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TEM asbestos air sample results, NYC BOE, Feb 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_000180912Page 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 #: 6556 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124
Client Sample #: 12 Area Examined: 0.04496 mm-
GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/4/02
Analysis Performed By: MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure NorA EDS No J ; Amphibole Nonasb Ambig/ND (Nonadb F B C M >=5(J Chrys No Coord <5p Elements)
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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: '1- 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 >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLLS ’ 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 Structures Detected
CONFIDENTIAL, CITY_21MC100_003467717 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180912
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NYC-WTC_000180912Source: NYC Law Department, mirrored locally
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