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TEM asbestos air sample results, NYC BOE, Dec 2001

Machine-extracted title · confidence 95%

Laboratory report documenting transmission electron microscopy analysis of air samples collected by the NYC Board of Education in December 2001.

NYC-WTC_000184481
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 6220 Filter Type / Filter Area: MCE 385 mm-

Lab Sample #: 21 Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0 04496 mm‘

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openin2s: 4 Analysis Date: 12/29/01

Analysis Performed By: MARK PEYSAKHOV

Structure Structure Type - Length ID of Structure N or 9 EDS (Nonadb No F B C M >=05 u :>=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

^3

Struct = > O.ou >5:1 Aspect Ratio Grid acceptance: 2 = Positive diffraction pattern properties conforming to <50% und ssolvea filter, overlapped or folded Totals labaratory ibentification criteria observed <10% parCcjIate coverage >50% coverage ale least 20 unfolded or overlapped grid squares <5% F B C M ’5p /= EDS spectrum conforming to laboratory holes or opaque areas identification cnteria ooserved Chrysotile AMPHIBOLES I Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Marrix Non-Identified Actinolite MSB = No Structures Detected

CITY_21MC100_003105181

NYC-WTC_000184481

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NYC-WTC_000184481Source: NYC Law Department, mirrored locally

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TEM asbestos air sample results, NYC BOE, Nov 2001

NYC-WTC_000185218

Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on November 8, 2001.

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