NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB SP.CUF it Lac Sample Nc 9 2 5 2-- CLier.r Sol . Filler Area 3 3 5 ;nui I.iscrumenc 1.2. EM 23 CRZ Disk Nc. Screen Magiii2rcaci.cn la , 4COX 124 Tirr Commencs. Acc. Vol cage 9 0 kV Nc . 32 co be .A-nal ; 4 .'’21 Str-^ Corscd. 10 'O s/mn*2

Length I.D. of Structure EDS GO. Structure Structure Type! (Nonasb. No, Coord. No. r ^0.5 urn F B C Ml < 5 um » Sum jChrys.! Amphibole Nonasb. lAmbig./ND Elements) t ___________ 1__________ I ~7

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i I I ! I : ! I

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t_J ____ ______ !__ Photo No. (from 1 in 5 aabcatos- ! identify all atructures uatng EDS Check diffraction 'or aabeatoa _____ I_____ J/ Store ail unrepeated spectra — containing samples) Grid acceptance:! structures up to 70a/i?iin {Ist 4) Struct = > 0.5um it > 5:1 Aspect Ratio <5OX undiaaoivea filter, overlapped or folded <10% particulate coverage >S0X coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or opaque areas_____________________________ F B C M > Sum to laboratory identification criteria observed. -UnuaeO portion For ebrysotlle: 0.73nm spacing for (020) reflactlons. 0.53nm spacing for the layer line repeat, streaking of filter Chrysotile -Avoided porUon of (110) and (130) reneeUons. of filter For amphiboles: O.S3nm layer line repeat, and approx. PorUon Bf niter \ [amm wide) 3.5 ratio of non-tvinncd layer Une spot apactng to subject tn ■ xamtnaUon i 1 Amphibole layer line repaat distance (0.53nm).

z- EDS spectrum conforming to laOoratory identification criteria observed. AMPHIBOLES Ambiguous r= Single Fiber (1-3 intereectiona = 1-3 fibers) Amosite 3= Sundie (>3 fibers <1 fiber diameter apart) C= Cluster (>3 >ntarsecllona) ' 25mm niUr Crocidolite Non-asbestos 11= Matrix . stopping Rules: -------- AnLhophyilite | NSO= No Structures DctecUd >50 s/G.O. or in Isl A G.O. Tremolite i , Actinolite i >'on-!‘len>-ifxed L\DATA\PRIVATE\MlKZC\CAD0\rEM3 9/22/98

CITY_21MC100_002849272

NYC-WTC_000209914