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TEM Asbestos air sample results, ATC, Sept 2002

Machine-extracted title · confidence 95%

Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Department of Education school.

NYC-WTC_000175528
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 1920 Lab Group #: 8837 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 001124 Client Sample #: Area Examined: 0 04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV ' # Grid Openings: 4 Analysis Date: 9/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or / EDS iNonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) 1 Jr . . If Q ((

Snuct = > 0 5a >5 1 Aspect Ratio Grid acceptance \= Positive diffraction oattern properties conforming to <50% undissolved liter, ovehapped or folded Totals laboratory identification criteria ooservec <10% paniculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% FIB C M >5l '. = EDS soectrum conforming to laooratory holes or opaque areas loentificEtipn criteria opserved Chrysotile । AMPHIBOLES F = Single Fioer Amphibole i Amosite . B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431395 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175528

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NYC-WTC_000175528Source: NYC Law Department, mirrored locally

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