Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet I Client Name: Lab Group #: ATC 5954 Volume (liters): 1300 Filter Type / Filter Area: MCE 383 mm=

I Lab Sample #: Client Sample #: 8 8 Grid Opening Size: 0.01124 Area Examined: 0.06744 mm2 Magnification: 1 GRID BOX: GRID ID: yJJ

# Grid Openings: 6 _ 20,000 Accelerating Voltage: 100 Key Analysis Date: 11/23/01

I Analysis Performed By: ROMAN PEYSAKHOV

I G0. Structure Structure Type Length ID of Structure N or V EDS (Nonadb —Ij No F B C M >=05 u >=5p Chrys Amphiboie Nonasb Ambig/ND Elements) No Coord <5u zJ r. %-- tr t Lf a-1 (/ I I Z -.r (l 11111 I: I I

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I Struct => 0.5u > 5: I Aspect Ratio v= Positive diffraction pattern progenies conforming to Grid acceptance: <50% undissoived filter, overlapped or foidec Totals <10% particulate coverage >50% coverage ate

I laooratory identification critena observed least 20 unfolded or overlapped grid squares <5% F B C NI I >5u V= EDS spectrum conforming to laboratory holes or opaque areas inentification criteria observed Chrysotile AMPHIBOLES Amphibole I F = Single Fiber B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersecnonsl Amosite Crocidolite Anthophyllite Ambiguous Non-Asbestos Tremolite

1 M = Matrix NSD = No Structures Detected Actinolite i Non-Identified i I li

NYC-WTC 000104448