TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1855 Lab Group #: 6576 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0,04496 mnV

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 AnalysisDate: 2/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length i D of Structure N or 0 EDS (Nonadb No F B C ( M >=05 p >=5)3 i Chrys Amphibole Nonasb Ambig/NC No Coord <5p Elements)

i

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

7= Positive diffraction pattern properties conforming to <50% undissoli/ed filter, overlapped or folded rotaks <10% particjlats coverage >50% coverage ate laboratory identification criteria observed

V'= EDS specarum conforming to iaboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c J Chrvsotile Identification criteria observed AMPHIBOLES I Amphibole F = Single Fiber Amosite B = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyiiite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite M.sn = No Structures Detected

CITY_21MC100_003103006

NYC-WTC_000183710