NYC-WTC_000215208

NYC 9/11 Public Portal Document

TEM Asbestos fMICROVAC) Count Sheet Client Name: NYC BOE Volume (ML): 20 Lab Croup #: 6481 Surface Area Sampled 100 Lab Sample #: 7 Client Sample #: 90-07 Magnification: 20,000

GRID BOX: Accelerating Voltage: 100 KeV GRID ID: ^-^ 3 eg # Grid Openings: 5 Analysis Date: 1/28/02

Analysis Performed By: .MARK PEYSAKHOV

GO. ■ Structure Structure Type Length ID of Structure EDS (Nonadb No F B C M Chrys Amphibole Nonasb Ambig/ND , Elements)

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Struct = > 5.Op >3:1 Aspeci Ratio Grid accepiance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

>/= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5p I

identification criteria observed Chtysotile AMPHIBOLES I Amphibole F = Single Fiber Amosite ; B = Bundle (<3 libers <1 fiber diameter apart Crocidolite I Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite ' M = Matrix Non-Idenrifier3 Actinolite NSD = No Structures Detected

CITY_21MC100_002872019

NYC-WTC_000215208