TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1848 Lab Group #: 6908 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 24 Grid Opening Size: 0.01124

Client Sample #: ?7 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/3/02

Analysis Performed By: MARK PEYSAKHOV

GO. I Structure I Structure Type Length ID of Structure y or ■ : EDS No : =5j I Chrys Amphibole Nonasb Ambig/ND i TJonadb^ F B C i M No Coord <5|J Elements) 1

_ -———J

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Struct = > 0.5h >5:1 Aspect Ratio Grid acceptance:

\(= Positive diffraction pattern properties conforming to <50% undissolued filler, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed

'v= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas Tf ____________ __ B i C I M >5p

identification criteria observed Chrysotile .AMPHIBOLES 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

CITY_21MC100_0 03102265

NYC-WTC_000183216