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. 22733 Filcer Type MCE mm Operator Client Spl. No. 13 Filter Area 385 fnin*2 Instrument I.D. EM 10 CPJC Screen Macrnification 16,400X Grid I.D. <G0) Area — 4^ 0.01124 mni"2 Disk No. Comments Acc, Voltage 80 kV No. GO co be Analyzed __4 I 3.147 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 uin

3 ^.3

Store all unrepeated spectra—^ Photo No. (from 1 in 5 asbestos- Identify all atructurea using EDS> Check diffraction for aabeatos containing samples) Grid acceptance:! structures up to TOs/^m (I a t 4 J <S0X undiasolveo TiiurrT overlapped or foldea Struct. = > Q.5um & > .5:1 Aspect Ratio <IOX particulate coverage >60% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive'diffraction pattern properties conforming <SX holes or opaque areaa F B C M > Sum to laboratory identification criteria observed. -Unuaed portion For chrysotile; 0.73nm spacinx for (D20) reflections. O.SSnm spacing for the layer line repeat, streakinc of filter Chrysotile 'Avoided portion of (UO) and (130) reflections. of filter Por amphiboles: 0.53nm layer line repeat, and approx. Portion of filter (2min wide) 3.5 ratio of non-twinned layer line spot spacing to aubject to Amphibole layer line repeat distance (O.SSnm). examination

s/s EDS spectrum conforming to laboratory Identiflestion criteria observed. AMPHIBOLES Ambiguous Fs Single Fiber (1-3 IntersecUona s 1-3 fibers) Amosite B= Bundle (>3 fibers <l fiber diameter apart) 25mm filLar Crocidolite Non-asbestos C= Cluster (>3 intersections) ■ J Stopping Rules; I ■ Anthophyllite M= Matrix NSD= No SLructurea Detected L:\DATA\P1UVATF\M1KEC\CADO\7EM3 [ >50 i/C.O. er in Ist 4 G.O. Tremolite Actinolite Non-Identified 9/22/98

CITY_21MC100_003100016

NYC-WTC_000182613