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TEM Asbestos air sample results, NYC BOE, Aug 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_000175396Page 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 #: 8739 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: 8/23/02
Analysis Performed By: _______ ROMAN P^SAKHOV
■ GO. Structure Structure Type Length ID of Structure Norv EDS No >=05 M ;>=5iJ (Nonadb F B C M Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)
siJSi 2 .57^
Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ■')= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped 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 >5m EDS spectrum conforming to iaboratoiy holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B A Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C-= Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite N8D = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003430913 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175396
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NYC-WTC_000175396Source: NYC Law Department, mirrored locally
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