Asbestos fiber TEM analysis data sheet, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP #: 5139 22/01 Lab Sample No. 62941 Filter T/pc MCE 2 3 mm Operator Spl. No. Iter Area 353 mn' Inst.rviTient I.D. EM 10 CRX Grid I.O. ______ Dpi/ Disk No.

Screer. Magni 6 4 00X IGO: .^rea P.01124 mm"? Comments Acc VolLage 60 kV No. GC to be Analyzed _4 Corsod. co 70 s.‘mn>*2

GO. structure Structure Type Length I.D. of Structure EDS >0.5 um (Nonasb. No. Coord. No. F B C M > 5um Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um f A ft 3 4 3^?

I c I Photo No. (from 1 in 5 asbestos** containing samples) Identify all structures using EDS Grid acceptance; i Check diffraction for asbestos structures up to 70s/i?»m (l«l 4) _______ Jstore I_______li all unrepealed spectra—

<50% undisaolvea filter, overlapped or folded Struct. - > 0.5um k > 5:1 Aspect Ratio <10X particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals <5% holes or opaque areas Poaitive diffraction pattern properties conforming F B C M > Sum

TTl .o laboratory identification criteria observed. ■Unused portion For ctiryioUis: O.TSnm a|ipsclRg for (020) rsflectioni, 3.&3nm spacing for the layer line repeat, streskinf of filter Chrysotile

o 'Avoided portion >f (HO) and (K ;ao) refleetlona. of filler For amphiboles: 0.53nm ;.yor line repeat, end approx. / Portion of filter I , (2mm wide) 1.3 ratlD gf noa-twinned layer line spot spacing to I I subject to examination / J I Amphibole layer line repeat distance (D.SSnm).

= £DS spectrum conforming U) laboratory Ambiguous Identification criteria observed. AMPHIBOLES F= :>inglo Fiber (1-3 InteraecUons = 1-3 fibers) Amosite B= iundle f>3 fibers <1 fiber diameter apart) C- Cluster (>3 intersections) M= U Strix 2Smm filler -—J Stopping Ruies: L , . >90 i/G.O. or in Isl 4 G.O. I Crocidolite Anthophyllite Non—asbestos i I Tremolite NSD s No Structures Detected Actinolite Non-Identified L:\0nA\PRIVATE\MtKEC\CADDYrEM3 9/2S/9a

CONFIDENTIAL, CITY_21MC100_003470328 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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