Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP 5639 - 10/08/01

Lab Sample No. 6U566 Filcer Type MCE 25 nun Operator Client Spl. No. WSKA-EB&R-1O/6-01 Filter Area 385 min"2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Maanificacion 16,400X (GO) Area 0.01124 mm"2 Comments Acc. Voltage 8 0 kV No. GO to be Analyzed _4 ( 3.147 Struct. Corspd. to 70 5/mm"2.)

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

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Store all unrepeated spectra-^ Photo No. (from 1 In 5 as »estoa- Identify all structures using BDS Check diffraction for asbestos containing samples) fCrl^^cceptancen structures up to 708/&m (l»t 4) <S0X undlBaolveilrITCr7T^erlappe?ai^oT3ea^^ Struck = > O.Sum & > 5:1 Aspect Ratio <1QX particulate coverage >50X coverage Ns Not Observed (BDS spectrum or dlffrseUon pattern) at least ZO unfolded or overlapped (rid squares Totals Positive diffraction pattern properties conforminc <SX holes or opaque areas F B C M > Sum to laboratory identification criteria observed. 'Unused portion For chrysotile: 0.73nm spaeiox for (OZO) ronectloos, of niter 0.&3nm ipecinc for the layer line repeat, atreaklnc Chrysotile of (110} and (130) reneotions. -Avoided portion of niter For amphiboles: 0.33nm layer line repeal, and approx. PorUon of niter (2mm wide) 3.S retie of noa-tvianed layer line vpat apaeina to subject to eismlnsUBO Amphibole layer Une repeat distance (O.ftaafn). EDS spectrum eeafermin< to laboratory IdenUheatlon criteria observed. AMPHIBOLES Ambiguous Fs Single Fiber (1-3 IntersecUona = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) ZSmm niLar Crocidolite Non-asbestos Cs Cluster (>3 Intersections) . .1 Stopping Rules: I , . He Ustrix Anthophyllite NSD= No Strueturss Detected ->30 s/C.O. or la 1st 4 C.O. Tremolite Actinolite Non-ldentified L\ 1>ATA\PIUVATE\MIKBC\CADOVSU3 B/22/88

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