Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet Client Name: Airtek Volume (liters): 1310 I Lab Group #: Lab Sample #: 6152 23 Filter Type / Filter Area: Grid Opening Size: NICE 385 mm= 0.01124

Client Sample #: 033 Area Examined: 0.06744 mm2

GRID BOX: d Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV 1 # Grid Openings: 6 Analysis Date: 12/20/01

I Analysis Performed By: MARK PEYSAKHOV

1 No GO. Coord Structure No Structure Type F B C MI >=05 N Length >=5p <5N Chrys ID of Structure Amphibole Nor q Nonasb Ambig/ND EDS (Nonadb Elements)

Y r~

1 I

[J I Struct => 0.5µ .> 5:1 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% Totals F B C M >5u '1= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite Ambiguous Li B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) = M Matrix Crocidolite Anthophyllite Tremotite Actinolite Non-Asbestos Non-Identified NSD = No Structures Detected

I NYC-WTC 000098566