TEM Asbestos air sample data sheet, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: OTC BOE Volume (liters): 1899 Lab Group #: 6009 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 5 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: 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 7 EDS (Nonadb No F B C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

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Struct = > 0.5n-> 5; I Aspect Ratio Gnd 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 overiapped grid squares <5% B C M >5u 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 apart Crocidolite Ambiguous C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467307 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180636