TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Yame: NYC BOE Volume /liters): IS24 Lab Group #: 6674 Filter Tvpe < Filter Area: MCE 3S5 mn Lab Sample #: 10 Grid O2ening Size: 0.0i i24 Client Sample #: 10 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRIDED: J LrXYor 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- 4 EDS No >=05 p (Nonadb F B C M >=5(j Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

AV

I I 1 I i Struct = > 0.5n >5:1 Aspect Ratio Grid acceptance; Positive diffraction pattern propenies coniorming to <50% undissolved filler, overlapped or folded Totals laboratory identificaiion criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or ovsnacoec and squares <5% F i B j C I M I EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ) j । i I AMPHIBOLES Amphibole ' I i ) ) F = Single riber Amosite 3 = Sunale '<3 fibers <1 Sber diameter apart Crocidolite Ambiguous i ) ) i , C = Cluster ;>3 Iniersectionsi Anthophyllite j Non-Asbestos j Tremolite M = Matrix i Non-Identified ) Actinolite NSC = No Structures Detected

CITY_21MC100_003103199

NYC-WTC_000183773