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TEM Asbestos air sample results, NYC BOE, June 2002
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 facility.
NYC-WTC_000179806Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1808 Lab Group #: 8166 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/18/02
Analysis Performed By: MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure N or ■'/ EDS (Nonadb No F B C M >=05 p :>=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)
Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern propert'es conforming to <50% undissolved filter, overlapped or folded Totals laboratory identificahon criteria observed <10% pariiculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p ; 4= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Stnrctures Detected
CONFIDENTIAL, CITY_21MC100_003461642 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000179806
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NYC-WTC_000179806Source: NYC Law Department, mirrored locally
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