TEM air analysis results, Oct 15 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5698 - lC/15/01 Lab Sample No. £1^.12 .Pi It sr Type MCE 25 mm Operator Client Spl. No. N5H5-ETR-10/15-09 Filter Area 3B5 mm^2 InscrumenC I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16.400X (GO) Area 0.01124 nnm^2 Comments Acc. Volcage 8 0 kv No. GO co be Analyzed 4 ( 3.14'7 Struct. Corspd. co 70 s/mm^2.)

GO. Structure Structure Type Length I.D. of Structure EDS >0.5 um (Nonasb. No Coord. No. F B C M Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

Ls

Store all unrepeated spectra—^ Photo No. (from 1 in 5 aabcotoa — Identify all atructurea uaing EDS Check diffraction for aabeetos containing aamples) ICrid acceptance:I ■ atructurea up to TOaZ&m (l«t 4) < 5 OX u n d la BO 1 ved ruler, overlapped or folded Struct = > O.Sum & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage N= Not Obeerved (EDS apectrum or diffraction pattern) at least 20 unfolded or overlapped grid squarea Totals ^_/= PoaiUve diffraction pattern properties conforming <SX holes or oosoue areas F B C M > Sum to laboratory identification criteria obaerred. 'Unused portion For chrywoUla: a.73nm ■pacing for (020) renaetiona. of niter Chrysotile 0.53nm apaolnc for the layer line repeat, atreaking -ATolded portion of (110) and (130) renecUoni. of niter For amphlboleai O.a3nm layer line repeat, and approx. Portion of nitar (2mm wide) 3.fi ratio of oon-lwlnoed layer line apot spacing to ■ubjeet to Amphibole layer line repeat dlalance (O.&Snm). esamlnatlon BOS apectrum conforming to laboratory Ambiguous IdenUilcation criteria observed. AMPHIBOLES P= Single Fiber (1-3 InteraecUona » 1-3 fibers) Amosite 25mm filUr B= Bundle (>3 flben <1 fiber diameter apart) _________________ Crocidolite Non-asbestos m3 SSSr *»»•"•««-”> ------ 1 supping L_ Anthophyllite NSD= No Steuoturo. Detected Tremolite Actinolite Non—Identified U\DATA\PIUVATE\l«IICBC\CJU)DVEKa B/22/BB

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