NYC-WTC_000202627

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS L.AB GROUP tt: 5b5U - IQHju

Lab Sample Ko ^Q7Ci? Filter '-ype ycE 2S Tim Cpevacov Client Spl. Me. MSHS-3>n-10/'?-i Filter Area 3 8 5 mtn * 2 Instrument 5M IC CRX Grid I.D. •-/Vcf Disk. Ko. Screen Macnificacion 1^5, 4 OOX iGO) Arsa . 0.91124 mm"2 Commer.cs Acc. Voltage 30 kV No GO Co be Analysed 4 f 3.14? Struct. Corspd- to 7C s/mm-Z.;

GO. Structure structure Type Length I.D. of Structure EDS ^0.5 um (Nonasb. No, Coord. No. F B C M Sum Chrys. Amphibole Nonaab. AmbigYNb Elements) < fi nm

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Uphold No. (from I in 5 aabeatoa- Identify all atructurea uain< BPS Check diffraction for aabeatoa Lore ail unrepeated spectra eontaining samples) Grid accepLance:! ______ atnieturea up to 70a/^n (nt 4) <30% undiaaalved filter, overlapped or folded Struct = > O.Sum i > 5:1 Aspect Ratio <10% particulate coverage >S0% coverage Ns Not Observed (BD9 spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquaree Totals. yZs Poaitiva diffraction pattern properties canfarming F B C M > Sum to laboratory Identification criteria observed. ■UnuMd pardOD Fer ehrysoUlas 0.73niB spaeinc for (080) refloeUona. O-SSnra apscinc for the layer line repeat. streaKlnc «r niter Chrysotile □f (110) and (130) renecUona. ______ portion at niter For amphibalaa: d.Mam layer line repeat, and approx., PorUrni of nilar (Zmm Vido) 3,5 ratio of nan-twinned layer tine spot apaclna tn । ■uhjMtJo Amphibole layer line repeat distance (O.S3nm). SDS ipectrum oonfarmlng to laboratory Ambiguous IdenUficaUon criteria obaerwed. AMPHIBOLES Fs Single Fiber (1-3 intersecUons = 1-3 fibers) Amosite Bs Bundle (>3 Gben <1 fiber diameter apart) C= Clustar {>a intarMcUonal Simin fillar Crocidolite Non-asbestos I--------- 1 supping Rules: l____ Anthophyllite Ms Matrix NSD= No Structure! Detected >80 a/C.O. or in 1st 4 C.O. Tremolite Non-IdEulified Ls\BATA\P WVATE\ MIKSC'xCADD'TBM3 a/22/OB Actinolite

CITY_21MC100_003274229

NYC-WTC_000202635