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TEM asbestos air sample results, NYC BOE, Mar 2002
Machine-extracted title · confidence 95%Laboratory data sheet recording transmission electron microscopy analysis of an air sample collected by the NYC Board of Education.
NYC-WTC_000180508Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1928 Lab Group #: 7216 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 3 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 ID of Structure N or 7 EDS (Nonadb No F B C M >=05 M :>=5p Chrys Amphibole Nonasb Ambig/ND , No I 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 ate least 20 unfolded or overlapped grid squares <5% F B C M >5u /= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile : .AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) i Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003467100 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180508
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NYC-WTC_000180508Source: NYC Law Department, mirrored locally
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