TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6142 Filter Type / Filter Area: MCE 385 Grid Opening Size: 0.01124 Lab Sample #: 9 Area Examined: 0.04496 mm^ Client Sample #: Magnification: 20,000 GRID BOX: T’ Accelerating Voltage: 100 KeV GRID ID: # Grid Openings: 4 Analysis Date: 12/19/01

Analysis Performed By: ROMAN PEYSAKHOV

Length ID of Structure N or 7 EDS GO, Structure Structure Type (Nonadb Nc F B C M >=05 y >=5|J Chrys Amphibole Nonasb Ambig/ND Elements) No Coord "Su

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Struct = > 0.5)1 > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification critena observed <10% paitioulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B j C M >5p 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observeo Chrysotile amphiboles' Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Iniersecllons) Anthopnyllite Non-Asbestos M = ivlatrix T remolite Actinolite Non-Identified r-iSD = Nc Structures Detected

CITY_21MC100_003104897

NYC-WTC_000184282