TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEXT Asbestos (air) Count Sheet Client Name: NYC BOE ^'olume /liters): iSOO Lab Group #: 66'4 Filter Tvpe Filter Area: MCE 3S5 mm- Lab Sample 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/14/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=5p Ch^s Amphiboie Nonasb Ambig/ND No Coord <5u Elements)

A-

Struct = > 0.5n .> 5:1 Aspect Ratio Grid acceptance: y/- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% paniculate coverage >50% coverage ate least 20 unfolded or overtapped gnd spuares <5% j I F I B I C M 1 >5ij EDS spectrum conforming to laboratory holes or opaaue areas L identification criteria observed 1 Chiy'sotile ) AMPHIBOLES i Amphiboie ' r = Sincie Fiber Amosite 3 = 3ijndle (<3 fibers <1 fiber diameter acan Crocidoiite i Ambiguous I C = Cluster (>3 Intersections) Anthophyllite j Non-Asbestos ; Tremolite M = Matrix I Non-IdeniiiTed Actinolite NSO = No Structures Detected i . i

CITY_21MC1OO_OO31O32O2

NYC-WTC_000183774