TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters 1: 1944 Lab Group #: 5891 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type | Length ID of Structure N or V EDS No (Nonadb F B C M >=5iJ Chrys Amphibole Nonasfa Amblg/ND No Coord <5p Elements)

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pn 1 i I I I i i I 1 i ! i

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Struct = > O.op _> 5:1 Aspect Ratio Grid acceptance; 9= 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% 9= EDS spectrum conforming to laboratory holes or opaque areas ______ P i: M >5u ' identification criteria observed Chrysotile AMPHIBOLES Amphibole [ F = Single Fiber Amosite ! B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous j C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite i M = Matrix Actinolite Non-Identified ! N3D = No Structures Detected .-X.

CITY_21MC1OO_OO31O6427

NYC-WTC_000185349