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TEM Asbestos air sample results, NYC BOE, Mar 2002
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_000176505Page image
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OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1800 Lab Group #: 7131 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12. Area Examined: 0.04496 mm- GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/19/02
Analysis Performed By: MARKPEYSAKHOV
GO. Structure Structure Type Length ID of Structure N or v' .EDS No (Nonadb F B C >=05 M >=5p Chrys Amphibole Nonasb ■ Ambig/ND i No Coord <5(1 Elements)
Struct = > 0.5(1 ->5:1 Aspect Ratio Grid acceptance; Positive diffraction pattern properties conforming to ^50% undissotved 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 >5(J ‘ •/= EDS spectrum conforming to laboratoy holes or opaque areas idenlification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite M=Mabiit Actinolite Non-Identified NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003470435
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176505
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NYC-WTC_000176505Source: NYC Law Department, mirrored locally
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Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site.
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Laboratory report documenting transmission electron microscopy analysis of an air filter sample collected from a New York City Board of Education site.
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