NYC-WTC_000229012

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1816 Lab Group #: 7826 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #; 5 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 nun’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV AnaivsisDate; 5/21/02

Analysis Performed By; MARK PEYSAKHOV

GO. Structure Structure Type Lenglh fDofSbvetore Nor V EDS No (Nonadb ) F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambi^/ND No Coord <5p Elerrrents) '

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Struct = > 0,5p > 5:1 Aspect Ratio Grid acceptance: . ■J= Positive dilfractlffli pattern properties conforming to <150% undiasoived filter, overlapped or folded Totals latXMatory idenbftcabon criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid stwares <5% F B C M V= EDS spectrum conforming to laboratory hofes or opague areas identification criteria observed Chrysotile amphiboles Amphibole F = Single Fiber Amosite B = Sundte (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Idcntified NSD = No Structures Detected

CITY_21MC100_002902046

NYC-WTC_000229012