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TEM Asbestos air sample results, NYC BOE, Mar 2002
Machine-extracted title · confidence 95%Laboratory record documenting transmission electron microscopy analysis of an air sample for asbestos from the NYC Board of Education.
NYC-WTC_000181484Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7092 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 10 Grid Opening Size: 0.01124
Client Sample #: 12 Area Examined: 0.04496 mm^
GRID BOX: Ma2nification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/16/02
Analysis Performed By: cT MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 M >=5tJ Chrys Amphibole Nonasb Ambig/ND j No j Coord <5m Elements)
Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance: ■yi= 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 overlapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite Non-ldentified NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003468553 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000181484
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NYC-WTC_000181484Source: NYC Law Department, mirrored locally
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