Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet C Client Name: Lab Group #: ATC 6087 Volume (liters): Filter Type / Filter Area: 1300 NICE 385 mm~ Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample#: 5 Area Examined: 0.06744 mm=

GRID BOX: 5' Magnification: 20,000 GRID ID: ,1 "~ -- Accelerating Voltage: 100 KeV # Grid Openings: 6 Analysis Date: 12,-13,'01

Analysis Performed By: 1QAD MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or y EDS (Nonaeb No F B C M >o5 u >=5N ChryS Amphibole Nonasb Ambig/ND No Coord <5N Elements)

2- ti

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I S truct => O.5µ > 5. 1 Aspect Ratio Gnd acceptance: v= °ositive diffraction pattern properties conforming :o <50% undissolved filter, overlapped or folded Totals laboratory identification cntena observed <10% particulate coverage >50% coverage ate least 20 unfolded or ovenapped gnd squares <5% C M >5u v= EDS spectrum conforming to laboratory F I B I identification criteria observed holes or opaque areas Clnysotile AMPHIBOLES Amphibole F' Single Fiber Amosite Ambiguous — r I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Anthophyllite C = Custer (>3 Intersections) Non-Asbestos Tremoilte M = Matnx ,von-tdentitied Actfnoute NSD = No Structures Detected I NYC-WTC 000104505