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TEM Asbestos air sample results, NYC BOE, Mar 2002

Machine-extracted title · confidence 95%

Record of transmission electron microscopy data for an asbestos air sample collected from a New York City Board of Education location in March 2002.

NYC-WTC_000176523
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Scanned page image, NYC-WTC_000176523
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NYC 9/11 Public Portal Document

TEMAsbestosJMrlCount Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7159 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 GRID BOX: Magnification: 20 000 GREP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C M >=05 p >=5(J ~CKrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

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Struct = > O.og > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to *^0% undissolved filter, overlapped orfolded Totals laboratory 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 I AMPHIBOLES ; Amphibole F = Single Fiber i Amosite ] B = Bundle (<3 fibers <1 fiber diameter apart ' Crocidolite ' Ambiguous C = Cluster (>3 Intersections) i Anthophyllite i Non-Asbestos I Tremolite M = Matnx Non-Identified i Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470472 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176523

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NYC-WTC_000176523Source: NYC Law Department, mirrored locally

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