Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAE GROUP 4 : 5' 9: -

Lab Samp~e Nc 52569 F:.1cer Tvc MCE 2: mm Operator Client Dpi. No. 04 .-_:er Area 395 mm -- Instrument 1.0. EM 10 C X Grrd 0.D. 1' :S Disk No. Screen Magnification 16.400X (G0; Area 0.01:24 mm-2 Comments Ace. Voltage 80 kV Mo. GO to be Analyzed 4. ..) Struct Corsvd. :o amm"

GO. Structure Structure Type Length I.D. of Structure N or,/ EDS 0.5 um (Nonasb. No Coord. No. F B C MI < 5 Sum Chrys.; Amphibole Nonasb. IAfnbig./NDI Elements

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w Photo No. (from 1 in 5 asbestos- containing samples) Struct. = > 0.5um & > 5:1 Aspect Ratio Identify all structures using EDS l <50% ac ptan undia.oive 1 t er, Check diffraction for asbestos structures up to 70s iltm (let 4) over apps <10% particulate coverage >50% coverage N= Not Observed (ED5 spectrum or diffraction pattern) at least 20 unfolded or overlapped grid square. r o e Store all unrepeated spectra

Totals

I Positive diffraction pattern properties conforming <5% holes or o a ue areas to laboratory identification criteria observed. Unused portion For chryaotlla: 2.79m spacing for (020) reflections, at titter Chrysotile 0.39nm spacing for Ike layer line repeat, streaking Avoided pardon of (110) and (190) reflections. of filter For a m phibelm: 0A3nm layer line repeat. and approx. Partion of (liter (2mm vide 3.3 ratio of non-t..tnned layer line spot spacing m .ubieet to saammatiun l Amphibole layer line repeat distance (0.3anm1. EDS spectrum conforming to laboratory ~ Ambiguous Identification criteria observed. AMPHIBOLES h I F= Single Fiber (1-3 Intersections = 1-3 fibers) Amosite B= Bundle ((>3 fiber. <1 fiber diameter apart) 25mm filter Crocidolite I Non —asbestos C= Cluster (>3 intersections) ~ Stopping awe,: I Anihophyllite M= Matrix N50= No Structures Detected >50 a/G.O. or in lot 4 G.O. Tremolite Non —Identified Actinolite I t:\DATA\PRIVATE\x tggc\uDD xa s /zz/se

NYC-WTC 000104383