Asbestos TEM analysis results, Oct 19 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP ft. 5730 - 10/19/01 Lab Sample No. 61705 Filter Type MCE 2£ nun Operator Client Spl. No. 18 Filter Area 38S mm"2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 15,400X (GO) Area 0.01124 mm"2 Commencs Acc. Volcage 8 0 kV No. GO to be Analyzed _4 I 3.147 Scruct. Corspd. Lo 70 s/rnm'^2.}

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

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Photo No. (from 1 in S aabcaLoa- Identify all atructures uaing BPS Chee c diffracUon for aabeatoa Store all unrepeaLed apecLra eontaintng aamplea) Grid acceptance:! atructurca up to TOa/^m (l«t 4) <50% undiaaolvea ruterl overlapped or folded. Struct. = > 0.5um A > 5:1 Aapect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at leant 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X hqlea or opaque areas F B C M >■ Sum to laboratory identification criteria observed. -Unuaed portion For chrysotile: 0.73nm spaelng for (020) reflections, of niter Chrysotile 0.aanm spacing for the layer line repeat, streaking '□ided portion of (110) and (130) reflecUona. of niur For amphiboles: O.S3om layer line repeat, and approx. Portion of filter (2mm wide) a.S ratio of non-t«inned layer line spot spacing to ■ubjocL to . asafnlnaUon Amphibole layer Une repeat distance (O.S3nm).

EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= Single Fiber (1-3 interaectiona s 1-3 fibers) Amoaite Bs Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) gSmm filter Crocidolite Non—asbestos Stopping Huies: I . M= Matrix . r Anthophyllite NS0= No Structures Detected I >90 l/C.O. or in l>t 4 C.O. Tremolite Actinolite Non-ldentified k\DATA\PRlVATE\MIKEC\CAD0VEN3 0/22/08

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