Asbestos TEM analysis results, Oct 19 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP#: S730 - 10/19/01 Lab Sample No. 51711 Filter Type MCE 25 inm Operator Client Spi. No. 21 Filter Area 385 mm*! Inscrumenc I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnificacion 16,4ODX (GO) Area Q.01124 mm"2 Commencs Acc- Voltage 80 kV No. GO CO be Analyzed _4 ( 3.147 Struct ■ Corspd. co 70

GO. structure SlrucLure 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

Store all unrepeated spectra^ Photo No. (from 1 in 5 asbesLoa- Identify all 8tructurea UBin£^S Check diffraction far aibealas containing samples) Grid acceptance: I Btructurea up to 70«/i^rn (lai ♦) <50X undisoolved filler, overlapped or folded Struct. = > D.Sum Ic > 9:1 Aspect Ratio <IOX particulate coverage >50X coverage Totals Ns Not Observed (BDS apeetrum or diffraction pattern) at leant 20 unfolded or overlapped grid squares Poattlve diffraction pattern prepertle! conforming <SX holes or opaque areaa F B C M > Sum to laboratory Identification eriterla observed. 'Unused portion For ehrymtile: 0.73nm apacing for (020) reflecUona. of niter Chrysotile Q.33nm apaetng for the layer line repeat, streaking 'Avoided porUon of (110) and (130) refleetlont. er niter For amphiboles: O.Mnm layer Une repeal, and approx. Portion of filter (2mtn wide) 3.8 ratio of non-lwinned layer Une spot spacing to luOJect to Amphibole layer line repeat distance (O.Unm). examination

BDS spectrum conforming to laboratory identlficaUon criteria observed. AMPHIBOLES Ambiguous P= Single Fiber (1-3 intersecUono =1-3 fibers) Amosite B= Bundle (3*3 fibers <1 fiber diameter apart) ZSmm niter Crocidolite Non—asbestos C= Cluatar (>3 interaecUons) I stopping Ruiea; I ■■ ■ Anthophyllite Ms Matrix NSD= No Structure! Detected >S0 «/C.O. or in 1>1 A C.O. Tremolite Actinolite Non-ldentified L:\DATA\PWVATP\MIKBC\CADD\r2K3 0/22/08

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