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NYC-WTC_000229835

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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7636 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 5/4/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nory EDS No (Nonadb F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND /ri No Coord <5p Elements)

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Struct = > O.Sp > 5; I Aspect Ratio Grid acceptance: 7 = Positive diffraction pattern properties conforming to <50% undissolued filter, overlapped or folded Totals laboratory identification criteria observed <10% parlicuiale coverage >50% coverage ate least 20 unfolded or ovedapped grid squares <5% F B C M >5u '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHtBOLES Amphibole F = Single Fiber Amosite B = Bundle |<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3388387 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229835

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NYC-WTC_000229835Source: NYC Law Department, mirrored locally

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TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC-WTC_000180866

Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on February 1, 2002.

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