TEM air sample results, 125 Liberty St, Oct 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 3900

• Lab Group #: Lab Sample #: 9035 2 Filter Type / Filter Area: MCE 385 mm2 Grid Opening Size: 0.01124 Area Examined: 0.24728 mm2 Client Sample #• 2 GRID BOX: /) 7 '5 Magnification: 20,000 GRID ID: /J/'1 Accelerating Voltage: 100 KeV # Grid Openings: 22 Analysis Date: 10/29/02

Analysis Performed By: !Q /" ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor EDS (Nonadb No F g• C M >=05 N >=5µ Chi is Amphibole Nonasb Ambig/ND No Coord <sµ Elements) 19f1 / vrte'

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j am,.. t lk~ 4- ft

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I I Photoo. ihDm 1 n 5 asbestOs con imna samo VI IV WACIJICU IVO.

Struct = > 0.5µ > 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals Ii Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M j >51.i holes or opaque areas v= EDS spectrum conforming to laboratory Chrysotile identification criteria observed AMPHIBOLES Amphibole F = Single Fiber Amosite Ambiguous B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster 1>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected — _-- --- ---- -- _ —— , 1

NYC-WTC 000131539