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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_000131682
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Volume (liters): 3700 Client Name: ATC mm2 Filter Type / Filter Area: MCE 385 Lab Group #: 9035 Grid Opening Size: 0.01124 Lab Sample #: 16 Area Examined: 0.24728 mm2 Client Sample #: 16 Magnification• 20,000 _GDIR BOX• // 7 Acceleratti_n_n Voltage: 100 KeV RG ID ID: A Analysis Date: 10/29/02 # Grid Openings: 22

Analysis Performed By: ROMAN PEYSAKHOV

totaeo Struct = > 0.5i.t >5:1 Aspect Ratio <50% undissolved filter, overlapped or <10%particulate coverage >50% coverage properties conforming to = Positive diffraction oattem least 20 unfolded or overlapped grid sqwares <5% observed v

laboratory identification criteria opaque areas holes or EDS spectrum conforming to laboratory HiBOLES v=

• identification criteria observed Amosite F = Single Fiber Crocidolite B =Bundle (<3 fibers <1 fiber diameter apart Anthophyllite p C = Cluster (>3 intersections) Tremolite M = Matrix Actinolite NSO = No Structures Detected

NYC-WTC 000131682

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NYC-WTC_000131682Source: NYC Law Department, mirrored locally

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