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TEM Asbestos air sample results, OTC BOE, Dec 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_000184162
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Scanned page image, NYC-WTC_000184162
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OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: OTC BOE Volnme (liters): 1928 Lab Group #: 6080 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 18 Grid Opening Size: 0.01124

Client Sample #: 18 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: iOO KeV # Grid Openings: 4 Analysis Date: 12/12/01

Analysis Performed By; MARK PEYSAKHOV

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

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Struct = > 0.5p >51 Aspect Ratio Grid acceptance: 7= Positive diffracbon pattern properties conforming to undissoived fitter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5u 7= EDS spectrum conforming to laboratory holes or opaque areas identilication critena observed Chrvsotile 1 I AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = C uster (>3 Intersections) ' Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Defecteo

CITY_21MC100_003104710

NYC-WTC_000184162

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NYC-WTC_000184162Source: NYC Law Department, mirrored locally

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