TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 8294 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/26/02

Analysis Performed By: __________ fL/_____ ROMAN 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 Elements) No Coord <5m

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Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: '1 = Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulafe coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >C> t/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identifieri NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003461843 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179947