TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

/ TEM Asbestos (air) Count Sheet Client .Name: NYC BOE Volume (liters): 1800 Lab Group #: 7291 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: GEUD BOX: GRIDID; w Area E.xamined: Magnification: ■Xccelerating Voltage: 0.04496 mm-

20,000 100 KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: ROMAN PEYSAKHOV

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

// tC

H H I i Struct = > I).5g >5:1 .Aspect Ratio Grid acceptance: 7= Positive diffraction pattern propehies conforming to <50% undissolved filter, overlapped or folded Lo tills laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% B ! C I M >5|J v= EDS spectrum conforming to lacoratory boles or opaque areas identification criteria observea ! Chrysotile , .AMPHIBOLES Amphibole 1 F = Single Fiber Amosite 8 = Bundle 73 fibers <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster (>3 Intersections! Anthophyllite I Non-Asbestos i Tremolite M = Matrix Actinolite t Non-Identified ' NSD = No Structures Detectec

CONFIDENTIAL, CITY_21MC1OO_OO347O764 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176723