NYC-WTC_000218757

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7045 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/12/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorV EDS No (Nonadb F B C M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND No I Coord <5m Elements)

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ^/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >/= EDS spectrum confonning to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = 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_000466870 NYC-WTC_000218771