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 6226 Volume (liters): 1-50 Filter Type! Filter Area: NICE 385 mm- 2 Grid Opening Size: 0.01124 I Lab Sample #: Client Sample #: 004 Area Examined: 0.04496 mm=

GRID BOX: ~Zr_ Magnification: 20,000 I GRID ID: 307 # Grid Openings: 4 Accelerating Voltage: Analysis Date: 100 KeV 1230i01

I Analysis Performed By: RP ROMAN PEYSAKHOV

I GO I Structure No i Structure Type I F g C M >=05 µ Length IC of Structure Amphibole Nonaso N or ", Ambig/ND _DS (Nonaab >=5p Chrys Ni.) Coord ! <5µ I Elements)

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I I I !

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I I Suvct = = U.5µ >5. 1 Aspect Ratio J = Positive aitfracnon pattern orooerties conforming o End acceptance: <50% undissolved filter, overlapped or folaea Totals larioratory iaentificanon criteria coservea <10% particulate coverage >50% coverage ate

I v= EIS soectrum conforming to laooratory dentificatton criteria ooservea least 20 unfolded or overlapped grid squares <5% notes or opaque areas C1irvsotile F I B ! C 111 >5u

AMPHIBOLES Amphibole ! j

I F = Single Fiber B = Bungle <3 fibers <' fiber mameter apart =Cluster ;>3 Intersecnonsl Amosite Croctdelite Anthophyllite Ambiguous Non-Asbestos M = Matrix Tremoiite

I NSC = No Structures Cetectea Actinofte Non-Identified

NYC-WTC 000104530