NYC-WTC_000229015

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1832 Lab Group #; 7826 Filter Type / Filter Area: MCE 385 mm" Lab Sample#: 9 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20.000 GRID ID. Accelerating Voltage: too KeV # Grid Openings; 4 Analysis Pate: 5/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS : (Nonadb j No F B C M >=05p T >=^ Chrys Amphibole Nonasb AmtsigjtJD No Coord Elements) I ______ ---------- i ---- -CL. ____ j

J i Struct =>0.5q >5:1 Aspect Ratio Grid acceptance: ■7= Positive diffraction pattern properties conforming to <50% undissalved filter, overiapped or folded Totals laboTEtory identificafion criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded of overiapped grid scuares <5% F B C M 7- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 libera <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophytiile Non-Asbestos Tremolite M = Matrix Actinolite Non-Identificd NSD = No Structures detected

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NYC-WTC_000229015