TEM Asbestos air sample results, ATC, Sept 2002

NYC 9/11 Public Portal Document

TEM Asbesfos (air) Count Sheet Client Name: ATC Volume (liters): 1920 Lab Group #: 8837 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 6 Grid Opening Size: 001124

Client Sample #: 06 Area Examined: 0 04496 mm=

GRID BOX: GRID ID: yW Magnificatiom A<celerating yoltage2 20,000 100 KeV # Grid Openings: 4 Analysis Date: 9/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or y EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

3^ /W

5^ IS _1(___ ((

Struct = > 0 5n >5 1 Aspect Ratio Gnd acceptance

y = Positive diffraction pattern properties conforming to <50% undissolved (liter, overlapped or folded Totals laeoratory identification cntena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M y= EDS spectrum conforming to laboratory holes or opaque areas Identification cntena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Identified Actinolite NSD = Nc Structures De’ected

CONFIDENTIAL, CITY_21MC100_003431488 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175544