TEM air sample results, 125 Liberty St, Oct 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet a

Client Name: ATC Volume (liters): 3600

• Lab Group #: Lab Sample #: 9035 40 Filter Type / Filter Area: MCE 385 mm2 Grid Opening Size: 0.01124 Client Sample #: 40 Area Examined: 0.24728 mm2 GRID BOX: Magnification: 20,000 GRID ID: __ # Grid Openings: 22 - - Accelerating Voltage: 100 KeV Analysis Date: 10/29/02

Analysis Performed By: r _ ROMAN PEYSAKHOV

• GO. Structure Structure Type Length ID of Structure N or EDS No >=05 i. Amphibole Nonasb Ambig/ND (Nonadb F 8 C M >=5p Chrys No Coord <5p Elements)

522 ( i ✓i

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n Photo No. itrom in 5 asbestos contamino samo iV ufuu awepuufw: Strad = > 0.5N > 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals 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 IB C M >5i holes or opaque areas V= EDS spectrum conforming to laboratory Chrysotile #- ; • identification alters observed F = Single Fiber I AMPHIBOLES Arnosite Amphibole Ambiguous B = Bunale (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyiite Non-Asbestos Tremolite M = Matrix Von-Identified Actinolite NSD = No Structures Detected

NYC-WTC 000131706