NYC-WTC_000220696

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1880 Lab Group #: 7285 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: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/31/02

■Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 'T EDS No (Nonadb F B C M >=05 p >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) /

Struct = > ().5p >5:1 Aspect Ratio Grid acceptance: N= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laooratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5li EDS spectrum conforming to laboratory holes or opaque areas Identification cnteria ooserved Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle '<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = .Matrix Non-ldentified Actinolite NSD = No Structures Detected

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