Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

LII TEM Asbestos (air) Count Sheet I Client Name: Lab Group #: ATC 5954 Volume (liters): Filter Type i Filter Area: 1300 MCE 3S5 mm=

I Lab Sample #: Client Sample #: 2 2 Grid Opening Size: Area Examined: 0.01124 0.06744 mm= Magnification: I GRID BOX: GRID ID: # Grid Openings: 6 - 1 Accelerating Voltage: 20,000 100 KeV Analysis Date: 1123/01

I Analysis Performed By: ROMAN PEYSAKHOV

I GO. 1 Structure Structure Type Length ID of Structure Nt or v EDS (Nonadb No F 6 C M >=05 N >=5p Chrys Ampmbole Nonaso AmbigjND No Coord <5u Elements) ( ~j r

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Strucr = > 0.iµ > 5: 1 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 squares <5% F B j C NI I >5u v= EDS spectrum conforming ,o laboratory holes or opaque areas identification cntena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite I B = Bundle (<3 fibers Cl fiber diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections) Anthopnyllite Non-Asbestos I Tremoiite 1 M = Matnx Non-Idennfiea I Actinolite I I i NSD = Na Structures Detected I

NYC-WTC 000104442