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): 3800 Lab Group #: 9035 Filter Type / Filter Area: MCE 385 mm2 S Lab Sample #: Client Sample #: 12 12 Grid Opening Size: 0.01124 Area Examined: 0.24728 mm2

GRID BOX: /q7 7 Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 22 Analysis Date: 10/29/02

Analysis Performed By: ~/~ ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure Nor EDS No Ambig/ND (Nonasb F B C M >=05 P >=5µ Chrys Amphibole Nonasb No Coord <5p Elements)

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Photo No. lfrom n 5 asbestus contalni , same es VIIU awafflrn u.c. Struct = > 0.5p ? 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals '= Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laooratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C I M >5µ holes or opaque areas v= EDS spectrum conforming to laboratory Chrysotile iaentifipdon criteria observed

• F = Single Fiber B = Bundle (<3 fibers <1 fiber diameter apart AMPHIBOLES Amosite Crocidolite Amphibole Ambiguous C = Cluster (>3 Intersections) Anthoptiyllite Non-Asbestos ! i l I l Tremolite M = Matrix Non-Identified Actinolite NSD = No Strictures Detected

NYC-WTC 000131549