NYC-WTC_000204666

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NXG BOE Volume (liters): 1928 Lab Group #: 7193 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/24/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 4 EDS No (Nonadb F B C M >=05 p >=5(J Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

I 1 I

Struct = > 0.5n > 5:1 .Aspect Ratio Grid acceptance:

v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals :aDoratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% f F I B ! C i M >5b 'J = EDS spectrurr conforming to laboratory holes or opaque areas ide.ntification criteria observed Chrvsotile AMPHIBOLES Amphibole E = .Single Fiber Amosite 3 = Sunale i<3 fibers <1 libe.r diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos i Tremolite .1/1 = Matrix Non-ldentified Actinolite MSD = No Structu-es Detected

CITY_21MC1OO_OO3O6168O

NYC-WTC_000204666