NYC-WTC_000200213

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS lAB GROUP tf: 55^8 09/28/01 Lab Sample No, 59726 Filter Type MC5 2S mm Operator Client 3pl. No. Filter Area 385 mm Instniraenc I.D. 3M 10 Grid I.D. Disk Nc. Screen Magnizici ;icn 15.40OX (GO) Arsa 0.01124 mm"? Gommencs .2^cc. Voltage 30 kV No. GO to be Anal'/’zsd 4 (3;147StrucC:Cors2d^iC 20s/2«n*2^

GO. Structure Length I.D. of Structure EDS >Q,5 um (Nonasb. No. Coord. No. F B C M Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)

y0 < 5 um

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fl

C Photo No. (from I in S ajbcatoi- Lore al] unrepeated spectra—^ Identify all atructuree uaing KPS Check diffraction tor aibeatoa containing aamples) Grid acceptanceTl a true tu res up to TOa/^n (l»l 4) <50X undiasotvea fiiter, overlapped or folded Struct = > Q.Sum k > 5:1 Aspect Ratio <IOX particulate coverage >50X coverage Ns Not Obaerved (SOS spectrum or diffraction pattern) at leaat 20 unfolded or overlapped grid squares Totals <SX holes or opaque areas PostUve diffraeUon pattern properUea eonformtnt F B C M > Sum to laboratory idantiftcaUon criteria obaenred. UnuBod portion Far chryaatila: O.TSnni spacitic for (020) ranactiona, of niter Chrysotile O.a3nRi apaelna for Cha layer line repeat, alreakinc of (no) and (130) raneedona. Avoidad portion PirUon or nitor ar niter Por O.SDntn loyor Uno repnoL, and approx. (Zmm wide) 3,9 ratio of non—twinned layer Una spot spacins to ■ubject to •xamiBalian Amphibole layer Una mpaat diatenca (0.9anin). EDS apactrum confomin< te laboratory IdeaUfioatlon erliena obaerved. AMPHIBOLES Ambiguous Fw Single Fiber (1-3 InteraccUana = 1-3 flbera) Amosite Sss Bundle (>3 flben <1 fiber diameter apart) ________________ 25mm niUr Non—asbestos Crocidolite NSD= No SUuctum OotocLod I|— >°° ‘° . *I— I °-°- | Anthophyllite Tremolite Actinolite Non-Wentified t:\DATA\PWVATE\llIlaC\CADD\rilla 0/22/0B

CITY_21MC100_003267074

NYC-WTC_000200213