Asbestos TEM micrograph data sheet, Oct 27 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS Lab Sample No. Client £pl. No LAB GROUP 5784 - 1U/2^ZC1 Filter Type MCE 25 mm Filter Area 385 mm“2 Op- xc Insti-urr.ent I.D. EM 10 GRX Grid I.D. -W- Disk No.

Screen Maanificacion 15,<00X (GO; Area 0.01124 nm CommeiiLs

Acc. Vcltage 8 0 kV No. GO to be Analyzed 4 3.147 Struct. Corspd. to 70 s/TTim"2.>

jiO Length I.D. of Structure EDS structure Structure Type (Nonasb. No. >0.5 um No. C:oord. F B C M < 5 um Sum Chrys. Amphibole Nonasb. lAmbig./ND Elements) / J AW /( 1 ■u '<1 r/

//I/

^^Photti No. (from 1 in f) asbestos- Identify all structures using EDS Check diffraction for aabeatos Store all unrepeated spectra containing aamplea] Grid acceptance:! structures up to TOa/Am (l.t <1 <S0X undiaaolvea filler, overlapped or folded Struct. = > O.Sum & > 51 Aspect Ratio Not Observed (EDS apeetrum or diffraction pattern) <tOX particulate coverage >S0X coverage at least 20 unfolded or overlapped grid aquarea Totals <SX holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming Ic' laboratory Identification criteria observed. -Unused portion For ehrysatilB! Q.73nm spacini for (020) reflecUona, of filter Chrysotile j 0.59nm spacing for the layer Une repeat, etreaklng "Avoided portion a( (HO) and (130) reflectluna. of niter For amphiboles: 0X3nm layer Uns repeat, and apprex. PerUon of fllUr {Srnm wide} 3.3 ratio of non-twlnned layer Une spot spacing to I subject to examtnallan Amphibole layer line repeat diaLance 'Q.53nm). i/s EDS spectrum conforming to laboratory Ambiguous identification criteria obaerved. AMPHIBOLES F= Single Fiber (1-3 intersectiona » 1-3 fibers) Amosite B= Bundle {>3 fiber* <1 fiber diameter apart) Cluster (>3 intenectluna) 25mm filter Crocidolite Non-asbeatos J stopping Rule*: 1.. Anthophyllite M= M.Lril NSD= No Structures Detected L:\DA*A\PR1VATB\MIKBC\CADD'7EU3 9/22/8B E>50 ./C.O. or in let 4 C.O. Tremolite Actinolite Non-Identified

CONFIDENTIAL, CITY_21MC100_003473442 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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