Asbestos TEM micrograph data sheet, Lab Group 57B5, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 57BS - 10/28/01 Lab Sample No. 62415 Filter Type MCE 25 mm Operator Client Spl. No. 6 Filter Area 385 inni~2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,400X {GO) Area 0.01124 mm~2 ■ Comments Acc. Voltage BO kV ,No. GO co be Analyzed _4 ( 3.147 Struct. Corsod. to 70 s/mm^2.)

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

Store all -unrepeated spectra—^ Photo No. (from I in 5 asbestos­ Identify all atructureg using EDS Check diffraction for aabesLoa containing samples) Grid acceptance:! structures up to 70a/^m (lal 4) struct. = > 0.5um tt > 5:1 Aspect Ratio <50% undiBSolveG filter, overlapped or folded <10X particulate coverage >S0X coverage Na Not Observed (EDS spectrum or diffracUon pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <SX holes or opaque areas F B C M >> Sum to laboratory idenUficaUon criteria observed. ■Unused portion Por ohrysoUls: 0.79am scaeing for (020) refleeUons, or filter Chrysotile 0.53nm spacing for the layer line repeat, stresidng of (110) and (130) reneeUons. V •Asoided of niter portion For amphiboles: 0.53nm layer tine repeat, and approx. Portion of filter (2mm wide) 3.9 ratio of non-tvinned layer line spot spacing to subject to examination Amphibole layer line repoat distance {0.S3nm). EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. AMPHIBOLES Ps Single Fiber (1-3 interaectiona = 1-3 fibers) Amosite B= Bundle f>3 fibers <1 fiber diameter apart) C= Cluster (>3 Intersections) 25mm niter Crocidolite Non-asbestos t'* Stopping Rules: I-.--., Anthophyllite Matrix NSDs No Structures Detected L:\DaTA\PRJVATE\MIICBC\ CADD'7TM3 0/22/aa [ >90 i/G.O. or In tst 4 C.O. Tremolite Actinolite Non-Identified

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