NYC-WTC_000229394

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volame (liters): 1824 Lab Group #: 8278 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 0,04496 mm"

GRO) BOX: Magnificatiop: 20 000 GRWn?: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 6/25/02

Analysis Performed By: MARK PEYSAKHOV

GO. SUucture Structure Type Length to of Structure N or V EDS No (Nwiadb F S C M >=05 p Chrys Amphibole Nonasb AmbigiNO No Coord <5p Eiemenls)

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Struct = > 0.S|i > 5:1 Aspect Ratio Gr« acceptance: i/= FositlvB diffraction pattern properties conforming to <50% uttoissoNed IMer. overlapped or folded Totals laboratory identificatton criteiia observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u -/= EDS spectrum conforming to iaboratory holes or opaque areas identrficatton criteria observed Chrysotile AMPHIBOLES Amphiboic F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-ldentified NSD = No Structures Detected

CITY_2lMC100_000492095 NYC-WTC_000229394