NYC-WTC_000230361

NYC 9/11 Public Portal Document

/lY-' TEM Asbestos (air) Count Sheet Client Name: hTYCBOE Volume (liters): 1936 Lab Group #: 6766 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/21/02

Analysis Performed By: MARK PEYSAKHOV

GO^ ■ Structure Structure Type Length ID of Structure Nota/ EDS No (Nonadb F B C M >=05 p :>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elemenis).

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Struct = > 0.5|i > 5;1 Aspect Ratio Grid acceptance: ^1= Positive diffraction pattern properties conforming to <50% undissoived 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 'Z- EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile amphibole's’ ' Amphibole F = Single Fiber, Amosite 0 = 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_003389130

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230361