Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

TEM1 Asbestos (air) Count Sheet Client same: ATC I Volume (liters): 1500 Lab Group #: 6217 Filter Type / Filter Area: 38; mm= MCE Lab Sample #: 6 Grid Opening Size: 0.01124 I Client Sample #: 008 Area Examined: 0.0562 mm= GRID BOX: Magnification: 20.000 I GRID ID: C-. Accelerating Voltage: 100 KeV # Grid Openings: 5 Analysis Date: 1-2.2801

Analysis Performed By: lam'-~ —_ MARK PEYSAKHOV I GC Structure Structure Type Length ID of Structure N or v EDS No j F B C M >=05 a >=5p ChryS Amphibole Nonaso AmbigiND (Nonaab No Coord <SN Elements)

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Struct = > 0.Su > 5: I Aspect Ratio God acceptance: v= Positive diffraction pattern properties conforming to <50% undissolved filter, overapped or folded Totals laboratory identification criteria ooservec <10% particuiate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% I v= EDS specrum conforming to laboratory holes or opaque areas F B C M "Su identification criteria opservec Chrysotile AMPHIBOLES F = Single Fiber Amphibole Amosne I B = Bundle i <3 fibers <1 fiber diameter apart Crocidolite Ambiguous

II C = Custer I'S :ntersecnonsl Anthophyllite Non-Asbestos ! M = Matrix Tremotite i Actinolite ! Non-Identified NSD = No •Structures Detected _ __

NYC-WTC 000104525