Asbestos TEM analysis results, Oct 19 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP ft: 5730 - 10/19/01 Lab Sample No. 61701 Filter Type MCE 25 mm Operator Client Spi. No. 11 Filter Area 385 mni*2 Inscrumenc I.D. EM 10 CRX Grid I.D. Disk No, Screen Magnification 16,400X (GO) Area 0.01124 mm"2 Comments Acc. Volcage 80 kV No. GO to be Analyzed _4 ( 3.147 Struct. Cor sod, io 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 Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

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Photo No. (from 1 in 5 aabeatoa- Identify all atructurea using EDS Check diffraction for aabeatoa Store all unrepeated apectra— containing samples) Grid acceptance:! atructurea up to TOa/mm (let 4) StrucL = > O.Sum ^' > 5:1 Aspect Ratio <S0X undiaaolvea nuefrovenappea or folded <10X particulate coverage >S0X coverage Totals N= Not Observed (EDS Bpcctrum or diffraction pattern) at least 20 unfolded or overlapped grid aquarea <SX holes or opaoue areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory idcndflcaUon criteria observed. 'Uouaed portion Por chrywUle; O.Tanm *006101 for (020) renselien*, of fllLsr Chrysotile O.OOnm ipaclng for the layer line repeal. ■Ireaklng of (liO) and (ISO) ronecUon*. y: 'Avoided portion of niter Por amphiboleB: 0.9Snm layer line repeal, and approx. Portion of filter (Smm vldo) 3.0 ratio of non-twinned layer Une apet apaelng to •ubjecl Lo Amphibole layer Una repeat diatance (O.Unm). examination

EDS Bpeetrum conforming to laboratory Ambiguous idenUfioaUon criteria observed. AMPHIBOLES P= Single Fiber (1-3 Inlersection* a 1-3 flbcri] Amosite B= Bundle (>3 fibers <l fiber diameter apart) Zamm niLar Crocidolite Non-asbestos

□ C= Cluster (>3 Intersections) f Slapping Rules: L Ms Matrix r Anthophyllite NSD= No Structures Detected | >90 a/G.O. or In let 4 0.0. Tremolite Non-Identified L;\DATA\PRIVATE\>((ICRC\CADD\TEM3 0/22/06 Actinolite

CITY_21MC100_003099587

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