TEM asbestos analysis data sheet, Sep 2002

NYC 9/11 Public Portal Document

TEM Asbesfos (air) Count Sheet Client .Name: NYC BOE yolum^JJitersJL 1920 Lab Group 8828 Filter Type / Filter Area: MCE 3S5 mm’ Lab Sample 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/10/02

Analysis Performed By: MARK PEYSAKIIOV

GO. Structure Structure Type Length ID of Structure N or 'Z EDS No (Nonadb F B C M «05p >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements) ”7

t Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance:

V - 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 •J= EDS spectrum conforming to laboratory holes or opaque areas tOentificaiion criteria observed Chrysotile ■AMPHIBOLES •Amphibole F = Single Fiber Amosite B.=-0uridle (<3 fibers <1 fiber diameter apart Crocidolite •Ambiguous 'C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3422O53 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175310