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TEM Asbestos air sample results, NYC BOE, Nov 2001

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_000179262
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Scanned page image, NYC-WTC_000179262
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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): 1928 Lab Group #: 5999 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 min-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/30/01

Analysis Performed By: IvLARK PEYSAKHOV

GC. , Structure Structure Type Length ID of Structure Nor y EDS (Nonadb No F B C M i >=05 U >=5|j Ghrys Amphibole Nonasb Ambig/ND No Coord Elements) <5tJ

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissoked filter, overiappeo or folded Totals laboratory identification criteria obsenzed <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 AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) j Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458545 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179262

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NYC-WTC_000179262Source: NYC Law Department, mirrored locally

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