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TEM grid analysis record, Sample 5, P.S. 89M, May 2002

Machine-extracted title · confidence 85%

Technical record of transmission electron microscopy grid analysis for air sample 5 from P.S. 89M conducted in May 2002.

NYC-WTC_000178514
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7597 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: 5/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS (Nonabb No F B C M >"C5p i>=5tJ Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

Cl

Struct = > 0.3p > 5:1 Aspect Ratio Grid acceptance: A-Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfalded or overtapped grid squares <5% F B C M >5m 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) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389906 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178514

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NYC-WTC_000178514Source: NYC Law Department, mirrored locally

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NYC-WTC_000180877

Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on February 2, 2002.

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