TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: m^C BOE Volume (liters): 1896 Lab Group #: 6585 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: T/ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/7/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. . Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p ' =5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

Life if /f V ID -------

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

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overfapped grid squares <5% r F B C M >5u •/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Clirysotile I AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I Anthophyllite ) C = Cluster (>3 Intersections) Non-Asbestos I T remolite I M = Matrix Non-Identified ' Actinolite NSD = No Structures Detected

CITY_21MC100_003103027

NYC-WTC_000183722