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 Lab Group #: 7503 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm-

GRID BOX: /<«i Magnification: 20,000 GRID ID: /MV Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/22/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS i {Nonadb No F B C >=05 p Chrys Amphibole Nonasb Ambig/ND Elements) ) /? Coord <5p

.V 35 5 -7 4

1 rq Struct > ) 5u > 5; I A.spect Ratio Gnd acceptance; V = Positive diffraction pattern properties conforming to <5^ Stic vec filter, ovedapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped gnd squares <5% f F ! B ! C I M ! >5u \ = EDS spectrum conforrninc to laboratory holes or opaque areas (, identification criteria observed Chrysotile ■AMPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bunale i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster f>3 Intersections; Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03471222 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177031