NYC-WTC_000188653

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5-709 - 10/16/01 Lab Sample Nc . £14 41-) Filcsr Type MCE 25 mm Operator Client Spl. No. NSHS-EIR-10/16 Filter Area 385 mm' Instrument I.D. EM 10 CRX Grid I.D. DisK No. Screen Magnification 16,4 OQX (GO) Area 0.31124 mm^2 Comments Acc, Voltage 8 0 kV No. GO Co be Analyzed _£ ( 3.147 Struct. Corspd. Co 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. Atnbig./ND Elements) < 5 um

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Store all unrepeaLed apectra-^^ Photo No. (from 1 in 5 aabeatoa- Identify al! atructurea uaing EPS Check diffraction for asbealoa containinf aamplea) Grid acceptance: I _____ atrueturei up to 70»/An (l»t 4) Struct. = > O.Sum ft > 5:1 Aspect Ratio <50X undiasolveo filter, overlapped or foidea <10% particulate coverage >50% coverafe N= Not Obaerved (BOS apectrum or diffraction paUem) at leant 20 unfolded or overlapped grid aquarea Totals Positive diffraction pattern properties conformini <SX holea or onaque areaa F B C M > Sum to laboratory idenUflcation criteria observed. ■Unuaed portion For chrysoUts: O.Tanm spacing for (020) reflscliana, of niter Chrysotile o.53nm spacing for the layer line repeat, streaking ‘Avoided portion of (liO) and (130) renocUona. of filter Por amptUboisa: Q.93am layer Una repeat, and apprea. Portion of niter {2mm wide) 3.S ratio of non-tvinned layer Une spot spacing to aubject tn examination Amphibole layer line repeat distance (0,a3nm|. EDS spectrum conforming to laboratory Ambiguous idenUricaUon criteria obaerved. AMPHIBOLES F= Single Fiber (1-3 interaecUona a 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart} ... ............ . ZSmtn niUr Crocidolite Non—asbestos

□ Cjs Cluster (>3 Intersections) fT ‘ ““ 1 Mas Matrix j--------- 1 Stopping Rules: I------ Anthophyllite NSDa No Structures Detected | >00 «/C.O. or in 1st 4 C.O. Tremolite Actinolite Non-ldentified l:\DATA\PBIVATt\MIKKG\CADDVEKa 8/22/08

CITY_21MC100_003082269

NYC-WTC_000188653