TEM Asbestos air sample results, WC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos ( air) Count Sheet Client Name: WC BOE Volume (liters): 1952 Lab Group #: 5891 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or -i EDS Nonasb (Nonadb No F B C M I >=5(j Chrys Amphibole Amoig/ND No Coord <5u I Elements) I

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I I I I Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance; 9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

'■1 = EDS spectrum conforming to laboratory least 20 unfolded or overlapped gnd squares <5% jF B I C j M >5p holes or opaque areas identification criteria observed Chrysotile j AMPHIBOLES Amphibole I i I F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ! r C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified j NSD = No Structures Detected Actinolite i j I I

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