NYC-WTC_000228177

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7159 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 2 Grid Opening Size: 0.01124

Client Sample #: 02 Area Examined: 0.04496 mm-

GRID BOX: Ma^nificatinn; 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length lO of Structure N or v EDS No (Nonadb F B C M >=05 p >=5y Chrys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

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Struct = > 0.5g > 5; I Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissohred filter, overlap or folded Totals laboratory idendficaton criteria observed <10% parteulalB coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M i >5u \= EDS spectrum conforming to laboratory holes or opaque areas identrfication criteria observed Chrysotile 'amphiboles i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite j Non-Asbestos Tremolite M = Matrix Actinolite Non-ldentified NSO = No Structures Detected

CITY_21MC100_0 06617780 NYC-WTC_000228177