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): 1300 Filter Type / Filter Area: DICE 385 mm= Lab Sample #: 7 Grid Opening Size: 0.01124 I Client Sample #: 7 Area Examined: 0.06744 mm= GRID BOX: Magnification: 20.000 I GRID ID: # Grid Openings: 6 Accelerating Voltage: Analysis Date: 100 Key 12/13/01

I Analysis Performed By: 'LARK PEYSAKHOV

I GC. Structure ; Structure Type No F B C M >~5 N Length >=5N Chrys ID of Structure Amphibole Nonaso iv or J AmbigiND EDS (Nonadb No Coord I Elements; I <5N

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I Struct = > 0.5µ > 5:1 Aspect Ratio Grid acceptance: v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals aboratory identification criteria ooserved <10% particulate coverage >50% coverage ate

I J= EDS spectrum conforming to laooratory dentification criteria observes least 20 unfolded or overlapped grid squares <5% holes or opaque areas Chrysotile F B C M > u

AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle <<3 fibers -=1 fiber diameter apart Crocidolite Ambiguous I I I C = Cluster p3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected I

NYC-WTC 000104507