TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: N-YC BOE Volume (liters): 1808 Lab Group #: 6788 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: IS Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure KorV EDS No ’=05 0 {Nonadb r B C M >=5p Chrys AmphiDole Nonasb Ambig/ND No Coord <5u Elements)

Struct = > 0.5p > 5: i 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 F B C i M i >5p EDS spearum conforming to laboratory holes or opaque areas i. identification criteria observed AMPHIBOLES Chrysotile i .i F = Single Fiber Amphibole I i i Amosite Ambiguous ) i i 3 = Sundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intellections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Identified i NSD = No Structures Detected Actinolite 1. . .i

CITY_21MC1OO_OO31O3422

NYC-WTC_000183862