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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 from a New York City Board of Education site.
NYC-WTC_000180449Page 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 #: 7185 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 4 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/23/02
Analysis Performed By: ROMAN PEYSAKHOV
GO, Structure Structure Type Length ID of Structure N or n EDS No >=05 p (Nonadb F B C M >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)
/I Z z
Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: y = 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 obsenred Chrysotile AMPHIBOLES । Amphibole F = Single Fiber Amosite ' B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite j Ambiguous C = Cluster (>3 intersections) Anthophyllite i Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC10 0_0 03 46'7 014
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180449
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NYC-WTC_000180449Source: NYC Law Department, mirrored locally
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