Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet Client Name: ATC I Lab Group #: 6217 Volume (liters): 16-50 Filter Tvpe/ Filter Area: MCE 385 mm Lab Sample #: 1 Grid Opening Size: 0.01 1 24 I Client Sample #: 003 Area Examined: 0.0562 mm= GRID BOX: Magnification: I GRID ID: # Grid Openings: 5 :Accelerating Voltage: Analysis Date: 20.000 100 KeV 12.'2Sr'0I

I Analysis Performed By: _- - MARK PEYSAKHOV

I GO Structure Structure Type j Length ID of Structure N or v EDS No F B C M >=05 N (Nonadb >=5N Ch s Amphibole Nonaso Ambig/ND No Coord <5~ ry Elements) I

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I ~ I ~ - - I I I Struct = % 0.5 µ > 5: 1 Aspect Ratio Grid acceptance: °osrttve diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals aooratory identification criteria ooserveo <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F v1 I v= EDS spectrum conforming to laboratory dentification criteria observed holes or opaque areas Chrvsotile B >Su

.AMPHIBOLES Single Fber Amphibole Amcslte I B = Bundle l<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C= Cluster t>3 Intersections) Anthophyllite Non-Asbestos —T — M = Matnx Tremolite Actinolite Non-Identified NSD = No Structures Detected I NYC-WTC 000104520