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: 5770 - 10%26/01

L] Lao Sample No, 62559 Filter Type NCR 25 nm Operattr . L/

Client Spl No. H-5 Filter Area 3 8= mm

Instrument 1.D. EM 10 CRX Grid I.D Disk: Nc.

I Screen Magnificaoion 15,400E

Acc. Voltage 80 kV (GO) Area

No. GO oc be Anal.r=ed 0.01124 mm

4. Comments

S:r•ic` Ccsd -

GO. Structure Structure Type Length LD. of Structure EDS N or V/ (Nonasb. No Coord. No. F B C M -,O.5:: >. 5um Chrys. Amphibole Nonasb. Ambig./ND Elements 5

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Photo No. (from 1 in 5 asbestos- Identify all structures using E1 cnacic dufracuen for asbestos Store all unrepeated spectra containing samples) Grid acceptance: structures up to 70s/Arm (let 4) I Struct. = 0.5um & > 5:1 Aspect Ratio <50% undissolved tutor, avertoppea <10% particulate :overage >50% coverage or tetaeu i 1 1.alsTotals N- Not Observed (EDS spectrum or diffraction pattern) at beat 20 unfol ed or overlapped grid squares <5% holes or o r ue areas C M >- 5um Positive diffraction pattern properties conforming I F B to laboratory identification criteria observed. , —Unused portion For chrysotile: 0.77nm ■pacing for (020) reflections. of inter Chrysotile I 0.37am spacing tar the layer line repeal. streaking of (l to) and (170) reflections. Avoided portion of tiller Far amphlbales: 0.83nm layer line repeal, and appre.. I1~\Portion of filter subject m l (2mm .Ids) Amphibole j I 0.5 ratio of non-t.inaed layer line spot spacing to layer line repeat distance (O.23nm). saammatlon

EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite 3D Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>7 intersections) 23mm filter Crocidolite Non—asbestosi r~ Stopping Rules: L_..._, Anthophyllite Matrls NSD= No Structure. Detected I >e0 s/C_0. or to let 4 C.O. Tremolite Non —Identified I L•\DATA\PRIVATE\YIXEC\CAD0%77;k3 9/22/98 Actinolite

NYC-WTC 000104339