TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7207 Filter Tvpe / Filter Area: MCE 385 Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm^

GRID BOX: W5’ Mannification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Nor v EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

JL zZ.

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I Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% partculate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% ( F B C M >5u v= EDS spectrum conforming to laboratory holes or opaque areas L identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster ;>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102806

NYC-WTC_000183562