TEM Asbestos air sample results, WC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: WC BOE Volume (liters): 1928 Lab Group #: 6052 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 rarr* GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/6/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS No (hionado- ■ F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5(j . Elements)

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_______ I I

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: \/= 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% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria 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_21MC1OO_OO3467384 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT, 2008

NYC-WTC_000180692