TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6105 Filter Type / Filter Area: MCE 385 Lab Sample #: J Grid Opening Size: 0.01124 Client Sample #: 3 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV j # Grid Openings: 4 Analysis Date: 12/15/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=05 p :>=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <6p Elements)

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Struct = > 0.5u > 5-. 1 Aspect Ratio Grid acceptance: 7= Posifive diffraction pattern properties conforming to <50% undissohed filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% p- B C M >5u \ = EDS spectrum conforming to laboratory holes or opaque areas identfication criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) ■ Anthophyllite i Non-Asbestos ] T remoiite i M = Matrix i Actinolite I Non-Identified NSD = No Structures Detected

CITY_21MC100_003104782

NYC-WTC_000184206