NYC-WTC_000212411

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet (?lient Name: NYC BOE Volume (liters): 1928 i ab Group #: 7355 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: ■7 Grid Opening Size: 0.01124 (?lient Sample #: 07 Area Examined: 0.04496 mm^ (;RID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV fr Grid Openings: 4 Analysis Date: 4/8/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure NorN EDS No (Nonadb F B C M >=05 p >=5(j Chrys Amphibole Nonasb Ambig/NO '■Io Coord <5p Elements)

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Struct = :> 0.5p > 5:1 Aspect Ratio Grid acceptance: \ = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals iBtwratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5p v = EDS spectrum conforming to laboratory holes or opaque areas ioentification criteria observed Chrysotile AMPHIBOLES ’ Amphibole F = Single Fiber Amosite ' B = Bundle (<3 fibers <1 fiber dameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite (V = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 02866429

NYC-WTC_000212411