NYC-WTC_000202627

NYC 9/11 Public Portal Document

ATC ASSOCIATES. INC. TEM ANALYSIS L?xE GROUP K: =550 10^39/01 Dab Sample No. 606S7 Filter T/pe MCE 2S nm Opsracov Client Spl. No. MBKS-3>6-10/?-0S Filter Area 385 iron''2 Inscrumenc I.D. S.M IC CRX Grid I.O. Disk -No Screen Macnificacicn 15,400X !G0) Area 0.01124 mm"2 ConmeriLS Acc. Volcage 5 0 kV No. GO tc be Analyzed ; 3.147 Strucr. corsDd C s/min*'".’

GO. Structure Slru.lur. Tjp. Length I.D. of Structure N or EDS >0.2 um (Nonasb. No. Coord. No. F B C » Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

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Photo No. (from 1 in 5 asbeatoi [dentify all atructurea { Check diffraction for asbestos Store atl unrepeated apectra containing aamplea) Grid aceeptance: structures uo to 7Gs/iwn (1.1 4) Struct. = > 0-5um k > 5:1 Aspect Ratio <90X undiaaolvec niter, overiap^d or folded <10X parliauiate coverage >50X coverage Ns Not Observed (EDS spectrum or diffraction pattern) at leant 20 unfolded or overlapped grid squares Totals ys Positive diffraction pattam properties conforming <8% holes or oeaoue areas F B C M > Sum to laboratory IdenUflcaUon criteria observed.

III _auMd portion Per ehiyseUlK a.79nm .Meins for (090) roflaadons. ar niur (tSanin spasina for ths layer line repeat, streakiu Chrysotile of (110) and (130) refleeUona. -Avoidad portion of filUr for amphiboles: 0.saBm layer Uns repeat and approx. {Zmm wide, 15 ralio af non-tviooed layer line ipot apaalna la Amphibole layer line repeat distanee (O.Mnm). '/A EDS spectrum conforminc to laboratory idenUiicatiQR criteria observed. AMPHIBOLES Ambiguous pB Slncle Fiber (1-3 IntenecUcna = 1-3 fibers) Amosite B= Bundis (>3 fibers <1 fiber diameter apart) C= Cluster <>3 inlarMctlons) 2Smm niL-r Crocidolite Non—asbestos I----------3b.,.ta< Hum 1----------- 1 Anthophyllite Mb Matrix NSD= No Structures Oetectad >ao «/C.O. or In 1st * 0.0. Tremolite Actinolite Non-Identified L:\OATA\P!WV*TE\MIKIC\CADD’gTH3 0/22/08

CITY_21MC100_003274223

NYC-WTC_000202629