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 6159 Volume (liters): 1300 Filter Type / Filter Area: MCE 385 mm'

I Lab Sample #: Client Sample #: a 07 Grid Opening Size: 001124 Area Examined: 0.067-4 mm=

I GRID BOX: GRID ID: 6 _ Magnification: Accelerating Voltage: 20,000 100 Key # Grid Openings: 6 Analysis Date: 1220/01 I Analysis Performed By: MARK PEYSAKHOV 1 GO. Structure Structure Type. Length to of Structure N or v EDS No F 6 C M >=05 u >=5i Chrys Amphibole Nonaso Ambig/ND (Nonadb No Coord <Su Elements) I

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I Struct = > 0.5u - 5: 1 Aspect Ratio Grid acceptance: v='ositive oiffractior pattern properties conforming to <50% undissolved filter, overlapped or folaee Totals

1 iaooratory ioenttfication criteria ooserveo J= EDS spectrum conforming to iaooratory identification criteria ooserveo <10% particuiate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% holes or opaque areas Chrvso tile F _ B 'ou

I F = Single Fiber E = Eunole (<3 fibers <1 fiber diameter apart AMPHIBOLES Amosite Crocidolite Anthophyllite Amphibole Ambiguous = Cluster i>3 intersections, Non-Asbestos

I M = Matrix Tremolite Actinolite Non-Identified NSC = No Structures Detectea _ __ ----- •--.-- I

NYC-WTC 000104481