TEM asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: BOE Volume /liters): 1936 Lab Group #: 6073 Filter Tvpe / Filter Area: MCE 385 mm" Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 4 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 12/10/01

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID Of Structure N or V EDS No (Nonadb B C M >=05 (J >=5(j Chrys Amphibole Nonasb Amoig/ND No Coord <5p Elements)

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Struct = > 0.5u > 5:1 .Aspect Ratio Brid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria ooserved <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p 'I- EDS soectrum conforming to laboratory holes or opaque areas identi’ication critena observed Chrysotile i AMPHIBOLES j Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous" ) Anthophyllite C - Cluster (>3 Intersecpons) Non-Asbestos I Tremolite M = Matrix i Actinolite i Non-Identified NSD = No Structures Detected

CITy_21MC100_003104579

NYC-WTC_000184059