Asbestos TEM micrograph data sheet, Lab Group 5793, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5793 - 10/30/01

Lab Sample No 62226 Filter Type MCE 25 mm Operator Client Spl. No. 6 Filter Area 335 nini~2’ InsCrumenc I.D. EM 10 CRX Grid I.D. Disk No. Screen Maonification 16,400X (GO) Area 0.01124 mm^2 Comments Acc. Voltage 80 kV No. GO to be Analyzed _4 (■2.147 Scrucc. Corspd. co 70 s/tnro^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

2. J

Photo No. {from 1 in 5 asbeatoa- Identify all atructurea using EDS Check diffraction for asbeatoa Store all unrepeated spectra containing aampiea) Grid acceptance: I structures up to 70»/^m (lai 4) <S0X undiBBolvetf filter, overlapped or folded Struct. = > Q.5um & > SU Aspect Ratio <10% particulate coverage >50X coverage at least 20 unfolded or overlapped grid squares Totals Ns Not Observed (EDS spectrum or diffraction pattern) Positive diffraction pattern properties conforming <SX holes or opaque areas F B C M > Sum to laboratory identifies Lion criteria observed. -Unuied portion For chrysotile: Q.73nm spacing for (020) renections, of filter Chrysotile □.SOnm spacing for the layer line repeat, streaking 'Avoided portion of (110) and (130) reflecUons. of filter For amphiboles: O.Oanm layer line repeat, and approx. (2mm wide) 3.8 ratio of non-tvinned layer tine spot spacing to •ubjBCt to Amphibole layer 11ns repeat distance (O.SSnm). I examination /

v/= EDS spectrum conforming to laboratory Identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 interaections s 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 28mm filter Crocidolite Non-asbestos C= Cluster (>3 Intersections) stopping Rules: L__-_. Anthophyllite . Ms Matrix । [ NSD= No Structures Detected >80 s/C.O. or in Isl 4 C.O. Tremolite Actinolite Non-Identified L\DATA\PRIVATE\MlKBC\CAD0\rEM3 0/22/96

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