TEM Asbestos air sample results, NYC SCA, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC SCA Volume (liters): 1936 Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size; 0.01124 Client Sample #: 8 Area Examined: 0.04496 mm* GRID BOX. Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: ROMAN^YSAKHOV

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

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Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance: n/= 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 overtapped 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 Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

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NYC-WTC_000185095