NYC-WTC_000230538

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5 I0z^02/01 Lah Sample Nc. S?907 Fl.!ter Tyce MCE 2 5 mrr; Ccersr.or O'- CllenL Spl. No. P5234M-E5-10/2 335 > Instrument I.D. DM IQ CRI< TaXyiTA risk No. Comments Screen Magnific.azLon IgjIOOX IGO) .Area 0.01124 mm^2 Acc. Volzage 3 0 kV No. GO to be Analyzed 3 147 .Scrucc. Ccrs-od. So 70 s/mm' )

GO. structure jSUuctMre Type Length I.D. of Structure EDS >0.5 um (Nonasb. No, Coord. No. Sf B C M > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

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Photo No. (from 1 in 5 asbeatoa- Identify all structurea aaing SDS> Check diffraction for asbesloa tore all anrepeated spectra containing samples) Grid acceptance:! structures up to 70a/Am (I a t 4) <50X undiaaoived Fiiler, overlapped or folded Struct, = > O.Sum k > 5:1 Aspect Ratio <10X particulate coverage >S0X coverage Not Obaerved (EDS apectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Poaitive diffraction pattern properties conforming <5X boles opaque areas F B C M > Sum to laboratory idenUficatlon criteria obaerved. -Unuaed porUoB For ctaryaotila; Q.TSnm apacing for (QZQ) reflections. of niur Chrysotile O.aanrn loaclag for Uie layer line repeat, streaking ‘Avoided portion of (110) and (130) rafleetlona. of niur For amphiboiea; O.SSnm layer line repeat, and approx. Portion of filter (Zmni wide) 3.a ratio of non-twlnned layer Une ipot apactng to subject to eaaminnUon Amphibole layer Une repeat diitancs (0.53nm). EDS apectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLSS P= 3in<lB Fiber (1-3 Interaectloni a 1-3 Hbera) Amosite 8= Bundle (>3 fibers <1 fiber diameter apart) C= CluBiar {>3 Interaectloni) ZSmni altar Crocidolite Non—asbestos ........i Slapping Hui—; I------ Anthophyllite M= ilatru NSD= No Structurei Detected >50 t/G.3, ar la tat 4 3,0. Tremolite Actinolite Non-ldentified L:\D*TA\PHIVATB\MIKK:\CADD\rXM3 B/aa/oa

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SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230538