Asbestos TEM air sample data sheet, Sample 2, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ’ NYC SCA Volume (liters): 1944 ■ Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 2 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GREP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or < EDS No >=05 p Nonasb (Nonadb F B C M =50 Chrys Amphibole AmbigtND No Coord <5p Elements')

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Struct = > O.Sp .> 5:1 .Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to "50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed . <10% parficulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p ■ ^1= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile I AMPHIBOLES j .Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite j NSD = No Structures Delected

CITY_21MC100_003100034

NYC-WTC_000182617