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TEM asbestos air count sheet, lab group 7230, sample 9

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_000201970
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NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NY'C BOE Volume (liters'): 1840 Lab Group #: 7230 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: ~ 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 AnalysisJIatec 3/27/02

Analysis Perlorined By: ROMAN PEYSAKBOV

GO. Structure Structure Type Length ID of Structure N or ■/ EDS No (Nonadb F C M >=05 p ~ t>=5|J Chrys Amphiboie Nonasb Ambig/ND No Coord <5p ' Elements)

U-1 n /F------ . ;i

Struct = > O.Sg > 5:1 Aspect Ratio Grid acceptance:

y = Positive diffraction pattern properties conforming to <50% undissplved 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 ), >5U;. y= EDS spectrum conforming to laboratory identification criteria observed I - holes or opaque areas : • I Chrysotile : i /AMPHIBOLES ■ Amphibole F = Single Fiber,. ; I | / Amosite B = Bundle (<3 fibers <1 fiber diamete.r apart Crrrcidolite ; Ambiguous C = Closter (>3 Intersections) i Anthophyllite i Non-Asbestos / ) Tremolite i M = Mathx : Non-IdentiiTed ./'!■■ /Actinolite / : NSD = No Structures Detected

CITY_21MC100_011275896

NYC-WTC_000201970

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NYC-WTC_000201970Source: NYC Law Department, mirrored locally

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