NYC-WTC_000220820

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: N YC BOE Volume (liters): 1840 Lab Group #: 7404 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 09 Area Examined: 004496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/13/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 'Z EDS (Nonadb No F B C M >=5p Chrys Amphibole Nonasb Arnbig/ND . No Coord Elements) <5p MS /I4I JCL- -t—

Struct = > O.Sp > 5:! Aspect Ratio Grid acceptance: Positive difiraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p '/= EDS spectrum conforming to laboratory holes or opaque areas identification cnteria observed Chrysotile i 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 Delected

CITY_2IMCl00_000621813 NYC-WTC_000220820