NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS DA2 GROU? 4 .6 'T.

lac imincie Me 5 2 51'? r TNxe MCE 2 5 'n7

lenc So2. No. Filler .Area 385 ~.n'l

Inscrumenc Z.D EM Grid I.D. Y'6 Disk No.

Screen Magnicxcation 15,400/ ;GC! Area Tim' Comme;

Aco. Voltage 8 0 kV No. GO so be AnaL> SC roc ■rsDd 3 ■' T.T * 2

Length I.D. of Structure EDS GO. structure Structure Type N or (Nonasb. No Coord. No. Fi B C IM ^0.5 um Sum jChrys. Amphibole Nonasb. lAmbig./ND Elements) < 5 um

-.7!

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! I S i I (i I ; ""Photo No. (from I in 5 aabestoa- I I ' Identify all structures uaing SDS I Check diffraction for aabestoa i 1 store all unrepeated spectra Jj containing samples) Grid acceptance:! structures up to 70a/i^m (lit 4) <S0X undiaaolved niter, o^rlapped or foidei Struct. = > 0.5um It > 5:1 Aspect Ratio <10X particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M > Sum to laboratory identification criteria observed. For chrysotile: 0.73nm spacing for (020) rsnoeUons. 0.33nm spacing for the layer line repeat, itreaiuni of (110) and (130) reneeUona. Unused portion of niter ■Avoided portion of niter Chrysotile I TH For smpblboies: O.SSnm layer line repeat, and apprea. Portion of niter {2mm wide) 3.3 ratio of nan-twinned layer line spot spacing to bject la minetion Amphibole layer line repeat distance (0.33nm).

v/= EOS (pectrum conforming to laboratory identification criLeria observed. .XMPHIBOLES Ambiguous I Fa Single Fiber (1-3 intersections a 1-3 fibers) Amosite 9= Bundle (>3 fibers <1 fiber diameter apart) aStnni niUr Crocidolite ' Non-asbestosi C= Cluster (>3 interaectiens) Ms Matrix —SUipptnc Rules: Anthophyllite i >30 i/C.Q. or in lai 4 G.O. Tremolite NSD= So Structures Detected ; Non-Identified ; ' Actinolite u\3ATA\.’RIVATE\MIKEC\CADD>3'EM3 9/32/2B

CITY_21MC100_002849255

NYC-WTC_000209897