TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client iSame: NYC BOE Volume (liters): 1816 Lab Group #: 6943 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 20 Area Examined: 0,04496 mm=

GRID BOX: Magnification: 20,000 GRID ID: /3 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS i No ?. ) -5p (Nonadb F B M Chrys Amphibole Nonasb , Ambig/ND No Coord <5p Elements)

I

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r- i

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Struct = > O.opt >5:1 Aspect Ratio Grid acceptance:

v = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% i F ) B j C ! M I >K 3= EDS spectrum conforming to aconmcrv holes or opaque areas Identification criteria observed Clirvsotiie AMPHIBOLES -Amphibole F = SingiB Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambitiiious C = Cluster (>3 Intersectionsi Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Delected

CITY_21MC100_003102317

NYC-WTC_000183239