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Document / 236 pages

TEM air sample results, 125 Liberty St, Oct 2002

Machine-extracted title · confidence 100%

Chain of custody and cover letter for transmission electron microscopy analysis of air samples from apartments at 125 Liberty Street.

NYC-WTC_000131492–000131727
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Scanned page image, NYC-WTC_000131607
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NYC 9/11 Public Portal Document

TEM Asbestosair) Count Sheet Client Name: ATC Volume(liters): 3600

• Lab Group #: Lab Sample #: 9041 7 Filter Type / Filter Area: MCE 385 mm2 Grid Opening Size: 0.01124 Area Examined: 0.24728 mma Client Sample #: 10 GRID BOX: f Cf 7S Magnification: 20,000 GRID ID: g f1J Accelerating Voltage: 100 KeV # Grid Openings: 22 Analysis Date: 10/30/02

Analysis Performed By: ROMAN PEYSAKHOV

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:~iT•I~i!F7~iuTi~iifti[~•~3•';~ir: «• ~:I ~ n~ . u • :_ Vuu CWEi4JlGfI4G: Struct = > Q.5}u > 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals J= Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5µ 'I= EDS spectrum conforming to laboratory holes or opaque areas Chrysotile identification criteria observed AMPHIBOLES Amphibole. F: Single Fiber Amosite i Ambiguous B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 intersections) i Anthophyllite Non-Asbestos Tremolite i M =Matrix Non-Identified Actinolite NSD = No Structures Detected

NYC-WTC 000131607

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NYC-WTC_000131607Source: NYC Law Department, mirrored locally

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