TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters'): 1824 Lab Group #: 6788 Filter Tvpe / Filter .Area: MCE 3S5 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/23/02

Analysis Performed By: MARKPEYSAKHOV

GO. Structure Structure Type . Length ID of Structure N or EDS No >=0S|j : ‘=51-1 Amphibole (Nonadb F B C M Chrys Nonasb Ambig/ND No Coord <51J Elements)

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3

Struct = > 0.5u _> 5:1 Aspect Ratio Grid acceptance; Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification critena observed <10% paniculate coverage >50% coverage ate least 20 unfolded or ovenapped grid squares <5% F B i C I M i >5p V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amphiboles' Amphibole j F = Single Fiber Amosite 3 = Bundle (<2 fibers <1 fiber diameter apart Crocidolite Ambiguous | ■ C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite Ivt = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003103412

NYC-WTC_000183856