TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air ) Count Sheet Client .Name: NYC BOE Volume (liters): 1816 Lab Group #: 6856 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 06 ■Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/27/02 _J

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length iD of Structure N or v EDS No TosT Nonasb j Ambig/ND -fNonadtr F ' B C M >=5(j Chrys I Amphibole No Coord <5p --------- ----------- Elements)

□

H

Struct = > ().5p > 5:1 Aspect Ratio Grid acceptance:

3= 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 untolded or overlapped grid squares <5% f F B C M >5m EDS soectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite I _ Non-Asbestos Tremolite M = Matrix I Non-Identified Actinolite NSB = No Structures Delected

CITY_21MC100_0 03103589

NYC-WTC_000183955