TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1836 Lab Group #: 6585 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm- GRID BOX: all Magnification: 20,000 GRID ID : /C2^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/7/02 Analysis Performed By: /

ROMAN PEYSAKHOV

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

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Struct = > 0.5)1 ,> 5:1 Aspect Ratio Grid acceptance: x/= 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 overapped grid squares <5% F B C M >5u V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile : AMPHIBOLES Amphibole F = Sing® Fiber : Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

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NYC-WTC_000183727