TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: OTC BOE Volume (liters): 1920 Lab Group #: 6629 Filter Type / Filter .Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 8 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/11/02

■Analysis Performed By: MARK PEYSAKHOV

GO^ Structure Structure Type Length ID of Structure N or V EDS No (Nonadb B C M >=05 IJ >=5|j Chrys Amphibole Nonasb AmbigZND No Coord <5|J Elements)

Struct = > 0.5n > 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

V= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas [F B C M >5m 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3467861 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181014