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TEM Asbestos air sample data, Sample 13, March 2002
Machine-extracted title · confidence 95%Technical data sheet for the thirteenth transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site in March 2002.
NYC-WTC_000181690Page 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 #: 7247 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/28/02
Analysis Performed By: MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure N or y EDS No >=05 u Amphibole (Nonadb F B C M Chrys Nonasb Ambig/NO No Coord <5p Elements)
Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded oroveriapoed grid squares <5% F B M 1 C EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSC = No Structures Delected
CONFIDENTIAL, CITY_21MC100_003468799 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000181690
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NYC-WTC_000181690Source: NYC Law Department, mirrored locally
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