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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 by the NYC Board of Education on March 26, 2002.
NYC-WTC_000180524Page 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 #: 7216 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/26/02
.Analysis Performed By: MARK PEYSAKHOV
GO. Structure Structure Type Length 1 ID of Structure N or N EDS (Nonadb No F B C M >=05 M >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)
J 4^^ -5
Struct = > 0.5(1 > 5:1 Aspect Ratto Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% parbculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ; AMPHIBOLES i ■Amphibole F = Single Fiber I Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart ; Crocidolite Ambiguous i Anttiophyllite C = Cluster (>3 Intersections) Non-Asbestos i T remolite M = Matnx Non-Identified Actinolite NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003467116 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180524
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