TEM asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7558 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm^ GRID BOX: (OJA. Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/28/02 Analysis Performed By: Ry/

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS i No (Nonadb J F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND No Coord Loord <5u Elements) i

L

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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 overtapped grid squares <5% F B C M v': EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile 'amphiboles ' Amphibole E = Single Fiber Amosite B = Bunole (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = Mo Structures Detected

CONFIDENTIAL, CITY_21MC100_003471321 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177100