TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume fliters): 1920 Lab Group #: 7122 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 2 Area Examined: 0.04496 mm^ GRID BOX: w Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/18/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorV EDS No (Nonadb F B C >=05 u >=5|J Chrys Amphibole Nonasb Ambig/ND INo! Qoord <5m Elements)

If -k__

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: a/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

A- EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5p

identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 6 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix - Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003466863 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180353