TEM Asbestos air sample results, ATC, Sept 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC VolumeJIiters); 1928 Lab Group #: 8837 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0 01124

Client Sample #: 09 Area E.xamined: 0 04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Acceierating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N oi N EDS (Nonadb No F B C >=v.. I '=5(j Chrys Amphibole Nonasb Ambig/ND , XI No Cooid <5|J Elements)

rVzM ---------------- 1

If (I ^0

Struct = > 0 5p >5 I Aspect Ratio Gnd acceptance

\= Positive diffraction pattern properties conforming to <50% undissolued filter overlapped or folded Totals laooratory identification criteria obsen/eo <10% particulate coverage >50% coverage ate least 20 unioided or overlapped grid squares <5% F EDS spectrum conforming to laboratory holes or opaque areas F j B i C M 1 >cu 'centificaticn criteria obsen/efl Chiysotile j AMPHIBOLES Amphibole i F = Single Finer Amosite B = Biinale ,<3 fibers <1 fiber aiameter apart Crocidolite Ambiguous I C = Custer '>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3431389 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175526