TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6010 Filter Type / Filter Area: MCE 3S5 mm’ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 2 Area Examined: 0.04496 mm’

GRIP BOX: Magnification: 20,000 GRIPID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/1/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS (Nonadb No F B C >=06 p r >=5)j Chrys Amphibole Nonasb Ambig/ND No- Coord Elements) I

3 <S>

Struct = > 0.5u .>5:1 Aspect Ratio Grid acceptance:

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

CONFIDENTIAL, CITY_21MC100_003458557 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179268