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TEM Asbestos air sample results, NYC BOE, Feb 2002

Machine-extracted title · confidence 50%

Laboratory report documenting transmission electron microscopy analysis of an air sample collected by the NYC Board of Education in February 2002.

NYC-WTC_000185685
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Scanned page image, NYC-WTC_000185685
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6841 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #:- 02 Area Examined: 0.04496 mm- GRID BOX: Magnification: pg qqq GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/27/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND Elements) No , Coord <5p pg"

Struct = > O.Sp. > 5;! Aspect Ratio Grid acceptance: ^-Positive diffraction pattern properties conforming to Totals laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p ■/= EDS spectrum conforming to laboratory holes or opaque areas 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 Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003108309

NYC-WTC_000185685

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NYC-WTC_000185685Source: NYC Law Department, mirrored locally

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