TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6645 Filter Type / Filter Area: MCE 385 mm-’ Lab Sample #: 3 Grid Opening Size: 0.01124

Client Sample #: 3 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 2/12/02

Analysis Performed By: MARK PEYSAKHOV

GO^ Structure Structure T ype Length ID of Structure N or 7 EDS I (Nonadb [ No F B c M >=05 p >:>5p Chrys Amphibole Nonasb Ambig/ND Elements) | No Coord <5|J

Struct = >0.5p >5;1 Aspect Ratio Grid acceptance; 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5u 'J= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = Nd Structures Detected

CONFIDENTIAL, CITY_21MC100_003467877 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181026