NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS V-P # : Lao Sample No 62524 MCE 'nm

ClL Scl No er Are?. 3 9 r ■Tiir * Instrutnenc EM :: . :.D 213k Nc.

in Magni^-cacion 15,4OOX Area mm' Conmen! ACC Vcicage i^Q kV Nc c* Ana3.72ed 4 Struct: - CorsDd mm'

GO. Structure Structure Type Length I.D. of Structure [ EDS N or >0.5 um I ■i (Nonasb. No Coord. No. F B Ic M > Sum iChrys.l Amphibole Nonasb. Ambig./NDl Elements) < 5 um i

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i i ! i u______ Photo No- (from 1 in 5 asbestos- containing sampteal I I I i I_______ !_______ Identify all structures uaing SDSJ Cnd acceptance:! Check diffraction for asbestos structures up to 7pa/i^m (Ist 4) store all unrepealed spectra <50X undissolvea filter, overlapped or—tolded Struct. = > O.Sum k > 5:1 Aspect Ratio <I0X particulate coverage >50X coverage Ns Not Observed (EOS spectrum or diffrsctlon pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identldeatlon criteria observed. ■Unused portion of niter 1 For chryaoUla: O.Tdam spacing (or (020) rsflsctions. 0.23nm spacing for the layer line repeat, streaking Chrysotile i -Avoided portion of (110) and (130) reneeuena. of niter For amphiboles: O.dSnm layer line repeat, and approx. (2mm wide) 3.3 ratio of non-Lwinned layer Une spot spacing to Amphibole layer Une repeat distance (0.53nm|.

EDS spectrum conforming to laboratory identification criteria observed. .4MPHIB0L£S J Ambiguous Rs Single Fiber (1-3 intersections = 1-3 Tibera) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 2= Cluster (>a intersecUona) 2Smm filler Crocidolite ‘ Non-asbestos M= Matrix -------- i stopping Huies: -------- 1 .Anthophyllite ; >50 s/G.O. ar in 1st 4 G.O. NSO= No Structures □olecLea Ic!mom: ' Non-ldentified L\0ATA\PRIVATE\MJKBC\CAD0>qrSM3 9/22/98

CITY_21MC100_002849260

NYC-WTC_000209902