Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #; 560C - 10/05/01 ■

Lab Sample No. 6Q076 Filter Type MCE 25 mm Opera Client Spl. No. SHS-OBN&R-10/5-08 Filter Area 385 mm^2 Instrument I.D. EM 10 CRX Grid I.D. fo Disk No. Screen Magnification 16,40QX (GO) Area 0.01124 tnm'^2 Comments, Aoc. Voltage 80 kV No. GO to be Analy.zed 4 ( 3.L47 Struct. Corspd. to 70 s/mm**?.}

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

Store all unrepeated spectra—^ Photo No. (from 1 in 5 asbestos- . Identify all structures using EDS Check diffraction for aebesLos containing samples) Grid acceptance:! gtructurea up to 70a/Am (lit 4) <S0X undioaolved filler, overlapped dr folded Struct. = > O.Sum k > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at leaat 20 unfolded or overlapped grid squares ,/= Positive diffraction pattern properties conforming <SX holes or opaque areas F B C M > Sum to laboratory identification criteria observed. ■Unused portion For chrysotile: 0.73nm spacing for (020) reriectlons, of filter Chrysotile O.&Snm spselng for the layer Une repeat, streaking ivoided portion of (ItO) and <130) reflecUona. of filter For amphiboles: O.&anm layer line repeat, and approx. Portion of niter (Smin vlde) 3.3 ratio of non-tvinned layer line spot spacing to subject to esaminatioci Amphibole layer line repeat distance (O.SSam). \/= EOS spectrum conforminf to laboratory idontiricnUon criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibers) Amaaile B= Bundis f>3 fibers <1 fiber diameter apart) __________ gamm filter Crocidolite Non-asbestos C= Cluster (>3 intersections) ( Stepping Rule*: L____ Us Matrix Anthophyllite NSDs No Structures Detected >60 >/C.O. or In lot 4 C.O. ] Tremolite Actinolite Non-Identified L:\ DATA\ P R1VATS\ M11CBC\ CADD'^EM3 «/28/SB

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