Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 1300 Lab Group #: 6159 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.06744 mm=

GRID BOX: c Magnification: 20,000 GRID ID: '€) Accelerating Voltage: 100 KeV # Grid Openings: 6 Analysis Date: 12.20/01 I Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C • M• >=05 c5uu >-SN i Chrys Ampnibole Nonasb Ambig!ND No Coord Elements)

3 `

I I r

I I I ! I I I I I I

I I I I l i i

I I Struct _ > O.5u - 5: 1 Aspect Ratio Gna acceptance.

Positive diffraction pattern properties conforming to <50% undissolved filter, ovenappec or foiled Totals

I v=

laboratory iaentification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <41% F B C v= EDS spectrum conforming to iaooratory holes or opaque areas identification criteria observed Chrysotile

I F = Single Fiber 5 = Bundle t <; fibers <1 fiber diameter apart A.rMPH1BGLES Amosite Croctdoiite Amphiboie Ambiguous Custer f> Intersections; Anthoohvllite Non-Asbestos I

I I Tremolite M= Non-identified Matrix Actinolite NSD = No Structures Detected _

NYC-WTC 000104486