NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS GROG? Lab SarapLa No ;e .YGZ :rirr •-'P'

Client Sol. Me Fl-' Area 3 ? "nm 2 Grid Disk Nc Instrument: I. I 2M 10 Screen Magnrrrcacio.n Tn . 40QX ■:GO) Area mm Comments No . Corsod Acc. Voltage SO kV

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

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♦I Store ail unrepeated spectra I Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos containing samples) Grid acceptance;! structures up to (Hl -I) <50% undisBolvea filler averiapped or folded Struct. = > 0.5um it > 3:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <3% holes or opaque areas F B C VI > Sum to laboratory Identification criteria observed. ■Unused portion of filler For chrysotile: 0.73nm spacing for (020) reneetians. 0.53nn spacing for the layer line repeat, streaking Chrysotile ’Avoided portion of (110) and (100) reflections. or filler For araphlboies: 0,33nm layer line repast, and approx. Portion of filter (2mm wide) 3.3 ratio of non-twinned layer Une spot spacing to subject to essminaUon Amphibole layer Une repeat distance (O.SSnm).

EDS spectrum conforming to laboratory Identification cntcria observed. AMPHIBOLES Ambiguous F= Single Fiber (i-3 intersections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 2Smin filtar Crocidolite Non—asbestos «= Matrix , I 3Leppin< Huies; -------- i Anthophyllite I >50 •/□.□. ar in Let 4 G.3. MSD= No Structures Detected ■ Mon-Wenuned j L\ DATA\ PRIVATK\ MI KEC\ CADDVEk3 9/22/38

CITY_21MC100_002849264

NYC-WTC_000209906