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TEM Asbestos air sample results, NYC BOE, Feb 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_000181175
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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 (liters): 1920 Lab Group #: 6775 Filter Type / Filter .Area: MCE 385 mm- i=:5tb-S£Ul]J5lej^ 11 Grid Opening Size: 0.01 124

Client Sample #: EO-13 AreaEMmineri: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/22/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type [ Length ID of Structure N or 7 EDS (Nonado No Coord No Y B c M >=05 |j <5u >=5iJ Chrys Amphibole Nonasb Ambig/ND Elements)

Z y <3 2-*=^’ a 2? 3

Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded TotaJs laboratory identification criteria observed <10% particulate coverage >60% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Clirysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite J I M = Matrix Non-Identified | Actinolite NED = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468086 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181175

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NYC-WTC_000181175Source: NYC Law Department, mirrored locally

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