NYC-WTC_000217868

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6619 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0 01124

Client Sample #: 08 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: /esc Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/10/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v =DS No (Nonadc F B C M >=05 u >=5tj Chrys Amphibole Nonasb 1 AmbiglND No Coord <5p Eiemenis)

4/ C

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Struct = > 0.5|i > 5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

'Z’ EDS spectrum conforming to laboratory leasl 20 unfolded or overlapped grid squares <5% holes or opaque areas ______ P B ! C M i 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 1 ■ Tremolite M = Matrix Actinolite Non-Identified I I ;____ j_ . NSD = No Structures Detected

CITY_21MC100_002877978

NYC-WTC_0002 17868