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TEM Asbestos Air Sample Results, NYC BOE, June 2002

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Laboratory results for TEM asbestos air sampling conducted at NYC Board of Education on June 17, 2002.

NYC-WTC_000179775
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 8136 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/17/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Stnjcture Type Length IDofStnrcture N or "7 EDS No (Nonadb F B C M >=05 p >=5)j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: •J= Positive diffraction pattern properties confomiing to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5p 'J- EOS 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFWEHIIAl, CIIX_21MC1OO_OO3161599 SUBJECT IO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179775

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NYC-WTC_000179775Source: NYC Law Department, mirrored locally

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