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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_000183776
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NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE yolume_Qiters)2 ISOS Lab Croup #: 6674 Filter Tvpe / Filter -Area: MCE 385 mm- Lab Sample #: 18 Grid Opening Size: 0.01124 Client Sample#: 18 Area Examined: 0.04496 mra- GRID BOX: Magnification: 20.000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/14/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb -F B C M >=05 p •=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

3

! I Struct = >0.5u >5:1 Aspect Ratio Grio acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or toided Totals laboratory identification criteria observed <10% parbculate coverage ’50% coverage ate leas; 2C unfolded orovenapped grid sauares <5% I F I B I C i M p5u V= EDS spectrum oonforming to laboratory holes or opaque areas identification criteria observec Chrysotile i AMPHIBOLES Amphibole ■ = Single ribsr Amosite E = Eundie (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 5 C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified i Actinolite NSD = No Siructures Detected

CITY_21MC1OO_OO31O32O7

NYC-WTC_000183776

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NYC-WTC_000183776Source: NYC Law Department, mirrored locally

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