TEM Asbestos Air Sample Results, NYC DOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet ClientNarn^ NYC BOE Volume (liters): 1920 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 4 Area Examined: 0.04496

grid BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb Nd F B C M >=06 y >=5(J Chrys Arnphiboie Nonasb Ambig/ND No Coord Elements)

1 7^^-----

‘Struct = > O.Spi > 5:1 Aspect Ratio Grid acceptarcei /=. 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 >5tJ V = EDS spectrum conforming to laboratory holes or opaque areas 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 Actinolite Non-Identified NSb = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430657 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175217