ratio of non-twlnned layer Une spot spacing to BUbject to examination Amphibole layer line repeat distance (O.SOnm). EDS spectrum conforming to laboratory Identification criteria observed. AMPHIBOLES Ambiguous P» Single Fiber (1-3 Intersectlona = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 25mm filler Crocidolite Non-asbestos Anthophyllite NSD= No ELructure. DoUcUd | >S0 »/C-g. °r In l.t « C.O. I Tremolite Actinolite Non-Idenlified UXDATAXPRIVATEXHlKSCXCADDVEMa 3/22/98

CITY_21MC100_003099781

NYC-WTC_000182591