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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 by the NYC Board of Education on November 25, 2001.

NYC-WTC_000185496
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Nan NYC BOE Volume (liters): 1944 Lab Gi Dll! 5970 Filter Tvpe ' Filter Area: MCE 385 mm" Lab Samp Grid Opening Size: 0.01124 Client Sam c #: Area Examined: 0,04496 mm" GRLD BO? > yy Magni tication: 20,000 GRID ID: AAyA Accelerating Voltage: 100 KeV # Grid Opr lings: 4 Analysis Date: 11/25/01

Analysis Pertormed By: / ROMAN PEYSAKHOV

GO. Structure Structure Type i Length ID of Structure N or EDS ''' (Nonadb । No C M i >=05 p i >=5p Chrys Amphibole j Nonasb Amdig/ND N" <5u Elements) i

13^

li //S

I LJ I J

Struct = 0.5 5:1 Aspect Ratio Grid acceptance:

'/= Positive diffrs' ri pattern properties conforming to <50% undissolved filter overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identifi., ■on catena observed least 20 unfolded or overlapped grid squares <5% B C M >5u S= EDS specruh .cntorming to laboratory holes or opaque areas identification critei juserved Chrysotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle !<3 fii '1 fiber diameter apart Crocidolite j Ambiguous C = Cluster (>3 II > sections) Anthophyllite j Non-Asbestos M = Matrix Tremolite Actinolite I Non-Identif'ied NSD = No Strucii! -"i, Detecteo J..

CITY_21MC100_011107810

NYC-WTC_000185496

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NYC-WTC_000185496Source: NYC Law Department, mirrored locally

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