TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NN'C BOE Volume (liters): 1952 Lab Group #: 607S Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mra"

GRID BOX: Magnification: 20,000 GRJD ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/11/01

Analysis Performed By: ROMAN PEYSAKHOV

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

/ yg W47 Zz /;

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i__ / I i

Struct = > 0,5u .> 5:1 .Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laooratop identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F C M >5u 7= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile I AMPHlBOLES~i 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

CITY_21MC100_003104678

NYC-WTC_000184135