TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

z TEM Asbestos (air) Count Sheet Client \ame: NYC BOE Volume (liters): 1936 Lab Group #: 5975 Filter Type / Filter Area: MCE 385 ram- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm* GRID BOX: Magnification: 20,000 GRIDED: ZSG_ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/27/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS (Nonadb No F B ' C M >=05 p Chrys Amphibole Nonasb .A.mbig/ND No Coord <5u Elements)

aXS u If

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: y - Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid sguares <5% F B C I M >311 EDS spectrum conforming to laboratory holes oropanue areas identification criteria observed Chrysotile ' AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified NSD = No Structures Detectea Actinolite I !

CITY_21MC100_003106755

NYC-WTC_000185515