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TEM Asbestos air sample results, NYC BOE, Mar 2002
Machine-extracted title · confidence 95%Laboratory report documenting transmission electron microscopy analysis of an air filter sample collected from a New York City Board of Education site.
NYC-WTC_000176643Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters'): 1800 Lab Group #: 7261 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/30/02
Analysis Performed By: MARK PEYSAKHOV
GO. Structure Stnjcture Type Length ID of Structure Norv EDS No Nonasb (Nonadb F B C M >=05 p >=5m Chrys Amphibole Ambig/ND No ’ Coord <5p Elements)
Struct = > 0.5(j .>5:1 Aspect Ratio Grid acceptance; Positive diffraction pattern properties conforming to '^0% 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 V= 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 I Tremolite M = Matrix I Actinolite Non-Identified NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_0 03470652 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176643
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NYC-WTC_000176643Source: NYC Law Department, mirrored locally
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