NYC-WTC_000230186

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume fliters): 1952 Lab Group #: 6516 Filter Type / Filter Area: MCE ■ 385 mm= Lab Sample #: 8 Grid Opening Size: 0.01124' Client Sample #: 8 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/31/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS No (Nonadb F B C M >=05 p Chrys Amphibole Nonasb AmbigyND No Coord <Sp Elements)

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: 9= Posith/e 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 EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile I amphiboles'^ Amphibole F.= Single Fiber Amosite I B = Bundle (<3 fibers <1 liber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ■ Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388895 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230186