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TEM Asbestos air sample results, NYC BOE, Nov 2001
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 site.
NYC-WTC_000179264Page 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 #: 5999 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 21 Grid Opening Size: 0.01124
Client Sample #: 21 Area Examined: 0.04496 mm-
GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/30/01
Analysis Performed By: MARK PEYSAKHOV '
GO, Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/ND N0 Coord <5u Elements)
3
Struct = > 0.5p. -> 5:1 Aspect Ratio Grid acceptance; 7= Positive diffraction pattern properties conforrring 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 i M >5u v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j AMPHIBOL^i Amphibole F = Single Fiber I Amosite I S = Bundle (<3 fibers <1 fiber diameter apart j Crocidolite j Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Delected
CONFIDENTIAL, CITY_21MC100_003458547 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000179264
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NYC-WTC_000179264Source: NYC Law Department, mirrored locally
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