NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LA£ GROUP 4 ■ 25/c; Lao Samp'.a Nc .er T:.-pe MCI 2 9 mm C-ienc . Ll^er .Area 25 =: mrr. 2 Zr.scrumer.c 2.0. £M 12 Grid I.D Disk Nc. Screen Magnicicacior. 15,400X (GCi -Area 124 mm Oommencs Aco. Voioage 9 0 kV No. GO CO be .Analyzed ■nn

GO. Structure Structure Type Length | I.D. of Structure EDS >0.5 um ! Z ~ ( J (Nonasb. NoJ Coord. No. F B C M < 5 um 1 Sum !chrys,l Amphibole Nonasb. sAmbig./NDi Elements) 7L^ 4^

□ J ---

I ! f i I Photo No. (from 1 in 5 asbeatos- Identify all structures uaing EDS Check diffraction for asbestos store all unrepeated spectra containing samples) Grid acceptance;! atructures up to 70a/t?im (l»t 4) <30% undiasolvea filter, overlapped or folded Struct, s > 3.Sum Ie > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Ns Not Observed (EDS ■pectrum sr diffraction pattern) at least 20 unfolded or overlapped grid squares Totals. <5% holes or opaque areas Positive diffraction pattern properties conforming F B C M > Sum to laboratory identification criteria observed. UnuBttd portion For chrysotile; Q.73nm •peeing for (020) reflections. of niter Chrysotile O.Oanm spacing for the layer line repeat, streaking at (liO) and (100) reneeUana. ‘Avoided portion of .'liter Fer amphlbeies: Q.SOnm layer line repeat, and approx. '2mm wide) 3.5 ratio of non-lvtnned layer line spot spacing to I examtnation i / Amphibole layer Une repeat distance (Q.SSnm).

EOS spectrum conforming to laboratory Identification criteria observed. AMPHIBOLES Ambiguous Fs Single Fiber (1-3 interaectioni = 1-3 fibers) Amosite 3= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>0 intersectiona) ______________ 2Smm filter • Crocidolite ! Non-asbestosI M.tn, ,----------- ‘ 3l»pp,n, Bui..: — I Anthophyllite ■ NSD= Mo Slructure. I >*'> ’^0.0. nr in l.l 4 G.O. | Tremolite ! .. . , , I Actinolite j ■'(on-identified L;\DATA\PR!VATE\iIIKSC\CA0D'^EM3 Q/22/9e

CITY_21MC100_002849274

NYC-WTC_000209916