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TEM Asbestos air sample results, NYC BOE, Feb 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 on February 2, 2002.
NYC-WTC_000180874Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: . NYC BOE Volume (liters): 1928 Lab Group #: 6535 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124
Client Sample #: 4 Area Examined: 0.04496 rnm^
GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/2/02
Analysis Performed By: MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure N or \ EDS (Nonadb No F B C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5m
-2 X.-g A
Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:
Positive difiraction pattern properties conforming to <50% undissolved (liter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed
EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F BIC M >5p
identirication criteria observed Chrysotile i AMPHIBOLES I Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite i Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003467667 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180874
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NYC-WTC_000180874Source: NYC Law Department, mirrored locally
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