TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NVC BOE Volume (liters): 1928 Lab Group #: 8162 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 7 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/18/02

Analysis Performed By: MARK PEYSAKHOV

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

3

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 least 20 unfolded or overlapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile Famphiboles I Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i Anthophyllite \ Non-Asbestos C = Cluster (>3 Intersections) Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 03105776

NYC-WTC_000184918