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TEM asbestos air sample results, NYC BOE, Jan 2002

Machine-extracted title · confidence 95%

Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities in January 2002.

NYC-WTC_000174758
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Scanned page image, NYC-WTC_000174758
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClientNam^ NYC BOE Volume (liters): 1810 Lab Group #: 6375 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0,04496 mm"

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/19/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p OhnA i Amphibole \ Nonasb Ambig/ND Nc Coorci <5p Elamsnts)

Ka”

Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance; V = Positive diffraction pattern properties conforming to undissoked filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate leas; 20 unfolded or overlapped grid squares <5% f F B C M >5p /= EOS spectrum conforming to laboratory holes or opaoue areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Smote Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = iviatrix Non-Identified Actinolite NSD = Nc Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660175

NYC-WTC_000174758

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NYC-WTC_000174758Source: NYC Law Department, mirrored locally

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