NYC-WTC_000198057

NYC 9/11 Public Portal Document

TEM Asbestos (airVCount Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7685 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B c M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5p

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Struct = > 0.5(1 >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 i >5p y = EDS spectrum conforming to laboratory holes or opaque areas ---- i------ 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 = Matnx Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 03029636

NYC-WTC_000198057