Asbestos TEM analysis results, Oct 20 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5735 - 10/20/01 Lab Sample No. 61724 Filter Type MCE 25 mm Operacor Client Spi. No. 10 Fiicer Area 385 inm*2 Inscrumenc I.D. EM Io CRX Grid I.D. Disk No. Screen Magnificacion 16,400X (GO) Area 0.01124 mm'2 Commencs Acc. volcage 80 KV No. GO co be Analyzed ( 3.147 ScrucL. Corspd. co 70 s/murz.)

GO. structure Structure type Length I.D. of Structure EDS N or ^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 5 aabestns- Identify all atructurea aging EDS> Check diffraction for asbestos I • store all unrepeaUd spectra containing aamplea) Grid acceptance:! atructurea up to yOs/^m (lat 4) <SQX undisBolvea filter, overlapped or folded StrucL = > O.&um it > 5:1 Aspect Ratio <IOX particulate coverage >50X coverage Totals N= Not Obaerved (EDS spectrum or diffraction pattern) al least 20 unfolded or overlapped grid squares <SX holea er opaque areas F B C M > Sum Positive diffraction pattern properties conforming to Laboratory identification criteria obaerved. •UnuBod portion Por chrysotile: 0.73nm spaeing for (020) r«n«eUona, er niur Chrysotile O.S3nm spacing for the layer line repeat, streaking -Avoided portion of (110) and (130) reflections. of niter Por amphiboles: 0.a3nm layer line repeat, and approx. PorUon of filler (Smm wide) 3.9 ratio of non-t«inned layer Une epot spacing to aubjocL to aiamiaaUen Amphibole layer line repeat distance (0.&3nm). v/= EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= Single Fiber (1-3 IntersecUons s 1-3 fibers) Amosite Ba Bundle (>3 fibers <1 fiber diameter apart) 2Smin IllLor Crocidolite Non-asbestos C= Cluster (>3 intersecUona) I stopping Huies; ! । ', Anthophyllite Mb Matrix NSD= Ne Structures Detected L\DATA\PRIVATE\MlKBC\CAfi0VEM3 [ >90 s/C.O. or in tat 4 C.O. Tremolite Actinolite Non-Identified 9/22/08

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