Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

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ATC ASSOCIATES INC. - TEM ANALYSIS ■ LAB GROUP # 5761 - Operator Filter Type MCE 25 mm Lab Sample No. 62197 ~ Filter Area 385 mm"2 Client Spl. No. 24 Disk No. Grid ID. Instrument I EM 10 CRX Comments (GO) Area 0.01124 mm 2 t0 70 s/mm~2.' Screen Magnification 16 400X t 4 721 Struct Corspd Analyzed 6 No. GO to be Acc. Voltage Bo kV EDS I.D. of Structure Nor✓ (Nonasb. Length g GO. Structure 8trticture Type Nonasb. Afnbig./ND Elements 0 5 um >. Sum Chr s. Amphibole No Coord. No. F H C M < s urn

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— M", ck uau Identify all structures usin B0s to 70~ I~im (let 4) No. (from 1 In 3 aabestw- structures P aon4lning samples) Grid <507L accept*aca: uadlasoive r, overlapped er o >50% coverage Ot ala Struct. _ > 0.5um & > 5:1 Aspect Ratio <10% particulate coverageoverlapped grid squares F C M diffraction pattern) at least 20 unfolded or B N= Not Observed (BOB ■PeCW1e or <5% holes or opaque areas Propsrues conforming pwluve diffraction pattern criteria Unuaad portion t~ to laboratory identification observed. of filter Chrysotile pent. s ~~ For obry■ouls: 0for eg ■br~•rlfn~ avofdad portion 0,53am ■pea(aI for the b or nwr of (110) and (t9o) nanaaumu. Portion et filter (2mm vide) Amphibole liee repeat. and apprex tion of to For ampbiboias 0.53nm layer tarir tine spot apaains 1 asamlwuea 3.5 ratio of aoa-tinned diataoa ( .53nm). layer line rapaat Ambiguous laboratory AMPffiHOLES l/ EDS .peotrum conforming to Identiftaatiea criteria observed. Amoslte F. single Fiber (1-3 intersecttoea - 1-3 fibers) 25mm filler Croeidolite N on —asbestos B= Bundle (>3 fibers <1 fiber diameter apart) Anthophyllite (>3 intersections) Stopping Rula■: C= Cluster >%n ric.o. or in let 4 CO Tremolite Non-identified NYC-WTC 000104207