NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS ■- Cl ■' 2

Lac LampLe Nc m.Ti

Nc . 27 rer Are?. 285 rrm'

Instrument: 2Y 2? GRY id I. D Y£6 aK Nc

reen Macnizicacion la.4OCX Area mm Comments Acc. Volcage SO kV No. GO so be Analyses ' 4.722 -nr

Length I.D. of Structure N or EDS GO. Structure structure Type j j (Nonasb. ^0.5 um No. Coord. No. F M B Ic < 5 um Sum Chrya.i Amphibole Nonasb. Ambig./NP! Elements) /

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u I 1 i i ♦ Photo No. (from I in 5 asbestos- I i 5 ! ! Identify all structures using SDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance:! structures up to TOaZAin (UI 4) <50% undisaalved filter,- overlapped or folded Struck = > a.Sum it > 3:1 Aspect Ratio <10X particulate coverage >50X coverage Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. -Unused portion of filter For chryaotUe: Q.73nm spacing for (OZQ) rsflections, 0.53001 spacing for the layer line repesU strsabiog Chrysotile -Avoided portion of (110) and (130) ranecUons. of filter For amphiboles: O.SSnm layer Une repeat, and approx. Portion of filter (2mm wide) 3.5 ratio of non-tvtnncd layer line spot ■paeing to layer line repeat distance (O.SSnm). I subject to examination Amphibole i

EOS spectrum conforming to laboratory Ambiguous j identification criteria observed. AMPHIBOLES j Fs Single Fiber (1-3 intersections = 1-3 fibers) Amosite i 3= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter i Crocidolite i Non —asbestosi G= Cluster l>C intersections) M= Matrix SLoppinc Rules: :-------- i Anthophyllite • r >50 i/C.O. or in Isl 4 G.O. NSDs: No Structures Detected Zmoht: ' Non-Identified ) L\QATA\PRIVATE\MlKZC\CADD^TSa3 9/22/98

CITY_21MC100_002849262

NYC-WTC_000209904