Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

TEMM Asbestos (air) Count Sheet I Client Name: Lab Group #: ATC 6087 Volume (liters): 1300 Filter Type / Filter Area: NICE 335 mm= Grid Opening Size: 0.01 1 24 I Lab Sample #: Client Sample #: 4 4 Area Examined: 0.06744 mm2

GRID BOX: Ef Magnification: 20,000 Li GRID ID: # Grid Openings: 6 Accelerating Voltage: Analysis Date: 100 Key' 12/13/01

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Analysis Performed By: nfD MARK PEYSAKHOV

I GC Structure No Structure Type F 6 C M >=05 N Length >=5N Chrys ID of Structure Amphiboie Nonaso Nor v Ambig/ND EDS (Nonadb No Coord <5u Elements)

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I Struct = > 0.5µ > 5: l Aspect Ratio Grid acceptance: '1= Positive diffraction pattern properties conforming to <50% uncissoived filter, ovenapped or folded Totals aoeratory identification cetera observed <10% particulate coverage >50% coverage ate IC I Jr

EDS spectrum conforming to iaooratery Identification criteria observed least 20 unfolded or overlapped gnd squares <5% 1 holes or opaque areas Chrysotile F B M >5u

AMPHIBOLES Amphibole F = Single Fiber Amosite 6 = 3undle (<3 fibers <1 if ber diameter apart Crocidolite Ambiguous I I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = vlarnx

1 NSC = No Structures Detected Actinolite Non-Identified ;

NYC-WTC 000104504