TEM asbestos analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #; 5741 - 10/23/01 Lab Sample Mo. 62026 Filter Type MCE 25 mm Operator Client Spl. No. 67-4 Filter Area 385 mm^2 - A Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,400X (GO) Area 0.01124 mm^2 Comments Acc. Voltage 80 kV No. GO to be Analyzed _4 I 3.147 Struct. Corspd. to 70

Structure ««»»«». Type Length I.D. of Structure EDS GO. (Nonasb. No. Coord. No. ^0.5 um F B C M < 5 um > Sum Chrys Amphibole Nonasb. Ambig./ND Elements) ) ¥ r 'f 2 4 z

Photo No. (from 1 in S asbestos­ __J_____ ______ store all unrepeated spectra Identify ail structures using EDS Check diffraction for asbestos containing samples) Crid acceptance:! atrUcturea up to 70a/&n (lat 4) <50% undiSBolved filterT^verlapped or folded Struct s > O.Sum & > 5:1 Aspect Ratio <IOX particulate coverage >S0X coverage Totals N= Not Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M > Sum to laboratory identification criteria observed. Jnuaed portion Por chrysotile: O.?3nm spacing for (020) reflections, 0.93nm spacing for the layer line repeat* streaking of filter Chrysotile af (110) and (130) renectlons. 'Avoided portion of filter Por amphiboles: O.S3nm layer line repeat, and approx. Portion of filter (2mm wide) 3.5 ratio of non-twinned layer line spot spacing to lubject to examination Amphibole layer line repeat distance (O.SSnm). \/= EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 2Smm filler Crocidolite Non-asbestos S= taSrt?'*® I______ Istoppln, Bui..: L_ Anthophyllite NSD= No Structursi DetocUd | ur 4 C.O. Tremolite Actinolite Non-Identified L:\DATA\PIUVATE\MIKSG\CADDVEM3 9/22/08

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