NYC-WTC_000212928

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 8195 Filter Type / Filter Area: MCE 385 Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/20/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

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Struct ~>0.5p >5:1 Aspect Ratio Grid acceptance: A- Positive diffraction pattern proiterties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% pariiculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m 'l~ EOS spectrum conforming :o laboratory holes or opaque areas identification catena observed Chrysotile AMPHIBOLES ' Amphibole F - Single Fiber Amosite 8 - Sunale (<3 fibers <1 liber diameter apart Crocidolite Ambiguous C i: Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrx Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO2852618

NYC-WTC_000212928