NYC-WTC_000224538

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1984 Lab Group #: 7675 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 mm"

GRID BOX: ///7 Magnification: 20,000 GRIDID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/8/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or N EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/NO . No Coord Elements) <5p ■3^

__ Il__ i/

Struct = > O.op > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <60% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

y'= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B I C M >5p holes or opaque areas —I— identification criteria ooserved Chrvsotile .AMPHIBOLES Amphibole F = Single Fiber Amosite E = 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_002893245

NYC-WTC_000224538