Asbestos TEM micrograph data sheet, Lab Group 57B5, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5785 - 10/23/01

Lab Sample No. 62411 Filter Type MCE 25 mm Operator Client Spl. No. 2 Filter Area 3 85 mm'^2 Ins c rumenc I.D. EM 10 CRX Grid I.D. ------ Disk No. Screen Magnification 16,400X (GO) Area 0.01124 llim~2 Comments Acc. Voltage 80 kV -No. GO Lo be Analyzed _4 ( 3.147 Struct. Corspd. co *70 s/mfn^2.)

Length I.D. of Structure EDS GO. Structure Stniclure Type (Nonasb. No Coord. No. ^0.5 urn F B C M < 5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) / 2 ^^3 ■?

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Store all unrepeated spectra-^ Photo No. {from I in 5 asbeatos- Identify all structurea using EDS Check diffraction for aabeatoa eontaining samples) Grid acceptance: I structures uo to TOa/Aim (iBl 4) <50X undissolveQ filler, overlapped or foldea Struct. = > Q.Sum & > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Totals N= Not Observed (EDS apectrum or diffraction pattern) at ieaat 20 unfolded or overlapped grid squares <5X holes or opaque areas Positive diffraction pattern properties conforming F B C M > Sum to isboratory identification criterio observed. 'Unuaed portion Por chrysotile: O.TDnm spaelnc for (020) renecUoas. O.S3nm spacing for the layer line repeat, streaking of filter Chrysotile of (110) end (130) reflecUons. ‘Avoided portion of niter Por ampktbolea: 0.53nm layer Une repeat, and approx. Portion of niter (2mm wide) 3.& ratio of non-Lwlnned layer line spot spacing to ■ Ct to nation Amphibole layer line repeat distance (O.SOnm).

EDS apectrum conforming to' laboratory identification criteria obaerved. AMPHIBOLES Ambiguous Single Fiber (l-3 intersections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 25mm flitar --- -----1" Slepplnl Rule: I-------- Crocidolite Non-asbestos Ms Matrix Anthophyllite NSOs No Structures Detected >90 i/C.O. or in lal 4 C.O. Tremolite Actinolite Non-Identified L*\ DATA\PR1VATC\ MIKBC\ CADD^EKa B/22/Ba

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