TEM asbestos analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP S741 - 10/23/01 Lab Sample No. 62033 Filter Type MCE 25 mm Operator Client Spl. No, 74-3 Filter Area 385 mm^2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,4O0X (GO) Area 0.01124 mni"2 Comments Acc. VoltaQe SO kV No. GO Co be Analyzed _4 ( 3.147 Struct. Corspd. to 70 g/fntn*'2.)

Length I.D. of Structure EDS n or^/ GO. structure Structure Type (Nonasb. No. Coord. No. >0.3 urn > Sum F B C M < 5 un> Chrys Amphibole Nonasb. Ambig./ND Elements)

7P 75^/ >1 ES 0

store all unrepeated spectra—^ Photo No. (from 1 in 5 asbeatoa- Identify all strueturea uaing EDS Chee [ diffraction for asbeatoe containing samples) Grid acceptance:! jtrucLures up to 70g/^n (let 4) <S0X undisaolveo filter, overlapped or foldea Struct = > O.Sum k > 5:1 Aspect Ratio <tOX particulate coverage >SOX coverage Totals N5s Not Observed (EOS spectrum 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 identification criteria observed. 'Unuaed portion For chrysotile: 0.73nm spacing for (020) reflections, of niur Chrysotile a.53nm spacing for the layer tine repeat, streakinc -Avoided portion of (110) and U30) refteettens. of niter For amphiboles: 0.53nm layer line repeat, and approx. Portion of filler (2mm wide) 3.3 ratio of non-tvinned layer line spot spacing to subject to Amphibole layer line repeat distance (O.S3nm). examination \/= EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F- Singie Fiber (l*-3 interaections =1-3 fibers) Amosite 8=5 Bundle (>3 fibers <1 fiber diameter apart) ZSmrn HlUr Crocidolite Non—asbestos C= Clualer (>3 intersections) ------'*i Slopping Rules: i--------- Anthophyllite 11= Matrix NSD= No Structure! Detected >90 s/C.O. or in let 4 C.O. Tremolite Actinolite Non-ldentified L;\DATA\PRlVATS\KlXBG\CADDXrEM3 8/2z/sa

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