TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (litersi: 1944 Lab Group #: 6408 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 16 Grid Opening Size: 0 01124 Client Sample #: 16 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By: MARK PEYSAKHOV

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

z- —

Struct = > 0.5p .> 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 >5p •i- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibera <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite ' NSD = No SIructures Delected

CONFIDENTIAL, CITY_21MC100_003467476 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180753