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TEM Asbestos air sample results, NYC BOE, Apr 2002

Machine-extracted title · confidence 95%

Laboratory data sheet for TEM asbestos analysis of an air sample collected from a New York City Board of Education site on April 18, 2002.

NYC-WTC_000176975
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7455 Filter Type / Filter Area: MCE 385mm- Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/18/02

Analysis Performed Bv: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS No INonadb F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND No Coord i <5(J Elements)

3^ /■

I i

Struct = > 0.5p >5:1 A.ipect Ratio Grid acceptance:

'A Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laporatory iceniification criteria observed < 10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% j F i B ! C i M V = EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j AMPHIBOLES Amphibole | F = Single Ficer Amosite B = Sunale i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ' C = Cluster !'>3 Intersections) Anthophyllite Yon-Asbestos ' Tremolite M = Matrix Yon-Identified Actinolite NSC = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003471141 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176975

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NYC-WTC_000176975Source: NYC Law Department, mirrored locally

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