NYC-WTC_000201143

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC Bn 11 Volume (liters): 1840 Lab Group #: 7890 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 09 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/28/02 Analysis I ci lormed By: /\J

ROMAN PEYSAKHOV

go: Structure S' .ic'jre Type Length ID of Structure Nor/ EDS (Nonadb No F C M >=C5 (J Chrys Amphibole Nonasb Ambig/ND Elements) ___ No Goord <5|J

a

Struct = > 0.5fi >5:1 Aspect Rar Grid acceptance: a/= Positive diffraction pattern properties cc ' " ng to- <50% undissQlved filter, overlapped or folded, Totals laboratory identification criteria obsereed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p t/= EDS spectrum conforrhing to labcrator holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter a ■ Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Idcntificd NSD = No Structures Detected

NYC-WTC_000201151