NYC-WTC_000202627

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5€50 - 10/09,’^91 Lao Sampla No. 60714 Filter Type MCE mm Ooeratcr

Glienc Spl. No. MEHS-B>6-lQ/9-22 Filter Area 3S5 min'll

Inscruraenc I.D. EM 10 CRX Grid I.D. Disk Nc.

Screen Maqnification 1S,4OCX (GO) Area CcmmenCs

Acc. Voltags 8C kV No. GO Co be Analyzed _4 ( 3.147 Siiruot. C'jrspc 70 7G s/mro^2.!

Length I.D. of Structure N or EDS GO. Structure Structure Type (Nonasb. No Coord. No. >0.5 um F B C M < 5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)

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“store all unrepeated spectra-^ Photo No. (from 1 In S as leatoa- Identify all atnicturea using EPS Check diffraction for asbestos containing samples) iCrtd aceantance;! structurea up to TWjim (l.t 4) <S0X undlsaolved niter, overlapped or folded Struct. = > 0,5um ft > 5:1 Aspect Ratio <10X particulate covara<B >50X coverage Totals Ns Not Observed (EDS spectrum or dlffracUon pattern) at least 20 unfolded or overlapped grid square* Positive diffraction pattern properties conforming <agj^es ^opaque areas F B C M > Sum to laboratory IdenUflcaUon criteria observed. Por ahrysoUles 0,73nni acMioinc for (0X0) ra/taoUana, O.Mnm ipaoing for the layarGlac repeat, slresatog sr (HO) and (130) renecUons. -Unuwd porUon at filter ‘Aveldwt portion Chrysotile III or niter Por amphiboles: 0.53nm layer line repeat, and approx.. {Zmm Vida) 3.5 ratio of non-twlnned lajwr Una spot apaoins tn II I axamlnaUen Amphibole layer line rspsat dlitance (0.sanm). kXs EDS apeetrum eonformine to laboratory Identification criteria observed. I AMPHIBOLES Ambiguous F= aincle Fiber (1-3 iRtersectlona a 1-3 fibers) Amosite B= Bundle [>3 fiber* <1 fiber diametar apart] Cs Cluitsr (>3 InterMctiont) aimm niter Crocidolite Non-asbeatoa I--------- 3toppln< Rulsa; i-----------, Anthophyllite Ms Matrix MSD« No Slructurex Datectad { >50 i/C.O. or la 1st 4 G.O. Tremolite Non-Identified Ls\D*TA\PRINATE\mXSC\CADl^nM3 s/22/»a Actinolite

CITY_21MC100_003274240

NYC-WTC_000202646