TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

‘1 EM Asbestos (air) Couat Sheet Client Name: N’l'C BOh Volume /liters Lab Group #: FilLer Tvpe / Filter Area: MCF Lab Sample #: 8 Grid Opening Size: U J.

Client Sample #: Tl 1 Area Examined: ru0449o m’Ti-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: iOO Ke'v' # Grid Openings: 4 Analysis Date;

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Siructure Type | Length ID of Structure A or y ! EDE No F B C M ■=05m >=5m Chrys Amphibole j Nonasb aEF^I No Coord <5p Elements,! !

) <6

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance:

\'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals iaboratory ioentification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F F B C M >5iJ v'= EDS spectrum conforming to laboratory holes or opaque areas L identification criteria obsevcc Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle !<j 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_003103497

NYC-WTC_000183911