NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAc GP.OV? 3?

Lab Sample No cer Type MC2 25 mm C'D-sra

Clrenc Spl. No Ier Area 3S; mm'

Inscrutnenc I SM 10 Grid I Wk Screen Magniii 1^.400X (GO- Area 3 mm Conmencs Acc. VoLcags 3C Nc. GO cc be Anal/' r'jcc crsrd 2 s'mrr."2

s tr u c ture?inicturr'ypc Length I.D. of Structure N or (/ EDS GO. (Nonasb. No. ^0.5 um No, Coord. IFB C M < 5 um J. Sum Chrys.! Amphibole Nonasb. !Ambig./ND Elements)

i J

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11

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I i i Photo No. (from 1 in 5 asbestos- Identify all atruc^urea using £DS Check diffraction for asbeatos Store ail unrepeated spectra containtng samples) Grid acceptance:! structures up to 70a/Am (Ist 4) Struct. = > 0.5um Je > 5:1 Aspect Ratio <S0X undiaaolved filter, overlapped or folded <10% particulate coverage >50% coverage Ns Not Observed (BOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals <5% holes or opaque areas F B C M > 5um Positive diffraction pattern properties conforming to laboratory idenUflcatton criteria observed. -Unused portion Por ehrywoUie: 0.79nm spacing far (020) rcflaetienf. O.SDnm spaetng for the layer line repeat, streaking of (110) and (130) reflections. of niter -Avoided porUon Of niter Chrysotile i Por amphiboles: 0.53nni layer line repeat, and approx. Portion of filter (2nim wide) N : subject to .Amphibole i 3.S ratio of non-tvinned layer line spot spacing to layer line repeat dlsunce (Q.S3nm).

Z® EDS ■pectrum conforming to laboratory IL— i Identification criteria observed. AMPHIBOLES Ambiguous P'S Single Fiber (1-3 InteraecUona » I-□ fibers) Amosite । f 3= Bundle (>3 fibers <1 fiber diameter apart) ___________ 25inni filter C.’ocidohte , Non-asbestosi C= Cluster (>3 intersections) M= Matrix sioppinc Rule*: i--------- - ! Anthophyllite ; NSDs No Structure* Detected >50 i/C.O, or in 1st 4 G.O. Tremolite ; . Actinolite ' Non-IdenUfied i L;\DATA\PRIVATE\MIKEC\CADD\rEM3 9/22/9fl

CITY_21MC100_002849261

NYC-WTC_000209903