NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAS

Lab Sample Nc 6-515 mm opera' Clienc SpL. No. riicar Area 385 mm I.nstrumenc I.D. SM 13 'TRY :. c A- Drek No. Screen Magnif icacLor. 16.4CQX (GO: Area mrr.' Commer.iLS ACC. Volcagc SC kv No co ce Anai Zorsod mm

Length I.D. of Structure EDS GO. Structure Structure Type , N or (Nonasb. ^0.3 um ( No, Coord. No. f b c M T T < 5 um I » Sum iChrys.j Amphibole I Nonasb. jAmbig./ND Elements) I I 2. 3

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! I -------------- -------------- i __________ ______ I______ _______I______ IJ Photo No. (from I in 5 asbestos- Identify all structures using EDS Check diffraction for asbeatoa store all unrepeated spectra— containing samples] Grid acceptance: i structures up to 70a/ij<! (Let 4) <50% undiaaolved Mier, overlapped or folded Struct. = > Q.Sum Se > 5:1 Aspect Ratio <l6x particulate coverage >50% coverage Not Observed (COS spectrum or diffraction pattern) at (east 20 unfolded or overlapped grid squares Totals

n F B C M Sum <3% holes or opaque areas '= Positive diffraction pattern properties conforming to laboratory identification criteria observed. -Unuaad porUen of rater For chrysotilr. a.73nm ineeing for (OZO) rsnecUona. O.SSnm spacing for the layer Une repeat, ttraeking Chrysotile -Arotdcd portion of (UO) and (130) reflecUona. or rater For amphiboles: Q.53nm layer Une repeat, and approx. ; Portion of niter (Zmm wide) 3.3 ratio of non-tvlnned layer Une spot spacing to subjeeL to Amphibole layer line repeal distance (O.53nm).

z'- £03 (pectruni conforminc to laboratory examination h identification criteria observed. AMPHIBOLES Ambiguous F*= Single Fiber (1-3 interaectiona = 1-3 fibers) .Amoaite | f 9= Sundle {>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite ; Non — asbestosi C- Cluater i>3 interaectiona) H= Matrix ___ Steppinc Huie*; -------- ! Anthophyllite N3D= No Structure* Detected >50 ■/C.O, or in l«i 4 3.0. ' .'<on-IdenLified ! ■i^\QATA\?RlVAT£\MlKEC\CADD\XEM3 9/22/98

CITY_21MC100_002849252

NYC-WTC_000209894