TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEMAsbestosXair) Count Sheet j Client Name: WC BOE Volume (liters): 1936 Lab Group #: 607 & Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRIPED: 1^2^ Accelerating Voltage: 100 KeV Grid Openings: 4 Analysis Date: 12/11/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of structure N or N EDS j No (Nonadb F B C M >=05 |j Chrys Amphibole Nonasb i Ambig/ND No Coord <5u Elements)

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I rn

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I i I

Struct = > 0,5n > 5 1 Aspect Ratio Grid acceptance: 0= Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped 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 >5u 7= EDS spectrum conforming tc laboratory holes or opaque areas Identification criteria observed Chrysotile ' AMPHIBOLES ' Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 ‘iber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections’) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O46'7 4

NYC-WTC_000184131