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TEM Asbestos air sample results, NYC BOE, Aug 2002

Machine-extracted title · confidence 95%

Laboratory report documenting transmission electron microscopy analysis of an air sample for asbestos collected by the NYC Department of Education.

NYC-WTC_000175503
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Scanned page image, NYC-WTC_000175503
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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): 1920 Lab Group #: 8759 Filter Type / Filter Area: MCE 385 mm- Lab Sample 3 Grid Opening Size: 0 01124 Client Sample #: 03 Area Examined: 0 04496 mtn- GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By; j\/f----- ROMAN PEYSAKHOV

eo Structure Structure Type Length ID of Structure N orT EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

/&& ----------------

Struct = > 0 5(1 > 5 1 Aspect Ratio Gnd acceptance V= Posibve diffraction pattern properbes conforming to "“0% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5p V= EDS spectrum conforming to laboratory holes or opaque areas idenPfication cnteria 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 M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3431298

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175503

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NYC-WTC_000175503Source: NYC Law Department, mirrored locally

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