Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

' ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP 5 5'6a - 101 25/nl I Lab Sample No, 62132 Filter Type MCE 25 mm 3per3 toC GL-_ _

Client Spl. No. 26 Filter Area 325 mm'2

Instrument :.C. EM 10 C3% Grid I.C. Ds(' Nc.

Screen Magnification 16,4003 (GO) Area 0.'21124 mm'_ Comments Acc. Voltage 90 kV No. GO to be Analyzed 6 4 . -- Stru- _ _ _-sc =

GO. Structure Structure Type Length LD. of Structure N EDS or,/ I No Coord. No. .s um (No ment F B CM < 5um > 5um Chr ys.~ Amphibole p Nonasb. IAmbi g./ND Elements

x —rte yr' J 0'

I

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I L Phato No. (from 1 in 5 asbestos- Identify all structures uain EDS Check diffraction for asbestos Store all unrepeated apectraJ containing samples) 1 accptncci structures up to 70e ilitm (let 4) I Struct. = > O.Sum k > 5:1 Aspect Ratio <50S undiaaolve t er, overappe ar o e <1011 particulate coverage >50% coverage `1'Ot.$1S N= Not Observed (20$ spectrum or diffraction pattern) least 20 unfolded or overlapped grid squares <5% holes or opaque areas F n L. In ouut Positive diffraction pattern properties conforming to laboratory Identification criteria observed. Unused portion I i I For ehryaotile: 0.73cm ■pactnt for (020) reflections. of filter Chrysotile 0.03nm spacing for the layer line repeat. streaking Avoided portion of (110) and (170) reflections. of filter For amphiboles: 0.53nm layer line repeat. and appros. Portion of filter (2mm aide) 3.5 ratio of non-twinned layer line spot spacing to sunleot to Amphibole layer line repeat distance (0.57nm). e:ammation

1/ EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 Intersections = 1-3 fibers) Amosite a= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non —asbestos c= Cluster (>3 intersections) Matrix gbPPtns Rnle.: Anthophyllite NSDa No NoStructures Detected '~ >50 t/C.O. or in tat 4 C.O. T remolit e Non —Identified Ito Actinolite L•\DATA\PRIVATE\MI2BC\CADDtM3 0/22/90

NYC-WTC 000104293