NYC-WTC_000230133

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6429 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/24/02 ■

Analysis Performed By: ROMAN PEYSAKHOV

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

TZ X v 2 <1

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Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: 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 ^/= 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 I Crocidolite Ambiguous C = Cluster (>3 Intersections) i Anthophyllite j Non-Asbestos ■ I T remolite ■ M = Matrix Non-Identified Actinolite I

CONFIDENTIAL, CITY_21MC100_003388784 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230133