Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS Lab Sarnc - e Nc 5''- - - Filte_ •• e MC T•: _= mm - Opr--- Client Spl. No File_. Area 3Enrn _

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GO. iStructure Structure Type Length I.D. of Structure EDS N or s/ ,0 .5 um (Nonasb. I Nod Coord. No. F B C M < um > 5um 'Chrys.; Amphibole Nonasb. IAmbig./ND; Elements)'

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Photo Na. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeaLed spectra containing samples) Grld acceptance: structures up to 70e t31m (let 4) Struct. _ 0.5um & > 5:1 Aspect Ratio ,,0% undiesolve t er, aver app. or o e <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or dlffncuon pattern) let least 2D unfolded or overlapped grid squares Positive diffraction pattern properties <5% holes or e a Ue areas conforming to laboratory identification criteria observed. Unused portion For chryaaUla: O.79nm spacing for (020) ranecUons. of (liter Ch ryso tile O.SOnm spacing for the layer line repeal. streaking Molded portion of (110) and (100) refleeUons. f filter For ompbiboles: O.SOnm layer line repass and apprea. ) Portion of niter (2mm _.de 7.5 ratio at non-twinned layer line spot spacing to subject la eaammation ~' 1 Amphibole layer line repeat distance (0.52nm). 1 i

EDS spectrum tr conforming to laboratory / identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections a 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non —asbestos cc Cluster ' Stepping Rules:__ M= (>O intenectiena) Anthophyllite NSDo Na Structures Detected >50 s/ C.O. or in let 4 C.O. Trernolite Actinolite Non—Identified L•\DATA\PRIVATE\KIKEC\GDD\TEli3 9/22/98

NYC-WTC 000104389