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TEM Asbestos air sample results, NYC BOE, Oct 2001
Machine-extracted title · confidence 95%Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site.
NYC-WTC_000179358Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 5820 Filter Type / Filter Area: MCE 385 mm- Lab Sample #; 17 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: # Grid Openings: 4 Accelerating Voltage: 100 KeV
Analysis Performed By: MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C I>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)
rz.. a? P
Struct = >0.5u >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissoLed filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C ?5p 9= EDS spectrum 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 Non-Asbestos M - Matrix T remolite Actinolite Non-Identificd NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC1OO_OO3459O22 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000179358
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NYC-WTC_000179358Source: NYC Law Department, mirrored locally
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