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TEM Asbestos air sample results, NYC BOE, Dec 2001

Machine-extracted title · confidence 95%

Technical report presenting transmission electron microscopy data for an air sample analyzed on December 8, 2001 for the New York City Board of Education.

NYC-WTC_000184078
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NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NT’C BOE Volnme (liters): 1936 Lab Group #: 6064 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/8/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS (Nonadb No F B C M >=05 p >=5(j Chrys Amphibole Nonasb Amblg/ND No Coord Elements)

A

3

Struct = > 0.5^1 >5:1 Aspect Ratto Gnd acceptance:

v= 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 unfolded or overlapped grid squares <5% ' F B C M >5p 4= EDS spectrum conforming to laboratory holes or opaque areas -dentification criteria observed Chrysotile I AMPHIBOLY Amphibole = = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous" C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite Non-Identified MSD = Mo Structures Detected

CITY_21MC100_003104607

NYC-WTC_000184078

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NYC-WTC_000184078Source: NYC Law Department, mirrored locally

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