TEM asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

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TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 LalLGrou£^ 7540 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 09 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Acceleratins Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/27/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Amblg/ND No Coord <5m Elements) ----- - i

Struct = > 0.5p > 5:'. A.spect Ratio Grid acceptance;

\= Positive diffraction panem properties confcrming to <50% undissolved filter, overlapped or folded Totals laboratory eentificatior criteria observed <10% particulate coverage >50% coverage ate least 20 urfolded or overlapped grid squares <5% j F B C M I >5u 7= EDS spectrum conforming to laboratory holes or opaque areas p identification criteria observed Chrysotile AMPHIBOLES Amphibole 1 F = Single Fber Amosite B = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersecticnsi Anthophyllite Non-Asbestos ' Tremolite M = Matrix Non-Identified NSD = No Structures Detected Actinolite 1 . i

CONFIDENTIAL, CITY_21MC100_003471301 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177085