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NYC-WTC_000189943

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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NVC BOE Volume (liters): 1824 Lab Group # 6674 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Size 0 01124 Client Sample #: Area Examined: 0 04496 mm-

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/14/02

Analysis Performed By: MARK PEYS,AKHOV

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

Struct = > 0 ip >51 Aspect Ratio Grid acceptance '/= Positive diffraction pattern properties conforming to ^^0% undissolved filter, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5u n/= EDS spectrum conforming to laboratory holes or opaque areas identification 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 T remolite M = Matrix Non-ldentified Actinolite NSD = No Struclures Delected

CITY_21MC100_003088378

NYC-WTC_000189943

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NYC-WTC_000189943Source: NYC Law Department, mirrored locally

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TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC-WTC_000184080

Technical data sheet recording transmission electron microscopy findings for an air sample analyzed on December 8, 2001 for the New York City Board of Education.

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