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NYC-WTC_000229852

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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7684 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 GRID BOX: Maenification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Stnjcture Nory" EDS No (Nonadb F B C M >=^05 p >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ■/ = Positive diffraction pattern properties conforming to <50% undissoweb filter, overlapped or lolded Totals laboratory identification criteria observed <10% partiGulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u 7 = EDS spectrum conforming to laboratory holes or opaque areas identfication criteria 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_002723130 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229852

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NYC-WTC_000229852Source: NYC Law Department, mirrored locally

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Laboratory results for TEM asbestos air sampling conducted at NYC Board of Education facilities on June 22, 2002.

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