NYC-WTC_000230287

NYC 9/11 Public Portal Document

TEM Asbestos (air^ Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6609 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size.: 0.01124

Client Sample #: 3 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/9/02

Analysis Performed By: MARK PEYSAKHOV

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

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: N= 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 spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile 'amphiboles"' Amphibole F = Single Fiber Amosite B = Bundle {<3 fibers <1 fiber diameter apart Crocidolite I Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite ! M = Matrix Actinolite iI Non-Identified NED = No Structures Detected

CONFIDENTIAL, CITY_21MC100_002723143 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230287