NYC-WTC_000202468

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 9089 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample #: 05 Area Examined: 0.04496 mm"

I GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: TOO KeV # Grid Openings: 4 Analysis Date: 11/11/02 !i Analysis Performed By: ROMAN PEYSAKHOV

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

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r' Photo No. (from 1 in 5 asbestos containing samples) Grid acceptance; Struct = > 0.5|j .> 5:1 Aspect Ratio <50% undissoived filter, overlapped or folded Totals \'= Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p holes or opaque areas <= EDS spectrum confcrming tc laboratory Chrysotile identifioation criteria observed AMPHIBOLES j Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

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NYC-WTC_000202468