TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume niters): 1936 Lab Group #: 6028 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/4/01

Analysis Performed By: ROMAN PEYSAKHOV

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

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Struct = > 0.5p. > 5.1 Aspect Ratio Grid acceptance: M = Positive diffractiori pattern properties conforming to <50% undissolved filter, overlapped or folded Totals Iaborato7 identification criterie observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F Bic M >5u •V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES 1 Amphibole F = Single Fiber Amosite i B = Bundle (<3 fibers <1 fiber diameter apan Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Delected

CITY_21MC100_003104471

NYC-WTC_000183988