NYC-WTC_000228616

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7513 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Staicture Type Length ID of Structure N or EDS ; No ■3705p : '=5p Amphibole Nonasb (Nonadb F B C M Chrys Ambig/ND No Coord <5p Elements) j ------------------- 1

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Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: Positive ciffraction pattern properties conforming to <50% undissotved 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 >5m >/= EDS speiarum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Filler Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolife Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No StTJctures Detected

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NYC-WTC_000228616