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TEM asbestos air count sheet, lab group 6064, sample 17

Machine-extracted title · confidence 100%

Laboratory bench sheet tallying asbestos structures seen by electron microscope for an air sample; raw counts, not the reported result.

NYC-WTC_000225451
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NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (litcrs i: 1936 Lab Group #: 6064 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 17 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20 000 GRIDED: 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 Nor 7 EDS ■ No {Nonadb F B C M >=05 p ' '=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

Y -’ T N

Struct = > 0.5)1 > 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 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 i Amphibole F = Single Fiber Amosite 8 = 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

CITY_21MC100_000622491 NYC-WTC_000225451

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NYC-WTC_000225451Source: NYC Law Department, mirrored locally

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Laboratory bench sheet tallying asbestos structures seen by electron microscope for an air sample; raw counts, not the reported result.

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