Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet

I Client Name: Lab Group #: Airtek 6120 Volume (liters): Filter Type / Filter Area: 1300 MCE 385 mm2 Lab Sample #: 20 Grid Opening Size: 0.01124

I Client Sample #: 35 Area Examined: 0.06744 mm=

GRID BOX: L. (S Magnification: 20,000

1 GRID ID: # Grid Openings: 6 3C' '' Accelerating Voltage: 100 KeV Analysis Date: 12/16/01

I Analysis Performed By: ROMAN PEYSAKHOV

I GO. Structure No Structure Type F B C M >=05 N <5N Length >=5p Chrys ID of Structure Amphibole Nor J Nonasb AmbigiND EDS (Nonadb Elements) No Coord !

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I I I I t I Li Struct => 0.511 > 5:1 Aspect Ratio Grid acceptance: 'I= Positive diffraction pattern properties conforming to <10% undissolved <50% filter, overlapped or folded particulate coverage '50% coverage ate Totals laboratory identification criteria observed

I 4= EDS spectrum conforming to laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% holes or opaque areas

AMPHIBOLES Chrysotile Amphibole F B C M >5N

F = Single Fiber

I B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Amosite Crocidolite Anthophyllite Tremolite Ambiguous Non-Asbestos M = Matrix Actinolite Non-Identified I NSD = No Structures Detected

NYC-WTC 000098503