NYC-WTC_000202464

NYC 9/11 Public Portal Document

TEM Asbesfos (air) Count Sheet Client Name: NYC BOE Volume filters): 1920 Lab Group #: 8726 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 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: 8/21/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Lenglh ID of Structure N or o/ EDS No (Nonadb F B C M >=05 M >=5(j Chrys Amphibole Nonasb Ambig/ND Elements) <5|J

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______________ Struct = > 0.5u _> 5-.1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile jAMPHIBOLES i Amphibole F = Single Fiber i Amosite i 8 = Bundle (<3 fibers <1 fiber diameter apart ! Crocidolite I Ambiguous C = Cluster j>3 Intersections) ' Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003272799

NYC-WTC_000202464