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TEM asbestos air sample results, NYC BOE, Jan 2002

Machine-extracted title · confidence 95%

Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities in January 2002.

NYC-WTC_000174754
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1810 Lab Group #: 63 /5 Filter Type / Filter Area: MCE 385 Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/19/02

Analysis Performed By: MAKKPEYSAKHOV

GO, Structure Structure Type Length ID of Structure iN or 4 EDS No (Nonadb F B C M >=05 u Chrys A.rnpnibole Nonasb Ambig/ND No Coord <5u Elements)

/ xVY m

Struct = > 0.5p >5:1 .Aspect Saric Grid acceptanoe: 4= Positive ciffractior pattern properties conforming to <50% undissolved filte,', overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u 4= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES i Amphibole . F = Single Fiber Amosite B = Bundis (<3 fibers <1 fiber d.ameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSO = Nc Structures Dstected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660168

NYC-WTC_000174754

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NYC-WTC_000174754Source: NYC Law Department, mirrored locally

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NYC-WTC_000176750

Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on April 3, 2002.

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