NYC-WTC_000201546

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1920 .. Lab Group #: 7494 Filter Type / Filter Area: MCE 385 Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04’ Area Examined: ■ 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/21/02

Analysis Performed By: MAKK.PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS No (Nonadb F B C M >=05 fJ I >=5(j Chrys Amphibole - Nonasb Ambig/ND No Coord <5p- Elements)

S’.

V

Struct = > O.Sp _> 5; 1 Aspect Ratio Grid acceptance; 'J- Positive diffraction pattern properties conforming to <50% undissotved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 2C unfolded or ovarlapped grid squares <5% F B • C M >5p EDS spectrum conforming to iato'aionr holes or opaque areas identification criteria observed Clirysotile i AMPHIBOLES j ' Amphibole F - Single Fiber i Amosite ' I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite I M = Matrix Non-Identified NSD = No Structures Detected Actinolite I L

NYC-WTC_000201549