NYC-WTC_000204645

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Grout) #: 7098 Filter Type / Filter Area: MCE 385 mm’ Lab Sample 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/16/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or EDS No (Nonadb F B C M >=05 p Chrys Amphibole Notiasb Ambig/ND Elements) No Coord <5|J

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Struct => 0,5^1 >5:1 Aspect Ratio Grid acceptance:

■■1= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped 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 >5u v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 ntersections) Anthophyllite I Non-Asbestos Tremolite M = Matrix ' Non-Identified । Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO4O82475

NYC-WTC_000204645