Asbestos air analysis results, H.S., April 2002

NYC 9/11 Public Portal Document

TEM-Asbestos (air) Count Sheet Client Name: m’C BOE Volume (liters): 1920 Lab Group #: 7333 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm~

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/5/02

.Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 4 EDS No (Nonadb F B C M >=05 u >=5|J Chrys Amphibole Nonaso Ambig/ND No Coord <5u Eiemenls)

1 I

Struct = > 0.5p > 5; I Aspect Ratio Grid acceptance'

4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totajs <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfoldec or overapoed grid squares <5% f F B C M >5u 4= EDS spectrum conforming to laboratory boles or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ) ! i C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Actinolite j Non-Identified I NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003459904 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179524