Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet Li Client Name: Lab Group #: ATC 61-59 Volume (liters): Filter Type! Filter Area: 1300 MCE 3S5 mm=

I Lab Sample #: Client Sample #: 9 12 Grid Opening Size: Area Examined: 0.01124 0.0674 mm=

I GRID BOX: GRID ID: _` GG Magnification: Accelerating Voltage: 20.000 100 KeV # Grid Openings: 6 Analysis Date: 12/20/01

I Analysis Performed By: MARK PEYSAKHOV I GO Structure Structure Type Length ID of Structure N or EDS (Nonadb No F B C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5u demerits)

ms s _3 _3 I - -

I I I I I I I

I I I I C

I I i

I I I I I

I Struct = > O.5 > 5. 1 Aspect Ratio Grid acceptance: <50% undissolved Filter, ovenapped or folded Totals v= Positive diffraction pattern properties conforming to

I ~aooratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid scuares <5% F B L NI 'Su v= EDS spectrum conforming to laboratory holes or ooaoue areas identification criteria observed Ch vsotiie AMPHIBOLES

I = = Sinote Fiber •., fibers <1 fiber diameter apartn B = G,.tingle 1 <3 Amcstte u r.,roctdolite Anthoonvflite I Amhiboie P Ambiguous i~ Non-Asbestos —I

,, Cluster (>2 intersections; T remolite

I M = Matrix NSC = No Structures Detec:ed Actinoiite — . _.__. __ Non-Identified —

NYC-WTC 000104476