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): 1936 Lab Group #: 6197 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Size: 0,01124 Client Sample #: 1 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12,/24/01

Analysis Performed By; MARK PEYSAKHOV

30. I Structure Structure Type Length ID ol Structure N or 7 EDS No >=05 pi I >=5|j (Nonadb F B 2 M Chrys Amphibole Nonasb Ambig/ND No Coord <5|J Elements) I

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% partculate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5p \'= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chiy'sotile I AMPHIBOLE^ Amphibole F = Single Fiber 1 Amosite j B = Bundle {<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous ! Anthophyllite C = Cluster (>3 Intersections) Non-Asbestos । ' Tremolite , M = Matnx Non-Identified । NSD = No Structures Detected Actinolite _______________ J 1

CITY_21MC100_003105079

NYC-WTC_000184413