NYC-WTC_000188640

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5676 - 10/13/01 Lat Sample No. £1046 Filter Type MCE 2 5 mtn Operator 2^ Client Spl. No. NSHS,;EJR.J^02122^ Filter Area 38S mm"2 Instrument I.D. EM 10 CFtX Grid I.D. Disk. No. Screen Magnification 16,400X (GO) Area C.01124 mm"! Comments Acc. Voltage eo kV No. GO to be Analysed 4 ' 3.147 Struct. Corspei. to 70 s/mni"2.;

GO. Structure Structure Type Length I.D. of Structure EDS >0.5 um (Nonasb. No. Coord. No. F B C M Sum Chrya. Amphibole Nonaab. Ambig./ND Elements) < 5 um f Zl- ? <7/^/ J Zz_ D7

Store all unrepeated spectra—^ Photo No. (from I In 5 asbestos- dentify all atructurea using EPS Cheek diffraction for ubestos containing samples) Grid acceptance:I structures up to TOs/mm (lot 4) <50% undiBsolveo filter, overlapped or folded Struct, s > 0.5um k > 5:1 Aspect Ratio <10X particulate coverafe >S0X coverace Totals Ns Not Observed (EDS spectrum or diffraction pattern) at leaat 20 unfolded or overlapped (rid squares y/s Positive diffraction pattern properties conforming <5% holes or opaque areaa F B C M > Sum to laboratory identifleatlon criteria observed. -Unused portion For ehrysoUle: O.TSnm spacing for (020) rsflecUons, of niter Chrysotile 0.93nni spasing for the laysr llns repeal, streaking 'Avoided portion of (HO) and (190) reflecUons. of niter Por amphiboles: Q.&3nm layer line repeat, and approx. (Smm wide) a.a ratio of non-twinned layer line spot spacing to Bubject to 1 examinaUon / 11 ' Amphibole layer Une repeat dletanee (O.SSRm). \Zs EDS xpeetrum conforming to laboratory Ambiguous IdenUflcaUon criteria observed. AMPHIBOLES P= single Fiber (t-3 Intersection! = 1-3 fibers) Amosite Bs Bundle (>3 fibers <L fiber diameter apart) C= Cluster (>9 intersections) 2&mn niter Crocidolite Non—asbestos Rules* t______ , Anthophyllite Ms Matrix NSD= No Structures Detected L-\DATA\PRrVATE\MIKKC\CADDVKM3 0/22/98 [ >50 a/C.D. ar in lat 4 C.D. Tremolite Actinolite Non-Identified

CITY_21MC100_003082158

NYC-WTC_000188640