TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE yolumejliters]^ 1920 Lab Group #: 6598 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV Grid Openings: 4 Analysis Date: 2/8/02

Analysis Performed By: MARK PEYSAKHOV

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

'7 .xCV /

J -3

I Struct = >0.5|r >5:1 Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES ; Amphibole F = Single Fiber i Amosite j B = Bundle (<3 fibers liber diameter apart i Crocidolite Ambiguous 1 Anthophyllite Non-Asbestos C = Cluster (>3 Intersections) Tremolite M = Matrix Non-Identified NSD = No Structures Detected Actinolite L_ L.

CONFIDENTIAL, CITY_21MC100_003467804 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180975