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TEM Asbestos air sample results, NYC BOE, Feb 2002

Machine-extracted title · confidence 95%

Laboratory report documenting transmission electron microscopy analysis of an air filter sample collected from a New York City Board of Education facility.

NYC-WTC_000183768
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NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE X'olume flitersi: iS16 Lab Group #: 6660 Filter Tvpe ' Filter Area: MCE 355 m Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm- GRID BOX: /7 Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/13/02

Analysis Performed By: ROIvLAN PEYSAKHOV

GO. Structure Structure lype Length ID of Structure N or A EDS No (Nonadb F B C i M >=05 p >=51J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

77^ Q 7

I' I Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped aria squares <5% B ! C i M I y- EDS spectrum conforming to laooratory holes or opaque areas identification criteria observed Chrysorile ) ! i ’ 1 AMPHIBOLES Amphibole i F = Single Fioer Amosite 5 = Sundie (<3 fibers <1 fiber diameter aoart Crocidolite Ambiguous ! C = Cluster [>3 intersections) Anthophyllite Non-Asbesros i Tremolite M = Matrix Non-Identined i NSD = No Structures Detected Actinolite I i CITY_21MC1OO_OO31O3176

NYC-WTC_000183768

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NYC-WTC_000183768Source: NYC Law Department, mirrored locally

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