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 6087 Volume (liters): Filter Type / Filter Area: 1300 MCE 385 mm= Lab Sample #: 1 Grid Opening Size: 0.011 ,,E I Client Sample #: I Area Examined: 0.06-44 mm= GRID BOX: Magnification: 20,000 I GRID ID: •.3 Accelerating Voltage: 100 Key Grid Openings: 6 Analysis Date: 12-' 13:01

I Analysis Performed By: R MARK PEYSAKHOV

I GO. Structure No Structure Type Length to of Structure N or EDS (Nonaob F B C M '=05 P >=5p i Chrys Amphibole Nonasb I AmbigiND No Coord <Su j Elements)

n n 1(

~~ 1)

G /f

I I j

I

I

I j I

I I I I

I

I Struct => U.5µ > 5: Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties contorming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

LI '1= EDS spectrum conforming to laboratory identification criteria ooserved least 20 unfolded or overlapped gnu squares <5% holes or opaque areas Chrysotile F B C VI I >5µ

F = Single Fiber Amphibole j 1 Amosite yu I B = Bundle 1<3 fibers <1 fiber diameter apart Crocidolite Ambiguous j j I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i I M = Matrix Tremolite Actinoiite Non-Idenutied I I NSD = No Structures Detected !

NYC-WTC 000104501