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TEM asbestos air sample results, NYC BOE, Mar 2002
Machine-extracted title · confidence 50%Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site.
NYC-WTC_000180444Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7175 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 20 Grid Opening Size: 0.01124 Client Sample #: 20 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/23/02
Analysis Performed By: MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure Nor v EDS (Nonadb No F B C M >=05 M >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)
-3 <55 7=’
Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properbes conforming to <50% undissolved filter, overlapped or folded Totals laboratory identificabon criteria observed <:10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5p 'i- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ) AMPHIBOLES Amphibole F = Single Fiber I 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 Detecfed
CONFIDENTIAL, CITY_21MC100_003467001 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180444
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NYC-WTC_000180444Source: NYC Law Department, mirrored locally
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Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education facility.
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