TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8759 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0 04496 mm^

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Perlormed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 'Z EDS No (Nonadb F B C M >=05 u > = 5)3 Chrys Amphibole Nonasb Ambig/ND ____ No Coord <5m Elements)

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/IS J 4 I

Stiuct = > 0 5p >5 I Aspect Ratio Grid acceptance \/= Positive diffraction pattern properties conforming to <50% uncisEGived filter, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B I C M >5u A- EDS spectrum conforming to laboratory holes or opaque areas identificabon critena 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 Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431226 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175485