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): 3700 Lab Group #: 9035 Filter Tyne / Filter Area: MCE 385 mm2 • Lab Sample #: 13 Grid Opening Size: 0.01124 Area Examined: 0.24728 mm2 Client Sample #: 13 GRID BOX: /`/73 / Magnification: 20,000 GRID ID: ZA Accelerating Voltaire: 100 KeV # Grid Openings: 22 Analysis Date: 10/29/02

Analysis Performed By: R/ ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS (Nonad F B C M >=05p >=5p Chrys Amphibole Nonasb AmblgiND No Coord NO u Elements

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A Photo o. tmm 1m5 asbestos con mmosambesl 5V, N~1V. Struct = > 0.5{.i -> 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals d= 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 >5µ holes or opaque areas d= EDS spectrum conforming to laboratory Chrysotile identification criteria observed AMPHIBOLES Amphibole. F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Trernolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

NYC-WTC 000131679