NYC-WTC_000227750

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: N^’C BOE Volume (liters): 1840 Lab Group #: 6574 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No >=05 u i>=5|J {Nonadb F B C M Chrys Amphibole Nonasb AmbigzND No -Coord <5u Elements)

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Struct = > 0.5p > 5: i Aspect Ratio Grid acceptance: 'Z: Positive diffraction pattern properties conforming to <50% undissolved filtei, overtapped or (olded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amph'iboles' 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 Actinolite Non-Identified J NSD - No Structures Detected

CITY_21MC100_002899244

NYC-WTC_000227750