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TEM Asbestos air sample results, NYC BOE, Nov 2001

Machine-extracted title · confidence 95%

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

NYC-WTC_000179202
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Scanned page image, NYC-WTC_000179202
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 5975 Filter Type / Filter Area: MCE 385 Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/27/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No Coord No r B c M >=05 pi <5u '=5m Chrys Amphibole Nonasb Ambig/ND Elements)

/ “7 3LV2' // /I

III Struct = > 0.5u >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laDoratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% B C M i >5u 7= EDS spectrum conforming to laboratory I identification criteria observed holes or opaque areas Chrvsotile -t- i .AMPHIBOLES ■ Amphibole F = Single Fiber i Amosite i B = Bundle (<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous C = Bluster (>3 intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identifiea Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458448 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179202

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NYC-WTC_000179202Source: NYC Law Department, mirrored locally

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