NYC-WTC_000178972

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC.BOE Volume (liters): 1840 Lab Groan 7987 Filter Type / Filter Area: MCE 385 mm’ Lab Sample#; 14 Grid Opening Size: 0.01124 Client Sample#: 17 Area Examined: 0.04496 mm’ GRID BOX; Magnification: 20 000 GRID IP; Accelerating Voltage; 100 KeV # Grid Openings: 4 Analysis Date: 6/6/02

Analysis Performed By: MARK PEYSAKHOV

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

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Struct = >0.5(1 > 5;1 Aspect Ratio Grid acceptanes: V= Positive diffraction pattern properties conforming to <50% undissotved filter, overlapped or folded Tot^ laboratory identification criteria observed <10% parilculatB coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p i/= EDS spectrum conforming Io laboratory holes or opaque arem identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3lnleiseclions) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite • Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003456516

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178985