TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Voinme (liters): 1944 Lab Group #: 5891 Filter Type Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11C5/01

Analysis Performed By: ROVAN PEYSAKHOV

GO. Structure Structure Type [ Length ID of Structure N or V EDS (Nonadb No F B C I M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5u Eiements)

J ^21 Ie Zz // 1 ! 2/ j ri i

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I i Struct = >0.5n,> 5:1 Aspect Ratio Grid acceptance: n'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laporatory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% I F B j C M >5p- N= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chry'sotile AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Bundle {<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ! C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Non-Identified i Actinolite NSD = No Structures Delected

CITY_21MC100_003106428 NYC-WTC_000185350