Asbestos TEM micrograph data sheet, Oct 26 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 57'^5 - 1C/26/C1 Lab Sample No. iJIX FilCer Tyre MCE mm Operacor Client Spl. Nc. Filcer Area 365 mm~2 Irisirument I . D. EM IC CRX Grid I.D. SK Nc. ScT'sen Magnif icacion 1: , 4Q0X (GO) Area 0.01124 mm' Commencs Acc. Voltage eo kY No. GC to be Analyzed 3JJ2ScxiJCt^Cor^pd^zc70_s2jrfTCj2

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

.__________ _____________ -store Jj Photo No. (from I in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos all unrepeated spectra--' containing aamplea) Grid acceptance:] structures up to 70a/i^m (l»t ♦) <S0X undisBolved filter. overlapped or folded Struct. = > 0.5um > fi:l Aspect Ratio <10X particulate coverage >50X coverage at least 20 unfolded or overlapped grid squares Totals Ns Not Observed (EDS spectrum or diffraction pattern) <5S holes or opaque areaa F B C M > Sum Positive diffraction pattern properties conforminK Ip laboratory identification criteria observed. -Unused portion Tor chrysotile: 0.73nm spacln( for (020) reflecUana, of filter Chrysotile O.SSnm spaeinc for the Uysr Jine repeat, streaklnf -Avoided portion Ilf (110) and (130) refleetlons, of filter I’or amphiboles: O.SSnm layer line repeat, and approx. Portion of filter (Zmm wide) U.S ratio of non-twinned layer line spot spaeinc to subject to examinsLion Amphibole layer line repeat distance (O.SSnm). v/= EDS spectrum conforminc to laboratory identification criteria observed. AMPHIBOLES Ambiguous Ps Single Fiber (1-3 Intersections = 1-3 fibers) Amosite B- Bundle (>3 fibers <1 fiber diameter apart) C» Cluster (>3 intersections) 2Smtn filler f Stopping Rules: L—_ Crocidolite Non-asbestos Ms Matrix T Anthophyllite NSD-- No Structures Detected >50 </C,0. or In lot 4 C.O Tremolite Actinolite Non-Identified L:\DATA\PRlVATE\MIKEC\CKDD';rEll3 9/22/9B

CONFIDENTIAL, CITY_21MC100_003473396 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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