Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5609 - 10/05/01 Lab Sample Mo. 6Q0S1 Filter Type MCE 25 mm Operator Clienc Spi. No, SE5-l>I0-10/5-44 Filter .A.rea 365 mrn^2 Instrument I.D. EM 10 CRX Grid I.'D. Disk No. Screen Magnification 16,400X (GO) Area 0.01124 mm"2 Comments. Acc. Voltage . 80 kv No. GO to be Analyzed _4 { 3\147 Struct. Corspd. to 70 g/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 um

XL 7 'I

Photo No. (from I in 5 as icatoa— Identify all atructurea uaing BPS Check diffraction for asbeatoa Store all unrepeated spectra— containing samples) Grid acceptance: I structures up to TOs/^m Struct, s > 0.3um ie > 5:1 Aspect Ratio <S0X undiaaolvea filter, overlapped or folded <10X parUculate coverage >S0X coverage Ks Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals <SX holes or ooaoue areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory identlflcatlan criteria observed. 'Unuaed portion Por chrysoUls: 0.73nin ipacins for (OZO) ranoctions, or niur Chrysotile 0.33nm spsoing for the layer line repeat, streaking 'Avoided portion of (110) and (130) reflectlona. or nitar Por amphiboiei: 0.33nm layer line repeat, and approx. PorUon or niUr (2mm Vida) 3.3 ratio of non-twinoed layer line ipot apseing lo •ubjeet la axaminatlon Amphibole layer Une repeat dlatance (Q.Mnm). Z- BDS ipeetrum conrormini Lo laboratory Ambiguous identification criteria observed. AMPHIBOLES Stnila Fiber (1-3 intaracctiona = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 28mm fllUr Crocidolite Non-asbestos

□ C= Cluster (>3 Intersections) f Stopping Ruiet: L Us Matrix T Anthophyllite NSDs No Structures Detected 1 >30 a/G.O. ar In lit 4 G.O. Tremolite Actinolite Non-Identified L\DATA\PRIVATB\UlKSC\CADDVKUa 9/22/98

CITY_21MC100_003099115

NYC-WTC_000182521