TEM asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

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TEM Asbestos fair).Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6409 Filter Type / Filter Area: MCE 385 mrn^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 01 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date; 1/23/02 -

Analysis Performed By: 1 MARK PEYSAKHOV

GO.; Structure structure Type Length ID of structure Nor EDS (Nonadb No F B C. ■>=05 p ” ■ >=5|J Chrys Amphibole Nanasb Ambig/ND No Coord Elements) <5p

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Strnet = > 0.5p _> 5.T Asoect Ratio Grid acceptance: y/= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapoed or folded Totals laboratory identification criteria observed < 10% oaPiiculate coverage >50% coverage ate least 20 ■unfolded or overlapped grid squares <5% B C M >5p '/= 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 ciameter apart Crocidolite 1 Ambiguous C = Cluster bS-lnterseclions) Anthophyllite i Non-Asbestos ■Tremolite W = Matrix Actinolite 1 Non-Ideatified NSD = No Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660204

NYC-WTC_000174772