TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 5891 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 20 Grid Opening Size: 0.01124 Client Sample #: 20 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor \ EDS (Nonadb No F B i C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/ND No Coorc <5p Elements)

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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 <10% parrcuiate coverage >50% coverage ate laboratory identification criteria ooserved N= EDS spectrum conforming to laboratory least 20 unfolded or overiapped grid squares <5% p B C M >5u holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES : Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster (>3 intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Nou-Identified i Actinolite NSD = No Structures Detected ! 1 .L

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NYC-WTC_000185355