Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS A_c 3F.C1. 5 -_ _ 1 7 26 ): N Lab Sample No. 62594

Client Spl. No. 30 F:.__ _ _ Area . ? rm 2

Instrument I.D. EM 10 CRX Grid~:.D- Disk No. Screen Magnification !6,400X (GCi Area ! 3124 mr'_ Commencz Acc. Voltage 80 kV No. GC to be Ana'_ -cad 4 721 S_r'ect __rsed. _

t GO. No Coord. Structure Structure Type No. F B C IM >0,5 m u 5 um I Length >. 5um Chrys,j Amphibole I.D. of Structure N or/

Nonasb. Ambig./NDI Elements EDS (Nonasb ,

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Photo No. (from 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra J containing samples) Grid acceptance: structures u Lo 70e item (let 4) I Struct, _ > D,Sum &> 5:1 Aspect Ratio [ <50% nd olvakr overiaPror_riBI_1e <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern)lat least 20 unfolded or overlapped grid squares <5% holes or opaque arses Positive diffraction pattern properties conforming to laboratory identification criteria Unused portion For etirysoUle: 0.77nm s Bing for (020) resections, ti of filter Ch ryso tile 0.SDem spacing for the lacer line repeat. streaking Avoided portion of (110) and (130) resections. of filler observed.CftrUon Per sesplubale : 0.53am layer line repeat, and approx. er (2mm etde) 0.3r►tio of non-tinned layer tine Spot spacing to Amphibole layer line repeatdistance (0.33nm). j

= EDS spectrum conforming to laboratory AMPHIBOLES Ambiguous identification criteria observed. F= Single Fiber (1-3 Intersections = 1-3 fibers) Amosite Ha Hurdle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 25min inter Craeidalite Non —asbestos ~-_stopping Rules: Anthophyllite Ma Matrix NSDa No Structures Detected >3o s/G.0. or in fat 4 C.O. Tremolite Actinolite Non —Identified 1~\DATA\PRXVATE\MIKEG\CADD\T'EMO 9/22/98

NYC-WTC 000104408