TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

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TEM Asbestos (air ) Count Sheet Client Name: m’C BOE Volume (liters): ! 800 Lab Group #: 6856 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 22 Area Examined: 0.04496 mm-

GRID BOX: > Magnification: 20.000 GRID ID: o .Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2,27/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb | Ambig/ND No Coord Elementsi <5p I

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Struct = > 0.5(.i >5:1 Aspect Ratio Grid acceptance:

v/= Positive diffraction partem properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unloidec or overlapped grid squares <5% F B C i M >5p G EDS spectrum conforming to laboratory holes or opaque areas ide.ntification criteria observed Clirysotile i AMPHIBOLES Amphibole r = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) M = Matrix Anthophyllite Tremolite Actinolite - Non-Asbestos Non-Identified ri NSD = No Structures Detected

CITY_21MC100_003103605

NYC-WTC_000183964