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Asbestos air sample data sheet, Jan 2002

Machine-extracted title · confidence 85%

Technical data sheet recording transmission electron microscopy parameters and results for an asbestos air sample.

NYC-WTC_000177224–000177239
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Scanned page image, NYC-WTC_000177226
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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): 1840 Lab Group #: 6492 Filter Type / Filter Area: MCE 385 Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRnJID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/28/02

Analysis Performed By: MARKPEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorV EDS No -05 p Amphibole Nonasb (Nonadb F B C M Chrys Ambig/ND No Coord <5u Elements)

•3

II I III Struct = > 0,5p -> 5:1 Aspect Ratio Grid acceptance: 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 V= EDS spectrum conforming to laboratoiy 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_003471653 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177226

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NYC-WTC_000177226Source: NYC Law Department, mirrored locally

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