NYC-WTC_000228795

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7664 Filter Type / Filter Area: MCE 3 85 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 GRID BOX: Magnification: 20 000

GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/7/02

Analysis Performed By: MARK PEYSAKHOV

GO. Stajcture Structure T/pe Length ID of Structure N or V EDS (Nonadb No F B C M >=05 M >=5p Ctirys Anipfiibole Nonasb Ambig/ND No Coord <5p Etemenb)

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Struct = > 0.3n >5:1 Aspect Ratio Grid acceptance: r/= Posilive diffraction pattern propertes conforming to <50% ufxllasolwed nter, overlappad or folded Totals laboratory idensiteation onteriB observed <10% partfcuiatB covsrags >50% coverage ate least 20 unfokJed oroveilapped grid squares <5% F B C M >5m 1/= EOS spectrum wnforming to laboratory holes or opaque areas identilieation criteria observed Chrysotile AMPHIBOLES ‘ Amphibole F = Single Aber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ) Ambiguous C ’ Cluster t>3 Intersections) Anthophyllite Non-Asbestos Tremolite M ’Matrix AcSnolite Non-Identified NSO = No Slnrctures Detected

CITY_21MC100_002901709

NYC-WTC_000228795