NYC-WTC_000228131

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #•■ 7071 Filter Type / Filter Area: MCE 385 Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm^ GRU) BOX: Magnification: 20,000 GMDU).: <3^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/14/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID Of structure N or V EDS No Amphibole (Nonadb Noj Coord F B C M >=05 p >=5p Chrys Nonasb Ambig/ND <5p Elements)

ZZISS

I I I___________L_J_______ Struct <* > 0.5u .> 5: i Aspect Ratio Grid acceptance. -^= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory Wonttication criteria observed <10% particulatB coverage >50% coverage ate least 20 unladed or overiapped grid squares <5% F B C M I >5m ■^= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amphiboles Amphibole F = Single Fiber Amosite Crocidolite Ambiguous B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-ldentified NSD = No Structures Detected

CITY_21MC100_006617632

NYC-WTC_000228131