TEM Asbestos air sample results, WC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1952 Lab Group 6121 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: / Grid Opening Size: 0.01124 Client Sample #: 7 Area Examined: 0,04496 mm-

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/17/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure M or 7 EDS No (Nonadb F B C M TTflsE Chrys Amphibole Nonasb Ambig/ND No ^oord <5|j Eements)

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1 I

Struct = > 0.5n > 5 I Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% unbissoived filter, overlapped or folded Tot^ laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B i C M i >5u 7= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria ooserved Chrysotile AMPHIBOLES Amphibole r Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersectansj Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected _L..

CITY_21MC100_003104844

NYC-WTC_000184247