NYC-WTC_000182600

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAEGROyP«;5775 -lG/26/^ Lab Sample No. S2370 Filter Type MCE 25 mm Operacor Client SdI. No, 9 Filter Area 385 inni^2 Ins crumeno I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,40QX . (GO) Area 0.01124 mm"2 Comments. Acc. Voltage 8 0 kV No. GO to be Analyzed ( 3.147 Struct. Corspd. Co' 70 s/mm"2.)

GO. Structure Structure Type Length I.D. of Structure N or EDS >0.5 um (Nonasb. No. Coord. No. F B C M J. Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um / 3..^z 3

store all unrepeated spectra—^ Photo No. (from 1 In 5 asbestos- Identify all structures using EDS Check diffraction for aabeatoa containing samples) Grid acceptance:! atructurea up to 70a/&m (l»t 4) <SQX undiaaolvea filter, overlapped or folded Struct, s > 0.5um k > 5:1 Aspect Ratio <10X particulate coverage >50% coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at leaat 20 unfolded or overlapped grid squares ^/s Positive diffraction pattern properties conforming <5% holes or opaque areas F B C- M > Sum to laboratory identification criteria observed. *Unuaed portion Por chrysotile: 0.73nm spacing for (020) reflections, of niter Chrysotile O.aanm spacing for the layer line repeat streaking -Avoided portion of (110) and (130) reflections. or niLsr Por amphiboles: 0.53nm layer line repeat, and approx. Portion of filler (2mm wide) 3.S ratio of non—twinned layer Une spot spacing to •ubject U Bxamination Amphibole layer Une repeat distance (0.53nm). EDS spectrum conforming to laboratory Ambiguous Identification criteria obaerved. AMPHIBOLES F= Single Fiber (1-3 Intersections = i-O fibers). Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluiter (>3 intenections) 25mm fill.. Crocidolite Non-asbestos J Stopping Rules; I ■ Anthophyllite M= Matrix NSD= No Structures Detected ■ [ >50 i/C.O. or In IsL 4 C.Q. Tremolite Actinolite Non-Identified L;\ DATA\ PR1VATE\ U1KEC\ CADDVEM3 9/22/S8

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NYC-WTC_000182600