NYC-WTC_000224261

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (lifers): 1920 Lab Group #: 7477 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Staicture Type Length ID of Structure Norv EDS No (Nonadb F B C M >=05 (J >=5|j Chrys Amphibole Non ash Ambig/ND No Coord <5m Elements)

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Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to ^^0% undissolved filter, overiapped or folded Totals laboratory identification criteria observed * 10% particulale coverage >50% coverage ate least 20 unfolded or overiapped gnd squares <5% F B C M. >5m 'J- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES : Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections; Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002892881

NYC-WTC_000224261