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): 1920 Lab Group #: 7494 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B I C M >=05 p ; ■=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

3 aV- CT' A-

r~r-l .Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals ianoratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid scuares <5% f F \ - EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed I Chrysotile -1----\-------- .AMPHIBOLES I Amphibole । E = Single Fiber Amosite 3 = Sundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections! Anthophyllite j Non-Asbestos ! Tremolite M = Matrix Non-Identified i Actinolite NSD = No Structures Detecteo

CONFIDENTIAL, CITY_21MC100_003471170 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176995