TEM air analysis results, Oct 23 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5748 - 10/23/01 A'f'f Lab Sample No. 62063 Filter Type MCE 25 nim Operator Client Spl. No. Filter Area IBS mni'2 InscrumenL I.D. EM 10 CRX Grid 2.D. Disk No. Screen Magnification 16,400X (GO) Area 0.01124 mm^2 Comments Acc. Voltage 80 kV No. GO to be Analyzed ( 3.147 ScrucL. Corspd. Co 70 s/mm'^2.)

Length I.D. of Structure EDS GO. structure Structure Type N or (Nonasb. No. ^0.5 um No Coord. F B C M < 5 um 51 Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)

Photo No. (from 1 in 5 aabestoa— Identify all structures using EDS Check diffraction for aabestoa Store all unrepeated spectra containing samples) Grid acceptance:! atructures up to yOa/i^irr (l»t 4) <50% undiaaolved filter. overiapped or foldea Struct. = > O.Sum & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals Ns 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 taborstory identlflcatian criteria observed. •Unused portion Por chrysotile: Q.73nm spacing for (020) renecLlons, of fHUr Chrysotile 0.53nm spacing for the layer line repeat, streaking 'Avoided portion of (110) and (130) reneeUons. of niter Por amphiboies: 0.93nm layer Une repeat, and approx. (2mm wide) 3.5 ratio of non-twlnned layer Une spot spacing to Amphibole layer line repeat distance (O.SSnm). EOS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES Pe Single Fiber (1-3 Intersections s 1-3 fibers) Amosite Bundle (>3 fibers <1 fiber diameter apart) 2Smfn flltar Crocidolite Non-asbestos C= Cluster (>3 Intersections) J Slopping Rules; L M= M«Lrl« r Anthophyllite N5D= No Structure. Detected >90 b/C.O. or in lot 4 C.O. Tremolite Actinolite Non-Identified l\d*ta\pbivate\>iikbc\cadove«s 8/22/90

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