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TEM Asbestos air sample results, NYC BOE, Feb 2002
Machine-extracted title · confidence 50%Laboratory data sheet recording transmission electron microscopy analysis of air samples for asbestos from NYC Board of Education facilities.
NYC-WTC_000180979Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6606 Filter Tvpe / Filter Area: MCE 385 mm* Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 3 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/9/02
Analysis Performed By: MARK PEYSAKHOV
GO, Structure Structure Type Length ID of Structure Nor'/ EDS No (Nonadfc F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)
I 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 overlapped grid squares <5% F B C M V= EDS spectrum conforming to iaboratory holes or opaque areas identification criteria observed Chrysotile ■AMPHIBOLES Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous i Anthophyllite C = Cluster (>3 Intersections) Non-Asbestos i Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003467814 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180979
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NYC-WTC_000180979Source: NYC Law Department, mirrored locally
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