Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I TEVI Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 1300 Lab Group #: 6087 Filter Type ' Filter Area: MCE 385 mm= Lab Sample #: 2 Grid Opening Size: 0.01124 I Client Sample #: 2 Area Examined: 0.06744 mm=

GRID BOX: C Magnification: 20.000 I GRID ID: 3 -f Accelerating Voltage: 100 Key" # Grid Openings: 6 Analysis Date: 1213/01

I Analysis Performed By: I P MARK PEYSAKHOV

I GO Structure 1 Structure Type Length ID of Structure Nor v Ens No F B C M INcnadb '=05 µ >=5N Chrys Amphibole Nonasb Ambig/ND No Coord <5N Elements)

I if l I rI 2 f r

I ! I I i I I I i I ~ I ! I I I

I I ! I I I C I I 1 I

I ' I I I i I Struct => 0.5µ > 5: ! Aspect Ratio Grid acceptance: v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid sduares <5% F B l C [J v= EDS spectrum conforming to laboratory identification cntena observed holes or opaque areas Chrysotile i YI ..5u

AMPHIBOLES Amphibole F = Single Fiber Amosite I B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster I>3 lntersecOuons) Crocidolite Anthopnyllite Ambiguous I Non-Asbestos M = Mamx Tremolite Actinotite Non-identi ied I NSD = No Structures Detected 1 I

NYC-WTC 000104502