NYC-WTC_000221922

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7558 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No >Y15C ; •=5p (Nonadb F B C M Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

I /i 0

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Struct = > 0.5)1 > 5:1 .A.spect Ratio Grid acceptance: '/s Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate 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 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_000489527 NYC-WTC_000221922