TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1992 Lab Group #: 6409 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 06 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By: MARKPEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or y EDS (Nonadb ■ No F B C M >=05 p >=51J Chrys Amphibole Nonasb Ambig/ND No: Coord Elements)

; I

StTuct = > 0.5(1 .> 5:1 Aspect Ratio 3rid acceptance;

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 •/= EDS spectrurTi conforminc to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Singfo Fiber I Amosite B = Bundle (<3-fibers <1 fiber diameter apart I Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660209

NYC-WTC_000174776