TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEMAsbestosfair) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 5897 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 9 Area Examined: 0.04496 mm- GRID BOX: S39 Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed By: MICHAEL GORYCKI

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

I AAn 3A Zi

? Fl "3 A

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Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance: \'= Positive diffraction pattern properties conforming to •:50% undissoived filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I Tremolite M = Matrix Nan-Identified 1 Actinolite NSD = No Structures Detected L

CITY_21MC1OO_OO31O6447

NYC-WTC_000185364