NYC-WTC_000223685

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7399 Filter Type / Filter Area: MCE 3S5 mm- Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4,13,02 J Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or \ :DS No —rz—' iNonacD F B C M >=05 M >=5(J Chrys Amphibole Nonasb Amoo/ND I Coord <5p j E'emerts)

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Struct = > 0.5n >5:1 Aspect Ratio Grid acceptahce: Posibve 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% [ 1 F I B , C M , v = EDS spectrum conforming to laPoraiory holes or opaque areas laenrification cntena observed Chrvsotile j ---------- 1--------- 1- AMPHIBOLES Amphibole ! F = Single Fiber Amosite B = Buncle (<3 libers <1 fiber diameter apan Crocidolite Ambiguous ( C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Actinolite j Non-ldentified i NSD = No Structures Detected

CITY_21MC100_002919754

NYC-WTC_000223685