TEM analysis data sheet, sample 59748, September 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #■• 55"/9 - 09/29/01 Filter Type MCE 25 mm Operator h ' 0 *^-^7 ijab Sample No. 59748 u Client.Spl. No, T25 Filter Area 385 mm*2

Instrument I.D. EM 10 CRX Grid I.D. 4^ Disk No.

'Screen Macnification 16,4C0X (GO'i Area 0 . 01124 'rnin^2 Comments.

Aco. Voltage 8 0 kV No. GO to be Analyzed __6 ( 4.721 Struct . Corspd. to 70 s/mm'^2. )

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

1?

Photo No. (from 1 in 5 asbestos- Identify all structurea using EDS Chec„c ------ diffraction ---------- for asbestoa -------------- Store all unrepeated spectra containing samples) Grid acceptance;! structures up to TOs/mm (l»t 4) fO <50% undisBolved filler',"overlapped or folded Struct. = > 0.5Qm & > 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 <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. ‘Unused portion of filter For chrysotile: 0.73nm spacing for (020) renecUons, 0.53nm spacing for the layer line repeat, streaking Chrysotile -Avoided portion of (110) and (130) reflections. of niter For amphiboles: 0.S3nm layer line repeat, and approx. Portion of filter (2mm wide) 3.5 ratio of non-twlnned layer Une spot spacing to subject to examination Amphibole layer line repeat distance (0.53nm). EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= Single Fiber (1-3 intersections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 25mm niter Crocidolite Non-asbestos Us Matrix ____ I stopping Rules: I——. Anthophyllite NSD~ No Structures Detected >50 s/G.O. or In 1st 4 G.O. Tremolite Actinolite Non-Identified L;\DATA\PRIVATS\MIKEG\CAQDV7EM3 9/22/9B

NYC-WTC_000174855