TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1S24 Lab Group #: 6765 Filter Tvpe ,/ Filter .Area: .MCE 3S5 mm- Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: .Area E.xamined: 0.04496 mm-

GRID BOX: A/y / Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/21/02

Analysis Performed By: ROMAN PEYSAKHOV

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

e/

Struct = > 0.5u >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissoived 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 p i C i : EOS soectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ! i ! AMPHIBOLES r = Single Fiber .Amosite Amphibole ' I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite .Ambiguous C = Cluster (>3 Intersections) Anthophyllite j Non-Asbestos i Tremolite M = Matrix 'j Ncn-Ideaufied j Actinolite i i NSD = No Structures Detected

CITY_21MC100_0 03103365

NYC-WTC_000183840