Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet Client dame: ETC I Lab Group n: 5954 Volume (liters): 1300 Filter Type / Filter Area: MCE 3e5 mm= Lab Sample #: 4 Grid Opening Size: 0.01124 I Client Sample #: 4 Area Examined: 0.06744 mm~ GRID BOX: c7 _ Magnification: -0.000 I GRID ID: ^' Accelerating Voltage: l00 KeV # Grid Openings: 6 Analysis Date: 11.'23,01

I Analysis Performed By: ROMAN PEYSAK.HOV

G0 ; Structure i Structure Type Length tructure Nor v I I No F 6 C M I >=05 a >=5N Chrys Ampnibole Nonaso Ambig/NC (Nonadb No Coord I <5u Elements)

11 i I j I'

V I I I I I ~ I i I

I i I I I I I I I j I I

I I I I i i I I j I I I Struct = - 0.5µ > 5: 1 Aspect Ratio Grid acceptance: <50% undissolved filter. overlapped or toldea v= Positive dtfframon oartem prooerties conrorming to Totals laooratory identification cntena ooserved <10% particulate coverage >50% coverage ate least 20 unfolded or ovenappeo grid squares <5% I EDS spectrum conforming to iaooratory ,aennfication cntena ooserved holes or opaque areas C hr sorile F B C M >5u

AMPHIBOLES AmPiliboie F = Single Fiber Amosite I B = Bundle 1<3 fibers <1 fiber diameter apart C = Custer 1>3 intersections) Crocidolite Anthoohyllite Ambiguous Non-Asbestos M = Maim Tremolite Actinolite Non-uenrtIied I NSC = No Structures Detected

NYC-WTC 000104444