NYC-WTC_000196963

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 6942 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 06 Area Examined: 0.04496 mm- .

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/6/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID cf structure N or N EDS {Nonadb I No F B C M >=05 |j >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

_______ I_______ ____ )__ Struct = > O.5|J > 5:1 Aspect Ratio Grid acceptance:

'J = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% r F B i C ! M i >5m \= EDS spectrum conforming to laboratory holes or opaque areas ideniificafion criteria observed Chrvsotile i -1— .AMPHIBOLES ■Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite .Ambiguous C = Cluster (>3 Intersectionsi Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite 1 Non-Identified I NSD = No Structures Detected

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NYC-WTC_000196963