Asbestos TEM analysis results, Sept 28, 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #; 5574 - 09/28/01 Lab Sample No. 59635 Filter Type MGE 25 mm Operator Client Spl. No. T06 Filter Area 355 mm'^2 Instrument I.D. SM 10 CRX Grid I.D. Disk No. r— Screen Magnification 16,40OX (GO) Area 0.01124 rnm^2 Comments Acc. Voltage 8C kV No. GO to be Analysed • 6 ( 4.721 Struct, Corspd. to 70

Length LD. of Structure EDS GO. structure Structure Type N or (Nonasb. No. Coord, No. >0.5 um F B C M < 5 um Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) U /

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Store all unrepeated spectra—-^ Photo No. (from 1 in 5 aabeatos- Identify all atructurea using EDS Check diffraction for aabeatoa containing samples) Grid acceptance:! atructurea up to 70a/Am (l»t 4) <S0X undiaaolvea filter, overlapped or folded Struct. = > 0.5um it > 5:1 Aspect Ratio <10X particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squarea <5% holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory identification criteria observed. 'Unused portion of filter Chrysotile n For chrysotile: O.ianm spacing for (020) reflscUons, O.S3nm spacing for the layer Jine repeat, streaking of (110) end (130) r«necUona. For amphiboles: 0.53nm layer line repeat, and approx. Portion of niter -Avoided portion of filter (2mm wide) 3.5 ratio of non-twinned layer line spot spacing to subject to Amphibole layer Une repeat distance (0.5Snm). examination

EDS spectrum conforming to laboratory Ambiguous n identification criteria observed. AMPHIBOLES Amosite F= Single Fiber (1-3 intersections = 1-3 fibers) B= Bundle (>3 fibers <1 fiber diameter apart) __________ 25 mm filler ______ Crocidolite Non-asbestos S“ SSte --------- ! stoppin. Rule.: I------- Anthophyllite NSD= No Structure, Detected j >°° Tremolite Non-Identified n UX DATA\PRIVATE\ l<IKEG\CADD\rEU3 3/22/98 Actinolite

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