Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I TENT Asbestos (air) Count Sheet J Client Name: Lab Group #: ATC 5954 Volume (liters): Filter Type ` Filter Area: 1300 MCE 385 mm2 Lab Sample #: 1 Grid Opening Size: 0.01124 I Client Sample #: 1 Area Examined: 0.06744 mm2 GRID BOX: Magnification: 20,000 I GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 6 Analysis Date: 11;23101

I Analysis Performed By: ROMAN PEYSAKHOV

I GO Structure L tructure Type I Length ID of Structure N or v EDS No N I B C M '=05 11 >=5p ChryS Amphibole Nonase Ambig/ND (Nonadb No Coord <5P Elements)

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Struct = > U.5u > : I Aspect Ratio Grid acceptance: v= Positive diffraction pattern prooertes conforming to <50% undissolved filter, overlapped or roldea Totals laboratory identification critena ooserved <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd souares < I = EDS spectrum conforming to laboratory identification cntena ooserved holes or opaque areas Cluysotile F B C NI >5u

.AMPHIBOLES I Amphibole F = Single Fber Amosite I B = Bungle ,<3 fibers <1 fiber mameter apart Crocidolite Ambiguous C = Custer i>3 Intersections) Anthopnvllite Non-Asbestos M = Matrix Tremolite Actinoiite Non-Identified I NSD = No Structures Detected

NYC-WTC 000104441