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TEM Asbestos air sample results, NYC BOE, June 2002

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Laboratory report documenting TEM analysis of air samples collected from NYC Board of Education facilities on June 20, 2002.

NYC-WTC_000179843
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 8194 Filter Type / Filter Area: MCE 385 mnY Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/20/02

Analysis Performed By: MARKPEYSAKHOV

GO. Structure Structure Type Length ID of Stnrcture Norv EDS No (Nonadb F 5 C >=05 (J Chrys Amphibole Nonasb AmbigyND No Coord <5m Elements)

Struct = > 0.5n >5:1 Aspect Ratio Grid acceptance: Totals laboratory identification criteria observed '/= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5m identrfrcation criteria observed Chrysotile a.mphiboles 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 Acbnolite ' Non-Identified MSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003461695 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179843

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NYC-WTC_000179843Source: NYC Law Department, mirrored locally

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