TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE V'olume filters'): 1816 Lab Group #: 6765 Filter Tvpe / Filter .Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/21/02

.Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure T ype Length ID of Structure N or EDS No >=05 (J ;>=5p (Nonadb F B C M Chrys Amphibole Nonasb Ambig/ND Elements)- I No Xoord <5|J

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I i Struct = > 0.5 u > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or raided Totals laboratory identification criteria observed <10% particulaie coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% j F j B I C i M p5u '1- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES .Amphibole i F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i r - C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j i 1 Tremolite M = Matrix Non-Idenuned j Actinolite NSD = No Structures Detected

CITY_21MC100_0 03103366

NYC-WTC_000183841