Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

I Client Name: TEM Asbestos (air) Count Sheet Airtek Volume (liters): 1490

I Lab Group #: Lab Sample #: 6152 7 Filter Type / Filter Area: Grid Opening Size: MCE 385 mm' 0.01124 Area Examined: 0.0562 mm' I Client Sample #: GRID BOX: 010 Magnification: 20,000 GRID ID: 3 Accelerating Voltage: 100 KeV 1 # Grid Openings: 5 Analysis Date: 12/20/01

Analysis Performed By: I MARK PEYSAKHOV

GO. Structure Structure Type I Length ID of Structure Nor v EDS

I No Coord No •F B •C M >=05 u <5N >=5p Chrys Amphibole Nonasb Ambig/ND (Nonadb Elements)

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c°7

,c/ice -

I I I I Ti

I I Struct = > 0.5µ > 5:1 Aspect Ratio Grid acceptance:

I '1= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or foldedate laboratory identification criteria observed <10% particulate coverage>50% coverage least 20 unfolded or overlapped grid squares <5% Totals F B C M >5p 1= EDS spectrum conforming to laboratory holes or opaque areas

I identification criteria observed

F = Single Fiber AMPHIBOLES Amosite Chrysotile Amphibole 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous

I C = Cluster (>3 Intersections) M = Mamx Anthophyllite Tremolite Actinolite Non-Asbestos Non-Identified NSD = No Structures Detected _—..—

I NYC-WTC 000098550