TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NT^C BOE Volume /liters): 1824 Lab Group #: 6600 Filter Tvpe / Filter Area: MCE 3S5 mm- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/8/02

Analysis Performed By: MARK PEYSAKHOV

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

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Struct = > 0.5,u -> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filler, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% f I F i B j C I M I >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j ! i amphiboles' Amphibole ; ----- r F = Single Fiber Amosite i 3 = Sundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ! C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos ' Tremolite M = Matrix i Non-Identified I Actinolite NSD = No Structures Detected

CITY_21MC100_003103051

NYC-WTC_000183734