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TEM asbestos air sample results, NYC BOE, Nov 2001

Machine-extracted title · confidence 95%

Laboratory report documenting transmission electron microscopy analysis of an air sample for asbestos collected from NYC Board of Education facilities.

NYC-WTC_000179130
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Scanned page image, NYC-WTC_000179130
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 5849 Filter Type / Filter Area: MCE 385 Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 AnalysisDate: 11/8/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nory EDS No (Nonadb F B C M >=05 p >=5p Ch^s Amphibole Nonasb Ambig/ND No Coord <5p Elements)

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratO7 identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES I Amphibole F = Single Fiber Amosite B = Bundle {<3 fibers <1 fiber diameter apart Crocidolite I ■Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbeslos Tremolite M = Matrix Non-Identified Actinolite ! NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_002743303 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179130

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NYC-WTC_000179130Source: NYC Law Department, mirrored locally

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