NYC-WTC_000188637

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5666 - IQ/ll/Ol Lab Sample No. 60929 Filcer Type MCE mm Opsrator Client Spl. No NSKS-SIR>1Q./11-O2 Filter Area 3 65 mn<2 Instrument I.D. EM 10 CRX Grid i.D. Disk No. Screen Macnification 16,400X (GO) Area C. 01124 mm Comments Acc. Voltage 80 kV NO. GO co be Analysed _4 (.3.147 Struct. Corspd. 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 » 5um Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um / ((

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1 Photo No. (from 1 in 5 asbestos^ Identify <11 aLructurea uaing EDS Check diffraction for asbeatoe Store all unrepcated spectra—^ containinc samples) structures up to 70a/^m Grid acceptance:! tl«l *) SLrucL = > D.5um A > 5:1 Aspect Ratio <S0X undissolvea filler, overlapped or folded <10X particulate coverage >50% coverage * Ns Not Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquares Totals <SX holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory identification criteria observed. 'Unused portion Por ohry 0.73nm apaein* for (020) roflecUona, of niter Chrysotile C.S3am apocinf for Lh«I layer line repeat, etreakin< of (110) and (130) reflections. Ivoided portion of filter For amphiboles: O-Mnm layer line repeat, and approx. (2mm wide) 3.9 ratio of nen-tvinncd layer line spot spacing te Amphibole layer line repeat distance (O.S3nm). v/w EDS apoctrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= Single Fiber (1-3 Interaections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 25mm niter Crocidolite Non-asbestos £» lnU.r..cUon.) --------- J SUppl.| Bul» I--------- - Ms Matrix Anthophyllite NSDs No Structures Delected >90 «/C.O. or tn laL 4 G.O. Tremolite Actinolite Non-Identified k\DATA\PIUVATE\MIICEC\CADDSrEM3 0/22/98

CITY_21MC100_003082124

NYC-WTC_000188637