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 6255 Volume (liters): 1360 Filter Type / Filter Area: DICE 335 mm- Lab Sample #: ? Grid Opening Size: 0.01124 I Client Sample #: 3 Area Examined: 0.06744 mm= GRID BOX: J z E' Magnification: 20.000 I GRID ID: # Grid Openings: 6 Accelerating Voltage: Analysis Date: 101) Key' 13/02

I Analysis Performed By: MARK PEYSAKHOV

I GO. Structure No Structure Type F B C M '=05 µ Length >=5p Chrys ID of Structure Amphibole Nonasb N or d AmbiglND EDS (Nonasb No Coord <5N Elements)

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I I I I l i I i I I

I I Struct = > U.5µ > 5' 1 Aspect Ratio J= Positive diffraction pattern propertes conforming to Grid acceptance: <50% undissolved filter, overlapped orfoldea laooratory ioennfcation criteria observea <10% particulate coverage >50% coverage ate

I v= EDS spectrum conforming to laboratory dentfication criteria observed least 20 unfolded or overlapped grid squares <5% holes or opaque areas Chrysotile I F B C MI >5u

AMPHIBOLES Amphibole P = Single Fiber I I

I S = Bundle 1<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Amosite Crocidolite Anthophyllite Tremolite Ambiguous f Y !

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

NYC-WTC 000104495